SendLint autonomously checks your email against the source deck, accessibility standards, links, rendering, spam triggers, and brand voice — in one pass.
Stop juggling 5 tools. SendLint runs copy alignment, accessibility, links, rendering, spam, and brand voice in a single autonomous pass.
Upload your source deck alongside the email. AI cross-references key messages, CTAs, stats, and claims — flagging anything that drifted.
Automated scan for contrast ratios, alt text, heading hierarchy, font sizes, table roles, and screen reader compatibility.
Every URL crawled and verified. Broken links, redirect chains, UTM consistency, and unsubscribe compliance — all checked.
Real screenshot of every email. Compare round-over-round with pixel-level diffs and an Outlook-risk overlay that flags border-collapse seams, missing VML fallbacks, and GIF strip-down before send.
Content-based spam scoring, image-to-text ratio analysis, blocklist checks, and authentication readiness.
Upload 3-5 reference emails. Every new email is scored on tone, vocabulary, structure, and formality against your brand's actual voice.
Paste any email’s HTML, see what SendLint catches. No account, no card.
Open the demo →Paste your email HTML and upload the source deck. Select your client and campaign version.
SendLint runs 100+ checks autonomously — copy, accessibility, links, brand rules, and more.
Review flagged issues with actionable guidance. Export the report as .docx and send with confidence.
| Feature | SendLint | Litmus | Email on Acid |
|---|---|---|---|
| Copy vs Deck Alignment | |||
| Brand Voice AI | |||
| Accessibility Checks | |||
| Link Validation | |||
| Visual Rendering Analysis | |||
| Spam Scoring | |||
| All-in-One Pass | |||
| .docx Report Export |
One plan with everything you need. Enterprise options for teams that need more.
For teams shipping production emails
Billed annually at $1,548/yr
For teams with advanced needs
Tailored to your organization
Built by QA engineers who were tired of checking emails by hand.
Every check in SendLint exists because we've seen it cause a real issue in production.
Start linting your emails with autonomous, all-in-one QA.
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