fastlane lets you define and run your deployment pipelines for different environments. It helps you unify your app’s release process and automate the whole process. fastlane connects all fastlane tools and third party tools, like CocoaPods.

In short Bitrise is a Continous Integration and Delivery (CI/CD) Platform as a Service (PaaS) with a main focus on mobile app development (iOS, Android). You can automate the testing and deployment of your apps with just a few clicks. When you trigger a build a Virtual Machine is assigned to host your build and your defined Workflow (series of Steps scripts) will be executed, step by step.