Best realtime infrastructure for voice AI

Combined ranking

1. 1
   LLiveKit—15 pts

   GPT #1Claude #1Gemini #1

   Best overall blend of open-source WebRTC, managed global cloud, Python and Node.js agent SDKs, strong turn detection, interruption handling, multimodal support, observability, SIP telephony, and broad model-provider choice

   Claude The de facto standard for voice AI infrastructure — open-source WebRTC stack plus LiveKit Cloud, the Agents framework purpose-built for STT-LLM-TTS and speech-to-speech pipelines, SIP telephony bridging, and proven hyperscale credibility from powering ChatGPT's Advanced Voice Mode

   Gemini Industry-standard open-source WebRTC SFU infrastructure with a dedicated Agents framework, offering ultra-low latency, native audio resilience, and self-hosting flexibility

   To stay #1

   per GPT Make production telephony operations and debugging as turnkey as Twilio

   per Claude Simplify the self-hosted-to-cloud operational story and pricing predictability at high agent concurrency so teams don't fear lock-in as usage scales

   per Gemini Simplify the initial setup complexity and deployment overhead for smaller developer teams

2. 2
   DDaily—10 pts

   GPT #2Claude #2Gemini #4

   Battle-tested global WebRTC, excellent audio quality, low-level media control, mature browser and mobile SDKs, and first-class Pipecat integration for highly composable voice-agent pipelines

   Claude Voice-AI-first WebRTC platform with excellent low-latency global mesh, and stewardship of Pipecat — the most popular open-source voice agent orchestration framework — giving the tightest framework-plus-transport integration available

   Gemini High-scale WebRTC infrastructure offering Daily Bots, featuring deep integration with the open-source Pipecat orchestration framework for custom pipelines

   To rank higher

   per GPT Unify Daily and Pipecat into a more cohesive end-to-end production platform

   per Claude Close the raw infrastructure breadth gap with LiveKit (SIP depth, self-hostable core) so Pipecat users have fewer reasons to run it on a competitor's transport

   per Gemini Standardize and simplify their pricing structure to be more predictable for variable real-time usage

3. 3
   AAgora—6 pts

   GPT #3Claude #3Gemini —

   Exceptional global real-time network, strong performance on difficult mobile connections, mature noise suppression, and an increasingly capable Conversational AI Engine with interruption and multimodal controls

   Claude Unmatched global scale and last-mile reliability via its SD-RTN backbone, huge device/SDK matrix, and a Conversational AI Engine that bolts agents onto an already battle-tested RTC network — strong in Asia and on flaky mobile networks

   To rank higher

   per GPT Build an open-source developer ecosystem and agent-framework community comparable to LiveKit

   per Claude Modernize developer experience and pricing transparency to match the open-source-friendly, agent-native ergonomics of LiveKit and Daily

4. 4
   TTwilio—4 pts

   GPT #4Claude #4Gemini —

   Unmatched phone-number, PSTN, SIP, compliance, call-routing, transfer, and enterprise operations stack, with ConversationRelay simplifying streaming STT, TTS, and interruption handling

   Claude Dominant PSTN/telephony reach with ConversationRelay piping phone calls into any LLM stack — the fastest path when your voice agent must answer real phone numbers at enterprise compliance grade

   To rank higher

   per GPT Offer a genuinely open, audio-native agent framework instead of centering the developer path on proprietary text-over-WebSocket abstractions

   per Claude Ship a genuinely WebRTC-native, agent-first media layer instead of leaning on telephony heritage, and address per-minute pricing that punishes high-volume agents

5. 5
   Retell AI—4 pts

   GPT —Claude —Gemini #2

   High-performance managed platform featuring industry-leading turn-taking detection, built-in conversational state handling, and robust telemetry

   To rank higher

   per Gemini Provide a fully self-hostable open-source version of their core orchestration engine to eliminate vendor lock-in

6. 6
   Vapi—3 pts

   GPT —Claude —Gemini #3

   Developer-centric API platform that abstracts complex telephony and WebRTC routing, enabling rapid prototyping and seamless third-party LLM and TTS integration

   To rank higher

   per Gemini Improve native packet loss concealment and audio stream stability over highly congested mobile networks

7. 7
   CCloudflare Realtime—2 pts

   GPT #5Claude #5Gemini —

   WebRTC voice and video SDKs backed by Cloudflare’s enormous edge network, attractive integration with Workers, Durable Objects, and serverless AI infrastructure, and strong long-term architectural potential

   Claude SFU and TURN running on a 300+ city edge network with serverless Workers/Durable Objects orchestration and aggressive bandwidth pricing makes it the most cost-efficient emerging option for latency-sensitive agents

   To rank higher

   per GPT Mature its voice-agent-specific orchestration, telephony, observability, and production tooling

   per Claude Mature the agent tooling ecosystem (orchestration SDKs, STT/TTS integrations, examples) to production parity with LiveKit Agents and Pipecat

8. 8
   TTelnyx—1 pts

   GPT —Claude —Gemini #5

   Telephony-native infrastructure that operates its own private global network, combining direct SIP/PSTN trunking with low-latency edge AI processing

   To rank higher

   per Gemini Expand and modernize their developer documentation and SDK support specifically for non-telephony WebRTC client applications

Just missed the top 5

By model

Tracked by ModelsAgree · rank 1 = 5 pts … rank 5 = 1 pt · re-polled continuously