Open Source (MIT)
$0
Forever
- Full UI + all features
- Multi-user RBAC + LDAP/SSO
- 9+ vector DB integrations
- Self-host with Docker on any infrastructure
Open WebUI — No-Code AI Builders Platform
Free open-source (MIT)
What is Open WebUI?
Open WebUI is an extensible, feature-rich, self-hosted AI platform designed to operate entirely offline. With 124,000+ GitHub stars and 282 million+ downloads (as of 2026), it's the most-deployed self-hosted ChatGPT alternative — adding everything Ollama's CLI lacks: conversation history, file uploads for document chat (RAG), web search integration, multi-user accounts with permissions, voice input/output, model switching mid-conversation, and custom system prompts.
Out of the box, Open WebUI in 2026 supports 9+ vector databases for RAG (Chroma, Qdrant, Milvus, Weaviate, etc.), 15+ web search providers, voice input/output, MCP server integration, multi-user RBAC, LDAP/SSO, and native Python function tools. Image generation works through DALL-E, Gemini, ComfyUI (local), and AUTOMATIC1111 (local). Database options include SQLite (with optional encryption), PostgreSQL, or cloud storage backends (S3, GCS, Azure Blob).
Open WebUI is fully free under MIT and self-hostable on any infrastructure. The project's killer combination is enterprise-grade features (RBAC, SSO, audit-friendly architecture) packaged as a single self-hosted Docker container — a tier of polish that hasn't been available before in the OSS ChatGPT-clone space. Best paired with Ollama for fully local AI.
Key features
Core capabilities this platform advertises.
- Self-hosted ChatGPT-style UI for Ollama + OpenAI-compatible APIs
- RAG with 9+ vector databases (Chroma, Qdrant, Milvus, Weaviate)
- 15+ web search providers, voice I/O, MCP server integration
- Multi-user RBAC, LDAP/SSO, audit-friendly architecture
- Image generation via DALL-E, Gemini, ComfyUI, AUTOMATIC1111
Strengths and tradeoffs
What this tool does well, and the limitations to keep in mind.
Pros
- Most-deployed self-hosted ChatGPT clone — 282M+ downloads
- Genuinely enterprise-grade: RBAC, SSO, multi-user from day one
- Massive feature set, all in one Docker container
- MIT license — fully free and modifiable
- Pairs perfectly with Ollama for local-only AI
Cons
- Self-hosting requires infrastructure expertise
- Heavy feature surface can overwhelm casual users
- Less polished than commercial UIs like ChatGPT
- Performance depends on chosen LLM backend
Plans & pricing
What's included in each plan, and how the tiers compare.
Common use cases
Teams and individuals running self-hosted AI — privacy-conscious developers, regulated industries, and on-prem AI deployments
- Self-hosted private ChatGPT replacement for enterprises
- On-prem RAG with internal documents
- Multi-user team-level AI deployments with permissions
- Air-gapped AI environments (regulated industries)
- Local AI workflows powered by Ollama
Best Open WebUI alternatives & competitors
Top companies in No-Code AI Builders you can use instead of Open WebUI.
Replit
v0
Lovable
Bolt.new
Create
Base44
Natural language to full-stack app
Voiceflow
Visual conversation design canvas
Botpress
Open-source chatbot platform
Langflow
Flowise
Open-source visual LLM workflow builder
Stack AI
Marblism
Pickaxe
Relevance AI
AI workforce platform
Wordware
Sparkles
Edit existing codebases
Glue
Infinite design canvas
Rivet
Compare Open WebUI
Side-by-side comparisons with other tools in this category.
Best integrations for Open WebUI
Companies from adjacent layers in the AI stack that work well with Open WebUI.
Last verified: April 29, 2026