Telnyx: Voice AI on Carrier-Owned Infrastructure

Telnyx: conversational voice AI on a carrier-owned network and GPUs

Telnyx is a communications platform that, unlike most CPaaS providers, owns its infrastructure end to end: a Tier-1 carrier network spanning 40+ countries, phone numbers, SIP trunking, messaging, and — the newer layer — GPU compute deployed at the network edge for AI inference. That vertical stack is the whole pitch for its voice AI product: speech-to-text, LLM inference, and text-to-speech all run on Telnyx hardware on the same network carrying the call, so there are no third-party handoffs adding lag mid-conversation.

The result is voice AI agents with end-to-end latency under 500 milliseconds — the difference between a phone agent that interrupts naturally and one that leaves awkward gaps. Pricing is consumption-based: the bundled voice AI stack costs $0.05 per minute, with SIP trunking from $0.005/min outbound and $0.0035/min inbound, and SMS from $0.004 per message. New accounts start as free trial accounts with no credit card, then top up pay-as-you-go with automatic volume discounts; eligible startups can apply for $10,000 in credits.

Key Features

Voice AI agents bundling speech-to-text, LLM inference, and text-to-speech at $0.05 per minute
Owned Tier-1 carrier network across 40+ countries with sub-500ms end-to-end conversational latency
Edge-deployed, Telnyx-owned GPU infrastructure for voice and text inference workloads
Full telephony layer: numbers, SIP trunking from $0.005/min, and SMS/MMS from $0.004 per message
Mission Control portal plus APIs and SDKs for provisioning, building, and monitoring agents
Pay-as-you-go pricing with automatic volume discounts and around-the-clock in-house support on every account

Ideal Use Case

Telnyx suits engineering teams building phone-based AI agents at production scale — support lines, appointment scheduling, order status, outbound qualification — where per-minute economics and conversational latency decide viability. It also fits teams already buying SIP trunking or messaging who want their AI voice layer on the same network and bill instead of gluing a model provider to a separate carrier.

How Telnyx differentiates

More than 14,000 companies use Telnyx, including OpenAI, Microsoft, IBM, Cisco, Zillow, and the American Red Cross. Most voice AI platforms rent connectivity from carriers and inference from cloud GPU providers; Telnyx owns both, which is how it commits to sub-500ms round trips and a flat $0.05/minute for the full STT-LLM-TTS loop. For builders comparing against Twilio, the difference is infrastructure ownership rather than resold minutes.

FAQ

How much does Telnyx voice AI cost? The bundled stack — speech-to-text, LLM inference, and text-to-speech — is $0.05 per minute, billed pay-as-you-go with volume discounts at scale.

Is there a free trial? Yes. New signups get a trial account with no credit card required to explore the platform before topping up.

Why does owning the network matter for voice AI? Every handoff between a carrier, a cloud, and a model provider adds latency. Telnyx runs the call and the inference on its own infrastructure, keeping end-to-end response under 500ms.

Does Telnyx replace Twilio? For voice, messaging, numbers, and SIP trunking, yes — with the addition of built-in GPU inference for AI agents rather than bring-your-own-model plumbing.

tl;dr

Telnyx runs conversational voice AI on infrastructure it actually owns — a 40+ country Tier-1 carrier network plus edge GPUs — delivering sub-500ms AI phone agents at $0.05/minute, trusted by 14,000+ companies including OpenAI, Microsoft, and IBM.

Looking for more options? Browse the Voice AI directory or read our best AI voice tools listicle. Telnyx is also tracked on Crunchbase.