What is Ultravox.ai?
Real-time voice agents through developer APIs.
Who is Ultravox.ai best for?
Ultravox.ai is best for developers building real-time voice agents for phone lines or apps through an API.
Phone and web voice agents
REST APIs, SDKs for web and mobile and built-in telephony integrations cover inbound and outbound calls without stitching several vendors together.
Conversations that need to feel quick
Its model listens to the audio itself instead of transcribing it first, which cuts a step of delay and keeps tone and pacing in play.
Trying an agent before paying
New accounts get 30 free call minutes, and test calls in the web playground are never charged.
Outbound calling at volume
Pro lifts the 5-call limit and adds a scheduler that runs batches of outbound calls with retries.
How much does Ultravox.ai cost?
Ultravox.ai gives new accounts 30 free call minutes, then charges $0.05 a minute on Pay As You Go, and its Pro plan costs $100 a month billed yearly and removes the 5-call concurrency cap.
- 30 free call minutes, then $0.05 a minute
- Up to 5 calls at once
- Unlimited test calls in the playground
- No hard cap on calls at once
- Outbound call scheduler, 5 custom voices, 20 RAG corpora
- Calls still cost $0.05 a minute
Ultravox lists Pro only at its yearly rate and shows no month-to-month price. Enterprise is priced on request and adds a priority SLA and org support. SIP calls add 0.5 cents a minute on Pay As You Go and 0.48 cents on Pro. Threads, which run background agent work during a call, cost $2 per million uncached input tokens and $15 per million output tokens, with cached input free. Calls are billed in six-second steps. The docs also mention a Scale plan with priority for up to 100 calls at once, which the pricing page does not list. Full pricing on ultravox.ai. We checked these prices on .
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What are the best Ultravox.ai alternatives?
Two tools on Recaply do Ultravox.ai's job.
Questions about Ultravox.ai
What is Ultravox.ai?
Real-time voice agents through developer APIs.
Who is Ultravox.ai for?
Ultravox.ai is best for developers building real-time voice agents for phone lines or apps through an API.
Is Ultravox.ai free?
Only to start. Ultravox.ai gives every new account 30 free call minutes, and test calls in its web playground stay free. After that, calls cost $0.05 a minute on the Pay As You Go plan, which has no monthly fee but caps you at 5 calls at once.
How much does Ultravox.ai cost?
Ultravox.ai's paid plans are Pro at $100 per month, billed yearly.
What are the best Ultravox.ai alternatives?
The closest alternatives on Recaply are Vapi and Grok Voice Agent.
Where can I try Ultravox.ai?
On its official website, ultravox.ai.
How does Ultravox.ai bill for short calls?
Ultravox.ai bills calls in six-second steps, so the $0.05 per minute rate works out to $0.005 for every six seconds of talk. Pay As You Go usage is invoiced monthly after the fact, while Pro subscribers pay for their plan at the start of each period.
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