Discover/Vapi vs Open WebUI

Vapi

VS

Open WebUI

Vapi vs Open WebUI

An in-depth comparison of Vapi and Open WebUI — pricing, features, ratings, and more.

Vapi

4.1

★★★★★

2 reviews

Higher rated

Open WebUI

4.1

★★★★★

5 reviews

Side-by-Side Comparison

Vapi

Open WebUI

Category

AI Agent

AI Agent

Pricing

Free tier ($10 credit); pay-as-you-go at $0.05/minute base

Free

Pricing model

freemium

free

Rating

4.1 ★

4.1 ★

Reviews

2

5

Platforms

Web, API

Web, API

API Access

✓ Yes

✓ Yes

Open Source

✗ No

✓ Yes

Key Features

Vapi

✓ Real-time voice AI
✓ Phone call integration
✓ Custom LLM support
✓ ElevenLabs voice integration
✓ Tool calling in voice
✓ Web and phone call support
✓ Dashboard and analytics

Open WebUI

✓ 138,035 GitHub stars
✓ Python codebase
✓ Topics: ai, llm, llm-ui, llm-webui, llms

Pros & Cons

Vapi

Pros

+ Excellent developer experience
+ Supports custom LLMs and voices
+ Low latency
+ Good documentation

Cons

− Requires developer knowledge
− Costs add up at scale
− Voice quality depends on chosen provider

Open WebUI

Pros

+ Strong public repository signal
+ Open-source code can be reviewed directly

Cons

− Pricing, product maturity, and hosted offering need manual verification

Try Vapi → Vapi Details

Try Open WebUI → Open WebUI Details