Ultravox vs Browserbase
A detailed comparison to help you choose between Ultravox and Browserbase.
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Verdict: Browserbase wins
Browserbase scores 4.0/5, edging out Ultravox at 3.8/5. AI teams and automation platforms whose agents need reliable, observable headless browsers at scale and who are willing to manage session and proxy meters to keep costs predictable.
Ultravox Real-time, speech-native voice AI | Browserbase Browser automation API for AI agents and web scraping at scale | |
|---|---|---|
| Rating | 3.8 (1 review) | 4.0 (1 review) |
| Pricing Model | paid | freemium |
| Starting Price | From $49/mo | Free tier available |
| Best For | Engineering teams building latency-sensitive voice agents who want a speech-native conversation layer with clean APIs rather than a stitched cascade. | AI teams and automation platforms whose agents need reliable, observable headless browsers at scale and who are willing to manage session and proxy meters to keep costs predictable. |
| Free Tier | ||
| API Access | ||
| Team Features | ||
| Open Source | ||
| Tags | team featuresapi access | free tierapi access |
| Visit Ultravox → | Visit Browserbase → |
Ultravox
Pros
- + Speech-native model handled interruptions and overlaps without the cascade failure I have seen in STT/LLM/TTS stacks
- + Mid-call tool execution in my test paused and resumed speech without dead-air gaps
- + Transparent metered pricing: 30 free minutes then $0.05/min, verified by third-party price tracking in August 2026
- + Open model weights (fixie-ai/ultravox) allow self-hosting for teams that need model-level control
- + RAG corpora and custom voices are configuration steps, not build steps
Cons
- - Acquired by Inworld AI on 1 October 2026 — continuity is promised but the roadmap is unwritten
- - No free plan beyond the 30-minute allowance; sustained experimentation is paid
- - Developer-only product: no visual agent studio, no templates for non-engineers
- - Pay-as-you-go caps at 5 concurrent calls, which queued my parallel test calls
- - The hosted platform (scheduler, telephony, voice management) is where the value sits, so open weights are not a free substitute
Browserbase
Pros
- + Session replay, live viewing and logs turned a failing agent step into a diagnosable one — the debugging surface is the strongest I have used in this category
- + Attaching Playwright over CDP behaved like a local browser in my runs: real rendering, cookie persistence across requests
- + Stagehand (MIT, 25k+ stars) lets agents mix natural-language actions with ordinary Playwright code, and runs locally for free before you need hosted scale
- + Itemized public pricing with a real free tier to prototype on, including $5 in model tokens and 1,000 search/fetch calls
- + Identity features (auto captcha solving from Developer tier, Verified Sessions on Scale) address the part of browser automation that actually fails in production
Cons
- - Six separately metered line items — hours, proxy GB, search, fetch, agent runs, model tokens — so the plan price is a floor, not the bill
- - Proxy sessions carry a 1 MB minimum per session; high-volume tiny sessions pay for data they never moved (~$120 per 10,000 sessions at Developer proxy rates)
- - Stealth tiering is underspecified: public docs never define what 'Basic' excludes versus Advanced/Verified on Scale
- - Free tier is a demo — 1 browser hour/month and 15-minute session caps stopped my first long test exactly at the limit
- - No local-only or self-hosted option for the hosted stack; latency variance versus local browsers is inherent to the model
Frequently Asked Questions
Which is better, Ultravox or Browserbase?▼
Browserbase scores higher at 4.0/5 vs 3.8/5 for Ultravox, making it the better-rated option in our comparison.
What is the difference between Ultravox and Browserbase?▼
Ultravox: Ultravox, formerly Fixie, is a real-time voice AI infrastructure layer for building fast, natural-sounding voice agents. Browserbase: Browserbase runs headless browsers in the cloud for AI agents and scraping, handling sessions, proxies and captchas through an API.
Is Ultravox or Browserbase more affordable?▼
Ultravox starts at €49/mo, Browserbase starts at €0/mo. Check the comparison table above for current pricing.
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