Maximillian Laumeister


Bitcoin transaction visualizer

What is BitListen? is a piece of software I wrote that visualizes people sending bitcoins to each other. Bitcoin is an online currency that can be sent and received worldwide. What this means is that every time anyone sends bitcoins to anyone else, a bubble appears on for everyone to see. The bigger the bubble, the more money was sent. If you hang out long enough you may see some pretty large bubbles, sometimes they even fill the whole screen!


BitListen, formerly known as Listen To Bitcoin, was featured on National Public Radio (NPR) as part of one of their All Things Considered radio segments. It was also featured on the front page of the popular tech news source The Verge. It has over 300,000 unique visitors, and has been forked into many different spin-off projects on GitHub, including Listen To Wikipedia. Additional publications: The Boston Globe, VICE, Co.Exist.

Tech Stack

BitListen is a client-side web application written in HTML, CSS, Javascript and jQuery, and it pulls realtime transaction information via WebSocket from a 3rd-party API. The nature of the Bitcoin network and the API connection means that it takes less than 10 seconds between someone clicking the “send money” button in their Bitcoin client and the time that the transaction appears on In addition to the transaction bubbles, BitListen also keeps up with the Bitcoin exchange rate from Bitstamp and displays it in the upper left.

BitListen is open source and MIT licensed.

Note: I no longer own, it was sold.