Vetted & Ranked
Best Vetted Antispam / Contact Form Protection API Companies in 2026
✓ Independently vetted by the WhatiseBrokering team · Last updated July 14, 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
✓ Bot Butcher
✓ VettedAn API that uses a fine-tuned LLM to classify contact form submissions as spam or not spam.
Why we like them
✓Usage-based pricing with a free tier for up to 10 requests/month; paid tiers add a $1.99 monthly flat fee plus $0.01–$0.02 per request
✓Claims 99% accuracy on a human-graded benchmark test, versus 55% and 51% for named competitors
✓Offers optional 'do not train' and 'do not save' settings for privacy-conscious data handling
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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