ElasticSearch basically had the same problem so you could consider adopting their license (or adapting it in extremely well defined way): https://www.elastic.c

ElasticSearch basically had the same problem so you could consider adopting their license (or adapting it in extremely well defined way): https://www.elastic.co/blog/elastic-license-v2 https://www.elastic.co/blog/elastic-license-v2 At least you will have a chance of not scaring off anyone with a legal department.