Supabase
Open-source Firebase alternative: Postgres, auth, and storage.
Free + paid
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GitHub picks
Strong open-source projects save months of wheel-reinvention: backends, UI kits, workflow automation, and local LLMs — mostly free to self-host. We list repos that matter most to indie developers and early teams, with a one-line note on when each fits. Open source is not zero maintenance — check licenses, community health, and stack fit. If you are deciding whether a technical direction is worth building, run a sourced validation report on StartupSense first.
shadcn/ui
Copy-paste React components to ship polished UIs fast.
Free
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Dify
Open LLM app platform with visual workflow builder.
Free + paid
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n8n
Open workflow automation connecting APIs and services.
Free + paid
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Third-party service — not operated by StartupSense
Ollama
Run open-source LLMs locally with one command.
Free
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LangChain
Mainstream framework for building LLM applications.
Free + paid
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Excalidraw
Hand-drawn style whiteboard for architecture and wireframes.
Free
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AppFlowy
Open-source Notion alternative you can self-host.
Free + paid
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Plausible
Privacy-friendly open analytics.
Free + paid
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Cal.com
Open scheduling (Calendly alternative).
Free + paid
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Third-party service — not operated by StartupSense
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