Asterisk

Building on it: what may you do?

Short answers based on the licence, for the version in the catalog.

• B1 Change the code for internal use in your company Yes Yes, as long as you don't distribute it.
• B2 Build your own product or service on top and offer it to customers as SaaS Yes Yes. Running it as a service is not distribution.
• B3 Make a closed-source derivative and sell or distribute it No No. If you distribute it, the whole work must carry the same licence, with source.
• B4 Use the project's name and trademark No No, not without permission. The licence covers the code, not the name or logo.

Keep in mind

• Dual licensing: the vendor also sells a commercial licence if the terms above don't suit you.
• There is a licence note for this product (e.g. parts under another licence or version-specific terms): read it and check the licence of the exact version you use.

This is guidance, not legal advice. Check with a lawyer before deciding.