We Built and Open Sourced a Feature Flagging Platform
Hi. We just open sourced Bullet Train, a Feature Flag and Remote Config platform. It's a collection of tools: server API, admin front end and clients for a bunch of different platforms. Together they allow you to control feature flags and remote config across projects, environments and users. We realised that we were building ad-hoc feature flag stuff into individual projects over and over, so we had a look around to see if there was a way of doing this in a more formal manner. There are a few commercial solutions around but they were quite expensive and seemed to be aimed more at the…
What it does
In the maker’s words, at launch
Hi. We just open sourced Bullet Train, a Feature Flag and Remote Config platform. It's a collection of tools: server API, admin front end and clients for a bunch of different platforms. Together they allow you to control feature flags and remote config across projects, environments and users. We realised that we were building ad-hoc feature flag stuff into individual projects over and over, so we had a look around to see if there was a way of doing this in a more formal manner. There are a few commercial solutions around but they were quite expensive and seemed to be aimed more at the enterprise. We wanted something that was targeting start-ups and dev agencies, because that's what we do. The platform is 100% Open Source, so you can self host all of it if you want. We're also hosting an API and admin front end for people for free right now. If we can get enough interest we will start offering paid hosting plans that are priced for startups and small businesses, but right now we are just trying to build some interest in the open source projects. Ideally we'd love some feedback on the product and some help writing clients for languages like Go and .Net where we don't have the expertise to do so. You can check it out at https://bullet-train.io/ Thanks!
Does the same job
all alternatives →


- FFFecusio – Feature flagging and release management tool2025 · fecusio.com · ▲8
Hello everyone! To briefly introduce myself, I'm mainly a backend developer, working in the industry for the past 7 years. On one of the products I was working on we were heavily using a custom feature flagging system. Basically, any functionality we were building was starting with a new feature flag. It was useful because: 1. We were able to silently deploy a feature to production for real environment testing 2. We would enable feature flag for specific users across our team, like marketing, sales, so everyone can check it out, test and prepare for the release 3. We were restricting certain…
- FOFlagsmith – open-source feature flag and remote config service2021 · github.com · ▲23
More dev tools this month
the category →



Open-source GTM skills for technical founders
Dev tools · 29d ago · gtmcofounder.com

OpenTrailPaper is open-source bike computer firmware for the LilyGO T5S3 4.7" E-Paper PRO. It supports offline maps, GPX routes, FIT recording and Bluetooth sensors.
Dev tools · 2d ago · opentrailpaper.com

Launched alongside, June 2018
the whole month →

- OL
Dev tools · 2018 · openlogos.org
Google Podcasts▲649Discover and listen to the world's podcasts on Android.
Work · 2018 · play.google.com

- WD
Life & fun · 2018 · whydoiprocrastinate.com