Real inbox and phone provisioning
Generate isolated email addresses and SMS numbers on demand for auth, notification, and campaign QA workflows.
Test the workflows that break releases first
Use real inboxes, phone numbers, wait APIs, and message assertions to validate signup, reset, OTP, notifications, rendering, and pre-send quality before anything customer-facing ships.
Trusted by top companies worldwide
Core testing capabilities
Give release teams real proof that message workflows work
MailSlurp turns inboxes, phone numbers, and message assertions into a repeatable testing surface for engineering, QA, and lifecycle teams.
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Wait and assertion APIs for real messages
Capture matching emails and SMS, then assert subjects, senders, links, codes, headers, and attachments without brittle sleeps.
Rendering, audit, and content-quality checks
Pair inbox assertions with template QA so broken links, missing assets, and markup defects are caught before launch.
Stored bodies, headers, links, codes, and attachments
Keep the exact message artifacts from each run so launches rely on real email and SMS evidence instead of mocked provider responses.
Create fresh inboxes for every run
Provision inboxes per suite, worker, or scenario so failures stay tied to one execution path.
Validate signup, reset, and OTP in one workflow
Use the same evidence model for email and SMS when account journeys span both channels.
Review rendering, links, and missing assets before send
Move campaign and notification review out of rushed mailbox spot checks and into repeatable pre-send QA.
Developer integration
Drop message assertions into Playwright, Cypress, Selenium, or CI
Use SDK helpers inside your existing test runners instead of building mailbox polling and parsing from scratch.
- Wait for matching email or SMS in test code
- Extract links, codes, and headers for assertions
- Run the same patterns locally and in CI
Ready to turn message testing into a release control?
Ready to turn message testing into a release control?
Start with one critical workflow, then expand the same inbox and SMS model across the rest of your release process.