Browser extension for Buttercup

Buttercup promo image
What is Buttercup?

Buttercup is a robust browser extension that operates as a highly secure password manager. It allows users to manage their online identities and credentials. Buttercup utilizes advanced industry techniques to provide encrypted storage options, including Dropbox, Google Drive, or even a WebDAV connection. It also offers an intuitive vault editing interface where users can keep different types of data such as logins, websites, notes, and even securely-encrypted attachments. The extension will automatically prompt users to save new login details, ensuring maximum security and convenience.

Users: 4,436
Version: 2.26.0 (Last updated: 2023-11-09)
Creation date: 2020-07-02
Risk impact: High risk impact
Risk likelihood: Very low risk likelihood
Manifest version: 2
  • clipboardWrite
  • contextMenus
  • http://*/*
  • https://*/*
  • storage
  • tabs
  • unlimitedStorage
Size: 2.17M
Stats date:

Other platforms

Buttercup (v2.26.0)
4.55 (22) 596
Buttercup (v2.26.0)
5.00 (2) 632
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Manage your online identities and credentials with Buttercup: An open-source, free and secure password manager. Buttercup uses the strongest industry techniques to encrypt and store your details in a variety of locations of your choosing. Use Dropbox, Google Drive or a WebDAV connection to remotely host your archive for high accessibility. You can also connect local files when using the Desktop application (background).

The extension also contains a full-featured vault editing interface so you can even use it as a standalone application. Manage your data using different item types (logins, websites, notes etc.) and even store securely-encrypted attachments (drag-and-drop files).

Buttercup's browser extension allows you to easily log in to all of your online profiles and sites, is extremely secure, is easy to use and completely free of charge. We collect no data about you or any activities you perform. Keep your master password safe as it is the only way to open your archive and access your credentials.

Newly detected logins will cause the extension to prompt you to save them - add all of your online authentication details to keep your accounts safe!

User reviews
User reviews summary
These summaries are automatically generated weekly using AI based on recent user reviews. Chrome Web Store does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.
  • Great replacement for LastPass on the desktop
  • Well thought out and looks great
  • Gives you complete control over your passwords
  • Cross-platform compatibility
  • Simple and easy-to-use
  • Can cause high CPU load
  • Can become unstable and crash
  • Does not keep the vault unlocked when closing and reopening the browser
  • Issues with the save password option
  • Cannot deactivate from toolbar or mark pages to never ask to save password
Most mentioned
  • Great password manager
  • Open source
  • Secure
  • Needs improvement
  • High CPU load
View all user reviews
Risk impact

Buttercup is risky to use as it requires a number of sensitive permissions that can potentially harm your browser and steal your data. Exercise caution when installing this extension. Review carefully before installing. We recommend that you only install Buttercup if you trust the publisher.

Risk likelihood

Buttercup has earned a good reputation and can be trusted.

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Promo images
Buttercup small promo image
Small promo image
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