runacapital/awesome-oss-alternatives

This repository is a curated list of open-source companies and projects that serve as alternatives to well-known paid software-as-a-service (SaaS) products. SaaS products are cloud tools you typically pay a monthly subscription for, things like user authentication services, analytics platforms, customer support tools, or data pipelines. Open-source alternatives give you software you can host yourself or use for free, often with the full source code available. The list is organized by category, authentication, API gateways, analytics, databases, error tracking, and many more. Each entry shows the open-source project, a brief description, its GitHub star count, and which paid product it competes with. To qualify for the list, a project must be backed by a private startup company, have a well-known commercial rival, and have at least 100 GitHub stars. You would use this list when evaluating tools to build a product, trying to cut SaaS costs by self-hosting, or researching the open-source startup landscape. It is maintained by Runa Capital, a venture capital firm, and covers hundreds of projects across dozens of categories. There is no code to run, it is a reference document.