Demo call on your phone
Enter your PSTN number in E.164 format and receive a short realtime AI demo call.
Enter your PSTN number in E.164 format and receive a short realtime AI demo call.
Overview
LLM-native, voice-first platform built for realtime production calls.
Other solution
Mostly keypad routing with rigid tree logic.
Other solution
Separate STT, LLM, TTS and telephony contracts.
Our solution
Single API and single meter for production-grade calls.
Live voice calls
Proprietary voice orchestration delivers human-quality, low-latency phone conversations at scale, with speech, reasoning, and audio tuned together so every turn feels responsive and natural on real production calls.
Realtime orchestration keeps turn response fast so calls stay fluent and interruptions feel natural.
Voice output is tuned for natural cadence and clarity, making agents sound less robotic on production calls.
Conversation timing adapts in-call so agents know when to listen, pause, and respond without clipping users.

Five launch styles for realtime agents, with more on the way. Select a card to highlight its waveform, or tap play to animate a short preview bar.
Lead qualification
Medical triage
Support follow-up
Outbound promos
Guided onboarding
More
Coming soon
Regional packs • Custom timbres • Fine-tuned styles
Highlights
Handle everything from routine requests to complex edge cases without trade-offs. Launch in weeks, not months.
Design reliable conversational call flows with built-in guardrails and full control over agent behavior.
Add built-in or custom functions into call flows so agents can book appointments, update records, and transfer calls in real time.
Deliver accurate answers with a knowledge layer that stays synchronized with your latest product and website content.
Platform Features
Run inbound, outbound, and batch campaigns with scheduling, transfers, AI extraction, and booking logic in one platform.
Answer instantly and transfer to the right team using caller intent, sentiment, or explicit requests.
Launch follow-ups or reminders with time-zone-aware call scheduling for higher connection rates.
Trigger large call batches via API, extract structured info, and sync bookings into your integrations.
Add one URL, docs, or PDFs and power agents with live, retrieval-augmented answers grounded in your content.
Build visual flows with branching paths, reusable logic, and function calls for consistent handling across scenarios.
Start fast with a single prompt agent or orchestrate complex journeys using multi prompt agent setups.
Integrations
Build custom workflows with our open REST API and webhooks. Plug voice agents into telephony, CRM, scheduling, and analytics without stitching vendors by hand.
FAQ
Revolutionize your call operation with Karasu. Start building out-of-the-box conversational agents in minutes.