Stream Chat vs. ClickSend

Stream Chat is a messaging API and SDK suite for developers building in-app chat. Teams integrate it to ship production messaging in weeks instead of building and maintaining real-time infrastructure in-house. Client SDKs cover React, Swift, Android, Flutter, React Native, Angular, JavaScript, Unity, and Unreal, each with a UI kit you can customize or replace entirely. The backend runs on Go and RocksDB across 12 global edge locations, holding sub-40ms latency and 5M concurrent connections in a single channel behind a 99.999% uptime SLA.

ClickSend is a simple, reliable SMS platform built for businesses that can't afford to miss a message. It’s seriously simple infrastructure that works straight out of the box — and keeps working as you grow. Backed by genuinely helpful 24/7 support from people who actually know their stuff. Send from the Dashboard in just a few clicks — or straight from your email inbox. Build with our clean, well-loved API docs. Or connect through hundreds of integrations and slot it straight into the tools your team already uses. Most users are up and sending within minutes.