vioscale
Comparison

Maildev vs Testmail.app

On the evidence we track, Testmail.app leads this comparison with a composite score of 82/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

Maildev full profile →Testmail.app full profile →
Machine formatsJSONMarkdownGraphQLor send Accept: application/json
Maildev64
★Testmail.app82
Score
Vioscale score
Maildev64 / 100low · 24%updating
Testmail.app82 / 100low · 42%updating
Pricing
Free tier
Maildev✓
Testmail.app✓
Model
Maildevcommercial
Testmail.appfreemium
Price level
Maildevfree
Testmail.applow
Starting price
Maildev–
Testmail.app$12
Transparent
Maildev✓
Testmail.app✓
Integrations
Count
Maildev–
Testmail.app3
Security
Gdpr
Maildev–
Testmail.app✓
Scorecard
Maildev4.6
Testmail.app–
Vulnerabilities
Reliability
Sla pct
Maildev–
Testmail.app99.99
Status page
Maildev–
Testmail.app✓
Adoption
Dependent repos
Maildev313
Testmail.app–
Github stars
Maildev6,032
Testmail.app–
Activity
Commits last 30d
Maildev24
Testmail.app–
Release
Cadence days
Maildev46
Testmail.app–
History
Maildev20 items
Testmail.app–
License
Spdx
MaildevMIT
Testmail.app–
Language
Primary
MaildevTypeScript
Testmail.app–
Market
Availability

Capabilities

Feature-by-feature on the axes that matter for email testing dev. “-” means undocumented, not absent.

Capabilities
API assertions
Maildev-
Testmail.app-
Rendering preview
Maildev-
Testmail.app-
Spam score check
Maildev-
Testmail.app-
Blocklist deliverability check
Maildev-
Testmail.app-
SMS testing
Maildev-
Testmail.app-
Production sending addon
Maildev-
Testmail.app-
Ci cd integration
Maildev-
Testmail.app-
Multi user inboxes
Maildev-
Testmail.app-
Open source
Maildev-
Testmail.app-

What each one is

The product in its own terms, so the numbers below have context.

Maildev

Runs as a local SMTP server with a web inbox interface to capture and review emails generated by your application during development. Supports AI agent integration through the Model Context Protocol for automated email inspection.

Independently observed

Testmail.app

Leader

Provides temporary, addressable mailboxes and APIs enabling developers to capture and verify emails in automated test workflows and CI/CD pipelines without contacting real users.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

Maildev

FreeFree tier

Free & open source (MIT)

as of verify ↗

Testmail.app

Leader
from $12/moSubscriptionFree tier14-day trial

From free to $299/month. Free tier with 100 emails/month. 14-day trial.

  • FreeFree
    • 100 emails/month
    • Unlimited users, email addresses, and mailboxes
  • Essential$12/month or $9/month billed annually
    • 10,000 emails/month
    • Full API access
  • Pro$39/month or $29/month billed annually
    • 50,000 emails/month
    • Unlimited custom namespaces
    • Visual email viewer
    • Priority support
  • Enterprise$129/month or $89/month billed annually
    • 1,000,000 emails/month
    • SSO with SAML 2.0 or OIDC
    • SCIM support
    • Enterprise invoicing
    • 99.99% uptime SLA
  • Unlimited$299/month or $269/month billed annually
    • 10,000,000 emails/month
    • All Enterprise features
    • Unlimited custom domains
    • Custom contracts with enterprise compliance support
as of verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platforms
Web
Maildev✓
Testmail.app✓
CLI
Maildev✓
Testmail.app✗
Deployment
Cloud / SaaS
Maildev✗
Testmail.app✓
Self-hosted
Maildev✓
Testmail.app✗

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

Maildev

Not documented yet.

Testmail.app

Leader
3 total
  • Microsoft Entra ID
  • Okta
  • OneLogin
Independently observed

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.