Blog
Field notes from building voice AI in public.
Engineering posts, product updates, and the occasional opinionated take on where voice AI is headed.
- AnnouncementApr 28, 2026 · 2 min
Introducing Tone: the open-source voice AI platform.
Why we're building Tone in public, the gaps in the closed-source incumbents, and what shipping looks like from here.
Karthik Ramesh
- EngineeringApr 22, 2026 · 2 min
Agentic RAG for voice: the latency budget you didn't know you had.
How we shaved 400ms off knowledge-base lookups by making retrieval a tool the agent calls — not a wrapper around it.
Lavish Gulati
- ProductApr 15, 2026 · 2 min
Beyond English: testing voice agents across 30+ accents.
Your customers don't all sound the same. The persona library that ships with Tone's test center, and how to add your own.
Adarsh Raj
- EngineeringApr 8, 2026 · 2 min
Webhooks vs. tools: when to give your voice agent a hand.
A practical taxonomy for when an action belongs to your backend, the agent's tool registry, or somewhere in between.
Rishabh Sanjay