Email marketing
SendLint
Autonomous QA agent for email that checks copy, links, images, accessibility and brand guidelines, then issues a certificate anyone can verify
SendLint checks every email against approved assets including copy deck, links, alt text and creative, then mints verifiable certificates for approved rounds.
Overview
The SendLint homepage
SendLint is an autonomous QA agent for email that reads your copy deck and approved creative, then checks copy, links, images, accessibility, metadata, spam, rendering and brand guidelines in one pass. It validates copy against the deck in every language including words inside pictures, follows links and tracking parameters to verify they land correctly, checks WCAG accessibility standards, Outlook rendering, spam signals and brand rules. When a round passes all checks, SendLint issues a certificate with a public page anyone can open to verify it against the exact HTML that was approved. The tool hands each defect to the person who fixes it and keeps records for compliance, including every check that ran, every finding and its evidence, and every waiver with who made it and when.
Capabilities
- Copy vs Deck Alignment - reads copy deck and holds email to it line by line in both directions
- Link Validation - opens every URL, follows tracking wrappers to actual landing page, checks destination against deck
- Creative Comparison - checks built email block by block against approved PDF, PNG, JPG or XD
- Real Outlook Rendering - renders every email in real Outlook 365 on Windows in light and dark mode
- Accessibility (WCAG 2.1) - 25 accessibility checks including contrast, alt text, heading structure, reading order
- SendLint Approved Certificates - mints certificate for each email and language with public verification page
- Compliance PDF and Audit Log - keeps every report, check, approval, override and waiver with who, when and reason
- Dynamic content with personalization tokens - placeholders resolve against test values to verify exactly
Pricing
Pricing model: Paid
Team: $299 per Member per month (2 clients, 30 emails); Pro: $988 per month (unlimited clients and emails). One paid Member seat unlocks full team access; Reviewer and Client viewer seats are free on every plan.
Follow SendLint to get an email when they post a milestone, ship a new product or add a demo video.
SendLint fact sheet
| Community votes | 0 |
|---|---|
| Founded | 2026 |
| Stage | Startup |
| Based in | Toronto, Canada |
| Website | sendlint.com |
SendLint metrics
Vendor metrics for sendlint.com: Ahrefs Domain Rating and Majestic link data, with the delta since the last review.
- Domain Rating
- 0
- no change since last check
- Trust Flow
- 0
- no change since last check
- Citation Flow
- 19
- no change since last check
- Referring domains
- 4
- no change since last check
- External backlinks
- 6
- no change since last check
Vendor Domain Rating (Ahrefs) checked 6 Nov 2026, spec changed 4 Nov 2026. Vendor Majestic data checked 4 Nov 2026, spec changed 4 Nov 2026. Link metrics supplied by Majestic. Trust Flow, Citation Flow and Topical Trust Flow are trademarks of Majestic-12 Ltd.
SendLint vendor domain
Open the vendor record
We read this from the registry's RDAP record on 5 Nov 2026, 20:01 UTC.
- Domain age
- 7 months
- Registered
- Expires
- Registrar
- NameCheap, Inc.
- DNSSEC
- Not signed
SendLint post-launch report
| Measure | At launch, then latest |
|---|---|
| Domain Rating (Ahrefs) | 0 to 0 no change since launch 4 Nov 2026, then 5 Nov 2026 |
| Trust Flow (Majestic) | 0 first measured 4 Nov 2026 |
| Referring domains (Majestic) | 4 first measured 4 Nov 2026 |
Day 1 since launch. Next receipt: day 30, 4 Dec 2026. Many things move these figures, so a change is not proof of cause. Only stored readings are shown.
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Buyer questions
Why is it called SendLint?
Lint, as in a linter. A code linter reads the source and lists what is wrong, line by line. SendLint is a linter for marketing email: it reads the HTML, the copy deck and the approved design, then lists every line of copy that drifted, every link that lands on the wrong page or carries the wrong tracking code, and every accessibility or rendering fault. When a round is clean, it signs off.
Does SendLint work with my ESP?
SendLint takes the HTML or .eml you would send from any ESP, so nothing changes in your sending setup. Teams that automate their builds use the REST API and get the same reports in Slack.
Which languages does SendLint read?
Any language the campaign ships in. The deck is read per language, including right-to-left layouts, and the AI Agent reads the words that only exist inside the pictures. Each language gets its own report and its own sign-off.
What is a SendLint certificate?
When a round passes, SendLint mints a certificate for that email and that language, with a public page anyone can open to verify it against the exact HTML that was approved. It is the sign-off you hand to the client, and it stops meaning approved the moment the file changes.
What does SendLint check?
Copy against the deck in every language the campaign ships in, including the words that only exist inside the pictures. Links and tracking parameters, followed through the tracker to where they land. WCAG accessibility, Outlook rendering, spam signals and your own brand rules. Then the built email against the approved creative, block by block.
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SendLint has a free listing. The owner can unlock the full profile with a paid launch for $5:
- Founder story (locked)
- Milestones (locked)
- Demo video (locked)
- Dofollow website link (locked)
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