1Password:
- Both the client and the server code are proprietary.
- Can’t be self-hosted.
- Doesn’t offer any private payment methods.
- Embeds tracking pixels in their newsletters.
- More expensive than Proton Pass and Bitwarden.
- Doesn’t even have an integration with SimpleLogin or addy.io, only with Fastmail.
- Has received 1 billion in VC funding.
- No free tier.