Email · head-to-head
Kickbox vs mailboxlayer
Kickbox
Kickbox's free, keyless Open API endpoint answers a single question — whether an email domain is disposable — a common building block for lightweight signup-form validation. It's a separate, fully free offering from Kickbox's metered full verification product, which is where catch-all (accept-all) detection lives; a live probe found no catch-all surface on the open endpoint at all.
mailboxlayer
A REST service from APILayer that checks whether an email address is syntactically valid, resolves to real DNS/MX records, and flags free or disposable providers in one call. Free for light personal use, with paid tiers for higher volume.
| Kickbox | mailboxlayer | |
|---|---|---|
| Authentication | None | API Key |
| Pricing | free | freemium |
| Formats | JSON | JSON |
| CORS | yes | yes |
| HTTPS | Yes | Yes |
Kickbox needs no API key, while mailboxlayer requires API Key — pick Kickbox to start without signup.