Comment by 0xbadcafebee

WoodpeckerCI for DIY, Drone.io for paid support. Self-hosted, OAuth login, repo-permission-based authorization, container-native design, easy web UI, optional RDBMS, supports many platforms. All the core features needed for scalable CI, deploy as few/many as you want for multiple teams, small enough to easily run on one box for one repo. Nothing else is as simple, easy, powerful, compatible.