Do we need a commercial license for self-hosted Discourse?

We want to use discourse as a community portal in our commercial application.

Investigated - Its open source with GNU GPL licence.

Do we need commercial license for self-hosted discourse, if we need to include that in our commercial application.?

If yes, can anyone please provide the details regarding the license + support cost.?

You do not need to pay to use the software. You do need to pay for support (unless you can get it here). See discourse/ at master · discourse/discourse · GitHub and the FAQ section of If you need support for a self hosted installation there are people like me who can help. (post in #marketplace or find my contact info in my profile).