Thunderbird AlternativesOnly apps categorised as Web Browsers

The best Web Browser alternative to Thunderbird is SeaMonkey, which is both free and Open Source. If that doesn't work for you, our users have ranked more than 50 alternatives to Thunderbird, but unfortunately only two of them are Web Browsers.

filter to find the best alternatives

Thunderbird alternatives are mainly Email Clients, but if you're looking for Web Browsers or IRC Clients you can filter on that. Other popular filters include Linux, Open Source, iPhone, Windows + Open Source, Windows, Free and iPad. You can also filter by region, for example EU-based alternatives if you prefer software developed in the European Union. These are just examples - use the filter bar below to find more specific alternatives to Thunderbird.
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Alternatives list

  1. SeaMonkey icon

    SeaMonkey

     241 likes
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    Web-browser, advanced e-mail, newsgroup and feed client, IRC chat, and HTML editing in one application. Itis built on the open source Mozilla Gecko engine, the same code which underlies Thunderbird and is the base for the Firefox browser.

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • BSD
    • PortableApps.com
    SeaMonkey screenshot 1
     
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    4
    43
    Comments about SeaMonkey as an Alternative to Thunderbird
    Guest
    Positive
    21

    SeaMonkey is both a WEB BROWSER and EMAIL CLIENT. It's the successor of Mozilla Application Suite or Netscape Communicator, resp. Further it includes also a news client program, an HTML editor (SeaMonkey Composer) and an IRC client (ChatZilla).

    Review by a new / low-activity user.
    apostolfaliagas
    Positive
    15

    It has all of Thunderbird's features and many more.

    Guest
    Negative
    0

    Unfortunately doesn't support synchronization with CardDAV address books.

    Review by a new / low-activity user.
    Show more comments
    3 of 4 comments
    Thunderbird Icon
    SeaMonkey icon

    • Some users think SeaMonkey is a great Thunderbird alternative, some don't.

    • SeaMonkey is Free and Open SourceThunderbird is also Free and Open Source
    • SeaMonkey is LightweightThunderbird is not according to our users
  2. Iceape-UXP icon

    Iceape-UXP

     Like
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    Historically, Iceape was a re-branding of SeaMonkey by the Debian project. However, Debian discontinued Iceape in December 2013 citing security concerns and lack of a maintainer.

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Linux
     
2 of 2 Thunderbird alternatives