Open WebUI

license

Open-WebUI-License(BSD-3-Clause-based + non-OSI branding clause: branding may not be removed above 50 end-users/30d without enterprise license or written permission)

source

public

enterprise-tier

commercial license to remove branding

Source-available, not OSI: a branding-retention clause caps free branding removal at 50 end-users per 30 days, above which an enterprise license or written permission is required. That charges for a class of use and fails the OSS Definition, though it is widely marketed as open source. Score corrected from 3 to 2 on 2026-07-30. The software ladder has rungs at 1, 2, 4 and 5 and none at 3, so 3/source_available was not a pair any rule could produce; the ladder scores "you can read it and not run it freely" at 2.

• https://github.com/open-webui/open-webui/blob/main/LICENSE recorded 2026-06-04

  BSD-3-Clause-derived license with Section 4 branding-retention clause (<=50 users/30d), non-OSI

• https://github.com/open-webui/open-webui recorded 2026-06-04

  v0.9.6 latest release, self-hosted AI interface

~1.72M PyPI downloads last month (pypistats, primary); vendor reports 290M cumulative downloads and 420K community members. De facto leading self-hosted LLM chat UI; firmly in 1-10M band on monthly install volume (stars 140k corroborate only).

• https://pypistats.org/packages/open-webui recorded 2026-06-04

  1,717,371 downloads last month

Broadest feature surface among open self-hosted chat UIs: hits all five recipe dimensions (model breadth, RAG, multimodal, plugins, multi-user) with enterprise auth. Top-tier for the category.

• https://github.com/open-webui/open-webui recorded 2026-06-04

  feature list: RAG with 9 vector DBs, multimodal voice/image, RBAC/LDAP/SCIM/SSO, Pipelines plugins