Automate email tests | loved by developers & QA teams
Test new user signups, transactional emails, spam scores, and more. Get started on our free forever plan with unlimited email addresses and mailboxes.
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TestMail.app provides unlimited disposable email addresses and mailboxes via APIs for developers and QA teams to safely automate end-to-end email testing.
🚀 Overview
TestMail.app solves the critical problem of developers and QA teams accidentally sending test or broken emails to real customers during development, integration, or CI/CD testing. By providing on-demand, unlimited real email addresses (e.g., {namespace}.{tag}@inbox.testmail.app) that receive, parse, index, and make emails queryable via APIs, it ensures safe, reliable email testing.
It's built for developers, QA engineers, and teams using tools like Cypress, Playwright, or any test framework needing to verify signups, transactional emails, OTPs, magic links, drip campaigns, and spam scores.
The service was created to eliminate email testing pains with a simple, powerful API, high uptime, team features, and real engineer support, preventing production mishaps and speeding up development cycles.
✨ Key Features
- Unlimited email addresses and mailboxes created on-the-fly with tags and namespaces for isolation and access control (what it does: enables dynamic testing; why: scales to any test volume without setup)
- Powerful GraphQL and JSON APIs for advanced querying, live searches, sorting, pagination, attachments, and SpamAssassin reports (matters for: precise automation in any language/CI/CD)
- Team collaboration tools: invite members, multiple namespaces/API keys, usage monitoring, shared viewers (enables: secure team testing without extra cost)
- Visual email viewer, comprehensive docs with playground, priority support; upcoming: more integrations hinted in blog
🛠 Tech Stack
- Frontend: Modern JavaScript framework (inferred from interactive UI and docs playground)
- Backend: GraphQL API, JSON/REST endpoints, SpamAssassin integration
- Clients: TypeScript (open-source graphql-request fork)
- Hosting: Distributed across multiple data centers (Toronto, Canada-based), 99.99% uptime SLA
- Auth: Passwordless, API keys; Enterprise: SSO (SAML/OIDC), SCIM
👥 Who Is This For?
This project is useful for:
- Developers who want to automate email assertions in E2E tests without real inboxes
- Teams looking for reliable CI/CD email mocking with spam testing and attachments
- Indie makers building apps with user flows involving emails (signups, resets)
📸 Screenshots / Demo
- Live demo: https://testmail.app
- GitHub: https://github.com/testmail-app
🔥 Project Status
- 🟢 Actively building
Last updated: 2026-03-24
❓ FAQ
Is this project free?
Freemium — Forever free plan (100 emails/month, unlimited addresses/mailboxes), paid from $9/mo for higher limits, custom retention, priority features. (Explain briefly.)
Is the source code available?
No — core service is proprietary SaaS; open-source TypeScript GraphQL client at https://github.com/testmail-app/graphql-request
Can I contribute?
Provide feedback, feature requests, or bug reports via support@testmail.app or docs contact form. PRs/issues welcome on GitHub repos.
📬 Contact & Links
- Website: https://testmail.app
- GitHub: https://github.com/testmail-app
- Twitter/X: https://x.com/testmailapp
- Email: support@testmail.app
Built with ❤️ and kept warm on WarmIndex.
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