Findymail verifies via SMTP with solid accuracy. Coalstoke adds per-domain pattern learning on top of SMTP verification and documents every result with a status code rather than a binary valid/invalid flag.
| Feature | Coalstoke | Findymail |
|---|---|---|
| Free tier | 50 credits, no card | Findymail — limited trial or none |
| Per-credit price (equiv plan) | $0.0019 (Growth) | see table below |
| Pricing model | per workspace | Findymail — often per seat |
| Status codes | deliverable · catch_all · protected · undeliverable | usually pass/fail only |
| Catch-all handling | confidence-scored guess (opt-in) | often silently marks as "found" |
| Proofpoint/O365 | returns protected + guess | usually returns "not found" |
| BYOK fallback | yes — plug in any provider key as backup | no |
| Per-domain pattern learning | yes — improves with every lookup | partial |
| Bulk API | 10,000 items/job + webhook | varies |
| Live stats dashboard | public /stats page — every verdict | no |
Live-fetched from our competitor database. Coalstoke rows are highlighted.
| Provider | Tier | Monthly | Credits | Per credit | vs. our Growth |
|---|---|---|---|---|---|
| Findymail Grow | flat | $99 | 2,500 | $0.040 | 21.1× more |
Our SMTP layer runs first on every lookup. Domains it can't verify directly get routed to your Findymail key. You pay Findymail only for the fallback fires. Numbers below are what you actually keep.
Zero risk. Keep your Findymail subscription; plug the key into our BYOK fallback and let us handle the domains our SMTP fleet cracks directly for free.
Start free — 50 credits