PROGRAMMABLE VOICE API

Build scalable, programmable voice communications

The Sinch Programmable Voice API helps businesses automate, personalize, and scale global voice calls for your apps, websites, and workflows with enterprise reliability and developer-friendly tools.

Talk to an expert
Image for Build scalable, programmable voice communications
Join over 150,000 businesses, including 8 of the 10 largest tech companies in the world

EASIER CALLS

Automate, personalize, and scale every voice interaction

Make your everyday communication tasks easy with programmable voice workflows and get human-like voices and enterprise-grade reliability through a single Voice API.

Increased efficiency

Automate routine calls, reminders, and updates so your team can focus on strategic work while programmable voice workflows run on their own.

Better experiences

Guide callers through IVR menus using keypad or voice, then respond naturally with text-to-speech in 115+ languages.

Global reliability

Count on a Tier-1 network with over 99.95% SLA and phone numbers in over 70 countries to reach customers worldwide.
Image for Automate, personalize, and scale voice interactions

EASIER CALLS

Automate, personalize, and scale voice interactions

Programmable voice combines Voice API and in-app calling, so you can create custom call flows with IVR menus, natural-sounding text-to-speech, and SDKs for different platforms, all through a single API.

  • Free up teams with automated reminders, updates, and simple calls

  • Direct callers quickly with voice or keypad menus

  • Keep operations running smoothly with >99.95% reliability

Image for Put complete control in developers’ hands

FLEXIBLE FEATURES

Put complete control in developers’ hands

Build the voice functionality your business needs, from privacy protections to advanced analytics, using a versatile API and SDKs.

  • Safeguard personal data with number masking and smart call screening

  • Capture and transcribe conversations securely for insights and compliance

  • Host group calls without extra hardware or telecom contracts

Image for Grow globally on an enterprise-grade, always-on network

SCALABILITY & RELIABILITY

Grow globally on an enterprise-grade, always-on network

Take your business from local projects to global campaigns on infrastructure designed for billions of interactions. The platform spans five AWS regions, offers phone numbers in 70+ countries, and guarantees over 99.95% availability for important calls.

  • Phone numbers in over 70 countries

  • 99.95% availability with SLA

  • ISO 27001, GDPR, and STIR/SHAKEN compliance

  • Access phone numbers in 70+ countries through one provider

WAYS TO USE IT

Control every call with developer-friendly APIs

Number masking

Keep customer information private by using temporary proxy numbers for calls.
Learn more

Outbound alerts

Use text-to-speech when you call customers to keep them in the loop.
Learn more

Interactive Voice Response (IVR)

Build sophisticated phone menus to automatically get customers to the right place.
Learn more

Call recording

Securely record calls via BYO storage and transcribe them for analytics and compliance.
Learn more

Call transcription

Turn voice calls into text—perfect for analysis and compliance.
Learn more

Conference calling

Host multi-participant calls without the hassle of additional gear or carriers.
Learn more

Call screening

Block spam, bring VIPs to the front, and automate call flows with over 99.95% availability across multiple AWS regions.
Learn more

Call analytics

Track and optimize calls with real-time metrics and detailed reports, all in one dashboard.
Learn more

TOOLS FOR EVERY BUSINESS

Voice solutions for every step of the customer journey

Customer support & helpdesks

Create modern support centers with smart routing, self-service IVRs, and number masking to cut down on wait times and keep calls private.

Notifications & alerts

Reach customers at the perfect time to keep them in the loop about fraud warnings, delivery updates, or appointment reminders.

In-app communications

Let users make and receive calls with SDKs for in-app and WebRTC for web, delivering branded experiences.

Protect customer privacy

Use proxy numbers so buyers and sellers or riders and drivers can connect without sharing personal phone numbers.

Frequently asked questions

Programmable voice refers to the ability to automate and control voice calls using APIs. Sinch’s Programmable Voice API allows businesses to embed voice functionality into their apps, websites, and workflows.

Pricing is pay-as-you-go, with per-minute charges for inbound and outbound calls. Additional fees apply for number rental and advanced features like recording, transcription, and IVR.

You need a Sinch account, API keys, a webhook-capable server, and at least one Sinch phone number. Developers familiar with REST APIs or SDKs can set it up quickly by using the Sinch dashboard.

Sinch is ISO 27001 certified, GDPR compliant, and supports STIR/SHAKEN in the US, helping businesses stay compliant at the regional and industry level.

Yes. Whether you’re just starting out or running worldwide operations, our flexible, usage-based model gives you the scalability and reliability you need.

Talk to an expert about programmable voice

Learn how to automate, personalize, and scale voice calls with Sinch’s developer-friendly API and SDKs.