Open infrastructure for WhatsApp messaging.
Blastup is an open-source WhatsApp broadcast and chatbot platform developed by Kalp Intelligence. It provides an unmetered, privacy-first alternative to closed, per-message cloud APIs.
Why we built Blastup
Businesses wanting to communicate with their audience on WhatsApp are typically faced with high per-conversation fees, strict template delays, and proprietary platform lock-in.
We created Blastup under the MIT license to give developers and teams direct control over their WhatsApp communication: send unlimited broadcasts, build automated 24/7 chatflows, and self-host on their own servers with complete data ownership.
What sets Blastup apart
Released under the MIT License. Deploy via Docker Compose or Node.js on any server. No subscription fees, no user limits, and full code transparency.
Send broadcasts to segmented contact groups with personalized merge tags, action buttons, and product sliders. Built-in SafeMode delay pacing keeps your numbers healthy.
Construct automated inquiry workflows and lead capture forms in a visual node editor. Test conversational journeys instantly in an interactive phone simulator.