| What it does | Email validation platform with credits that never expire and advanced catch-all resolution
| Autonomous QA agent for email that checks copy, links, images, accessibility and brand guidelines, then issues a certificate anyone can verify
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| Stage | Not given
| Startup
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| Founded | Not given
| 2026
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| Based in | Not given
| CA
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| Pricing model | Not given
| Paid
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| Pricing | Free plan with 100 validations. Pay-as-you-go credits: $1.40 per 1k emails (up to 10k), $1.10 per 1k (up to 50k), $0.90 per 1k (up to 250k), $0.70 per 1k (up to 1M). Unlimited plans: 3-month commitment $999/month ($2,997 billed upfront), 6-month commitment $899/month ($5,394 billed upfront), 12-mont
| 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.
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| Key features | - SMTP validation and domain verification
- Catch-all domain resolution with enhanced validation
- Duplicate email removal
- Real-time API and webhooks
- Advanced reporting and list health insights
- MCP server for AI agents and Claude integration
- Chrome extension for browser-based validation
- Integrations with Mailchimp, HubSpot, Zapier, Make, and more
- SDK libraries for JavaScript, Python, Ruby, PHP, Go, Java, and .NET
| - 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
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| What makes it different | - Credits that never expire, no subscription lock-in
- Up to 2x more accurate results than competitors on catch-all domains
- Fair, transparent pricing with no surprise overages
- Built by email industry veterans from ConvertKit
| - Autonomous agent that signs off on emails with verifiable certificates, not just approvals
- Checks whether what you built matches what the client approved, not just how it looks
- Hands each defect to the person who fixes it with exact quotes from deck and email
- Real Outlook rendering on actual Windows machines, not a simulation
- Works with any ESP - takes HTML or .eml you would send from any platform with no setup changes
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 50 ▲ +1 (up) since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 22 | 0 |
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| Citation Flow (Majestic) | 43 | 19 |
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| Referring domains (Majestic) | 708 | 4 |
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Truelist
SendLint