Turn code into conversations with
an API that talks
Your voice agent is only as real-time as the network under it. Bandwidth owns and operates its network (Tier 1 in the US) with global reach, so your AI conversations run on a direct voice path with fewer hops and less that can break. Our Voice API works natively with OpenAI Realtime API.
You bring the AI expertise.
We’ll bring the telco.
Your Voice AI platform deserves a network built for it. The Bandwidth network is reliable, carrier-grade, and built for real-time.
Built for the builders
SDKs in 6 languages
Node.js, Python, Ruby, PHP, .NET, Java
Voice Adapter for Twilio
Swap endpoints without rewriting your application logic.
Pre-flight checker
Score the complexity of the call flows on BXML before you migrate calls.
Free sandbox credits
Test via Bandwidth Build before you commit.
HTTPS-based call control
No SIP infrastructure required to start.
Estimate your use case
A cleaner voice path for real-time AI
Your agent sounds great during testing. Then your traffic goes live on the public internet, and the conversation becomes stilted.
We solve this by keeping your traffic on our owned carrier network, so you have a direct path with fewer hops, and no-middleman pricing.
Our customers’ top AI use cases
Routing routine inquiries
When needed, your call makes a smooth agent-to-human transfer with User-to-User data for context.
Building agentic AI
Build smart AI agents for sophisticated conversations and problem-solving.
Ready for your vertical
From restaurant ordering to dental appointments, our telecom foundation serves any vertical.
Starting the conversation
Go beyond the basic outbound voice notification and have real conversations.
Creating AI-ready Voice conversations across verticals
Healthcare
Appointment confirmations become conversational and create better patient experiences when AI is involved. Bandwidth offers a Business Associate Addendum (BAA) to support messaging and voice API channels.
Hospitality & Travel
From updating hotel reservations, to sharing flight updates, the hospitality and travel space is ripe for AI Voice innovation.
Finance
Finance and fintech companies deal with a huge volume of calls. Resolve customer inquiries with efficient AI thanks to our low-latency voice network.
Why Bookline chose Bandwidth to power its Voice AI
Bookline powers hospitality with fast, reliable AI that automates bookings, frees staff, and delivers standout guest experiences.
But it wasn’t until the AI market grew more competitive that its true differentiation shone through: fast, reliable onboarding and a commitment to delivering lasting value beyond technology. In fact, with Bandwidth, they cut onboarding time by 15%! Check out their full story.
Get the most out of your programmable voice
Start for free today
Get your free Bandwidth Build credits and start making calls today. When you’re ready to scale, request a full Voice API trial.
FAQs about Voice for AI platforms
With the Twilio Voice Adapter, it’s not longer a rewrite. Your application logic stays put, just repoint your endpoints to Bandwidth and keep building. Our Voice Adapter for Twilio makes the initial jump even easier.
Yes. SIP URI Ingress routes inbound calls to a SIP address instead of a phone number, and SIP REFER lets you transfer mid-call and release the leg immediately. Together they let your AI agent hand off a call and exit cleanly.
Free Build credits so you can start making calls right away. You get HTTPS-based call control with SDKs in six languages, media streaming, WebRTC, Text-to-Speech, transcription, and more — no SIP infrastructure required. When you’re ready to scale, request a full Voice API trial.
As a licensed US carrier, Bandwidth is FCC-registered as having Complete STIR/SHAKEN Implementation and is built to support your compliance requirements — including HIPAA, GDPR, and CPNI obligations. WebRTC connections are DTLS/SRTP encrypted by default.
Yes. Bi-directional media streaming forks live audio over WebSocket to any AI tool — your own model, OpenAI, Deepgram, LiveKit, or others. Because it’s real-time, there’s no record-then-process delay, which is what conversational AI needs to feel real-time.
Billing model: Bandwidth bills in 6-second increments. On AI calls that average 30–90 seconds, that difference compounds fast at scale.
Carrier vs. aggregator: Bandwidth owns and operates its US carrier network. That’s fewer hops, lower latency, less that can break in production.
The migration itself: It’s an endpoint swap, not a rewrite. The Voice Adapter for Twilio maps Bandwidth’s API to Twilio’s syntax so you can start off without changing your codebase.
Bandwidth’s WebSocket media streaming lets you pass raw audio directly between Bandwidth and the AI platform of your choice in real time. If your stack is SIP-based, that works too. Platforms like ElevenLabs have documented SIP trunk integrations with Bandwidth out of the box.
Yes. Add business messaging to your Bandwidth account and build voice AI call flows with SMS fallback into a single application without managing multiple providers.
Direct PSTN access, private routing between points of presence, no public internet between hops. Fewer handoffs, less turbulence makes for a network that takes up so little of your mouth-to-ear latency, you’ll forget we’re there.
Bandwidth bills in 6-second increments. Many competitors bill in 60-second blocks. On AI calls that run 20–90 seconds, the difference compounds at scale. Use the pricing calculator to estimate your use case.
Yes. Bandwidth works with telecom resellers, platform builders, and enterprises deploying voice at wholesale volumes. Talk to our team about high-volume pricing and carrier interconnect options.
