Rainloop vs Viber

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

Rainloop

Viber

Rainloop vs Viber: The Verdict

⚡ Summary:

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.

Viber: Viber is a free messaging and calling app for smartphones. It uses your phone number to connect you with people in your contacts and allows free calls, texts, photos and video messages over WiFi.

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	Rainloop	Viber
Sugggest Score	—	—
Category	Social & Communications	Social & Communications
Pricing	Open Source	—

Product Overview

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

Viber

Description: Viber is a free messaging and calling app for smartphones. It uses your phone number to connect you with people in your contacts and allows free calls, texts, photos and video messages over WiFi.

Type: software

Key Features Comparison

Rainloop Features

Web-based email client
Compatible with IMAP/SMTP
Conversation threading
Contact management
Calendar
Keyboard shortcuts
Themes & plugins
Mobile app available

Viber Features

Free calls
Free messages
Group chats
Stickers
Photo and video sharing
Voice messages
Location sharing

Pros & Cons Analysis

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

Viber

Pros

Free calls and messages
Works across platforms
Good call quality
Fun stickers and emojis
Group chats

Cons

Contacts need to be using Viber too
Some features are paid only
No cloud sync between devices
Limited customization options

Pricing Comparison

Rainloop

Open Source

Viber

Not listed

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