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LoopBack 4 is the next generation of the LoopBack framework, with a completely rewritten core foundation and significantly improved programming model. If you’re an existing LoopBack user, read Crafting LoopBack 4 to understand the motivations, strategy, and innovations behind this exciting new version.

For more information on the difference between LoopBack 3 and LoopBack 4, see Understanding the differences between LoopBack 3 and LoopBack 4.

To facilitate migration between LoopBack 3 and LoopBack 4, you can mount your LoopBack 3 application on top of a LoopBack 4 project. See Migrating from LoopBack 3 for details.