Building a 300ms speech pipeline that survives the real internet.
Streaming ASR, predictive buffering, and why we gave up on waiting for end-of-speech detection to finish.
Field notes
On voice,
at scale.
Research, benchmarks, and deployment stories from teams running millions of calls through AI voice agents.
What 12 million calls taught us about barge-in.
Humans interrupt conversations 3× more often than most voice AI benchmarks account for. Here's how we rebuilt our turn-taking model — and what we learned about why callers hang up on voice AI that “waits its turn.”
RK
Rohit Kapoor
Head of ML Research
Why after-hours call centers are quietly dying.
A read on the BPO market through 2026. And what operations leaders should ask before renewing their contract.
Persona tuning is now live for all Business plans.
Custom names, tone dials, and vocabulary packs. Ship a Vox that sounds like your brand in under 20 minutes.
Accent coverage, measured honestly.
Most AI voice products claim '40+ languages.' We audited what that actually means at intent accuracy below 95%.
On disclosure: when should Vox say it's Vox?
Regulatory landscape, customer experience data, and our internal guidance for when the AI should out itself.
Dental is the unlikely frontier for voice AI.
High-volume scheduling, stable intents, and frustrated front desks. Why dentistry is Vox's biggest category.
Handling 4,000 concurrent calls without a provisioning bottleneck.
How we moved to per-tenant warm pools and cut cold-start from 1.8s to 90ms.
New: native Salesforce sync.
Bi-directional, field-level mapping, and audit trails by default. Live for all Business and Scale customers.
Does voice AI pretend to listen?
We A/B tested backchanneling — the 'mm-hmm' and 'right' sounds — and found something we didn't expect.