Providers
Providers are the services behind every live voice agent. They work together in real time to hear the caller, reason about the next response, speak naturally, and connect through the phone network.
Why provider choice matters
Provider configuration should be tested with your actual prompt, tools, knowledge base, telephony route, and caller scenarios. Voice quality is a system property, not a single setting.
How providers work together
- Speech-to-text converts caller audio into text.
- LLM understands intent, plans the next response, and decides when to use tools.
- Tools and knowledge provide business context or trigger real actions.
- Text-to-speech turns the response into natural audio.
- Telephony carries the call inbound or outbound.
Supported provider categories
LLMs
The reasoning layer of the voice agent. It interprets caller intent, follows the prompt, selects tools, and produces the next response.
Transcribers
Speech-to-text quality directly affects agent behavior. Accuracy, latency, endpointing, and language support all matter for production calls.
Synthesizers
Text-to-speech controls how the agent sounds. Choose voices that match the brand, region, call type, and latency target.
Telephony providers
Telephony providers connect agents to phone numbers, inbound routes, outbound calls, and recordings.