ClickSend API
ClickSend ships an open, self-serve messaging API: free signup, dashboard API keys, public REST v3 docs, and official SDKs across about ten languages. Coverage spans SMS, MMS, voice, fax, email, and post with no sales gate to production.
Frequently asked questions
ClickSend scores A on the API Report Card. ClickSend ships an open, self-serve messaging API: free signup, dashboard API keys, public REST v3 docs, and official SDKs across about ten languages. Coverage spans SMS, MMS, voice, fax, email, and post with no sales gate to production.
ClickSend has a workable official integration path. Most engineering teams can build against it directly. Open API: self-serve, documented, with SDKs
ClickSend is a cloud communications platform that lets businesses send and receive SMS, MMS, voice, fax, email, letters, and postcards through a single REST API and dashboard.
ClickSend serves businesses and developers that need programmatic multichannel messaging, from startups embedding SMS notifications to enterprises running bulk campaigns and automated document delivery. Teams typically use ClickSend to send transactional SMS, appointment reminders, marketing broadcasts, MMS, and automated letters or postcards, and to receive inbound messages.
ClickSend is an established global messaging provider used by businesses across many countries, though public customer counts were not available in the cited research.
ClickSend holds message history, delivery receipts, contact lists, inbound messages, and account and usage records. This communications data is reachable programmatically through the REST API and SDKs, letting customers send, retrieve, and manage messaging records and contacts.
ClickSend maintains a modern REST API currently at version 3, with OpenAPI/Swagger specifications, official SDKs on GitHub, and a Postman collection.
Common alternatives include Twilio, Vonage, Plivo, MessageBird. Graded alternatives appear under "More from the report card" below.
Grades measure one thing: can a customer's engineering team get their own data out programmatically? We check six things (whether a real API exists, how access is gated, data coverage, auth quality, docs and developer experience, and stability) and roll them into a letter grade. Grades get re-verified, and they only move on evidence.