?What are the best GitHub repos for startups?▾
If you only pick five, pick Next.js to build the app, Supabase for the backend, PostHog for product analytics, Sentry for errors and Coolify to host it yourself. The full list has 50 repos in 9 categories, from databases and AI tooling to CRMs, security scanners and free resource lists. Each entry says what it does, what it replaces and what to check before you build on it.
?Which of these repos has the most stars?▾
On 21 Oct 2026, Public APIs led with 491,066 stars, then System Design Primer with 375,005 and roadmap.sh with 369,907. The top four are all lists and learning material rather than software. The most starred software repo is n8n, with 208,229.
?Are open source repos safe to use in a commercial product?▾
Mostly yes, with one check: read the licence. Permissive licences such as MIT, Apache 2.0 and BSD let you build a business on the code. Copyleft licences such as AGPL 3.0 are fine to run internally, but ask you to share your changes if you modify the code and let others use it over a network. Source available licences, such as the Sustainable Use Licence, limit things like reselling. 31 of the 50 are permissive, and every card shows its licence. This is general information, not legal advice.
?What is the difference between open source and source available?▾
Open source means the licence meets the Open Source Initiative definition, so anyone can use the code for any purpose, including competing with its author. Source available means you can read and often self host the code, but the licence restricts something, usually reselling it or running it as a service. Sentry, n8n, NocoDB and Outline are source available. Sentry says on its own licensing page that its Functional Source Licence is not an OSI approved open source licence.
?What does open core mean?▾
An open core project publishes a free core and keeps some features, usually single sign on, audit logs and advanced permissions, under a paid licence in the same repo or a separate one. 9 of the 50 are open core, including PostHog, Langfuse, Infisical and Chatwoot. The free core is usually enough for a startup. Check which features you need before you rely on one.
?Should a startup self host these tools or pay for the cloud version?▾
Pay for the hosted version first for anything that touches uptime, customer data or security. Self host when the bill, a data residency rule or a licence limit makes it worth the work. Self hosting trades a monthly fee for your time, because backups, upgrades and security patches become yours. Tools like Coolify and Dokploy make that cheaper, but they do not make it free.
?Which of these replace Firebase, Retool, Zapier or Airtable?▾
Firebase: Supabase, PocketBase or Appwrite. Retool: Appsmith or ToolJet. Zapier and Make: n8n. Airtable: NocoDB. The alternatives table on this page lists 20 paid tools with their open options, including Calendly, Intercom, Jira, DocuSign and Google Analytics.
?Does a high star count mean a repo is good?▾
No. Stars measure attention, not quality, maintenance or fit. A list can have 491k stars and never run in production. Use stars to see what the field is talking about, then check the last push date, the licence, and whether the project solves a problem you actually have.
?Which of these changed licence recently?▾
NocoDB moved from AGPL 3.0 to the Sustainable Use Licence on 9 January 2026, from v0.301.0. Cal.com moved its production code to a private repository on 15 April 2026, and the public repo became MIT under the name Cal.diy. Dokploy moved to plain Apache 2.0 in January 2026, with a separate source available licence for future paid features. Open WebUI added a branding clause from v0.6.6.
?How were these 50 chosen, and how current are the star counts?▾
We started from 107 candidates across eight problem areas, kept repos with recent activity, a licence we could read and a clear use for a small team, and ranked them by stars on 21 Oct 2026. Counts come from deps.dev and ungh.cc, so they can differ slightly from GitHub's live number. Licences were read from each project's own pages.
?Can I download this list?▾
Yes. The ranking, categories, stars and licences are in a JSON file at /free/best-github-repos-for-startups.json. It is free to reuse with credit under CC BY 4.0.
