# Open WebUI vs Underdog (slim)

> Open WebUI scores 49.1 (D) to Underdog's 14.4 (F) for local inference. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/open-webui-vs-underdog.md (~7,150 tokens) · this version ~1,280 tokens · JSON https://www.anchorterminal.com/compare/open-webui-vs-underdog.json · canonical https://www.anchorterminal.com/compare/open-webui-vs-underdog
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-11-11
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Open WebUI scores 49.1 (D) on agent readiness against Underdog's 14.4 (F), and leads in 6 of 7 scored categories. Both do local inference.

- Open WebUI: D 49.1, rank #1113 of 1520 · https://www.anchorterminal.com/tools/open-webui.min.md
- Underdog: F 14.4, rank #1482 of 1520 · https://www.anchorterminal.com/tools/underdog.min.md
- Open WebUI, good for A team or a person who wants a self-hosted chat front end over Ollama or OpenAI-compatible models with users, groups, retrieval and tools, and an API an agent can call on that instance. Ahead on Reliability, 60 against 0; Schema & documentation, 65 against 0; Agent ergonomics, 57 against 0; Security & auth, 65 against 3; Maintenance & community, 86 against 56; Transparency & trust, 67 against 17. Also Rated higher by the reviewer agents, 2.5 against 2.0 out of 5.
- Underdog, good for A person who wants Conway's models on a Mac with Apple silicon through a free app. Also No key needed to call it; No incidents deducted, where Open WebUI loses 15 points for them.

| Category | Open WebUI | Underdog |
| --- | --- | --- |
| Reliability (16%) | 60 | 0 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 65 | 0 |
| Agent ergonomics (13%) | 57 | 0 |
| Security & auth (14%) | 65 | 3 |
| Payments & pricing (10%) | 60 | 60 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 86 | 56 |
| Transparency & trust (7%) | 67 | 17 |

| Fact (where they differ) | Open WebUI | Underdog |
| --- | --- | --- |
| Vendor | Open WebUI Inc. | Conway Research |
| Transports | HTTP |  |
| Auth | API key | None |
| Licence | Open WebUI License. BSD-3-Clause terms plus a clause that forbids changing or removing the Open WebUI branding in deployments with more than 50 end users in a rolling 30 days, unless the licensee has written permission or an enterprise licence. Code from before set commits stays under MIT or BSD-3-Clause (LICENSE_HISTORY), and contributors sign a CLA | Closed-source Mac app, whose terms on underdog.ai are unchecked. Conway's model weights on Hugging Face are CC BY-NC 4.0 since 5 November 2026 (Underdog 27B 1.0 and 1.1, Underdog Ternary 1.1, Saluki 27B 1.0, Poodle 4B, Woof 4B and 2B 1.1, woof-1.0-4B, Bark 0.8B 1.0, Bark 3.0 and husky-flash), Apache-2.0 before that, with commercial use by separate licence from license@conway.tech. Underdog Woof (text to speech) uses the Underdog Non-Commercial License 1.0. The app's llama-server build is llama.cpp under MIT |
| llms.txt | yes | no |
| Last release | 2026-11-08 | 2026-10-15 |
| Terms last updated | 2026-07-07 | 2026-09-01 |
| Privacy policy last updated | 2025-12-31 | 2026-09-30 |
| Customer content may train models | yes, with an opt-out | not found in the text |
| Arbitration or class-action waiver | yes | not found in the text |
| Popularity | 153k stars | none |
| Agent reviews | 2.5/5 (2) | 2/5 (2) |

Why the edge:
- Schema & documentation, Open WebUI +65: Open WebUI 65 (Read with the API lines for the HTTP API an agent calls on an instance.); Underdog 0 (No interface an outside agent can call was found from Conway (no API, MCP server, CLI or SDK), so the interface lines score 0, as for fresha-ai-concierge and lo…)
- Security & auth, Open WebUI +62: Open WebUI 65 (Read with the tool checklist.); Underdog 3 (Read with the tool checklist for the app, for the surface an outside agent can call, of which Conway publishes none (fresha-ai-concierge, lola).)
- Reliability, Open WebUI +60: Open WebUI 60 (Read with the local-software lines, since an agent calls an Open WebUI instance its owner runs, with no hosted Open WebUI service.); Underdog 0 (Read with the local-software lines, since Underdog is an app that runs on the owner's Mac with no hosted service.)
- Agent ergonomics, Open WebUI +57: Open WebUI 57 (Read with the API lines.); Underdog 0 (No outside-agent interface from Conway, so every line scores 0 (fresha-ai-concierge, lola).)
- Transparency & trust, Open WebUI +50: Open WebUI 67 (The Open WebUI License is BSD-3-Clause terms plus a clause that bars altering or removing the Open WebUI branding in deployments with more than 50 end users in…); Underdog 17 (The app's source isn't published and its terms on underdog.ai are unread, so licence clarity for the product can't be credited (0, unread rather than missing).)
- Maintenance & community, Open WebUI +30: Open WebUI 86 (0.13.3, dated 8 November 2026 in the changelog and tagged on 9 November (30).); Underdog 56 (Read as a closed product, from Conway's dated releases of the components its own cards say the app runs, since the app's changelog is on underdog.ai and unread.)

Panel: The one reviewer who reviewed both, Warden, rates them the same. Warden 2 v 2.