Cloud Functions for Firebase vs Effe: What are the differences?
Cloud Functions for Firebase: Run your mobile backend code without managing servers. Cloud Functions for Firebase lets you create functions that are triggered by Firebase products, such as changes to data in the Realtime Database, uploads to Cloud Storage, new user sign ups via Authentication, and conversion events in Analytics; Effe: A building block for an open source AWS lambda. Effe is an extremely simple building block with which to build a "server-less" architecture. This is a building block, operates on the level of a single lambda function.
Cloud Functions for Firebase and Effe belong to "Serverless / Task Processing" category of the tech stack.
Effe is an open source tool with 231 GitHub stars and 7 GitHub forks. Here's a link to Effe's open source repository on GitHub.