Build AI Voice Agents that
Build AI voice agents trained on your data. Deploy to real phone numbers in minutes and handle every call, 24/7.
Persistence Agent
Cathy Sales Representative
0%
Answer rate
0min
Setup time
0ms
Avg latency
0/7
Always on
Build
Design an agent with the visual flow builder or a single prompt. Connect your knowledge base and define actions no engineering required.
Test
Simulate hundreds of calls before going live. AI callers run your agent through edge cases and accents so issues surface early.
Deploy
Assign a phone number and activate in one click. Use your SIP trunk, provision a new number, or trigger calls via API.
Improve
Track containment, conversion, sentiment, and latency in real time, with AI suggestions on exactly what to fix.
Visual Flow Builder
The Agent Builder Module You Designed
AI Testing / QA
Simulate Calls Before Launch
Knowledge Base
No Hallucinations
Voice Library
50+ Languages, 100+ Voices
Single Click Phone Number
Buy Or Use SIP Trunking
Outbound Batch Calling
At Scale
POWERFUL INTEGRATIONS
Seamlessly Integrate Every App You Use
What struck me most was not just the technology or the demos, but the quality of thinking, curiosity, and depth that you and your team brought into every conversation. I was genuinely impressed by the incredibly talented team you have built.
Working with Persistence AI has been an excellent experience. The platform is thoughtfully built and the team truly understands what enterprises need. Having a great time collaborating with such a passionate and talented group.
Persistence AI stands out for its depth of thinking and quality of execution. It's rare to see a product that solves real problems so elegantly. An excellent company to work with — the team is top-notch.
Trust and reliability
Frequently asked questions
The questions teams ask before putting a voice agent on a real phone line.
What is an AI voice agent?
An AI voice agent answers and makes phone calls on your behalf. It listens to the caller, understands what they want, responds in a natural voice, and can act during the call — looking up an order, booking an appointment, or routing to a person when it should. Unlike a traditional IVR, callers speak normally instead of navigating a menu.
How does an AI voice agent actually work?
Three stages run in a loop while the call is live. Speech-to-text transcribes what the caller says as they say it. A language model works out what they want and decides how to respond, using your knowledge base and any systems it is connected to. Text-to-speech turns that response back into audio. The hard part is not any one stage but the timing between them — a caller reads even a short delay as a broken line, which is why turn-taking and latency matter more than raw model quality.
Can it replace our existing IVR?
Yes, and that is one of the most common reasons teams start. Instead of pressing 1 for sales and 2 for support, callers say what they need in their own words and the agent routes or resolves it directly. You can keep your existing numbers by connecting them over SIP trunking, so the switch does not change what customers dial. Most teams move one or two intents across first and expand once they can see how those calls actually go.
How long does it take to launch an agent?
Most teams get an agent answering a real phone number the same day. Our build-along walkthrough takes one from empty to live in a single sitting, so you can judge the effort before committing an afternoon to it.
Can I use my existing phone number?
Yes. You can buy a number through Persistence or connect an existing one over SIP trunking, so you keep the number your customers already know.
What languages and voices are supported?
Persistence supports 50+ languages and 100+ voices. Which voice you pick matters more than most teams expect — pacing and warmth affect whether callers stay on the line, so it is worth testing a few against real calls rather than choosing by preview clip.
How is our data handled?
Every call produces a recording and a transcript, and those hold whatever the caller volunteered — names, addresses, account details. You control what is retained and for how long, and sensitive values can be redacted. Regulated deployments are common here; healthcare has the strictest requirements and we have written up what handling patient data on a voice agent actually involves. The compliance frameworks we work to are listed in the trust section above.
How does pricing work?
Current plans and rates are listed on the pricing page, which is the place to check rather than any figure quoted elsewhere. If you are still working out whether the numbers stack up against your existing call handling costs, we have a breakdown of what drives the cost of a voice bot and how to compare it against what you spend today.
