A richer voice experience.
Speech Synthesis Markup Language (SSML)Programmatically control the pronunciation of text, including punctuation, pausing, emphasis, volume, pitch, rate of speech, phonetic pronunciation and context disambiguation. Learn more
More languagesExtensive coverage to reach over 4.5 billion people with 40 supported languages including: English, Mandarin, Arabic, Spanish, Hindi and more. Learn more
Voice Quality engineDeliver high quality voice experiences using our reliable global carrier network. Learn more
"We look forward to continuing to push the boundaries of what's possible in customer communications with [Vonage APIs]." —Alicia Teo, Customer Experience Manager, ZALORA
Engage a large audience efficiently and cost effectively.
Reach customers with marketing or other broadcast messages with outbound phone calls and optional IVR feedback.
Let your callers choose.
Add a simple Interactive Voice Response (IVR) script to your existing applications.
Grow your business with viral adoption
Enable worldwide delivery and receipt of critical alerts via phone calls.
Give your call center agents an audible heads-up
Use a call whisper to tell your call center agent which campaign the call concerns before they greet the caller.
Easily add a layer of security
Verify users by reaching their mobile device with SMS or voice codes.
Convenience without compromising security
Replace static passwords with single use codes sent over SMS, voice or push.