So are ya open source or aren't ya? Tim Anderson Thu 21 Jan 2021 // 10:15 UTC Share Copy Elastic CEO and co-founder Shay Banon has attacked AWS for what he claims is unacceptable use of the open-source Elasticsearch product and trademark. Banon's post is part of the company's defence of its decision to drop the open-source Apache 2.0 licence for its ElasticSearch and Kibana products and instead use the copyleft SSPL or restrictive Elastic licence – though the plan is to add provisions to mitigate this by having code revert to the Apache 2.0 licence after a period of up to five years. The new rant makes explicit that the purpose of the licence change is to make it harder for AWS to use Elastic's code. According to Banon, AWS has been "doing things that we think are just NOT OK since 2015." Banon said that "we've tried every avenue available including going through the courts," presumably a reference to this lawsuit [PDF], the outcome of which is not yet determined.