awesome-oss-alternatives: Find Open-Source SaaS Alternatives

Overview

RunaCapital's awesome-oss-alternatives is a categorized directory for finding open-source products that address problems also served by established SaaS offerings. Instead of implementing software itself, the repository helps readers discover projects and the startups built around them.

It is useful when evaluating options across areas such as authentication, analytics, data tools, collaboration, and infrastructure. Entries link to project repositories and identify the commercial products they are presented as alternatives to. The list uses stated inclusion criteria, but its maintainers note that startup information changes quickly and the directory may not be complete or fully current.

Key Features

• Organizes entries by product category, with companies listed alphabetically within categories.
• Connects each listed company to a product or project repository.
• Describes what each product does and names the SaaS products it is positioned against.
• Covers a broad range of software areas, from API platforms and CMS tools to security and observability.
• Sets inclusion criteria around an open-source foundation, a comparable closed-source competitor, a private for-profit company founded within the last 10 years, and a repository with at least 100 stars.
• Invites community contributions to add startups and improve coverage.
• Links to Runa Capital's separate ROSS index for quarterly information about fast-growing open-source startups.

Use Cases

• A developer comparing self-hostable or open-source options before adopting a SaaS tool can browse the relevant category and inspect linked repositories.
• A startup team evaluating infrastructure or business software can use the directory to create an initial shortlist of alternatives.
• A founder or investor researching open-source startups can scan products by market category and follow the linked company and repository pages.
• A contributor who knows a qualifying open-source startup can use the project contribution guide to propose an addition.

Getting Started

Browse the repository README and use its Startup List to find a category, then follow an entry's repository link. There is no software installation step described for using the directory.

Alternatives

• definitive-opensource: Catalogs consumer-facing open-source apps across platforms, rather than startup products positioned as alternatives to commercial SaaS.

Considerations

• This is a discovery list, not a software product or a guarantee that listed projects meet a particular team's technical or operational needs.
• The maintainers explicitly warn that the list may be incomplete or out of date because the startup landscape changes quickly. Verify each project's current status, license, and capabilities at its linked repository.
• The inclusion criteria favor qualifying private, for-profit startups and require a repository with 100+ stars, so the directory is not a comprehensive catalog of all open-source alternatives.
• The repository has 148 open issues, so readers should check the current README and project activity when assessing individual entries.