Can I use strapi free in my self-hosted server?

I’m new to strapi and I’m not very sure if this is the right place to ask my question. I’m going to develop a commercial application which I’d like to use strapi as admin and API part. I’m wondering if this is free? And what kind of restriction if I’m using free version? Thanks.

The only restrictions on the free version is that audit-logs and Review Workflows are not available that is it