AnythingLLM vs Open WebUI: which one to choose in 2026?
Both are open source alternatives to ChatGPT Plus. We compare license, tech stack and features to help you decide which fits your team best.
| AnythingLLM | Open WebUI | |
|---|---|---|
| Category | Artificial Intelligence | Artificial Intelligence |
| License | MIT | MIT |
| GitHub stars | 24k | 62k |
| Tech stack | Node.js, React, SQLite | Python, Svelte, SQLite |
| Replaces | ChatGPT Plus | ChatGPT Plus |
Open WebUI has more GitHub stars, which usually indicates a larger community (not necessarily that it's the best option for your use case).
AnythingLLM
Multi-user RAG chat over your documents, an alternative to ChatGPT Plus.
Pros
- Works with both local models and external APIs
Things to consider
- Answer quality depends on the model you connect
Open WebUI
Self-hosted chat interface for LLMs, an alternative to ChatGPT Plus.
Pros
- Runs 100% local models, no data sent to third parties
Things to consider
- Quality depends on the model you choose to run (GPU recommended)
Key features
AnythingLLM
- RAG over your own documents
- Multi-user with per-workspace permissions
- Compatible with Ollama, OpenAI and more providers
Open WebUI
- Compatible with Ollama and any OpenAI-style API
- RAG with your own documents
- User and role management
- Marketplace of community prompts and functions