It's great you disclosed this information, and you wrote an excellent article imo.

I hope it's fair to say that you work for a direct competitor to Heroku, and that the intention of the article is to share how you've learned from the parts of Heroku that people loved and are working to build on these ideas in the work you're doing (which is great!). I'd prefer knowing that the article is written by a competitor at the start versus casually towards the end.

I hope I didn't offend you by my comment! :)