Best Open Source Security Software 2025

Security Software

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Browse free open source Security software and projects for Windows and Mac below. Use the toggles on the left to filter open source Security software by OS, license, language, programming language, and project status.

MongoDB Atlas runs apps anywhere
Deploy in 115+ regions with the modern database for every enterprise.

MongoDB Atlas gives you the freedom to build and run modern applications anywhere—across AWS, Azure, and Google Cloud. With global availability in over 115 regions, Atlas lets you deploy close to your users, meet compliance needs, and scale with confidence across any geography.

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The All-in-One Commerce Platform for Businesses - Shopify
Shopify offers plans for anyone that wants to sell products online and build an ecommerce store, small to mid-sized businesses as well as enterprise

Shopify is a leading all-in-one commerce platform that enables businesses to start, build, and grow their online and physical stores. It offers tools to create customized websites, manage inventory, process payments, and sell across multiple channels including online, in-person, wholesale, and global markets. The platform includes integrated marketing tools, analytics, and customer engagement features to help merchants reach and retain customers. Shopify supports thousands of third-party apps and offers developer-friendly APIs for custom solutions. With world-class checkout technology, Shopify powers over 150 million high-intent shoppers worldwide. Its reliable, scalable infrastructure ensures fast performance and seamless operations at any business size.

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1

KeePass

A lightweight and easy-to-use password manager

KeePass Password Safe is a free, open source, lightweight, and easy-to-use password manager for Windows, Linux and Mac OS X, with ports for Android, iPhone/iPad and other mobile devices. With so many passwords to remember and the need to vary passwords to protect your valuable data, it’s nice to have KeePass to manage your passwords in a secure way. KeePass puts all your passwords in a highly encrypted database and locks them with one master key or a key file. As a result, you only have to remember one single master password or select the key file to unlock the whole database. And the databases are encrypted using the best and most secure encryption algorithms currently known, AES and Twofish. See our features page for details.

609 Reviews

Downloads: 1,465,786 This Week

Last Update: 4 days ago
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2

EnigWeb

Enigweb is a firefox extension similar to the Thunderbird Enigmail extension. It will encrypt or sign textareas, and decrypt/verify OpenPGP data. Additionally extensions will be provided for major webmail providers.

Downloads: 0 This Week

Last Update: 2023-06-13
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3

FOX for Tn

A modern secure, robust, multithreaded, exception aware, internationalisable, portable GUI toolkit library designed for mission-critical work in C++ and Python forked from the FOX library. Replicates the Qt API in many places.

Downloads: 0 This Week

Last Update: 2013-05-21
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4

antivisor

Visual interface to graphically manage antiviruses. Multilingual!. Needs Python with Gtk libraries and, of course, the (free or non-free) antivirus-es to be managed.

Downloads: 0 This Week

Last Update: 2014-05-05
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Simple, Secure Domain Registration
Get your domain at wholesale price. Cloudflare offers simple, secure registration with no markups, plus free DNS, CDN, and SSL integration.

Register or renew your domain and pay only what we pay. No markups, hidden fees, or surprise add-ons. Choose from over 400 TLDs (.com, .ai, .dev). Every domain is integrated with Cloudflare's industry-leading DNS, CDN, and free SSL to make your site faster and more secure. Simple, secure, at-cost domain registration.

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