btw-so/open-source-alternatives

This repository is a curated list of open-source alternatives to popular paid SaaS products. The idea is simple: for many common software services that people pay for on a subscription basis, there are free and open-source options that cover much of the same ground. This list collects them in one place, organized by product category, so someone can find candidates without hunting across dozens of separate websites. The categories span a wide range of business and personal software. There are sections for AI chatbots as alternatives to ChatGPT, AI code completion as alternatives to GitHub Copilot, team knowledge bases as alternatives to Notion, internal tool builders as alternatives to Retool, web analytics as alternatives to Google Analytics, note-taking and knowledge management as alternatives to Evernote, company blogs and newsletters, blogging platforms, static website generators, e-commerce solutions, database management interfaces, customer support software, video conferencing tools, password managers, and cloud file storage, among others. Each entry shows the project name, a link to its website, and its current GitHub star count. The list does not include written descriptions or feature comparisons. This makes it a quick reference guide: you find candidates in a category, then visit the linked GitHub repositories to evaluate each one in more detail. The list is structured as tables grouped by the type of paid service being replaced. The format is consistent across sections, so scanning from category to category is straightforward. The repository is maintained as a community resource and covers dozens of categories. The README is longer than what was shown.