Voice that thinks.
At the speed of a heartbeat.
Sub-second latency. 46 languages. Function calling, RAG, and real-time speech detection — the substrate every Finn agent runs on.
Core capabilities
Five primitives.
Every conversation built on top.
The model layer is a commodity. The infrastructure around it isn't — and that's where Finn earns the call.
Sub-second voice loop
Streaming ASR + LLM + TTS in a single hot pipeline. No turn-by-turn lag. Customers hear a human cadence, not a robot.
Function calling, in-call
Pull from your CRM, fire webhooks, run business logic mid-conversation. The agent never says 'one moment please.'
Multilingual by default
Switch language mid-call. Hindi to English to Tamil — same agent, same voice persona, same context.
Knowledge base + RAG
Upload PDFs, sitemaps, FAQs. Finn grounds every answer in your data. No hallucinated SLAs.
Voice library
100+ voices across accents and languages. Clone your own brand voice in under a minute.
Real-time speech detection
Interrupt handling, silence detection, voicemail discrimination — built in, not bolted on.
the voice loop
Streaming ASR, LLM, and TTS in a single hot pipe.
Most stacks chain providers in series and pay the latency tax at every hop. Finn runs streaming speech-to-text, model inference, and text-to-speech in one fused pipeline — sub-400ms end-to-end. Customers hear a real cadence, not a stop-and-wait.
- Streaming ASR via Deepgram, AssemblyAI, or first-party
- GPT-4o, Claude, Gemini, or self-hosted Llama under the hood
- ElevenLabs, PlayHT, Cartesia, and 100+ voices ready
- Interrupt handling + voicemail detection out-of-the-box
knowledge, in-call
Grounded answers. No hallucinated SLAs.
Upload PDFs, sitemaps, FAQs, internal docs. Finn embeds, chunks, and retrieves the right passage every turn. Source citations attach to every answer for human review.
- PDFs, URLs, Notion, Confluence — same import flow
- Per-Finn knowledge bases, isolated per workspace
- Auto re-index on doc change, no manual rebuilds
- Source-link attribution surfaced in PCA
voices and languages
46 languages. 100+ voices. Switch mid-call.
Multilingual is not a feature — it's the default. Pick a voice, pick a language, ship to any region. Clone your own brand voice in under a minute.
- Hindi, Tamil, Spanish, Portuguese, Arabic — and 40+ more
- Brand voice cloning from a 60-second sample
- Language switching mid-conversation, same persona
- Voice preview library, accent-tagged and gender-balanced
Under the hood
Built for the real world.
Not the demo.
Every component above is benchmarked on production traffic — 50M+ minutes shipped, 250+ peak concurrent calls, customers on five continents.
Audited + compliant
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