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FakeSMTP vs Rainloop

Professional comparison and analysis to help you choose the right software solution for your needs.

FakeSMTP icon
FakeSMTP
Rainloop icon
Rainloop

FakeSMTP vs Rainloop: The Verdict

⚡ Summary:

FakeSMTP: FakeSMTP is an open source SMTP test server that allows developers to test email sending from their applications without actually sending emails through an SMTP server. It is lightweight, easy to install, and useful for testing email functionality during development.

Rainloop: Rainloop is an open-source webmail client that can be self-hosted. It has modern features like conversation threading, contact management, calendar, and more. It's lightweight, customizable, and works great for personal or business email.

Both tools serve their respective audiences. Compare the features, pricing, and user ratings above to determine which best fits your needs.

Last updated: May 2026 · Comparison by Sugggest Editorial Team

Feature FakeSMTP Rainloop
Sugggest Score — —
Category Development Social & Communications
Pricing Open Source Open Source

Product Overview

FakeSMTP
FakeSMTP

Description: FakeSMTP is an open source SMTP test server that allows developers to test email sending from their applications without actually sending emails through an SMTP server. It is lightweight, easy to install, and useful for testing email functionality during development.

Type: software

Pricing: Open Source

Rainloop
Rainloop

Description: Rainloop is an open-source webmail client that can be self-hosted. It has modern features like conversation threading, contact management, calendar, and more. It's lightweight, customizable, and works great for personal or business email.

Type: software

Pricing: Open Source

Key Features Comparison

FakeSMTP
FakeSMTP Features
  • Runs as a local SMTP server that receives email messages
  • Allows sending email messages to it during development for testing
  • Does not actually send the emails out, just captures them locally
  • Lightweight and easy to install
  • Works cross-platform on Windows, Linux and Mac
  • Open source and free
Rainloop
Rainloop Features
  • Web-based email client
  • Compatible with IMAP/SMTP
  • Conversation threading
  • Contact management
  • Calendar
  • Keyboard shortcuts
  • Themes & plugins
  • Mobile app available

Pros & Cons Analysis

FakeSMTP
FakeSMTP
Pros
  • No need to connect to a real SMTP server during development
  • Avoids sending test emails accidentally to real users
  • Saves time by speeding up email testing
  • Simple to set up and use
  • Being open source allows customization if needed
Cons
  • Limited to testing email sending, not receiving
  • Not a full email test platform with reporting
  • Requires rerouting application to use it instead of normal SMTP
  • Does not test actual email deliverability
Rainloop
Rainloop
Pros
  • Open source and self-hosted
  • Lightweight and fast
  • Modern interface
  • Highly customizable
  • Supports multiple languages
Cons
  • Limited native mobile apps
  • Lacks some advanced features like email parsing
  • Can be complex to set up initially

Pricing Comparison

FakeSMTP
FakeSMTP
  • Open Source
Rainloop
Rainloop
  • Open Source

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Learn More About Each Product

FakeSMTP
FakeSMTP
Reviews, pricing & alternatives →
Rainloop
Rainloop
Reviews, pricing & alternatives →

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