Registry › Compare › CopilotKit vs Open WebUI

CopilotKit vs Open WebUI

Both are Grade A and 2.5 points apart, so choose on what you weigh most. Open WebUI leads on supply-chain integrity and transparency.

A CopilotKit 80.8

The Frontend Stack for Agents & Generative UI. React, Angular, Mobile, Slack, and more. Makers of the AG-UI Protocol

CopilotKit/CopilotKit · #155 overall · #5 UI & App Builders · coverage A (4/5)

CopilotKit doesn't lead on any scored dimension in this pair.

A Open WebUI 83.3

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

open-webui/open-webui · #116 overall · #3 UI & App Builders · coverage A (4/5)

Choose Open WebUI if supply-chain integrity and transparency matter most.

+6.6Safety / Integrity
+5.0Transparency
+1.0Adoption: 156k GitHub stars against 38.1k

Where they differ

10.3

Safety / IntegrityOpen WebUI +6.6

16.9

8.5

TransparencyOpen WebUI +5.0

13.5

20.0

MaintenanceCopilotKit +0.1

19.9

18.6

AdoptionOpen WebUI +1.0

19.6

+5.4

Runtime calibrationCopilotKit +10.0

-4.6

1 dimension identical: Identity 18.0 · Full evidence table

An independent, evidence-based trust comparison of CopilotKit and Open WebUI, two UI & App Builders projects in the HVTracker registry. Scores come from public, checkable signals — supply-chain provenance, OSSF Scorecard, maintenance, and adoption — not popularity.

Full evidence

Signal	CopilotKitCopilotKit/CopilotKit	Open WebUIopen-webui/open-webui
HVTrust score	80.8	83.3
Evidence grade	A	A
Coverage grade	A	A
Overall rank	#155	#116
Rank in UI & App Builders	#5	#3
GitHub stars	38.1k	156.0k
Last updated	today	1d ago
Build provenance	Yes	Yes
OSSF Scorecard	—	5.9 / 10
License	MIT	NOASSERTION
Downloads	472k/wk	244k/wk
Trust dimensions (points earned)
Safety / integrity / 25	10.3	16.9
Identity & provenance / 18	18.0	18.0
Transparency / 17	8.5	13.5
Maintenance / 20	20.0	19.9
Adoption / 20	18.6	19.6
Runtime capability surface (full matrix)
MCP server	Implemented	—
External providers	1 — Anthropic	8 — Amazon Bedrock, Anthropic, OpenAI, …
Requires API keys	No	Yes
Plugin surface	plugins	—
Provenance drift	Match	Unknown

Open in the live compare tool → CopilotKit profile Open WebUI profile More UI & App Builders →

How to read this: HVTrust (0–100) weighs supply-chain signals (provenance, OSSF Scorecard, signed commits, open license) alongside real-world adoption, scaled by an evidence-confidence factor. Grade bands: A ≥ 80, B ≥ 65, C ≥ 50, D < 50. Signals refresh daily. Full methodology v4.4 →