(AWS had EC2 before Elastic’s trademark was registered.)
(AWS had EC2 before Elastic’s trademark was registered.)
FTA: When the service launched, imagine our surprise when the Amazon CTO tweeted that the service was released in collaboration with us. It was not. And over the years, we have heard repeatedly that this confusion persists. NOT OK.
In this specific case, it doesn't seem tricky to me. When you have concrete examples of people getting confused, no speculation is needed.
As a user, I don't care in the least about the business relationship behind the product. I care about whether Amazon RDS works like SQL Server and whether Amazon Elasticsearch Service works like Elasticsearch. What financial arrangements, if any, are behind the scenes are not a concern to users.
From Amazon's perspective, if they contributed a single fix, or asked a single question of ElasticSearch on the issue tracker, then this is a product born from colloboration.
It's difficult to think anyone is going to think that Amazon ElasticSearch is by anyone other than Amazon.