Is ArangoDB free?

ArangoDb community is free, which you can install on your computer (Windows, linux, etc.) This is what I use! I'm pretty sure you can go far with the free version... and you upgrade when you need to upgrade. If you have BIG DATA, you can buy the Enterprise server. This can be useful for big data companies and organizations, or if you need end-to-end encryption. You can also use Arango Oasis, which is a cloud offering (not free, because you rent a server).