Kapso – WhatsApp for developers
Hey HN, I'm Andres. I've been building Kapso as a solo founder, and just crossed 4,000 developers, all organic. WhatsApp has 3B+ users and 98% open rates. You'd expect developers to be building tons of stuff on it, especially when the US is the fastest-growing market in WhatsApp usage. But it’s not happening… And I'd bet it's because the DX is painful. Every team needs to build the same features again and again. Meta fires webhooks for everything. There's valuable data in there for debugging, but no way to make sense of it without building your own tooling. That’s why I built Kapso. What you…
Kapso – WhatsApp for developers launched on December 23, 2025 with 48 votes, #443 of 11,628 launches that month and more than 90% of that year's launches.
In plain words
Kapso is a developer platform that simplifies building WhatsApp applications. It provides pre-built APIs, message tracking, and debugging tools to reduce development time from days to minutes. The platform includes an inbox interface, multi-tenant setup for managing multiple customer accounts, and a workflow builder for automations. Kapso addresses the complexity developers face when integrating WhatsApp's webhook system, offering observability and tooling that would otherwise require custom development.
written from the facts on this page · September 2026
From the sources
The fastest way to add WhatsApp to your product. Connect in 2 minutes, integrate this afternoon. Ship to 3 billion WhatsApp users today.
The fastest way to add official WhatsApp to your product. Send messages, receive webhooks, connect customer-owned numbers, and build AI-powered WhatsApp workflows. Use a Kapso sandbox number, instant setup with a pre-verified number, or customer connection links for multi-tenant products. Let customers connect their own WhatsApp accounts to your product. Kapso is built for humans and AI agents. Use the CLI from a terminal, Kapso WhatsApp MCP for live WhatsApp operations, and Kapso agent skills inside coding tools. curl -fsSL https://kapso.com/install.sh | bash kapso setup kapso whatsapp messages send --phone-number "<phone-number-id>" --to 15551234567 --text "Hello" Start with Build with AI…from kapso.ai
In the maker’s words, at launch
Hey HN, I'm Andres. I've been building Kapso as a solo founder, and just crossed 4,000 developers, all organic. WhatsApp has 3B+ users and 98% open rates. You'd expect developers to be building tons of stuff on it, especially when the US is the fastest-growing market in WhatsApp usage. But it’s not happening… And I'd…
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