Audience

Advanced Internet users, developers, and professionals seeking an open-source, all-in-one suite for browsing, email, web development, and online communication

About SeaMonkey

SeaMonkey is an all-in-one Internet application suite that combines a web browser, email and newsgroup client, feed reader, IRC chat, and HTML editor into one powerful platform. Developed by the SeaMonkey community, it continues the legacy of the classic Netscape and Mozilla suites with a modern, open-source foundation. Built using the Mozilla Firefox and Thunderbird codebase, SeaMonkey offers a familiar and reliable browsing and communication experience. Users benefit from advanced features like tabbed browsing, smart location bar, adaptive junk filtering, and multi-account support. Its integrated design caters to web developers, advanced users, and corporate professionals who value functionality and control. With ongoing updates and strong community backing, SeaMonkey delivers everything you need for the Internet—right in one place.

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Pricing

Starting Price:
Free
Pricing Details:
Open source
Free Version:
Free Version available.

Integrations

See Integrations

Ratings/Reviews - 2 User Reviews

Overall 5.0 / 5
ease 5.0 / 5
features 5.0 / 5
design 5.0 / 5
support 4.5 / 5
More Reviews Write a Review

Company Information

SeaMonkey
United States
www.seamonkey-project.org

Videos and Screen Captures

SeaMonkey Screenshot 1
SeaMonkey Screenshot 1
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Product Details

Platforms Supported
Windows
Mac
Training
Documentation
Support
Online

SeaMonkey Frequently Asked Questions

Q: What kinds of users and organization types does SeaMonkey work with?
Q: What languages does SeaMonkey support in their product?
Q: What kind of support options does SeaMonkey offer?
Q: What other applications or services does SeaMonkey integrate with?
Q: What type of training does SeaMonkey provide?
Q: How much does SeaMonkey cost?

SeaMonkey Product Features

Code Editors

Keyboard Shortcuts Not Supported
Customizable Themes Not Supported
Multi-Monitor Editing Not Supported
Syntax Highlighting Not Supported
API Not Supported
Code Folding Not Supported
Column Editing Not Supported
Formatting / Table Editing Not Supported
Auto-Complete Not Supported
Debugging Not Supported
WYSIWYG Not Supported

Email Management

Queue Manager Not Supported
Signature Management Not Supported
Response Management Not Supported
Shared Inboxes Not Supported
Whitelisting / Blacklisting Not Supported
Email Archiving Not Supported
Routing Not Supported
Email Monitoring Not Supported
Data Recovery Not Supported
Spam Blocker Not Supported
Email Deletion Not Supported
Email Recall Not Supported
Email Discovery Not Supported

Text Editors

Syntax Highlighting Not Supported
Formatting / Table Editing Not Supported
Code Folding Not Supported
WYSIWYG Not Supported
Column Editing Not Supported
Multi-Monitor Editing Not Supported
Auto-Complete Not Supported
Keyboard Shortcuts Not Supported
Debugging Not Supported
API Not Supported
Customizable Themes Not Supported

SeaMonkey Verified User Reviews

Write a Review
  • David E.
    User
    Used the software for: 2+ Years
    Frequency of Use: Monthly
    User Role: User, Administrator
    Company Size: 1 - 25
    Design
    Ease
    Features
    Pricing
    Support
    Probability You Would Recommend?
    1 2 3 4 5 6 7 8 9 10

    "I use SeaMonkey Composer. Over 20 years."

    Posted 2025-10-04

    Pros: I'm not an HTML / CSS/ ... person, but I have built and maintained my personal sailing / nerd web pages (40 different pages, and counting) for many years, using only SeaMonkey Composer. WYSIWYG make it super easy to use. And free. I don't use the other SeaMonkey tools, just the editor.
    It is the successor from Netscape, so lots of history.

    Cons: I'm sure there are better and more modern tools for making simple web pages, but none as easy and cheap as SeaMonkey. I can't make fancy, active web pages with it. I use external blogs for that, and just include links. Same with Youtube videos.

    Overall: Very good, over 20 years of regular use. Every year or so I look for a modern replacement, and don't find one that comes close.

    Read More...
  • A SeaMonkey Suite User
    Software Developer
    Used the software for: 2+ Years
    Frequency of Use: Daily
    User Role: User
    Company Size: 100 - 499
    Design
    Ease
    Features
    Pricing
    Support
    Probability You Would Recommend?
    1 2 3 4 5 6 7 8 9 10

    "Recommended All-in-One Internet Application Suite"

    Posted 2020-06-26

    Pros: Complete suite of applications for internet usage
    Free to use
    Lightweight feature rich browser based on Firefox
    Email & IRC Chat client
    Composer - powerful HTML editor
    Regular Updates
    Large number of add-ons, themes & extensions
    Great community support

    Cons: It is excellent - simple and powerful - for those who just want pure functionality. It is not widely popular due to its old look and no marketing.

    Overall: SeaMonkey is a free & simple application suite comprising of a browser, email client, IRC chat client, HTML Editor and web development tools. It is quite powerful tool-set and is free to use.

    Read More...
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