How Tigy AI Works

Tigy AI is a platform for building and running voice AI agents. You define a conversation flow, connect a phone number, and Tigy AI handles the rest — transcribing the caller's speech (STT), generating intelligent responses (LLM), speaking them back in a natural voice (TTS), and returning structured results when the call ends.

The core loop

sequenceDiagram
    participant U as Dashboard / Your App
    participant API as Tigy AI API
    participant STT as Transcriber (STT)
    participant LLM as LLM Provider
    participant TTS as Voice Synthesizer (TTS)
    participant Tel as Telephony Provider
    participant Cal as Caller / Contact

    U->>API: Start a conversation
    Tel->>Cal: Caller connects
    Tel-->>API: Raw audio stream
    loop Conversation
        API->>STT: Caller audio
        STT-->>API: Transcribed text
        API->>LLM: Transcript + agent prompt + context
        LLM-->>API: Agent response text
        API->>TTS: Response text
        TTS-->>API: Synthesized audio
        API->>Tel: Audio stream
        Tel->>Cal: Agent speaks
    end
    API->>API: Extract context, run webhooks
    API-->>U: Run record (transcript, recording, gathered data)

Key components

Runs Every execution of a agent creates a run. The run record holds the transcript, recording, extracted data, and cost information.

Telephony The phone infrastructure. Tigy AI connects to your telephony provider to receive calls and stream audio between the caller and your agent in real time.

Transcriber (STT) Converts the caller's speech to text in real time. Tigy AI sends the audio stream to your configured speech-to-text provider and uses the transcript to drive both the LLM and the final run record.

LLM Provider Processes the transcript and the agent's prompt to generate the agent's next response. It follows the agent instructions and can call the configured tools.

Voice Synthesizer (TTS) Converts the LLM's text response to audio and streams it back to the caller. The choice of TTS provider and voice is configurable per agent.

How it fits together

When you trigger a call:

1. Tigy AI instructs your telephony provider to dial the number
2. When the caller answers, a real-time audio pipeline opens
3. The caller's speech is transcribed by the STT provider
4. The transcript is sent to the LLM with the agent's prompt and conversation history
5. The LLM responds — the response is synthesized to audio by the TTS provider and streamed to the caller
6. The conversation continues according to the agent instructions until the caller hangs up, the end-call tool is invoked or a configured limit is reached
7. Post-call: context is extracted, webhooks fire, the run record is saved

Next steps

Calls & Runs

The lifecycle of a call