tool · pricing · live estimate
Updated May 12, 2026
Estimate monthly cost before you wire a spam filter into comments, contact forms, signups, or support intake.
10K free, Pro starts at $9/mo; overage after 1M included requests.
Approximation; CleanTalk packaging is site/product oriented, not purely request based.
Approximation from public tiers; high volume uses Scale-style blocks.
Commercial API pricing varies by plan/site; estimate based on public call caps.
Cost matters, but so do response shape, false positives, privacy, latency, integrations, and whether your team wants a plugin or a raw API. Use this calculator to shortlist, then read the API comparison guide.
At 100,000 requests per month, Siftfy is $9, CleanTalk is around $12, OOPSpam is around $49, and Akismet commercial plans land in the $50–500 range depending on tier. Costs scale very differently above 300k/month — use the calculator to size your own volume.
Yes. Siftfy includes 10,000 requests per month on the free tier, with no credit card required. OOPSpam offers a small free trial (40 requests). Akismet is free for non-commercial personal sites only.
Sum your monthly contact-form submissions, comments, signups, and any other text-classified events. Add 30% headroom for spikes. Most small SaaS sites land between 5k and 50k/month; high-traffic blogs and marketplaces typically run 100k–1M/month.
They're estimates derived from publicly advertised pricing pages as of the most recent update. Each provider may change tiers or offer custom enterprise pricing. Treat the calculator as a shortlist tool, not a quote.