Vetted & Ranked
Best Vetted AI Email Writing Assistant Companies in 2026
✓ Independently vetted by the WhatiseBrokering team · Last updated July 21, 2026
Every company below passed our vetting checklist — try before you buy or a real money-back guarantee, no fine-print returns, and a human you can reach. TrustScores reflect what we actually verified, not what companies claim.
🏆 Best Choice in 2026
✓ Respondable
✓ VettedAI add-on for Gmail that analyzes your emails in real time to boost clarity, tone, and response rates.
Why we like them
✓Built into Gmail via the Boomerang browser extension/add-on
✓Provides real-time, in-line feedback on tone, politeness, and predicted response rate
✓Part of Boomerang's broader suite (scheduling, follow-ups, send later) with free and paid tiers
What we verified
✓Money-back guarantee verified
—Free trial available
✓Reachable customer service
✓No fine-print return conditions
✓No unrealistic claims detected
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