# AI voice agent vendors — Voice Agent Weekly

A neutral directory grouped by category. Listing is editorial and unpaid; it is not a ranking.

## Developer platforms

APIs and SDKs for building custom phone and voice agents.

- [Vapi](https://www.voiceagentweekly.com/vendors/vapi) (vapi.ai) — Developer platform for building voice AI agents.
- [Retell AI](https://www.voiceagentweekly.com/vendors/retell-ai) (retellai.com) — Platform for building and deploying conversational voice agents.
- [Bland AI](https://www.voiceagentweekly.com/vendors/bland-ai) (bland.ai) — Programmable AI phone-call agents for enterprises.

## No-code builders

Visual builders for launching voice agents without engineering.

- [Synthflow](https://www.voiceagentweekly.com/vendors/synthflow) (synthflow.ai) — No-code AI voice agents for phone calls.
- [Thoughtly](https://www.voiceagentweekly.com/vendors/thoughtly) (thoughtly.com) — AI voice agents for inbound and outbound calls.

## Enterprise customer service

Voice AI for large contact centers and customer-service operations.

- [PolyAI](https://www.voiceagentweekly.com/vendors/polyai) (poly.ai) — Enterprise voice assistants for customer service.
- [Parloa](https://www.voiceagentweekly.com/vendors/parloa) (parloa.com) — AI agents for enterprise customer-service calls.
- [Cognigy](https://www.voiceagentweekly.com/vendors/cognigy) (cognigy.com) — Enterprise conversational AI for contact centers.
- [Sierra](https://www.voiceagentweekly.com/vendors/sierra) (sierra.ai) — Conversational AI agents for customer experience.
- [Kore.ai](https://www.voiceagentweekly.com/vendors/kore-ai) (kore.ai) — Enterprise conversational and agentic AI platform.

## Sales & GTM voice agents

Voice agents for inbound qualification, speed-to-lead and outbound sales calls.

- [11x](https://www.voiceagentweekly.com/vendors/11x) (11x.ai) — AI SDR (Alice) and AI phone agent (Julian) for sales teams.

## Voice infrastructure

Speech, realtime-media and open-source building blocks behind voice agents.

- [ElevenLabs](https://www.voiceagentweekly.com/vendors/elevenlabs) (elevenlabs.io) — Voice AI platform with speech models and conversational agents.
- [Deepgram](https://www.voiceagentweekly.com/vendors/deepgram) (deepgram.com) — Speech-to-text, text-to-speech and voice agent APIs.
- [LiveKit](https://www.voiceagentweekly.com/vendors/livekit) (livekit.io) — Open-source realtime media platform with an agents framework.
- [Pipecat](https://www.voiceagentweekly.com/vendors/pipecat) (pipecat.ai) — Open-source framework for voice and multimodal agents.
- [Hume AI](https://www.voiceagentweekly.com/vendors/hume-ai) (hume.ai) — Expressive voice AI models and an empathic voice interface.

## AI receptionists

Answering and booking agents for small businesses.

- [Goodcall](https://www.voiceagentweekly.com/vendors/goodcall) (goodcall.com) — AI phone agent for small and local businesses.


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*Markdown rendering for AI readers and agents of https://www.voiceagentweekly.com/vendors — Voice Agent Weekly (https://www.voiceagentweekly.com/). Researched from public sources and fact-checked against them; sources are linked inline. Corrections: hello@voiceagentweekly.com.*