Testmail.app
API-based email testing platform for automated QA and CI/CD workflows
- Also known as
- testmail-app
Available worldwide
What is Testmail.app?
A programmable email testing service that provides temporary email addresses and mailboxes for automated testing, allowing developers to validate email delivery and functionality without affecting real customers.
Testmail.app pricing
Plans, per-tier features and add-ons, dated and linked to live pricing. Pricing changes often; always verify at source before you rely on it.
Free forever (100 emails/month) plus 14-day free trial. Paid plans from $9–$269/month.
Free
FreeForever free plan
- emails
- 100/month
- 100 emails/month
- Unlimited users, email addresses, and mailboxes
- 1 day retention
Essential
For small projects
- emails
- 10,000/month
- retention
- 1-3 days
- 10,000 emails/month
- 1-3 days retention
- One random namespace
- Full API access
Pro
Most popular plan
- emails
- 50,000/month
- retention
- 1-30 days
- 50,000 emails/month
- Unlimited custom namespaces
- Visual viewer
- Priority support
Enterprise
For power users
- emails
- 1,000,000/month
- 1,000,000 emails/month
- Custom retention
- SSO with SAML 2.0 or OIDC
- Enterprise invoicing
- 99.99% uptime SLA
Plus
Unlimited - best of everything
- emails
- 10,000,000/month
- 10,000,000 emails/month
- All Enterprise features
- Unlimited custom domains
- Custom contracts with enterprise compliance support
- SCIM support
What Testmail.app 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 (3)
Independently observed- Microsoft Entra ID
- Okta
- OneLogin
Testmail.app FAQ
Common questions about Testmail.app, answered from independent, dated evidence.
What is Testmail.app?
A cloud-based email testing service that provides isolated mailboxes accessible via API for automated testing of email deliverability, OTP flows, and end-to-end email validations in CI/CD pipelines. It is indexed under Email Testing Dev.
Source: https://testmail.app/pricing/
Is Testmail.app free?
Testmail.app offers a free tier, so you can start without paying. Paid plans start at $9 per year. Prices are published openly on the vendor's own pricing page. Pricing changes often, so verify at source before relying on it.
Source: https://testmail.app/pricing/
What platforms does Testmail.app support?
We have confirmed browser-based access to Testmail.app. 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://testmail.app/pricing/
Can Testmail.app be self-hosted?
We have only confirmed a cloud / SaaS deployment for Testmail.app, so it appears to be vendor-hosted. If a self-hosted option exists we have not found it documented publicly.
Source: https://testmail.app/pricing/
What does Testmail.app integrate with?
We have confirmed 3 integrations for Testmail.app, including Microsoft Entra ID, Okta and OneLogin. This is what we could verify from public sources, so the vendor may support others we have not indexed.
Source: https://testmail.app/pricing/
What security certifications does Testmail.app have?
We have independently confirmed GDPR for Testmail.app. Certifications we do not list are ones we have not been able to verify from public sources, which is not the same as Testmail.app not holding them. Always confirm compliance directly before you rely on it.
Source: https://testmail.app/blog/email-regulatory-compliance-simplified/
Where is Testmail.app available?
Testmail.app is available worldwide. Its primary market is the United States.
Source: https://testmail.app/pricing/
Testmail.app alternatives
Other email testing dev we track, ranked by the same independent score.
- 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%
- MailSlurpEmail and SMS testing and automation platform with API and dashboard accessmedium · 54%
- MaildevDevelopment email testing utility with SMTP server and web dashboardlow · 35%
- Mailpitlow · 29%
Compare Testmail.app
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 Testmail.app, not the verdict.
| Signal | Score | Weight | Contribution | Evidence |
|---|---|---|---|---|
| Reliability | 100 | 0.05 | 5.3 | ✓ |
| Pricing transparency | 100 | 0.05 | 5.3 | ✓ |
| Price level | 80 | 0.04 | 3.2 | ✓ |
| Capabilities | 75 | 0.03 | 2.4 | ✓ |
| Integrations | 17 | 0.04 | 0.7 | ✓ |
| Security posture | 5 | 0.09 | 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 | 7 items | mediumsource · 2026-09-10 · 60% |
Features
| Attribute | Value | Evidence |
|---|---|---|
| Capabilities | Api assertions, Spam score check, Ci cd integration, Rendering preview, Multi user inboxes | mediumsource · 2026-10-12 · 60% |
Integrations
| Attribute | Value | Evidence |
|---|---|---|
| Count | 3 | mediumsource · 2026-10-12 · 60% |
Market
| Attribute | Value | Evidence |
|---|---|---|
| Availability | HqCountry: CA · PrimaryMarkets: … · AvailabilityScope: global · AvailableCountries: … · NotAvailableCountries: … | highsource · 2026-10-12 · 75% |
Pricing
Reliability
Security
Is Testmail.app the right choice for you?
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