# The Best AI Voice Agents (2026)

> Source: https://theagentsindex.com/best-ai-voice-agents (curated, quality-gated, re-verified)

AI voice-agent products are not interchangeable. The first three entries are the underlying building blocks: OpenAI Realtime API is the raw model, Deepgram Voice Agent API is speech infrastructure with managed, VPC-hosted and self-hosted deployment, and Cartesia combines its Sonic and Ink models with an Apache 2.0 Line SDK. They suit teams that want to assemble the system themselves. Vapi, Retell AI and Bland AI are the next tier of developer-facing platforms: Vapi maximizes provider control, Retell emphasizes turn-taking and voice quality, and Bland AI publishes the clearest all-in hosted rate.

The bill is a second ordering principle because “per minute” does not mean the same thing across this set. OpenAI is token-metered and Deepgram is connection-time metered, with additional options depending on the components supplied. Cartesia separates agent minutes from monthly speech-model credits and telephony. Vapi and Retell separate orchestration from model, voice and telephony costs; ElevenLabs uses a subscription minute pool plus overage and can bill an external LLM and telephony separately. Synthflow AI currently has no public pricing anchor, while LiveKit Agents is free up to 1,000 agent-session minutes but still leaves inference and provider spending outside that allowance. PolyAI remains sales-led with no public rate card, and SkipCalls is a flat subscription whose own site and App Store listings currently show different prices. Bland AI is the clearest published all-in entry rate, although its higher tiers add platform fees.

The useful choice is therefore fit, not one universal winner. Start with OpenAI for lowest-level model control, Deepgram for speech infrastructure and deployment flexibility, or Cartesia for an open SDK. Choose Vapi or Retell for a custom build, Bland for a predictable hosted bill, ElevenLabs for voice quality and variety, Synthflow for a no-code ops path, LiveKit for self-hosting, PolyAI for established enterprise deployments, or SkipCalls when a finished receptionist is more useful than infrastructure. The list is intentionally ordered from the rawest building block to the most packaged product; it is not claiming that a model, an API, a no-code platform and a receptionist are direct substitutes. Every entry is a Published listing, and the notes below use the current pricing and capability anchors rather than treating a headline rate as a complete bill.

| # | Name | What it is | Pricing | API |
| --- | --- | --- | --- | --- |
| 1 | [OpenAI Realtime API](https://theagentsindex.com/openai-realtime-api.md) | OpenAI's speech-to-speech API for low-latency voice agents over WebRTC, WebSocket or SIP. | From $10/1m audio input tokens | Yes |
| 2 | [Deepgram Voice Agent API](https://theagentsindex.com/deepgram-voice-agent-api.md) | One WebSocket API that runs speech-to-text, LLM orchestration and text-to-speech for real-time voice agents. | From $0.05/minute | Yes |
| 3 | [Cartesia](https://theagentsindex.com/cartesia.md) | Real-time speech models and a managed runtime for production phone and web voice agents. | Free, then $5/month | Yes |
| 4 | [Vapi](https://theagentsindex.com/vapi.md) | Developer platform for building, testing and deploying voice AI agents that make and receive phone calls. | From $0.05/minute | Yes |
| 5 | [Retell AI](https://theagentsindex.com/retell-ai.md) | Pay-as-you-go platform for building, testing and running AI phone, chat and SMS agents. | From $0.07/minute | Yes |
| 6 | [Bland](https://theagentsindex.com/bland-ai.md) | Enterprise voice AI platform for inbound and outbound phone agents, running on Bland's own self-hosted models. | Free, then $0.14/minute | Yes |
| 7 | [ElevenLabs Agents](https://theagentsindex.com/elevenlabs-conversational-ai.md) | Hosted platform for building voice and chat agents, with telephony, SDKs and a choice of LLM. | Free, then $6/month | Yes |
| 8 | [Synthflow](https://theagentsindex.com/synthflow-ai.md) | Enterprise voice AI platform with in-house telephony for inbound and outbound call automation. | Free, then $30,000/year | Yes |
| 9 | [LiveKit Agents](https://theagentsindex.com/livekit-agents.md) | Open-source Python and Node.js framework for voice AI agents, with LiveKit Cloud hosting, telephony and observability. | Free, then $50/month | Yes |
| 10 | [PolyAI](https://theagentsindex.com/polyai.md) | Enterprise platform for building voice and chat agents that resolve customer calls, priced per minute. | — | Yes |
| 11 | [SkipCalls](https://theagentsindex.com/skipcalls.md) | AI receptionist that answers a small business's existing phone number 24/7. | From $19.99/month | Yes |
| 12 | [Auto-Respond](https://theagentsindex.com/auto-respond.md) | AI answering service and voice agent that answers calls and marketplace texts, qualifies leads and books jobs. | From $10/month | Yes |
| 13 | [VoiceAgents](https://theagentsindex.com/voiceagent.md) | Voice AI platform for phone agents that speak Yoruba, Igbo, Pidgin, Hausa and Nigerian English. | From $15/month | Yes |
| 14 | [AudioCodes Live Hub](https://theagentsindex.com/audiocodes-live-hub.md) | Self-service cloud platform for building voice AI agents and connecting them to real telephony channels. | From $0.05/minute | Yes |
| 15 | [OmniDimension](https://theagentsindex.com/omnidimension.md) | No-code platform for building voice AI agents and running them on phone, web chat, WhatsApp, email and SMS. | From $15/month | Yes |
| 16 | [Ringly](https://theagentsindex.com/ringly.md) | AI phone agent that answers Shopify brands' inbound customer calls and escalates what it cannot resolve. | From $349/month | No |
| 17 | [Telnyx Voice AI Agents](https://theagentsindex.com/telnyx-voice-ai.md) | Carrier-owned platform for phone and web voice agents, with telephony, STT, TTS, LLM and orchestration in one stack. | From $0.05/minute | Yes |
| 18 | [Leaping AI](https://theagentsindex.com/leaping-ai.md) | Voice and SMS AI agents for call centres, with built-in telephony, CRM integrations and a no-code agent builder. | From $1,000/month | Yes |
| 19 | [HeyRik](https://theagentsindex.com/heyrik.md) | Build, clone and deploy AI phone agents that answer inbound calls and run outbound calling campaigns. | From ₹999/month | Yes |
| 20 | [TelEcho](https://theagentsindex.com/telecho.md) | Conversational AI platform for voice and messaging agents that run customer calls and update connected systems. | From $0.07/minute | Yes |
| 21 | [VeraDial](https://theagentsindex.com/veradial.md) | AI receptionist and verified US/Canadian business line that answers calls and texts and places outbound calls. | From $14.99/month | Yes |
| 22 | [Kalyvox](https://theagentsindex.com/kalyvox.md) | AI phone receptionist that answers inbound calls, qualifies them, transfers or books appointments. | From $95/month | Yes |
| 23 | [VoiceFleet](https://theagentsindex.com/voicefleet.md) | Inbound AI phone receptionist for small businesses: answers calls, captures bookings, escalates urgent callers. | From €99/month | Yes |

## Methodology

Ranked by the buying job each product serves, from the raw speech model to the finished receptionist—not by a single universal quality score. The first group covers model and speech infrastructure, followed by developer platforms, an all-in hosted option, a voice specialist, a no-code path, an open-source framework, an enterprise incumbent and a packaged receptionist. Within the page’s progression, a position reflects the combination of capability transparency, deployment control, published cost and audience fit; a lower headline price never wins when mandatory components are omitted, and no-code or enterprise suitability can justify a lower position. Every entry is a Published listing with a distinct voice-agent role; general agent builders that merely expose a voice channel are not treated as equivalent products. Reordering follows the current pricing and deployment facts in each listing, while every note calls out a meaningful limitation rather than treating a feature list as a verdict.