Voice engine for regulated software
Voice AI that doesn't talk over you.
A modular voice engine your product can embed through one API. Fast reactions, natural speech, runs in your own environment.
Try to interrupt it
Agent speaking
Stride AI
Silent0.00 sstops in 0.20 s
Agent:
Moshi (open-source baseline)
Silent0.00 sstops in 1.21 s
Agent:
Press the button the way a caller would cut in. Watch how long each agent keeps talking after it hears you.
Simulation based on our internal benchmark measurements, not a live call.
Key benchmark figures
Time to stop
0.20 s
when the caller interrupts
(Moshi: 1.21 s)
Stopped within 1 second
23 of 23
mid-sentence interruptions
(Moshi: 6 of 18)
Speech quality
4.16
UTMOS scale 1-5
(Moshi: 3.59)
Audio glitches
0 of 60
runaway audio tails in test sessions
First internal benchmark, October 2026. Single-GPU test environment, small sample. Network delay not included.
Modular by design
Modular by design, not a black box.
Speech recognition, the language model and voice synthesis are separate parts. You choose the models, run them in your own environment, and connect the agent to your internal systems.
- 01
Turns the caller’s audio into text; swap in the recognizer that fits your languages and domain vocabulary.
Configuration in our benchmark
faster-whisper large-v3-turbo
- 02
Decides what to say; choose your own model and connect the agent to internal systems like case files or scheduling.
- 03
Speaks the answer, streaming first audio before the full reply is written.
Latency breakdown
Where the response time goes.
From the caller going quiet to the first audio of the answer. Move the silence buffer to see the trade-off.
Total response start
0.94 s(median, 60 trials)
- Silence buffer
- 0.40 s
- Speech-to-text
- 0.10 s
- Language model first words
- 0.18 s
- Voice model first audio
- 0.24 s
Safer.The agent rarely cuts in on a caller who is still finishing a sentence.
Stage times are approximate. The right setting depends on the use case, for example a fast intake line or a careful legal consultation.
Benchmark, Oct 2026
Stride AI vs Moshi, side by side.
Moshi is an end-to-end open-source voice model. We ran both on the same scripted conversations.
Share of mid-sentence interruptions
- Stride AI
- 100%(23 of 23)
- Moshi
- 33%(6 of 18)
| Metric | Moshi | Stride AI |
|---|---|---|
| Time to stop when interrupted | 1.21 s | 0.20 s (better) |
| Slowest response start (60 trials) | 5.6 s | 1.3 s (better) |
| Full answer ready, median | 2.5 s | 2.1 s (better) |
| Speech quality (UTMOS) | 3.59 | 4.16 (better) |
| Median time to start answering | 0.14 s | 0.94 s |
Moshi starts answering sooner on a typical turn. We chose a deliberate pause so we don't talk over callers.
Roadmap
Next validation priorities
P01
Larger interruption test set
50 to 100 trials planned
P02
Latency with database lookups
Retrieval and tool calls in the loop
P03
Accuracy on real call recordings
Including accented speech and noisy audio
P04
Human listening tests
Run alongside the automated scores
P05
Compliance requirements
Worked through together with design partners
Design partners get a say in which benchmark we run next.
Pricing
Plans that scale with your calls.
Plan | Price | What's included | Built for |
|---|---|---|---|
| Developer | $49/ mo |
| Developers and micro projects |
| Growth / Scale | $299/ mo |
| Growing SaaS & AI startups |
| Enterprise | Custom |
| Large-scale companiesBook a Technical Call |
Developer
$49/ mo- 1,500 voice minutes
- Sub-160ms latency
- Standard support
Built for: Developers and micro projects
Growth / Scale
$299/ mo- 10,000 voice minutes
- Dynamic noise tracking
- Priority API access
Built for: Growing SaaS & AI startups
Enterprise
Custom- Dedicated infrastructure
- Custom SLA (99.9%)
- On-prem / Private cloud
Built for: Large-scale companies
Book a Technical Call
Build with us
Build voice features with us.
We are opening a small cohort for teams building voice features in legal, healthcare or operations software. Partners get early access, direct input on the roadmap, and a say in which benchmarks we run next.
- 1
Review the results
Review the results and tell us which metrics matter for your use case.
- 2
Share your thoughts
Share your thoughts in writing or on a short call.
- 3
Sign a short letter of intent
If there is mutual interest, sign a short non-binding letter of intent. No financial commitment or legal obligation.
Get in touch
Let's talk about your voice features.
We’d love to learn more about your product. Let’s integrate a trial API key specifically tailored for your system so we can continuously update and refine the model based on your feedback. This way, you’ll be one of the very first teams to experience and use it.
Full methodology
Download the full benchmark report (PDF)Prefer email? hello@heystride.co
We reply within two business days.
FAQ