For context: I'm Fran Mendez, I created the AsyncAPI standard. I launched Commune earlier this year because I wanted to have a community layer on top of my newsletter hosted on Kit. As with AsyncAPI, I knew I wasn't alone and figured it could be of interest for other people too. People started asking for the sending part so I built that as well. Fun fact, one of my newsletter issues talked about why I'm not building yet another email service. Lol, life! Also, as a developer myself, I want tools to integrate with each other. Commune is no exception so I made sure it has its own API, MCP, and developer portal:
https://usecommune.dev. If you're running a newsletter, I'd love for you to try it. It's all free unless you send emails with Commune.