MailSlurp
Email and SMS testing and automation platform with API and dashboard access
- Also known as
- mailslurp
What is MailSlurp?
MailSlurp is a cloud-based service that allows developers to create test email addresses and phone numbers, preview emails on real devices, validate message delivery, extract data from messages, and build automated messaging workflows through REST APIs and SDKs.
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 (14)
Independently observed- Mailchimp←•
- Klaviyo←•
- HubSpot←•
- Salesforce←•
- Zapier
- Gmail
- Outlook
- Dropbox
- Google Drive
- Playwright
- CypressJS
- ACCELQ
- Cypress•
- Selenium•
MailSlurp FAQ
Common questions about MailSlurp, answered from independent, dated evidence.
What is MailSlurp?
MailSlurp is an email and SMS testing platform providing ephemeral or permanent inboxes and phone numbers for developers to verify sign-ups, OTPs, and notification delivery. It includes email preview across multiple clients, deliverability tracking, and REST APIs for integration into automated test workflows. It is indexed under Email Testing Dev.
Source: https://www.mailslurp.com
Is MailSlurp free?
MailSlurp offers a free tier, so you can start without paying. Pricing changes often, so verify at source before relying on it.
What platforms does MailSlurp support?
We have confirmed browser-based access to MailSlurp. That is the extent of what we could verify from public sources, so it may well offer desktop or mobile clients we have not indexed.
Source: https://www.mailslurp.com
Can MailSlurp be self-hosted?
We have only confirmed a cloud / SaaS deployment for MailSlurp, so it appears to be vendor-hosted. If a self-hosted option exists we have not found it documented publicly.
Source: https://www.mailslurp.com
What does MailSlurp integrate with?
We have confirmed 12 integrations for MailSlurp, including Zapier, Gmail, Outlook, Dropbox, Google Drive, Playwright, CypressJS and ACCELQ, plus 4 more. This is what we could verify from public sources, so the vendor may support others we have not indexed.
Source: https://www.mailslurp.com
What security certifications does MailSlurp have?
We have independently confirmed SOC 2 for MailSlurp. Certifications we do not list are ones we have not been able to verify from public sources, which is not the same as MailSlurp not holding them. Always confirm compliance directly before you rely on it.
Source: https://www.mailslurp.com
MailSlurp alternatives
Other email testing dev we track, ranked by the same independent score.
- Testmail.appAPI-based email testing platform for automated QA and CI/CD workflowslow · 45%
- MailosaurPlatform for automated email and SMS testing with integrated message previews and test automation supportmedium · 56%
- Email on AcidEmail testing and validation platform for pre-send campaign quality assurancemedium · 64%
- GreenMailAn open source sandbox for testing email server protocols without sending actual emailslow · 31%
- MaildevDevelopment email testing utility with SMTP server and web dashboardlow · 35%
- Mailpitlow · 29%
Compare MailSlurp
Side by side against other email testing dev, attribute by attribute, with a source on every value.
The vioscaleAI 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 |
|---|---|---|---|---|
| Price level | 100 | 0.04 | 4.0 | ✓ |
| Security posture | 45 | 0.09 | 3.9 | ✓ |
| Capabilities | 92 | 0.03 | 2.9 | ✓ |
| Pricing transparency | 25 | 0.05 | 1.3 | ✓ |
| Integrations | 27 | 0.04 | 1.0 | ✓ |
| Reliability | 0 | 0.05 | 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.
Content
| Attribute | Value | Evidence |
|---|---|---|
| Faq | 6 items | mediumsource · 2026-09-10 · 58% |
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 · 2026-10-12 · 60% |
Integrations
| Attribute | Value | Evidence |
|---|---|---|
| Count | 8 | mediumsource · 2026-10-12 · 60% |
Pricing
Security
Is MailSlurp the right choice for you?
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