MailSlurp
On-demand email and SMS testing platform for developers
- Also known as
- mailslurp
What is MailSlurp?
A testing and automation platform providing real email inboxes and phone numbers via APIs and SDKs, enabling developers to verify email flows, OTP delivery, and message behavior in automated tests and CI/CD pipelines.
MailSlurp pricing
We don't have MailSlurp's full plan breakdown yet (its pricing page resisted automated reading). Here's what we could confirm. Always check live pricing for exact numbers.
What MailSlurp does
The capabilities that matter for email testing dev, normalised so it lines up with every alternative. “-” means we haven't confirmed it, not that it's missing.
- API assertions
- ✓
- Rendering preview
- ✓
- Spam score check
- ✓
- Blocklist deliverability check
- ✓
- SMS testing
- ✓
- Production sending addon
- ✓
- Ci cd integration
- ✓
- Multi user inboxes
- ✓
- Open source
- ✗
Platform & deployment
Independently observed- Web
- Cloud / SaaS
Integrations (8)
Independently observed- Zapier
- Gmail
- Outlook
- Dropbox
- Google Drive
- Playwright
- CypressJS
- ACCELQ
MailSlurp alternatives
Other email testing dev we track, ranked by the same independent score.
- Testmail.appProgrammable email testing service for developers and QA automating end-to-end test verificationlow · 42%
- Maildevlow · 24%
- MailosaurPlatform for testing email and SMS communications end-to-end before productionmedium · 55%
- Email on AcidEmail testing and validation platform for pre-send campaign quality assurancemedium · 66%
- GreenMaillow · 31%
- MailHoglow · 19%
Compare MailSlurp
Side by side against other email testing dev, attribute by attribute, with a source on every value.
The Vioscale score: one lens on the evidence
Not user reviews and not a paid placement: a confidence-weighted blend of the independent signals below (adoption, activity, security posture, and more), which you can sort and re-weight yourself. Vendors can correct their listing but can never move their rank, and stars are weighted low as a vanity metric. It is one way to read the evidence for MailSlurp, not the verdict.
| Signal | Score | Weight | Contribution | Evidence |
|---|---|---|---|---|
| Capabilities | 92 | 0.05 | 4.5 | ✓ |
| Price level | 80 | 0.05 | 4.2 | ✓ |
| Security posture | 40 | 0.07 | 2.9 | ✓ |
| Pricing transparency | 25 | 0.08 | 2.1 | ✓ |
| Integrations | 27 | 0.04 | 1.1 | ✓ |
| Reliability | 0 | 0.07 | 0.0 | - |
Computed . Re-weight it by intent, or see the full method.
All data & sourcesshow ↓
Every value we hold, with its source, retrieval date, and confidence. This is the evidence behind the score: don't trust it, verify it.
Features
| Attribute | Value | Evidence |
|---|---|---|
| Capabilities | Sms testing, Api assertions, Spam score check, Ci cd integration, Rendering preview, Multi user inboxes, Production sending addon, Blocklist deliverability check | mediumsource · 2026-08-25 · 60% |
Integrations
| Attribute | Value | Evidence |
|---|---|---|
| Count | 8 | mediumsource · 2026-08-25 · 60% |
Pricing
Security
| Attribute | Value | Evidence |
|---|---|---|
| Soc2 | Yes | lowsource · 2026-08-17 · 48% |