SendCheckIt
16-point email subject line tester and deliverability grader
pricingfree tierapichecked 22 Aug 2026
What SendCheckIt is
SendCheckIt runs a 16-point diagnostic check on email subject lines, evaluating scannability, reading grade level, spam trigger density, sentiment polarity, and mobile inbox previews. It provides email marketers with immediate scores and tactical copy adjustments to improve open rates across desktop and mobile email clients without requiring expensive consulting.
Pricing
| Plan | Price | Annual | What you get |
|---|---|---|---|
| Free Checker | Free | — | Standard 16-point subject line analysis, mobile preview simulator |
| Pro Suite | $19/mo | $15/mo | Unlimited historical reports, AI headline generator, team sharing |
Single simple upgrade tier with unlimited testing.
Free access: Completely free web subject line grading tool
read from the vendor pricing page · 22 Aug 2026 · how we verify
Best for
- Newsletter creators polishing subject lines before sending
- Marketers wanting fast, actionable email copy feedback
Not for
- Enterprise data warehouse ETL routing
Integrations
SendCheckIt alternatives
All 4 alternatives to SendCheckIt, compared Get the Toolvern badge for SendCheckIt
SubjectLine.com Email subject line rating tool and AI copy optimization assistant 
TestSubject Mobile email subject line and sender name preview simulator 
Touchstone Predictive email subject line testing and open rate simulation engine 
Phrasee AI subject line optimization and language generation for enterprise email marketing Head to head: SendCheckIt vs SubjectLine.com SendCheckIt vs TestSubject SendCheckIt vs Touchstone SendCheckIt vs Phrasee
Compiled by Stepan Noianov from the vendor's own site and pricing page. Something wrong? Report an inaccuracy.