head to head · open source
Dify vs Foundry
Dify has 156,167 GitHub stars, 24,658 forks, 1,067 open issues and last shipped yesterday. Foundry has 872 stars, 129 forks, 5 open issues and last shipped 29 days ago. Dify leads on adoption by 17,809% (156,167 vs 872 stars). Dify is written in TypeScript under a custom or non-standard licence; Foundry is written in Python under Apache-2.0. Dify has attracted 16% as many forks as stars, Foundry 15%. Dify was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (agentic-ai, ai), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| Dify | Foundry | |
|---|---|---|
| GitHub stars | ★ 156K | ★ 872 |
| License | Custom / other | Apache-2.0 |
| Written in | TypeScript | Python |
| Last push | 2026-09-17 | 2026-08-20 |
| Forks | ⑂ 25K | ⑂ 129 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Dify if
- You weight community size — 156K stars and counting
- You want the Custom / other license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick Foundry if
- You want the Foundry feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Python
- You evaluated both and Foundry fits your workflow better
About Dify
Dify is an open source LLM application development platform built in TypeScript. It provides a visual interface for designing, testing, and deploying AI workflows, RAG pipelines, and agentic systems without writing extensive code. The platform lives in the generative AI development ecosystem and targets teams needing to move from prototype to production using consistent tooling across environments.
About Foundry
Foundry is a Python, Apache 2.0 licensed agentic engineering framework from Promptise that gives developers one install for building AI agents, the tools they call, the reasoning they follow, and the governed runtime that serves them to customers.
read the full Foundry overview →
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Frequently asked questions
Is Dify or Foundry more popular?
Dify has 156,167 GitHub stars and Foundry has 872. Dify has the larger community by that measure.
Are Dify and Foundry free?
Both are open source. Dify has no licence declared in this registry, and Foundry is licensed under Apache-2.0. Both are free to self-host.
What is the difference between Dify and Foundry?
Dify is written in TypeScript and Foundry in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Dify or Foundry?
Choose Dify if you want the larger community (156,167 stars) or its Custom / other licence terms. Choose Foundry if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.