SMS / Voice
11 providers in this category.
SMS and voice (CPaaS) providers send and receive text messages and phone calls programmatically, often across channels like WhatsApp and with short-code support. They power notifications, one-time-passcode verification, and voice workflows. Pricing is usage-based per message or minute; compare channel coverage (SMS, voice, WhatsApp), short codes, and how API-first the platform is.
Companies
Neutral ordering. Not a recommendation.
46elks
46elks.com
46elks is a Swedish telecom-infrastructure API for developers, providing SMS, voice calls, and virtual phone numbers across dozens of countries with simple pay-as-you-go pricing.
Amazon SNS
aws.amazon.com/sns
Amazon SNS (Simple Notification Service) is AWS's pub/sub messaging service for sending application and event notifications, including SMS.
Bandwidth
www.bandwidth.com
Bandwidth is a CPaaS provider operating its own Tier-1 all-IP voice network, offering programmable voice, SMS, MMS, and RCS messaging, short codes, toll-free, 10DLC, and emergency-services APIs.
Bird
bird.com
Bird, formerly MessageBird, is an omnichannel communications platform covering SMS, voice, email, and chat, combining CPaaS capabilities with CRM features.
Infobip
www.infobip.com
Infobip is one of the largest communications platforms globally, operating its own carrier-grade network for SMS, voice, WhatsApp, RCS, and email from Croatia across more than 190 countries.
Plivo
www.plivo.com
Plivo is a cloud communications platform offering SMS and voice APIs, known for competitive per-unit pricing in the budget tier.
Sinch
www.sinch.com
Sinch is a communications platform offering SMS, voice, email, and messaging APIs at global scale. It targets enterprises building customer communications across high volumes.
Telesign
www.telesign.com
Telesign, a Proximus Global company, provides programmable SMS, voice, and multi-channel verification APIs alongside digital identity and fraud-prevention intelligence.
Telnyx
telnyx.com
Telnyx is a communications platform that delivers SMS, voice, and networking APIs over its own global private IP and voice network, which often lowers costs.
Twilio
www.twilio.com
Twilio is a communications platform providing programmable APIs for SMS, voice, video, and messaging, widely regarded as a reference CPaaS.
