The Voice AI OS

Voice agents worth picking up for.

Build it, put it on a real phone number, and make it flawless — all in one place. Gradient is the fastest way to ship a voice agent your customers actually want to talk to.

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A row of radio telescope dishes across an open plateau at dusk
How it works

One place, from first word to live call.

No stitching a builder, telephony, evals and logs across four tabs. Everything your voice agent needs lives on one platform — which is exactly why it sounds faster and more human.

01
Nothing to stitch together

Tools, skills and knowledge bases bind to the step that needs them — and telephony is already wired.

02
Never ship blind

Every call becomes a trace, live customer traffic included. Rubrics score it rule by rule, matched by scenario.

03
Never break production

Versions pin to a phone number. The one answering calls doesn't change until you publish.

Observability

Every call, in one place.

Live calls, eval runs and test calls land in one log — the four tabs you used to juggle, unified. Every one is captured in full and graded against the same rubric.

Transcript
Booking agent
Reschedule appointment
09:41:02
Hi — I need to move my appointment on Thursday.
09:41:06
Of course. Let me pull that up.
09:41:07
lookup_appointment142ms
09:41:09
I have you at 9:15 on Thursday. What time works better?
09:41:15
Could we do the afternoon? Around 3:30.
09:41:19
You're all set for Thursday at 3:30. Anything else?
Rubric111
Evaluation
Existing patient wants to reschedule
Looked up the existing appointment first
Confirmed a time it never actually booked
Collected new-patient insurance · different scenario
Pricing

One platform fee. Usage included.

Every plan bundles conversation minutes and traces — every call, test and eval, recorded and scored. Go past either and the overage rate drops as you grow. Seats, agents, versions, scenarios and rules are always unlimited.

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Free
$0/ month

For building your first agent and testing it end to end.

Minutes100/mo, then $0.25/min
Traces1,000/mo, then $10/1k
  • Unlimited agents and teammates
  • Unlimited phone numbers
  • Traces, evals and voice testing
  • Community support
Team
$99/ month

For teams with agents answering real customers.

Minutes1,500/mo, then $0.12/min
Traces50,000/mo, then $4/1k
  • Unlimited agents, versions and teammates
  • Unlimited phone numbers
  • Live monitoring and voice testing
  • Priority support
Scale
$499/ month

For production volume across several agents.

Minutes10,000/mo, then $0.09/min
Traces500,000/mo, then $2/1k
  • Everything in Team
  • SSO, audit logs and 99.9% SLA
  • Up to 200 concurrent calls
  • Dedicated support
Enterprise

Annual commit with a negotiated per-minute rate, a dedicated engine, bring-your-own model keys, and solutions engineering.

Talk to sales
Minutes

Connected audio, billed by the second — model, speech and telephony included. No charge for silence or failed calls.

Traces

Every call, test and eval is recorded and scored against your rubrics. Metered per 1,000; standard retention included.

Always free

Unlimited seats, agents, scenarios and rules. Phone numbers billed per number. You only pay for minutes and traces.