Agent Voice Response
Agent Voice Response (AVR) connects an Asterisk PBX to a real-time voice AI agent that callers can interrupt while it is speaking.
What Agent Voice Response is
Agent Voice Response (AVR) connects an Asterisk PBX to a real-time voice AI agent that callers can interrupt while it is speaking. It supports Asterisk AudioSocket on Asterisk 18 and later, and names FreePBX, VitalPBX, Vicidial, Elastix, and custom dialplans as compatible systems. Its composable microservices let operators swap speech recognition, language model, and text-to-speech engines. Listed providers include OpenAI, Anthropic, Deepgram, ElevenLabs, Google, and several local options. AVR can run locally with Vosk or Silero for recognition, Ollama for reasoning, and CoquiTTS or Kokoro for speech synthesis; the maker says this keeps caller audio on the network. Audio processing includes noise cancellation and echo suppression before audio reaches the model. Docker microservices can be scaled horizontally behind a load balancer. AVR is free for personal and commercial use, with no license keys or per-minute charge. Setup involves Docker images, provider configuration, and an Asterisk dialplan extension. Call recording is not supported.
Good
- Free for personal and commercial use.
- No license keys or per-minute charge.
- Supports caller interruptions during agent speech.
- Can run locally with listed speech and AI engines.
- Stateless services can scale horizontally.
Watch out
- Requires self-hosted deployment.
- Setup calls for Docker and dialplan configuration.
- Call recording is not supported.
Who it suits
AVR suits teams running Asterisk that want to add interruptible voice AI, including for customer support or contact-center automation. Its local deployment option may suit operators who want caller audio to stay on their network.
Verdict
AVR offers a free, self-hosted route to voice AI for Asterisk installations, with local processing options and replaceable engines. Factor in the Docker and dialplan setup, and note that call recording is unavailable.
Plans and prices
From Agent Voice Response's own pricing page, checked 2 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Free | Free | Free for personal and commercial use · no license keys · no per-minute tax |
The facts
Each one read from Agent Voice Response's own pages, with the date it was checked.
What it does
- AI integrations
- Named providers include OpenAI, Anthropic, Deepgram, ElevenLabs, Google, Ollama, Vosk, Kokoro, Ultravox, OpenRouter, CoquiTTS, and Silero.checked 2 Oct 2026
- Architecture
- It uses composable microservices with hot-swappable ASR, LLM, and TTS engines.checked 2 Oct 2026
- Audio processing
- The product describes AI-powered noise cancellation and echo suppression before audio reaches the model.checked 2 Oct 2026
- Deployment and privacy
- AVR can run fully locally with Vosk or Silero for recognition, Ollama for reasoning, and CoquiTTS or Kokoro for speech synthesis; the maker says caller audio then stays on the network.checked 2 Oct 2026
- Product
- Agent Voice Response turns an Asterisk PBX into a real-time, interruptible voice AI agent.checked 2 Oct 2026
- Scaling
- The maker describes stateless Docker microservices that can be scaled horizontally behind a load balancer.checked 2 Oct 2026
- Setup requirement
- The getting-started instructions call for Docker images, provider configuration, and adding an extension to the Asterisk dialplan.checked 2 Oct 2026
- Speech interaction
- Voice activity detection supports caller interruptions while the agent is speaking.checked 2 Oct 2026
- Support
- The maker points users to documentation, Discord, GitHub, and an email address for business inquiries and partnerships.checked 2 Oct 2026
- Telephony
- It supports Asterisk AudioSocket on Asterisk 18+ and names FreePBX, VitalPBX, Vicidial, Elastix, and custom dialplans as compatible systems.checked 2 Oct 2026
- Use cases
- The maker highlights customer support, contact-center automation, healthcare assistants, voice commerce, voice learning, and IoT voice control.checked 2 Oct 2026
Money
- Cost
- AVR is free for personal and commercial use, with no license keys or per-minute charge; donations are voluntary.checked 2 Oct 2026
Alternatives to Agent Voice Response
- 1
Voicent
Free planAndroidiOSWebAPI8.2From $163 a month - 2
CallFire IVR
Free planAndroidiOSWebAPI8.0From $99 a month - 3
Knowlarity Cloud Contact Center
AndroidiOSWebAPI7.8From ₹16,800 a year - 4
MyOperator
AndroidiOSWebAPI7.8From ₹5,000 a month - 5
Momo Business IVR
Free planWebLinuxmacOSWindows7.4From 25,000 TZS a month - 6
KloudTalk
AndroidiOSWebmacOS7.3From $240 a year