Per minute, from zero, without a call.
The floor is the barrier, not the rate. The nearest comparable vendor asks for $135 a month committed annually — $1,620 before you have processed a second of audio; two others will not tell you the price at all. Ours is on this page, the whole ladder down to $0.0005, and it starts at nothing.
Free
$0foreverFor building the thing and finding out whether it works.
- 10,000 processed minutes every month, not a trial
- All four models, no feature gating
- Instant key — no card, no call
- Full Null Test dataset and harness
- Hard concurrency cap instead of surprise overage billing
Usage
most teams$0.0010per minuteFor production traffic. The bill is the meter reading, nothing else.
- Everything in Free, plus the free 10,000 minutes each month
- Volume rates apply automatically: $0.0008 over 100k, $0.00065 over 1M, $0.0005 over 10M
- No monthly minimum, no annual commitment, no sales call
- Split-pipeline routing and shadow scoring included
- Minimum billable invoice $5/month — smaller balances accrue
Edge
$199per month, flatOn-device inference costs us nothing per minute, so we do not meter it.
- Unlimited on-device minutes, unlimited devices, commercial use
- Browser AudioWorklet and native runtimes, audio never leaves the device
- Edge Free tier at $0 for non-commercial and pre-revenue use, with attribution
- Edge + Source at $1,500/month adds vendorable ONNX weights and a redistribution grant
- Self-hosted container from $25,000/year — published, no call
| Vendor | Published terms | At 25,000 min |
|---|---|---|
| Anecho | 10,000 free, then $0.0010/min falling to $0.0005, no floor | $15 |
| LiveKit — bundled NC | Krisp NC and ai-coustics Quail L included free, if you are on LiveKit | $0.00 |
| Daily | $0.0002 per participant-minute, platform only | $5.00 |
| Agora | $0.00059/min, first 10,000 free, platform only | $8.85 |
| ai-coustics | $135/mo floor, committed annually; $0.00135 at 100k | $135 |
| LiveKit — voice isolation | $0.0012/min, metered since 1 May 2026, platform only | $30 |
| Pipecat Cloud — Krisp VIVA | 10,000 free minutes, then $0.0015/min, platform only | $23 |
| Telnyx — Krisp | $0.005 per direction, platform only | $125 |
| Krisp SDK direct | Unpublished — “Apply Now” | unpublished |
| Picovoice Koala | Unpublished — pricing page removed | unpublished |
Comparison figures are the vendors’ own published list prices, re-checked against their pricing pages on 2026-08-13 and normalised to one processed stream per minute. Read the first row honestly: basic noise cancellation is $0 and bundled on the two largest platforms, so our rate is not competing with $0.0012 — it is competing with free, conditional on being on their platform. Every cheap row here is gated on adopting a platform; every unconditional row is gated on a sales call. Two of them do not publish a price at all, which is the point.
| Minutes per month | Rate per processed minute |
|---|---|
| First 10,000 | $0.00 |
| 10,000 – 100,000 | $0.00100 |
| 100,000 – 1,000,000 | $0.00080 |
| 1,000,000 – 10,000,000 | $0.00065 |
| 10,000,000+ | $0.00050 |
Graduated, not tiered: each band is priced separately and applied automatically as your volume grows. Nobody has to ask for the discount and nobody has to negotiate it — including the bottom rate, which is the number our competitors make you call for.
Every model, on every plan.
There is no tier where the good model is hidden. The paid plans buy volume and deployment options, not access.
Clearline
primary-speaker isolation at 8 kHz, enrollment-free, streaming
Chamber
Wideband (16/48 kHz) speech enhancement + primary-speaker isolation
Onset
Voice activity detection and turn-taking
Nyquist
Call-audio quality scoring and failure prediction
| Line | Price | Why |
|---|---|---|
| Clearline — native 8 kHz + residual echo suppression | Standard ladder, no premium | It is the cheapest configuration we run and the highest-value to the buyer. Putting a surcharge on the wedge is how you fail to drive it in. |
| Chamber — wideband 16/48 kHz enhancement | Standard ladder | 48 kHz is edge-only: hosted, a 48 kHz model costs more per minute than the list price. |
| Onset — VAD and turn-taking | $0, bundled | Silero VAD is MIT and excellent. It is also the branch our own benchmark says enhancement actually helps, so it has to be bundled for the split pipeline to be the default. |
| Nyquist — call-audio scoring | $0.0004 per scored minute | Free under 100,000 scored minutes a month. |
| Null Test Private — the benchmark run on your own audio | $2,500 one-time | It converts precisely because the report sometimes says turn enhancement off. |
The things people ask before signing up.
- What counts as a processed minute?
- Wall-clock audio pushed through a session, summed across streams and rounded up per session to the nearest second. Silence counts, because the model runs on it. Sessions you open and never feed cost nothing.
- What happens when the free minutes run out?
- On a test key, sessions keep running and return the unprocessed signal, so your agent degrades to the audio it would have had without us rather than failing. On a metered key it just bills. We never auto-bill overage on a free account — a runaway loop hits a hard concurrency cap instead of generating an invoice.
- Why is there no monthly floor?
- Because the nearest comparable vendor's floor is $135 a month committed annually — $1,620 before you have processed a second of audio — and that number is what stops a developer trying the product on a Saturday. We would rather have the Saturday.
- Do I have to talk to someone to get the volume rate?
- No. The whole ladder is published and applied automatically, including the $0.0005 rate above 10 million minutes a month. That is the number our competitors make you call for.
- Do you train on my audio?
- No. Metered traffic is processed and discarded; nothing is retained for training. If you need that in writing it is in the DPA, and the on-device and self-hosted options remove the question entirely.
- Is the benchmark part of the paid product?
- No. Null Test — the dataset, the harness and every published result — is open and free, including for people who use it to argue that a competitor beats us. We sell the private run on your own audio, never the public one.
- How does on-device pricing work?
- It is flat, at $199 a month for unlimited commercial on-device minutes across unlimited devices. On-device inference costs us exactly zero per minute, per-device telemetry is unenforceable, and metering something that costs us nothing is just a reason for you to say no.