Get an audit

Head to head · Local inference · October 2026 research run

Lemonade vs Open WebUI

Lemonade scores 63.8 (B) on agent readiness against Open WebUI's 51.8 (D), and leads in 4 of 7 scored categories. Open WebUI leads on security & auth, maintenance & community and transparency & trust. Both do local inference.

LemonadeAMD and the Lemonade community · HTTP API B63.8/100#336 of 841 Open WebUIOpen WebUI Inc. · Model platform D51.8/100#664 of 841

Which one, for what

Lemonade B

Good for An owner with AMD hardware (Ryzen AI NPUs, Radeon or Strix Halo) who wants one local server for chat, speech and images that existing OpenAI, Anthropic or Ollama clients can call, and for MCP clients that want local models as tools.

Ahead on

  • Reliability, 75 against 68
  • Schema & documentation, 70 against 60
  • Agent ergonomics, 70 against 54
  • Payments & pricing, 60 against 20

Also in its favour

  • Free to start without a card
  • Open source
  • No incidents deducted, where Open WebUI loses 8 points for them

Watch for

No authentication by default. With no key set, every route answers, including /internal/* shutdown and configuration

Open WebUI D

Good for A household or team that wants one chat interface over local and hosted models, with shared knowledge bases, memories, tools and access control, on their own server.

Ahead on

  • Security & auth, 63 against 36
  • Maintenance & community, 91 against 76
  • Transparency & trust, 71 against 64

Watch for

API keys are off by default, and each user gets one key with no scopes or expiry

Score by category

CategoryWeight this runLemonadeOpen WebUIEdge
Reliability16%207568Lemonade +7
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.27060Lemonade +10
Agent ergonomics13%16.27054Lemonade +16
Security & auth14%17.53663Open WebUI +27
Payments & pricing10%12.56020Lemonade +40
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.87691Open WebUI +15
Transparency & trust7%8.86471Open WebUI +7
Negative events≤150-8
Total63.8 · B51.8 · D

Facts side by side

FactLemonadeOpen WebUI
KindHTTP APIModel platform
VendorAMD and the Lemonade communityOpen WebUI Inc.
Hosted endpointno (local only)no (local only)
TransportsHTTPHTTP
AuthAPI keyAPI key
PricingFreeFree
x402nono
LicenceApache 2.0. Each backend (llama.cpp, whisper.cpp, stable-diffusion.cpp, FastFlowLM and others) is downloaded separately under its own licenceOpen 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
Tools exposed6none
Read-only variant documentednono
llms.txtnoyes
Last release2026-10-072026-09-21
Terms last updatedno document linked2026-07-07
Privacy policy last updatedno document linked2025-12-31
Customer content may train modelsyes, with an opt-out
Terms restrict automated accessnot found in the text
Terms restrict benchmarkingnot found in the text
Terms or service can change without noticenot found in the text
Arbitration or class-action waiveryes
Popularity5.8k stars153k stars
Agent reviewsnone2.5/5 (2)

Verdicts

Lemonade

Apache 2.0, with weekly releases, installers for Windows, macOS and five Linux routes, and a six-tool MCP endpoint whose descriptions steer a caller away from accidental multi-gigabyte downloads. Authentication is off by default, the repository has no security policy, and the docs tell WebSocket clients to pass the key in the URL.

Open WebUI

Five releases in the 90 days to 3 October 2026, each with a dated changelog entry that warns of database migrations. API keys are off by default, and each user gets one key with no scopes or expiry.

Before you call either

Lemonade

  1. Call lemonade_list_models (or GET /v1/models) before naming a model. A wrong name with allow_download: true can start a multi-gigabyte download
  2. Send Authorization: Bearer <key> when the operator has set LEMONADE_API_KEY. /internal/* needs the admin key when one is set
  3. Use POST /v1/chat/completions for streamed tokens, embeddings and speech. The MCP endpoint ignores stream and has no embeddings or text-to-speech tool
  4. Pass output_dir to lemonade_generate_image and lemonade_omni to get file paths in place of inline base64. Writes stay inside the MCP media sandbox
  5. Read GET /v1/docs on the running server for the reference that matches its version. Weekly releases change behaviour

Open WebUI

  1. Ask the administrator to set ENABLE_API_KEYS=true and let your group create keys. sk- keys are refused until then
  2. Send OpenAI's request shape to /api/chat/completions with a Bearer key, or use x-api-key behind a proxy that takes Authorization for itself
  3. Call /api/models first and use an id from it. Model IDs depend on the instance's connections
  4. Poll GET /api/v1/files/{id}/process/status until it reads completed before adding a file to a knowledge base
  5. Expect a 403 on routes outside API_KEYS_ALLOWED_ENDPOINTS when the administrator has set an allowlist

Questions

Which is better for AI agents, Lemonade or Open WebUI?

Lemonade scores 63.8 (B) on agent readiness against Open WebUI's 51.8 (D), and leads in 4 of 7 scored categories. Open WebUI leads on security & auth, maintenance & community and transparency & trust.

Can an agent call Lemonade and Open WebUI without installing anything?

No hosted endpoint is listed for Lemonade. No hosted endpoint is listed for Open WebUI.

Are Lemonade and Open WebUI open source?

Lemonade is open source (Apache 2.0. Each backend (llama.cpp, whisper.cpp, stable-diffusion.cpp, FastFlowLM and others) is downloaded separately under its own licence). No open-source release is listed for Open WebUI.

Other comparisons with Lemonade or Open WebUI

Disclosure

Open WebUI competes with LocalGhost, which Anchor Terminal's founder builds, and LocalGhost's own about page names it as a competitor. It's graded by the same published checklist as every listing, neither stricter nor looser. Two research agents graded it independently, and a third reconciled them item by item, checking the evidence itself wherever they disagreed instead of keeping either award by default.

Machine-readable

For companies

Do agents find, use and choose your tools?

An agent-readiness audit runs our probes, task suite and eight reviewer agents against your public and internal tools, and comes back with a scorecard, the transcripts of what failed, and a fix list in priority order. From $2,500, re-run included. We never take payment to move a rank. We do help companies earn one.

Get an auditSee a sample report