Top use cases
Build a calling agent
Use the REST APIs to create a voice agent that talks with customers in real time.
Schedule outbound calls
Run outbound campaigns with the Outbound Call Scheduler on the Pro plan.
Answer from your documents
Give an agent your own documents using corpora for RAG.
Ultravox FAQs
What is Ultravox?
Ultravox is a speech-native voice AI platform with APIs for building real-time voice agents. Ultravox provides developer APIs and SDKs for building voice agents on its own speech model. It has built-in integrations with large telephony providers.
Is Ultravox free?
Ultravox offers a free trial instead of a free plan (first 30 minutes of calls free). Paid pricing: Pay as You Go at $0.05 per minute after 30 free minutes.
How much does Ultravox cost in India?
Ultravox pricing: Pay as You Go at $0.05 per minute after 30 free minutes. Prices on the official site are in US dollars. Prices can change, so check ultravox.ai for the latest pricing.
What is Ultravox best for?
Ultravox is best for developers building voice agents. People use it to build a calling agent, schedule outbound calls and answer from your documents.
How to build a calling agent with Ultravox?
With Ultravox, you can use the REST APIs to create a voice agent that talks with customers in real time.
How to schedule outbound calls with Ultravox?
With Ultravox, you can run outbound campaigns with the Outbound Call Scheduler on the Pro plan.
How to answer from your documents with Ultravox?
With Ultravox, you can give an agent your own documents using corpora for RAG.
What are the best Ultravox alternatives?
Popular alternatives in Voice Agents include Vapi, Retell AI, Bland AI and Synthflow. Each has its own free plan and price, so compare them on the tool pages.
Where can I sign up for Ultravox?
On its official website, ultravox.ai.
When were Ultravox's price and features last checked?
We checked them on the official site on 4 November 2026. Plans change often, so confirm the latest price on ultravox.ai before you pay.