Description
SendLint is an autonomous quality assurance agent designed specifically for marketing emails. It automates the rigorous checking process against approved assets, including copy decks, creative designs, links, and brand guidelines. The platform aims to prevent critical errors that often slip past human checklists, such as incorrect promotional rates, missing legal disclosures, or silently broken links, which can lead to compliance issues, campaign failure, and reputational damage.
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The tool operates by reading the email's HTML, the approved copy deck, and the design files (PDF, XD, PNG, JPG). It then performs a comprehensive suite of checks in a single pass. These checks include copy-to-deck alignment in any language, link validation with tracking-wrapper destination verification, WCAG 2.1 AA accessibility audits, real desktop Outlook rendering, spam and deliverability scoring, and brand voice analysis. For every successful QA round, SendLint mints a publicly verifiable certificate, binding the approved email to its exact bytes, providing undeniable proof of compliance.
SendLint is particularly beneficial for agencies, QA analysts, and regulated brands. Agencies can maintain per-client brand rules and ensure every version and language of a campaign is checked against approved assets, reducing remediation sends and client calls. QA analysts benefit from line-by-line verification that catches subtle errors a tired eye might miss, with findings tracked round-over-round. Regulated brands gain a verifiable record of every check, finding, waiver, and approval, crucial for internal audits and regulatory compliance.
The platform's AI Agent enhances its capabilities by reading words within images, writing code fixes, reviewing emails as a second pair of eyes, and answering campaign-specific questions from its reports. It can also apply fixes to the HTML and re-check them before acceptance. SendLint integrates seamlessly into existing workflows, accepting HTML or .eml files from any Email Service Provider (ESP) and delivering reports to client portals, Slack, or via its REST API.
Pricing is structured with Team and Pro plans, offering different levels of client and email capacity, with unlimited free Reviewer seats. The Pro plan includes advanced features like AI Code Revision, AI Second Reviewer, AI Brand Voice analysis, and real desktop Outlook renders. An Enterprise plan is available for regulated programs and large agencies, offering SSO, two-party approval, security reviews, and priority support.
- CategoryAI Email Marketing Tools
- Pricing ModelFreemium
- DeploymentCloud
- PlatformsWeb
SendLint's Core Features
Automated Email QA against approved assets
Copy deck alignment in any language, including words in images
Link validation with tracking-wrapper destination verification
WCAG 2.1 AA accessibility audit (25 checks)
Real desktop Outlook (Word engine) rendering
Spam and deliverability scoring with client-defined thresholds
Creative comparison against approved PDF/XD, block by block
Brand voice analysis against reference emails
SendLint Approved certificates with public byte-for-byte verification
AI Agent for fix writing, re-checking, and second review
Per-client brand rules and product codes
Support for 36 languages, including right-to-left layouts
API access and pre-send gate for workflow integration
Unlimited free Reviewer seats on all plans
Two-party approval for compliance-strict clients (Enterprise)
How to use SendLint?
Upload Email: Paste the email HTML or upload the .eml file, along with the copy deck and approved creative.
Select Client Rules: Pick the client whose predefined brand rules and standards apply to the email.
Run Checks: SendLint performs 100+ checks in one pass, covering copy, links, images, accessibility, spam, rendering, and brand guidelines.
Review Findings: Examine the detailed report, which quotes evidence for every finding and suggests fixes.
Fix & Revalidate: Hand the developer the brief or use the AI Agent to apply fixes; re-run checks on the updated HTML.
Ship with Confidence: Once clean, sign off per language, and SendLint mints a verifiable certificate for approval.
SendLint's Use Cases
- Email Campaign QA
- Compliance Verification
- Brand Consistency Enforcement
- Accessibility Auditing
- Link & Tracking Validation
- Outlook Rendering Assurance
- Spam Risk Assessment
- Creative vs. Build Comparison
- Multi-Language Campaign QA
- Automated Code Fixes
