daistore's code is released under the Mozilla Public License 2.0. It is a file-level free software license: it protects the shared core without touching what you build around it.
Download, install and embed daistore in a product, commercial or not, with no royalty.
If you change a core file, you publish that modified file under the same license. The community benefits, and so do you.
Your apps, themes and in-house connectors in their own files remain your property. You choose their license and their price.
Full license text: mozilla.org/MPL/2.0 · official FAQ. MPL 2.0 is compatible with the GPL and the EUPL.