3 Top Open Source Email Clients for Windows in 2024
Reviews, comparison, screenshots and more for the 3 top open-source email clients for Windows.
Email Client Screenshots
Mozilla Thunderbird
Mozilla Thunderbird is an open-source email client for Windows and is written in the JavaScript & C++ programming language. The official description from its website says, "Access all your messages, calendars, and contacts in one fast app."
Claws Mail
Claws Mail is an open-source email client for Windows and is written in the C (GTK) programming language. The official description from its website says, "Claws Mail is an email client (and news reader), based on GTK+..."
Sylpheed
Sylpheed is an open-source email client for Windows and is written in the C & GTK+ programming language. The official description from its website says, "Sylpheed is a simple, lightweight but featureful, and easy-to-use e-mail client."
Email Client Comparison
Name | Description | Screenshot | Platforms | Language | Website | Wikipedia |
---|---|---|---|---|---|---|
Mozilla Thunderbird ⭐ Recommended | Access all your messages, calendars, and contacts in one fast app. | Screenshot |
| JavaScript & C++ | Website | Wikipedia |
Claws Mail | Claws Mail is an email client (and news reader), based on GTK+... | Screenshot |
| C (GTK) | Website | Wikipedia |
Sylpheed | Sylpheed is a simple, lightweight but featureful, and easy-to-use e-mail client. | Screenshot |
| C & GTK+ | Website | Wikipedia |
Why use us as your email provider?
What makes us different than others?
- We're the only 100% open-source provider
- We don't rely on any third parties (we don't use Amazon SES or an alternative like others)
- Our pricing allows you to scale cost effectively (we don't charge per user and you can pay as you go for storage)
- Unlike others, your email with us is not stored in a shared relational database alongside everyone else
- We're the world's first and only email service to use quantum-safe and individually encrypted SQLite mailboxes
Did you know?
Other email services advertise as open-source, but they do not release the source code to their back-end. The back-end is the most sensitive part of an email provider. It is also important to use 100% open-source because it builds trust and allows anyone to contribute and independently audit.