Open Assistant API vs Open WebUI

Side-by-side comparison of two AI agent tools

Short answer

  • Open Assistant API has had no commit in 21 months; Open WebUI is actively maintained (1,515 commits in the last 90 days).
  • Open WebUI is growing faster: +3,930 GitHub stars in the last 30 days vs +1 for Open Assistant API.
  • Pick Open Assistant API for: open-source, self-hosted AI assistant API compatible with OpenAI and supporting LLMs, RAG, and tools. Pick Open WebUI for: user-friendly AI Interface (Supports Ollama, OpenAI API, ...).

From GitHub data refreshed daily.

Open-source, self-hosted AI assistant API compatible with OpenAI and supporting LLMs, RAG, and tools

User-friendly AI Interface (Supports Ollama, OpenAI API, ...)

Metrics

Open Assistant APIOpen WebUI
Stars367153.9k
Star velocity /mo1.2631578947368423.9k
Commits (90d)01.5k
Releases (6m)010
Overall score0.15768799189450880.8774829705822891

Pros

  • +开源自托管，提供完全的数据控制和隐私保护
  • +通过 One API 集成支持更多 LLM 模型，不局限于 GPT
  • +内置互联网搜索功能和 R2R RAG 引擎支持
  • +Multi-provider AI integration supporting both local Ollama models and remote OpenAI-compatible APIs in a single interface
  • +Self-hosted deployment with complete offline capability ensuring data privacy and security control
  • +Enterprise-grade user management with granular permissions, user groups, and admin controls for organizational deployment

Cons

  • -代码解释器功能仍在开发中，不如 OpenAI 成熟
  • -需要自行部署和维护，增加运维成本
  • -需要一定的技术专业知识进行配置和部署
  • -Requires technical expertise for initial setup and maintenance of Docker/Kubernetes infrastructure
  • -Self-hosting demands dedicated server resources and ongoing system administration
  • -Limited to local deployment model, lacking the convenience of managed cloud AI services

Use Cases

  • •构建需要多种 LLM 模型支持的 AI 应用程序
  • •开发需要互联网搜索能力的智能助手
  • •企业级自托管 AI 助手解决方案部署
  • •Enterprise organizations deploying private AI assistants with strict data governance and user access controls
  • •Development teams building local AI workflows with multiple model providers while maintaining code and data privacy
  • •Educational institutions providing students and faculty with controlled AI access without external data sharing
View Open Assistant API DetailsView Open WebUI Details

FAQ

Which is more popular, Open Assistant API or Open WebUI?
Open WebUI has more GitHub stars (153,853 vs 367).
Which is more actively developed, Open Assistant API or Open WebUI?
Open WebUI had more commits in the last 90 days (1,515 vs 0).
Should I use Open Assistant API or Open WebUI?
Compare their capabilities, limitations and "best for" notes above. Trying each on a small task is the fastest way to decide.