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.
When to choose InboxRhino
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.
When to choose testmail.app
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.
Features and pricing: InboxRhino vs testmail.app
| 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.
Frequently asked questions
- How do the InboxRhino and testmail.app free plans compare?
- InboxRhino's free tier is 11 active inboxes and 33 inbound emails per month, with 30-day message retention. testmail.app's free plan is 100 emails per month with one-day retention.
- Does InboxRhino support GraphQL?
- No. InboxRhino is a REST API with an OpenAPI specification and a Postman collection. testmail.app offers JSON REST and GraphQL with live queries.
- Does InboxRhino give spam scores?
- Not in v1. testmail.app includes SpamAssassin reports.
See Mailosaur alternative, InboxRhino vs MailSlurp, Playwright email testing, and InboxRhino pricing.