About ByLeet
ByLeet started as a weekend hack. In late 2019, three quant developers — frustrated by the proprietary, poorly documented tooling at their respective firms — began collaborating on an open-source back-testing framework. The repo gained 3,000 GitHub stars in its first month, and the pull requests kept coming from trading engineers around the world who shared the same pain.
By mid-2021 the side project had outgrown evenings and weekends. The trio incorporated ByLeet, raised a modest seed round from angel investors who were themselves former trading technologists, and committed to a model where the core tools stay open source and revenue comes from managed cloud services, enterprise support, and premium integrations.
Today ByLeet maintains twelve open-source projects with over 45,000 combined GitHub stars. Our managed platform handles strategy deployment, live data feeds, and execution for more than 600 teams across prop shops, crypto funds, and independent algo traders. We hire from the community, contribute upstream relentlessly, and measure success by one metric: how fast a developer can go from a napkin sketch to a live, monitored trading strategy.
Our Mission
To give every trading developer access to best-in-class tooling by building in the open and shipping relentlessly.
Our Values
Open Source First
Our core frameworks and libraries are MIT-licensed and always will be. We believe the best developer tools are shaped by the community that uses them, and we earn revenue by adding value on top — never by locking down the foundation.
Developer Experience
A tool nobody enjoys using is a tool that collects dust. We obsess over API ergonomics, error messages, documentation, and CLI polish because we know that developer happiness translates directly into adoption and productivity.
Velocity
Markets do not wait for quarterly release cycles. We ship continuously, iterate publicly, and treat every merged PR as a small bet on making our users faster. If a feature does not reduce time-to-production, it does not ship.