Telnyx

Founded by David Casem in 2009

Build and deploy AI voice agents on carrier-owned infrastructure globally

Pricing model

Free Tier

Rating

★ People love it

Time to value

Quick Setup (< 1 hour)

You can use Telnyx to build AI-powered voice agents that run on infrastructure Telnyx owns end-to-end: private fiber network, edge compute, and GPUs. It combines SIP trunking, programmable voice, SMS, speech-to-text, text-to-speech, and LLM inference under one API and one bill. You can handle inbound and outbound calls in 100+ languages, route calls through 130+ countries, and deploy agents with under 500ms latency. It also includes messaging, number management, IoT SIMs, deepfake detection, and branded calling.

What Telnyx does

Create a voice AI assistant using the /v2/ai/assistants API endpointConfigure inbound call routing with real-time speech transcription and LLM responseSend SMS and MMS messages programmatically via REST APISet up SIP trunking to connect existing PBX systems to the Telnyx networkDeploy an edge function that runs co-located with the media plane for low-latency processingPin agent data to a specific geographic region using the data_boundary config parameterPort phone numbers from another carrier and manage them via dashboard or APIRun standalone LLM inference on Telnyx-owned GPUs using an OpenAI-compatible endpointCarrier-owned private network with edge PoPs in 9 regions means no public internet hops for voice AI callsSingle API covers voice, SMS, AI inference, SIP trunking, and IoT SIMsVoice AI agents with under 500ms round-trip latency using co-located STT, LLM, and TTS on same GPU racksDeepfake detection and STIR/SHAKEN attestation built into the carrier layerStatefulActor runtime keeps agent memory and state alive across restarts and redeploysUsage-based pricing with no per-vendor margins: voice AI all-in at $0.05/minData residency controls let you pin media, transcripts, and inference to specific geographic regionsInbound calling reaches 130+ countries and territories on owned carrier licenses