Twilio

Cloud communications platform as a service that exposes APIs for building voice, video, and messaging applications without owning telecom infrastructure. Developers send SMS, make and receive calls, deliver email, and embed video through REST APIs and SDKs, with global carrier connectivity and delivery handling managed by the platform.

Trusted by over 335,000 companies including Shopify, Cleveland Clinic, Intuit, United Way, and Toyota. Named a Leader in the Gartner Magic Quadrant for CPaaS and in IDC MarketScape reports. Twilio differentiates by combining communications APIs with a Customer Data Platform and AI for personalized, contextual interactions across channels. Official server-side SDKs cover Node.js, Python, PHP, Ruby, C#, and Java, plus client SDKs for video and mobile.

Key capabilities:

• Messaging APIs for SMS, RCS, WhatsApp, and MMS with global number provisioning
• Voice API for making and receiving calls, IVR, SIP trunking, and Elastic SIP Trunking
• Verify and Lookup for OTP delivery, fraud prevention, and phone number validation
• Flex contact center and Studio drag-and-drop workflow builder
• Serverless Functions and TwiML Bins for event-driven communication apps

Teams use Twilio for two-factor authentication, password resets, and account verification. E‑commerce and logistics rely on it for order confirmations, delivery alerts, and transactional SMS. Support and sales operations deploy Flex for contact centers, while developers embed video calling or build custom IVR and call-routing logic with the Voice API.