plop.email vs Testmail.app

Both tools are built for automated email testing. Here's how they compare.

Visit Testmail.app

plop.email

14-day free trial

From $5/mo

Testmail.app

Free forever plan

From $9/mo

Feature Comparison

Core Features

Featureplop.emailTestmail.app
Programmable inboxes
REST API
Plus-addressing
Namespace organization
Tags
Namespaces
Email history
7 days
30 days

Developer Experience

Featureplop.emailTestmail.app
Open source
Winner
Self-hosting
Winner
API documentation
OpenAPI
REST docs
CI/CD examples

Pricing

Featureplop.emailTestmail.app
Free tier
14-day trial
Free tier
Starting price
$5/moWinner
$9/mo
Pricing transparency
Fully public
Public

The Verdict

Testmail.app is a solid email testing service with good automation features. plop.email offers open-source transparency, simpler pricing, and self-hosting capability.

Choose plop.email if:

  • You want open-source with self-hosting
  • You need simpler, lower-cost pricing
  • You prefer minimal API surface
  • You want to audit the code yourself

Choose Testmail.app if:

  • You want a mature, established service
  • You need advanced filtering options
  • You prefer namespace-based organization
  • You want more email history retention

plop.email Advantages

Open Source

AGPL-3.0 licensed. Self-host or contribute to the codebase.

Lower Cost

Plans start at $5/mo vs $9/mo for similar features.

Simpler API

Minimal endpoints to learn, works with any HTTP client.

Testmail.app Advantages

Email Retention

30-day email history vs 7 days on plop.

Namespace System

Organize tests by project with namespace isolation.

Established Service

Longer track record in the email testing space.

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