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Though Vuze was also one of the earliest clients and it's also open source for some reasons it never really became popular. Maybe because it's a Java client?
Earlier quoted context omitted.
Or MATLAB.
I was going to write that software too, but still think that Matlab is so much superior, or maybe is the nostalgia from university years.
Cal.com is open-source Calendly, has raised $32M, and shares their stats publicly: https://cal.com/open
PostHog is open-source Mixpanel/Amplitude, has raised $39M, and appears to be widely recommended these days.
Examples I haven't seen mentioned yet: Firefox. Atom/VSCode (Sublime Text clones). Android (iOS clone). Various databases (postgres, mongodb, etc). Reddit (Digg alternative, since closed source) though I'm not sure releasing their source code had anything to do with their success. HashiCorp in general sort of counts though it's harder to say "it was competing against X".
In this sense, I consider Zed to be more of in the Sublime Text genre than VSCode or Atom was.
GitLab, Mattermost, RocketChat would be a few good examples of products that began as OSS alternatives to well-established players. Outline ( https://www.getoutline.com ) is successful on most metrics you'd judge a business and OSS project on. I'm not sure if any of these ever pitched themselves explicitly that way on HN though. I think explicitly labeling as an "Open source alternative" brings a lot of baggage and e…
GitLab is definitely the most obvious success at $600M+ in revenue, but a couple new ones are Cal.com and PostHog. Cal.com is open-source Calendly, has raised $32M, and shares their stats publicly: https://cal.com/open PostHog is open-source Mixpanel/Amplitude, has raised $39M, and appears to be widely recommended these days.