Dashlane

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Do not build this. The cryptography is audited, and this is not a place to be original.

Every account you own sits behind it. Autofill that works across browsers and mobile keyboards is its own long-tail engineering problem, and a bundled VPN is a network you would be renting anyway.

WHAT TO DO INSTEAD
- Keep it, or move to Bitwarden, which is open source, audited, cheaper and self-hostable if you want the data on your own machines
- Look at the bundle honestly: if you are paying for a VPN you never switch on, you are paying twice for a password manager

WHAT YOU CAN BUILD, AND SHOULD

An auditor over your own vault, from the manager's export or command-line tool. Local, no server, nothing kept:
- Reused passwords, ranked by how much each account matters
- Weak passwords by entropy, and any in a breach corpus, checked with k-anonymity so nothing leaves your machine
- Accounts with no second factor where the service supports one
- Entries whose domain no longer resolves or now redirects elsewhere — a login for a company that was acquired is a login on somebody else's system
- Credentials untouched for years on accounts that matter
- A short quarterly report you act on

Read, report, and clear the export. Put the cleanup in the script rather than trusting yourself to remember it.

ON BREACH MONITORING
You can do this yourself for nothing: check each address against a public breach corpus using the k-anonymity range API, where only a hash prefix is sent and the address never leaves your machine. That is a fifty-line script and it is the same signal the paid feature provides.

THE THING NOBODY TESTS
Recovery. If your phone and laptop both vanished today, could you get back in? Rehearse it once, write down what you did, and keep it somewhere physical. That answer decides whether the manager is protecting you or holding you hostage.

THE ONE-LINE VERSION
Never write the crypto. Write the auditor, check the breach list yourself, and test your recovery.