Intellectual property is important and making everything open source would allow our competitors to easily copy it or at least get an idea how to improve their products. It is hard to seriously compare the features, the security design, and the UX of Bitwarden to 1Password — it is not close. Just a few examples: being able to edit your data while offline, ability have large notes with Markdown formatting (aka "Moby Dick Workout"), support for large datasets (more than 100,000 items).
1Password has been in business for 17 years, longer that any other password manager. It is very difficult to have a long term business model built completely on open source.
1Password has been in business for 17 years, longer that any other password manager. It is very difficult to have a long term business model built completely on open source.