All these lovely services in the comments that I would love to use at work, but I can't because, I'm in the UK, working with somewhat sensitive personal data and there is no way we can commit that stuff to a data centre in the U.S somewhere these days. I'm not sure what the solution is, other than letting people self-host.
Second this. All these fancy services are neat but hosting private data in the US is seen in Europe as a major security risk, when it's not a complete no-no. Would be cool to know about self-hosted options.