Q&A: Changing the game for creators: how Substack doubled mobile build speed with Bitrise

Substack, initially launched in 2017 as a newsletter and email distribution platform, has significantly evolved to offer a multi-format publishing app launched in 2022, enabling creators to engage with their audiences through text, audio, and video. This transformation has been supported by Bitrise, a mobile-focused CI platform, which streamlined Substack's mobile app development by consolidating complex CI workflows and improving build speeds for both iOS and Android. The app facilitates direct relationships between creators and their audiences, with Substack aiming to be a central hub for various content types. Bitrise's integration has allowed for enhanced UI testing capabilities and reduced maintenance overhead, providing Substack's lean team with a robust mobile infrastructure. This has enabled Substack to focus on expanding its team and services, ensuring a scalable and efficient platform for creators.