Langchain-Chatchat vs Onyx (formerly Danswer)
Short answer
Langchain-Chatchat: Chinese-first local knowledge-base Q&A and agent app built on LangChain, wired to local model servers. Onyx (formerly Danswer): AI chat and enterprise search connected to 50+ workplace apps. Both are in our Knowledge base & RAG category.
Choose Langchain-Chatchat if you want: fewer license conditions (Permissive vs Open core).
Choose Onyx (formerly Danswer) if you want: an actively maintained project (Langchain-Chatchat is stale).
Langchain-Chatchat publishes no official RAM figure, so we cannot compare hosting cost directly.
Last updated · computed from each project's official docs and live GitHub data · sources
Langchain-Chatchat vs Onyx (formerly Danswer) side by side
| Langchain-Chatchat | Onyx (formerly Danswer) | |
|---|---|---|
| Category | Knowledge base & RAG | Knowledge base & RAG |
| What it is | Chinese-first local knowledge-base Q&A and agent app built on LangChain, wired to local model servers. | AI chat and enterprise search connected to 50+ workplace apps. |
| License | Apache-2.0 | MIT (Community Edition) + Onyx Enterprise License (ee directories) |
| License type | Permissive | Open core |
| License conditions | Permissive. Internal and commercial use allowed. Models keep their own licenses. | The Community Edition is MIT. Code in "ee" directories is under the Onyx Enterprise License. |
| Status | Stale (no commit in 180+ days) | Active |
| GitHub stars | 38.7k | 33.1k |
| Last commit | Nov 10, 2025 | Oct 31, 2026 |
| Latest release | v0.3.1 | v5.0.3 |
| Minimum hardware | Not published | 4 vCPU · 10 GB RAM · 32 GB disk |
| Recommended hardware | Not published | 8 vCPU · 16 GB RAM · 500 GB disk |
| RAM measured by us | Not tested yet | Not tested yet |
| GPU | Not required by the app itself. Since 0.3.0 hardware depends on the model server you connect; the docs say it can run on CPU, GPU, NPU or MPS. The Docker Compose guide pairs it with Xinference and assumes the NVIDIA Container Toolkit. | Not required / not stated |
| Est. server cost | Not estimated | from €69.99/mo |
| Deploy method | pip (or Docker Compose with Xinference) | Install script (Docker Compose) |
| Known gotchas | 5 listed | 4 listed |
| Telemetry | Not documented | On by default |
| Calls home by default | Not documented | Not documented |
| SSO (OIDC / SAML / LDAP) | Not documented | Not documented |
| Audit log | Not documented | Not documented |
| RBAC | Not documented | Paid / enterprise only |
| Details | Full Langchain-Chatchat guide → | Full Onyx (formerly Danswer) guide → |
Key differences
- License: Langchain-Chatchat: Apache-2.0 (Permissive). Onyx (formerly Danswer): MIT (Community Edition) + Onyx Enterprise License (ee directories) (Open core).
- Official hardware: Langchain-Chatchat: not published. Onyx (formerly Danswer): minimum 4 vCPU · 10 GB RAM · 32 GB disk (recommended 8 vCPU · 16 GB RAM · 500 GB disk).
- GPU: Langchain-Chatchat: optional / see notes. Onyx (formerly Danswer): not required or not stated.
- Est. server cost: Langchain-Chatchat: not estimated (no official RAM figure). Onyx (formerly Danswer): from €69.99/mo.
- Deploy: Langchain-Chatchat: pip (or Docker Compose with Xinference) · multi-container stack. Onyx (formerly Danswer): Install script (Docker Compose) · multi-container stack.
- Status: Langchain-Chatchat: Stale (no commit in 180+ days). Onyx (formerly Danswer): Active.
- GitHub stars: Langchain-Chatchat: 38.7k. Onyx (formerly Danswer): 33.1k.
- Last commit: Langchain-Chatchat: Nov 10, 2025. Onyx (formerly Danswer): Oct 31, 2026.
- Latest release: Langchain-Chatchat: v0.3.1 (Jul 12, 2024). Onyx (formerly Danswer): v5.0.3 (Oct 30, 2026).
Same for both: Category: Knowledge base & RAG.
Langchain-Chatchat vs Onyx (formerly Danswer): FAQ
Langchain-Chatchat or Onyx (formerly Danswer): which should a small business choose?
Choose Langchain-Chatchat if you want: fewer license conditions (Permissive vs Open core). Choose Onyx (formerly Danswer) if you want: an actively maintained project (Langchain-Chatchat is stale). Langchain-Chatchat publishes no official RAM figure, so we cannot compare hosting cost directly.
Which is cheaper to self-host, Langchain-Chatchat or Onyx (formerly Danswer)?
Langchain-Chatchat: not estimated (no official RAM figure). Onyx (formerly Danswer): from €69.99/mo. Our estimate is the cheapest Hetzner Cloud plan that meets each project's official RAM and vCPU figure; it covers the server only.
How much hardware do Langchain-Chatchat and Onyx (formerly Danswer) need?
Langchain-Chatchat: not published. Onyx (formerly Danswer): minimum 4 vCPU · 10 GB RAM · 32 GB disk (recommended 8 vCPU · 16 GB RAM · 500 GB disk).
What is the license difference between Langchain-Chatchat and Onyx (formerly Danswer)?
Langchain-Chatchat: Apache-2.0 (Permissive). Permissive. Internal and commercial use allowed. Models keep their own licenses. Onyx (formerly Danswer): MIT (Community Edition) + Onyx Enterprise License (ee directories) (Open core). The Community Edition is MIT. Code in "ee" directories is under the Onyx Enterprise License. This is a summary, not legal advice.
Is Langchain-Chatchat or Onyx (formerly Danswer) more actively maintained?
Langchain-Chatchat: Stale (no commit in 180+ days), last commit Nov 10, 2025. Onyx (formerly Danswer): Active, last commit Oct 31, 2026. GitHub data refreshed Oct 31, 2026.
Which is easier to deploy, Langchain-Chatchat or Onyx (formerly Danswer)?
Langchain-Chatchat installs via pip (or Docker Compose with Xinference) (multi-container stack); Onyx (formerly Danswer) via Install script (Docker Compose) (multi-container stack). Langchain-Chatchat lists 5 known gotchas and Onyx (formerly Danswer) lists 4; see each app page.
Related
- Langchain-Chatchat self-hosting guide · Onyx (formerly Danswer) self-hosting guide
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Sources
- Langchain-Chatchat GitHub repository: github.com/chatchat-space/Langchain-Chatchat
- Langchain-Chatchat documentation: github.com/chatchat-space/Langchain-Chatchat#readme
- Langchain-Chatchat license: github.com/chatchat-space/Langchain-Chatchat/blob/master/LICENSE
- Langchain-Chatchat hardware requirements: github.com/chatchat-space/Langchain-Chatchat#0-软硬件要求
- Langchain-Chatchat deploy instructions: github.com/chatchat-space/Langchain-Chatchat#pip-安装部署
- Onyx (formerly Danswer) GitHub repository: github.com/onyx-dot-app/onyx
- Onyx (formerly Danswer) documentation, Onyx (formerly Danswer) hardware requirements: docs.onyx.app/deployment/getting_started/resourcing
- Onyx (formerly Danswer) license: github.com/onyx-dot-app/onyx/blob/main/LICENSE
- Onyx (formerly Danswer) deploy instructions: github.com/onyx-dot-app/onyx#readme
- Hetzner Cloud pricing used for cost estimates (read 2026-10-25): www.hetzner.com/cloud/regular-performance
- GitHub REST API (stars, commits, releases): docs.github.com/en/rest
Every value is generated from the same verified data as the app pages. Spotted something wrong? Tell us.