InboxRhino vs testmail.app
Both are receive-only email testing APIs for developers and QA. testmail.app sells unlimited tag-based addresses, GraphQL, live queries, and SpamAssassin scores. InboxRhino sells a sandboxed HTML console, named API keys, OpenAPI/Postman, and INR billing designed for Indian teams. Choose InboxRhino when you want visual debugging and GST-ready pricing. Choose testmail.app when GraphQL filters, spam scores, or tag namespaces matter more. Confirm current testmail behaviour on testmail.app.
Who each product fits
InboxRhino fits Playwright and Cypress suites that need a real MX inbox, a browser viewer for QA, and a free tier large enough to wire one flow. Paid Starter/Growth/Scale prices are listed in INR; checkout is not open yet.
testmail.app fits teams that want a namespace.tag address scheme, GraphQL search, and live queries. The free plan is 100 emails per month with one-day retention after a trial. Higher plans unlock longer retention and custom namespaces.
| Capability | InboxRhino | testmail.app |
|---|---|---|
| Receive-only email for tests | Yes, real MX on test.inboxrhino.in | Yes, namespace.tag@inbox.testmail.app |
| Wait-for-message / live query | REST wait up to 180s | JSON livequery and GraphQL live queries |
| Visual HTML inbox | Yes, sandboxed in the console | Visual viewer on paid plans |
| API style | REST + OpenAPI + Postman | JSON REST and GraphQL |
| Unlimited addresses | Per-inbox create/delete under quota | Unlimited tags inside a namespace |
| SpamAssassin reports | Not in v1 | Yes |
| Free access | 11 inboxes / 33 emails, 30-day retention | 100 emails / month, 1-day retention |
| Paid starting price | INR plans listed; checkout not open | Essential / Pro USD plans |
| INR / GST invoices | Designed, checkout coming | USD billing |
| Message delete for quota | Delete inbox to free active slots | Retention cron; no delete-in-API for quota |
Compared on 11 September 2026 from InboxRhino's live product and testmail.app's public site and pricing page. Competitor cells can change; re-check before you buy. InboxRhino paid checkout is not live.
See Mailosaur alternative, InboxRhino vs MailSlurp, Playwright email testing, and InboxRhino pricing.