Pivots and millions later, I built a lambda to start WhatsApp chats
I've been working on my startup for years to no avail. Raised VC money and burned through millions - now built a simple service that lets you add a "chat to us" button (or can hook to your forms) to launch a WhatsApp chat. The key here is that the button can open chats with different WhatsApp numbers based on rules you can set. These rules can be based on the website visitor's geography, language, time spent on your site or even your business's office hours. Can also hook onto existing forms and use form fields in the rules too. Try it out on our site by clicking the chat to us button and…
In plain words
Compose.im is a service that adds WhatsApp chat buttons to websites and forms. It routes conversations to different WhatsApp numbers based on customizable rules, such as visitor location, language, time spent on site, business hours, or form field data. The tool is designed for businesses that want to offer direct WhatsApp support to customers without building custom integration infrastructure.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
I've been working on my startup for years to no avail. Raised VC money and burned through millions - now built a simple service that lets you add a "chat to us" button (or can hook to your forms) to launch a WhatsApp chat. The key here is that the button can open chats with different WhatsApp numbers based on rules you can set. These rules can be based on the website visitor's geography, language, time spent on your site or even your business's office hours. Can also hook onto existing forms and use form fields in the rules too. Try it out on our site by clicking the chat to us button and send over a message if you'd like to get this setup on your site.
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