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Top 100 AI Prompt Engineering Tools

Ranked by ToolRank — ToolPotion's proprietary traction engine

#1 right nowLangChain72Strong
measured
127
avg. ToolRank
32.2/100
combined audience
4.3M
ToolRank

ToolRank is ToolPotion’s proprietary ranking engine.

It continuously evaluates hundreds of signals across the open web — real traffic and popularity, audience and community strength, authority and longevity, adoption and engagement — processing millions of data points to place every tool where it has earned to be.

Every AI type is measured by its own tailored model: what proves traction for a SaaS app is not what proves it for an open-source framework or a creator channel. Missing a platform never counts against a tool — ToolRank judges the evidence that exists.

No paid placement. No self-reported numbers.

Developers building agents should pick LangChain, the top prompt engineering tool for testing and deploying LLM apps. For ready-made prompts, prompts.chat is a free open-source library, and Langfuse or PromptLayer suit teams that version and test prompts. — Editor's verdict

Quick picks

Best overallLangChain#1Open-source frameworks plus evaluation, observability and deployment tools cover the full lifecycle of building and testing AI agents.
Best free prompt libraryprompts.chat#2A free, open-source prompt library with a 25+ chapter prompt engineering guide, a CLI and self-hosting for private company libraries.
Best for prompt versioningLangfuse#3Separates prompts from code with one-click deploys and rollbacks, and tests prompts on real production inputs across models.
Best for red teamingPromptfoo#5Red-teams your AI app automatically inside CI/CD pipelines, with custom attack profiles and clear remediation guidance.
1 of 4
  1. # 1Top PickLangChainFrameworkLangChain is an AI agent engineering platform that enables developers to build, test, and deploy reliable AI agents. It offers tools for observation, evaluation, and deployment, supporting the entire agent development lifecycle for teams of all sizes.72ToolRankStrong
  2. # 2Runner Upprompts.chatGitHub Repoprompts.chat (formerly Awesome ChatGPT Prompts) is an open-source library of prompts for AI chat models, compatible with ChatGPT, Claude, Gemini, Llama, and Mistral. It's free to browse, contribute to, or self-host with your own branding and authentication, and it also ships a CLI, an MCP server, and a Claude Code plugin. It has over 171,000 GitHub stars.58ToolRankSolid
  3. # 3Third PlaceLangfusePlatformLangfuse is an open-source LLM engineering platform designed to help developers build, monitor, and improve AI applications. It offers tracing, prompt management, evaluation, and analytics in a unified workflow. Langfuse supports various models, frameworks, and integrations, enabling teams to move from prototype to production efficiently.54ToolRankSolid
  1. 4Fabric AI FrameworkGitHub RepoFabric is an open-source framework designed to augment human capabilities using AI. It offers a modular system to address specific problems through a crowdsourced set of AI prompts, applicable across various domains.54ToolRankSolid
  2. 5PromptfooAI AppPromptfoo is an AI security platform designed to identify vulnerabilities in AI applications during development. It offers automated red teaming, integration with CI/CD workflows, and real-time threat intelligence, making it a trusted solution for developers and enterprises alike.53ToolRankSolid
  3. 6PromptBase AI Prompt MarketplaceAI AppPromptBase is a leading marketplace offering over 270,000 AI prompts for various models like ChatGPT, Gemini, and Midjourney. Users can discover, purchase, and sell prompts to generate better AI content, images, and videos, enhancing creativity and productivity instantly.53ToolRankSolid
  4. 7PromptHeroAI AppPromptHero is a leading website for prompt engineering, offering a vast collection of AI prompts for image and video generation. Explore millions of prompts for models like Midjourney, Stable Diffusion, and Sora, and discover community-curated inspiration. It's a go-to resource for AI art enthusiasts and professionals.52ToolRankSolid
  5. 8PortkeyAI AppPortkey offers a production stack for Gen AI builders, providing an AI gateway, observability, guardrails, and prompt management. It democratizes and productionizes Gen AI across organizations, enabling teams to monitor LLM behavior, manage usage, and ensure security and compliance in one unified platform.52ToolRankSolid
  6. 9Helicone AI GatewayAI AppHelicone is an LLMOps platform designed for building reliable AI applications. It provides routing, debugging, and analysis capabilities, enabling developers to monitor and manage their AI models effectively. Trusted by fast-growing AI companies, Helicone offers a free trial to help you build robust AI solutions.51ToolRankSolid
  7. 10SpacePromptsAI AppSpacePrompts is an AI prompt manager that allows users to save, organize, and enhance AI prompts across platforms like ChatGPT and Claude. It offers features like version control, a Chrome extension, and collaborative editing, making prompt management efficient and accessible.49ToolRankSolid
  8. 11AIPRMAIPRM is a productivity tool designed for ChatGPT users, providing access to a vast library of over 4,000 expert-crafted prompts. It enhances content creation efficiency, making it easier for individuals and teams to generate high-quality outputs quickly.49ToolRankSolid
  9. 12DSPyFrameworkDSPy is a Python framework designed for building AI systems by programming language models instead of prompting them. It allows users to define tasks with structured signatures, enabling the creation of maintainable, modular, and optimizable programs. DSPy offers features like modules, optimizers, and the ability to integrate tools, enhancing the development and performance of AI applications.49ToolRankSolid
  10. 13PromptLayerAI AppPromptLayer is a prompt management platform designed for AI teams. It enables versioning, evaluation, and observability of prompts, allowing teams to monitor performance and optimize AI applications effectively.48ToolRankSolid
  11. 14LangWatchAI AppLangWatch is an AI agent testing, LLM evaluation, and observability platform. It allows developers to simulate real-world scenarios, prevent regressions, and debug issues by turning production traces into evaluations. Improve AI quality with every release by testing prompts, models, and agents before deployment.47ToolRankSolid
  12. 15AI Prompt GeneratorAI AppAI Prompt Generator is a free tool that helps users create and optimize prompts for various AI models like ChatGPT, Claude, Midjourney, and Stable Diffusion. It transforms rough ideas into clear, structured prompts in seconds, enhancing AI interaction and creativity.46ToolRankSolid
  13. 16AgentaAI AgentAgenta is an open-source platform for building AI coworkers, ready-made agents for tasks like SEO research, code review, proposal drafting and campaign analysis, that teams run from Slack or Telegram. It supports any LLM provider or your own model, connects to tools like GitHub, Notion, Slack and HubSpot, and offers a free tier plus paid and self-hosted plans.46ToolRankSolid
  14. 17promptoMANIAAI ApppromptoMANIA is a free AI prompt hub and model directory with a visual prompt builder and expert guides for creating optimized prompts for image, video, 3D, and audio models like Midjourney, DALL-E, Stable Diffusion, and FLUX.46ToolRankSolid
  15. 18PromptHub: AI Prompt Management for TeamsAI AppPromptHub is a prompt management tool designed for teams to test, deploy, and manage prompts efficiently. It helps users keep prompts organized and leverage templates to enhance AI interactions.45ToolRankSolid
  16. 19TrueFoundry - Enterprise AI Gateway & MCP GatewayPlatformTrueFoundry is an enterprise-grade AI platform that enables the deployment, security, and scaling of LLMs and AI agents. It offers centralized governance and observability across AI applications, ensuring compliance and cost control for enterprises.45ToolRankSolid
  17. 20ChainForgeAI AppChainForge is an open-source visual programming environment designed for prompt engineering. It allows users to evaluate prompts and text generation models effectively, making the process engaging and straightforward.41ToolRankSolid
  18. 21prompts.chat - AI Prompts CommunityAI Appprompts.chat is a free and open-source platform for discovering, collecting, and sharing AI prompts. It serves as a community hub for AI prompt engineers and creators, supporting ChatGPT, Claude, Gemini, and more.38ToolRankEmerging
  19. 22MakePromptAI AppMakePrompt is a free AI prompt generator and optimizer that helps users create, edit, and reuse AI prompts. It offers features like reusable inputs, Markdown editing, and a prompt library, making it easy to generate clear instructions for AI models.37ToolRankEmerging
  20. 23IMI Prompt Midjourney GeneratorAI AppIMI Prompt is a Midjourney v5 prompt generator offering thousands of options across web, Android, and iOS. It simplifies creating unique AI art by providing a user-friendly interface and up-to-date compatibility with the latest Midjourney versions, enabling users to express their artistic vision effortlessly.36ToolRankEmerging
  21. 2416x PromptAI App16x Prompt enhances AI coding by managing code context and optimizing prompts for complex tasks. It integrates with multiple LLM APIs, offers structured prompt creation, and features code editing with visual diffs. Ship quality code faster with this desktop application.36ToolRankEmerging
  22. 25Promptly AIAI AppPromptly AI is a browser extension and API playground designed to enhance AI interactions. It helps users craft better prompts, provides access to a curated library of prompt templates, and enables seamless export of conversations across major AI services like ChatGPT, Claude, Perplexity, Gemini, and Deepseek. This tool aims to optimize AI responses and workflow.35ToolRankEmerging
  23. 26MotionSitesAI AppA library of premium AI website prompts and animated background templates for tools like Lovable, Bolt, Cursor, and Claude, plus an extension to copy any website's design.35ToolRankEmerging
  24. 27W&B WeavePlatformW&B Weave enhances observability for production agents, enabling them to learn and improve from real-world experiences. This tool helps maintain reliability and performance in AI applications through continuous monitoring and evaluation.34ToolRankEmerging
  25. 28Snack PromptAI AppSnack Prompt is an AI prompt marketplace where users can discover, share, and remix prompts for AI images, text, and automations. It serves as a central hub for prompt engineers and AI builders to collaborate and find creative solutions. The platform features a library of prompts categorized by various AI applications and topics.33ToolRankEmerging
  26. 29Prompt CowboyAI AppPrompt Cowboy is a tool that optimizes prompts for AI models like ChatGPT, Claude, and Gemini. It transforms rough ideas into clear, high-performing prompts, enhancing AI interactions without requiring expertise in prompt engineering.33ToolRankEmerging
  27. 30PrompTessorAI AppAn AI prompt workspace to generate, analyze, optimize, refine, and reverse-engineer prompts, with scoring metrics and a reusable prompt library that works across major AI models.33ToolRankEmerging
  28. 31vibe-pilotAI Appvibe-pilot is a context optimizer for AI engineers that prunes codebase files into a hyper-focused .context file. It significantly reduces token count for AI prompts, cutting costs and improving model efficiency. Designed for local execution with zero dependencies, it integrates with popular AI coding assistants like Cursor and Claude Code, ensuring lean context windows without manual intervention.33ToolRankEmerging
  29. 32Orq.aiAI AppOrq.ai is a comprehensive platform designed for building, deploying, and managing AI applications. It offers a secure environment for developing and monitoring generative AI solutions, ensuring control and scalability throughout the lifecycle.32ToolRankEmerging
  30. 33HeadroomAI AppHeadroom is a desktop application for macOS, Windows, and Linux that optimizes inputs for Claude Code and ChatGPT Codex. It compresses repetitive tool output, logs, and boilerplate locally to reduce token costs by approximately 50%. This allows developers to extend their AI coding sessions and get up to twice as much usage from their existing subscription plans, ensuring privacy by keeping prompts on-device.32ToolRankEmerging
  31. 34Maxim AI: GenAI Evaluation PlatformAI AgentMaxim AI is an end-to-end evaluation and observability platform designed for AI teams. It helps users simulate, evaluate, and monitor AI agents, enabling faster and more reliable deployments. The platform offers features like prompt engineering, agent simulation, and real-time monitoring, streamlining the AI development lifecycle.32ToolRankEmerging
  32. 35Pretty PromptAI AppPretty Prompt is an AI prompt enhancer for ChatGPT, Claude, Gemini, and more that turns rough ideas into clear, structured prompts in one click, available as a browser extension and web app.32ToolRankEmerging
  33. 36Promptsref AI Prompt LibraryAI AppPromptsref is an AI workspace offering curated prompt libraries, visual references, and generation tools. It helps creators find inspiration, skip blank prompts, and generate better AI images and videos using leading AI models. Discover reusable workflows and smart visual search.32ToolRankEmerging
  34. 37LatitudeAI AppAn open-source AI agent observability and monitoring platform that traces agents in production, surfaces failures, and dispatches coding agents to fix them automatically.31ToolRankEmerging
  35. 38Prompt BlazePrompt Blaze is a Chrome extension that simplifies AI prompt chaining for tasks on any website. It allows users to store, execute, and automate AI workflows with LLM models like ChatGPT and Claude without needing API access. Enhance productivity by integrating AI into your daily web browsing.31ToolRankEmerging
  36. 39Prompt GenieAI AppPrompt Genie enhances Claude Code by providing context memory, preventing redundant file re-reading and reducing costs. It centralizes prompt management, offers version control, and enables team collaboration, ensuring prompts are effective and reusable across major LLMs.31ToolRankEmerging
  37. 40PromptStorm - ChatGPT PromptsPromptStorm is a free Chrome extension offering a vast library of expertly crafted prompts for ChatGPT, Gemini, and Claude. Enhance your AI interactions to learn, master productivity, excel in marketing, develop projects faster, and gain expert advice across various domains. Unlock AI's full potential with ease.30ToolRankEmerging
  38. 41Image to Prompt GeneratorAI AppImage to Prompt Generator is a free tool that converts images into detailed AI prompts for platforms like Midjourney and Stable Diffusion. It offers unlimited use without requiring sign-up, ensuring privacy by not storing uploaded images.30ToolRankEmerging
  39. 42Powerusers MidJourney Prompt GeneratorAI AppPUMPG is an interactive AI prompt generator for Midjourney. It helps users build complex prompts by offering a structured interface for various parameters, including text, negative prompts, model versions, aspect ratios, and advanced settings like style and character references. The tool aims to simplify prompt creation, foster creativity, and save time for users.30ToolRankEmerging
  40. 43teleprompt AIteleprompt AI is a Chrome extension that enhances and crafts AI prompts instantly for tools like ChatGPT, Claude, and Gemini. It offers one-click improvements for existing prompts and guided generation for new ones, saving users time and improving AI response quality across multiple platforms.30ToolRankEmerging
  41. 44GPTPromptMakerAI AppGPTPromptMaker is a comprehensive AI prompt generator offering over 500 structured templates for ChatGPT, Claude, and Gemini. It enables users to create custom prompts using proven frameworks, ensuring consistent and professional-grade AI outputs.29ToolRankEmerging
  42. 45Langtail Prompt ManagementAI AppLangtail is a prompt management platform designed for product teams to build, test, and deploy AI prompts collaboratively. It streamlines AI workflows with version control and seamless deployment, making AI prompt engineering accessible without coding. The platform offers data-driven insights and security features to control LLM output.29ToolRankEmerging
  43. 46PromptFolderAI AppPromptFolder is an AI prompt manager for building, saving, and discovering prompts to use with ChatGPT, Midjourney, and other AI-powered tools.29ToolRankEmerging
  44. 47Promptmetheus: Prompt Engineering IDEAI AppPromptmetheus is a Prompt Engineering IDE that allows users to compose, test, and optimize prompts for LLM-powered applications. It supports over 100 models, prompt versioning, and automatic evaluations, making it a versatile tool for developers and AI enthusiasts.29ToolRankEmerging
  45. 48AIPRM for ClaudeAIPRM for Claude enhances your interaction with Claude by providing a curated library of over 4500 professional 1-Click Prompts. It streamlines content generation for various tasks, from SEO articles to sales emails, and offers advanced features for prompt management and customization, helping users maximize Claude's potential.29ToolRankEmerging
  46. 49easy-datasetGitHub RepoEasy-dataset is a tool designed to streamline the creation of datasets for LLM fine-tuning, RAG, and evaluation. It simplifies the process of preparing data, making it accessible for developers and researchers working with large language models.29ToolRankEmerging
  47. 50AI Prompt ArchitectAI AppAI Prompt Architect is a free platform for engineering, testing, and optimizing AI prompts. It supports major models like ChatGPT, Claude, and Gemini, utilizing the STCO framework. The platform offers over 500 templates, prompt scoring, and team collaboration features, enabling users to build production-grade prompts efficiently. It also provides advanced tools for enterprise-grade compliance and security.29ToolRankEmerging
  48. 51Promptsideas - AI PromptsAI AppPromptsideas is a marketplace for AI prompts, offering a wide variety of prompts for DALL-E, Midjourney, Stable Diffusion, ChatGPT, and more. Users can buy and sell prompts, improve their prompt engineering skills, and monetize their AI creations. It serves as a hub for creative collaboration and AI-driven entrepreneurship.29ToolRankEmerging
  49. 52Video to PromptAI AppVideo to Prompt is an AI-powered generator that converts any video into high-quality AI prompts. It analyzes visual elements, composition, lighting, and cinematic style scene-by-scene to create ready-to-use prompts. Compatible with leading AI creative tools like Midjourney, Stable Diffusion, DALL-E, and Sora, it streamlines content creation for filmmakers, marketers, and artists.28ToolRankEmerging
  50. 53Prompt BoardMobile AppPrompt Board is a powerful AI prompt management tool that allows users to manage, edit, and share prompts across various AI models. It offers seamless integration with iOS devices, enabling prompt access directly from the keyboard for enhanced creativity and productivity.28ToolRankEmerging
  51. 54PromptyAI AppPrompty is an AI-powered tool that enhances your interactions with AI models like ChatGPT. It refines your prompts to ensure you receive more precise and relevant responses, saving you time and improving the quality of AI-generated content. Ideal for professionals seeking to maximize their AI subscription.28ToolRankEmerging
  52. 55JumboGPT - Bulk PromptsJumboGPT is a Chrome extension designed to streamline your ChatGPT interactions. It allows you to run thousands of prompts in bulk, import prompts via CSV, and automatically complete lengthy responses. Export your results in CSV or Excel formats for efficient data analysis and enhanced productivity.28ToolRankEmerging
  53. 56Mostrador, Kit IA PymeCourseMostrador's Kit IA Pyme offers AI prompts and guides for small businesses and freelancers in Spain. It includes prompts for reviews, client emails, budgets, social media, and office tasks, compatible with ChatGPT, Gemini, or Copilot.28ToolRankEmerging
  54. 57S1 StudioAI AppS1 Studio is an open-source web UI sandbox designed for vendor-neutral structured decision models. It supports TypeSafe Jev, Ollama clef, and custom endpoints, allowing users to construct decision questions and evaluate results efficiently.28ToolRankEmerging
  55. 58tokentrimAI Apptokentrim optimizes Claude Code usage by reducing history re-reads by 75%, extending usage limits up to 4 times. It's a free, open-source tool that operates locally, ensuring privacy and efficiency.28ToolRankEmerging
  56. 59UltraRAGGitHub RepoUltraRAG is a low-code MCP framework designed to build complex and innovative RAG pipelines. It simplifies the process of creating robust AI-driven solutions, making it accessible for developers to implement advanced AI functionalities.27ToolRankEmerging
  57. 60AI Prompt GeniusAI AppAI Prompt Genius is a browser extension that helps users discover, share, and use the best ChatGPT prompts. It allows customization with themes and syncs across devices for free, enhancing the ChatGPT experience.27ToolRankEmerging
  58. 61Prompt LlamaAI AppPrompt Llama is a platform for discovering and testing text-to-image prompts across various AI models. It allows users to gather high-quality prompts and compare the performance of different AI image generation engines using the same inputs, aiding in prompt engineering and model evaluation.27ToolRankEmerging
  59. 62Prompt ManagerPrompt Manager is a Chrome extension designed to help users organize and reuse prompts for various AI tools like ChatGPT, Midjourney, and Dall-E. It allows for one-click saving, easy copying, sorting into folders, and quick searching, enhancing productivity by ensuring prompts are never lost and readily accessible.27ToolRankEmerging
  60. 63Image PromptAI AppImage Prompt offers AI-powered tools to master image prompt creation for AI art generators like Midjourney, Flux, and Stable Diffusion. Transform ideas into detailed prompts, generate stunning AI art, and understand any image with descriptive AI analysis. Enhance your creative process and streamline AI-driven design efficiency.27ToolRankEmerging
  61. 64Midjourney Prompt HelperThis Chrome extension acts as a prompt generation assistant for Midjourney, an AI drawing tool. It helps creators, from beginners to pros, by generating prompts to guide their artistic process, saving learning time and boosting drawing efficiency. It aims to inspire new ideas and refine creative output.27ToolRankEmerging
  62. 65OmniCharAI AppOmniChar is a free and open-source tool for creating consistent AI characters across various models. It uses a single .char file to maintain character consistency, allowing seamless integration with models like FLUX.2, MiniMax H3, and Krea 2.26ToolRankEmerging
  63. 66ChatPromptGeniusAI AppChatPromptGenius is a free AI prompt generator that creates expert-level prompts for various AI models like ChatGPT, Claude, and Gemini. Simply describe your need, select an AI model, and receive a structured, optimized prompt instantly. It offers model-specific optimization and one-click copying for seamless integration into your AI workflows.26ToolRankEmerging
  64. 67SrefHunt Midjourney PromptsAI AppSrefHunt is a community-driven platform for Midjourney users to discover, collect, and share SREF codes and creative prompts. It offers a library of curated styles, a prompt-to-image generator, and tutorials, fostering collaboration among AI art enthusiasts.26ToolRankEmerging
  65. 68TopFreePromptsAI AppTopFreePrompts is a large library of professional AI prompts for ChatGPT, Claude, Midjourney, Gemini, Grok, and other tools, spanning writing, marketing, coding, images, and video, with free prompts and a one-time Lucy+ license for the full library.26ToolRankEmerging
  66. 69MusicPromptProAI AppMusicPromptPro is a free AI music prompt generator, lyrics workspace, and searchable prompt library designed for creators. It helps users refine rough musical ideas into structured, copy-ready prompts for various text-to-music workflows like Suno and Udio. The platform also assists in drafting lyrics and building style tags, ensuring clearer direction before music generation.26ToolRankEmerging
  67. 70PromptBrosAI AppAn AI Interaction Management System and marketplace to discover, create, test, and share prompts and agents, using leading GenAI models in a single click with pay-as-you-go credits.26ToolRankEmerging
  68. 71inspeq aiinspeq ai is a Chrome extension designed to help users evaluate the accuracy and robustness of AI-generated content from popular LLM applications. It provides real-time metrics and insightful scores, empowering users to make informed decisions about AI outputs. The extension supports major AI chat platforms, enhancing user confidence in AI interactions.26ToolRankEmerging
  69. 72PromptGPTPromptGPT is a Chrome extension designed to enhance your ChatGPT experience by allowing you to easily save, load, edit, and search your favorite prompts. It eliminates the need for repetitive copy-pasting, streamlining your workflow and saving you valuable time when interacting with OpenAI's ChatGPT.26ToolRankEmerging
  70. 73PromptSpendAI AppPromptSpend is a free, open-source LLM API cost calculator that helps users estimate and compare the cost of AI features across 126 models from 16 providers. It re-checks pricing daily, allowing users to paste prompts or sketch workloads to see side-by-side cost comparisons, including advanced assumptions for caching and batch APIs. Available as a web calculator and mobile apps.25ToolRankEmerging
  71. 74Promptitude.ioAI AppPromptitude.io enables seamless integration of GPT into your SaaS and mobile applications. Manage, test, and enhance your prompts effortlessly with a single API call, ensuring personalized results that reflect your brand's voice and style.25ToolRankEmerging
  72. 75Vidura - Prompt ManagerAI AppVidura is a prompt management system for generative AI, allowing users to create, run, organize, share, and export text and image prompts and their responses. It simplifies prompt iteration and response refinement, acting as a productivity tool for AI users.25ToolRankEmerging
  73. 76GPT-PrompterAI AppGPT-Prompter is a Chrome extension that integrates GPT-3, GPT-4, and ChatGPT API directly into your browsing experience. It allows for quick, convenient use of AI models from any webpage without leaving your current site or using intermediaries, saving time and effort.25ToolRankEmerging
  74. 77GuessPromptAI AppGuessPrompt offers a gamified approach to mastering AI prompting. Engage in daily reverse-engineering challenges to decode AI-generated art and text. Compete on leaderboards, challenge friends, and enhance your prompt engineering skills through interactive puzzles and creative problem-solving.25ToolRankEmerging
  75. 78RepomixGitHub RepoRepomix is a tool that compiles your entire repository into a single, AI-friendly file. It is ideal for integrating codebases with Large Language Models (LLMs) and other AI tools like ChatGPT and Claude.25ToolRankEmerging
  76. 79Agent PurgeGitHub RepoAgent Purge is a tool that allows users to replace or inject system prompts across various coding agents like Codex, Claude, and others. It offers a local web console for managing these prompts, enhancing the flexibility and control over AI coding agents.25ToolRankEmerging
  77. 8099x PromptsAI App99x Prompts offers a comprehensive library of over 50,000 AI prompts, including 12,500 personally tested prompts for various AI models like Claude, GPT-4.5, and Midjourney. It provides users with reliable prompt engineering for text, image, and video generation.24ToolRankEmerging
  78. 81thisorthis.aiAI Appthisorthis.ai allows users to compare over 50 AI models, including GPT-4o, Claude, and Gemini, side-by-side. It offers organized workspaces, a prompt library with expert-crafted prompts, and image generation capabilities, all within a single platform for making smarter AI decisions. Start for free.24ToolRankEmerging
  79. 82PromtistAI AppPromtist is an AI prompt generator that turns a described task into an optimized, task-specific prompt for ChatGPT, Claude, Gemini, and other models, with version control, comparison, and a reusable prompt library.24ToolRankEmerging
  80. 83Imaginebuddy AI PromptsAI AppImaginebuddy is a library of AI prompt recipes for product photography, built for e-commerce brands that want campaign-ready images without a physical photoshoot. Users upload a product photo and paste one of the tested prompts into Midjourney, Gemini, or ChatGPT to generate studio, lifestyle, or advertising-style visuals. Premium access is $3 per month.24ToolRankEmerging
  81. 84PromptPandaAI AppPromptPanda is an AI prompt management system designed for marketing teams. It centralizes, organizes, tags, and shares prompts to ensure brand consistency, streamline workflows, and enhance team collaboration. Features include prompt quality improvement, flexible variables, and cross-platform accessibility. Try it free.24ToolRankEmerging
  82. 85Prompt Token CounterAI AppThis online tool helps users count tokens for OpenAI models, ensuring prompts fit within model limits. It aids in optimizing prompt length for cost control and effective communication with AI, preventing rejections due to excessive token usage. Essential for efficient interaction with models like GPT-3.5.24ToolRankEmerging
  83. 86LaPromptAI AppLaPrompt is a marketplace for AI prompts, offering a curated selection of verified prompts for text, image, video, audio, 3D, and app generation. Discover, purchase, and sell prompts across various AI models, empowering creators and buyers to achieve predictable, high-quality results efficiently.24ToolRankEmerging
  84. 87PromptaaAI AppPromptaa is a free AI prompt generator and prompt library that creates, enhances, and organizes prompts for ChatGPT, Claude, and other AI tools, with categories, search, sharing, and unlimited personal storage.24ToolRankEmerging
  85. 88Top RoadAI AppTop Road empowers GPT creators to monetize their custom GPTs within the OpenAI GPT Store. It offers features like subscription paywalls, email capture for lead generation, and whitelisting for controlled access. Installation is free and requires no coding, backed by Y Combinator.23ToolRankEmerging
  86. 89Video BreakdownAI AppVideo Breakdown converts videos into AI-ready prompt packs, extracting scene summaries, camera language, style, motion, and editing notes. It supports both video uploads and public links, offering a free trial with daily quotas.23ToolRankEmerging
  87. 90ImaginPromptAI AppImaginPrompt is an AI image-to-prompt generator that reverse-engineers any image into a model-specific prompt for Midjourney, DALL-E, Stable Diffusion and Flux, with automatic negative prompts and a free daily tier.23ToolRankEmerging
  88. 91vibecodepromptsAI Appvibecodeprompts is an AI prompt generator for vibe coding tools that turns ideas into structured, tool-specific prompts for Lovable, Bolt, Replit, Claude Code, and V0 to save AI credits and ship apps faster.23ToolRankEmerging
  89. 92OpenPromptAI AppOpenPrompt is a dedicated workspace for engineering high-performance prompts, powered by Groq for fast inference. It offers multilingual capabilities and ensures privacy with zero data persistence, making it ideal for optimizing AI interactions.23ToolRankEmerging
  90. 93Loop EngineeringGitHub RepoLoop Engineering provides practical patterns, starters, and CLI tools for AI coding agents. It helps design systems to prompt and orchestrate agents, inspired by Addy Osmani and Boris Cherny. Key tools include loop-audit, loop-init, and loop-cost.23ToolRankEmerging
  91. 94PerryAI AppPerry is a prompt improvement tool designed to refine rough prompts for AI models like ChatGPT, Claude, and Gemini. It offers a free tier with limited weekly usage and a Pro plan for unlimited access. Perry ensures AI understands prompts correctly, reducing follow-ups and enhancing efficiency.22ToolRankEmerging
  92. 95ContextIQAI AppContextIQ provides a suite of AI context engineering and agentic commerce tools. It helps visualize memory architectures, compare LLM token costs, inspect OpenID Connect configurations, and gate AI agent payments. Engineers can debug RAG chunking, map agent workflows, and verify x402 and ERC-8004 payments, ensuring AI agents operate with evidence and trust.22ToolRankEmerging
  93. 96La PrompterieAI AppLa Prompterie is a marketplace offering a wide range of tested and verified AI prompts in both French and English. It supports popular AI tools like ChatGPT, Claude, and Midjourney, helping users save time and achieve professional results.22ToolRankEmerging
  94. 97RevalvoAI AppRevalvo is a local-first LLM evaluation workbench that allows users to run prompts on multiple models simultaneously. It offers real-time scoring, version control, and a distraction-free interface, all without requiring an account or hosted database.22ToolRankEmerging
  95. 98SkyLabAI AppSkyLab is a collaborative workspace designed for teams to author, review, and version production-grade AI prompts and skills. It centralizes prompt management, offering AI-assisted drafting, on-demand review processes, and full version history. Teams can promote trusted versions to live, ensuring consistency and reliability across AI applications while eliminating scattered documents and guesswork.22ToolRankEmerging
  96. 99Timi AIAI AppTimi AI is a free AI image prompt gallery with 10,000+ curated templates for Nano Banana, ChatGPT, Midjourney, and more, letting users copy prompts and generate images across multiple models in one click.22ToolRankEmerging
  97. 100Izlo - Prompt Control for TeamsAI AppIzlo offers a comprehensive platform for managing AI prompts, enabling teams to store, improve, test, and deploy prompts efficiently. It enhances collaboration and productivity by providing tools like version control, testing suites, and APIs.21ToolRankEmerging

Quick picks

Best overallLangChain#1Open-source frameworks plus evaluation, observability and deployment tools cover the full lifecycle of building and testing AI agents.
Best free prompt libraryprompts.chat#2A free, open-source prompt library with a 25+ chapter prompt engineering guide, a CLI and self-hosting for private company libraries.
Best for prompt versioningLangfuse#3Separates prompts from code with one-click deploys and rollbacks, and tests prompts on real production inputs across models.
Best for red teamingPromptfoo#5Red-teams your AI app automatically inside CI/CD pipelines, with custom attack profiles and clear remediation guidance.
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Editor's round-up

This board covers software for writing, testing, managing and finding prompts, from developer frameworks to prompt marketplaces. LangChain leads with a ToolRank of 72 and supports building, evaluating and deploying agents. prompts.chat takes third as a huge open-source prompt library with a free guide to prompt engineering.

For production teams, Langfuse and PromptLayer manage prompt versions, run evaluations and track cost and latency. Promptfoo red-teams AI apps for security flaws. Portkey and Helicone AI Gateway route requests and watch usage. DSPy takes a different path. You program language models in Python, and its optimizers tune prompts automatically against a metric.

If you just want better prompts, PromptBase AI Prompt Marketplace sells over 270,000 of them. PromptHero collects image and video prompts, and AIPRM adds 4,000+ prompts for ChatGPT users. Fabric AI Framework takes a community angle, with an open-source, crowdsourced set of prompts for everyday problems.

Pick by role. Developers should start with LangChain or Langfuse, and everyday users should browse prompts.chat first.

How to choose AI prompt engineering tools

  1. Separate prompts from code

    Hard-coded prompts are painful to change. Langfuse and PromptLayer store prompts outside your code, with versioning, deployments and rollbacks you can manage from one place.

  2. Test before you ship

    A tweak that fixes one case can break others. PromptLayer runs A/B and regression tests, and LangWatch turns production traces into evaluations to prevent regressions.

  3. Red-team for security

    Prompts can be attacked as well as improved. Promptfoo runs automated red teaming in CI/CD pipelines and gives remediation guidance for each weakness it finds.

  4. Pick libraries by model

    Prompt libraries target different models. PromptHero focuses on image and video prompts, while AIPRM targets ChatGPT and prompts.chat works with several chat models.

Frequently asked questions

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