open-webui/open-webui
Open WebUI is the most popular self-hosted AI chat platform on GitHub, with 127,000+ stars. It runs entirely offline and connects to Ollama, OpenAI-compatible APIs, and dozens of other LLM backends — giving you a ChatGPT-like experience without sending your data to any cloud.
Why It Matters
Most AI chat tools require cloud subscriptions and send your data to third-party servers. Open WebUI breaks that dependency. Organizations with strict data privacy requirements — healthcare, legal, government, financial services — can now deploy a full-featured AI assistant on their own infrastructure with enterprise security built in: RBAC, LDAP, SCIM 2.0, SSO, and audit trails. For individuals, it means true AI ownership: run the latest open-source models locally, switch between them freely, and never pay per-token again. With 127,000 GitHub stars and 17,900 forks, Open WebUI has become the de facto standard for self-hosted AI — and its active development means it stays current with the latest models and capabilities.