Browser Extensions · head to head
Keeper vs Violentmonkey
Keeper
Browser Extensions
Protect your passwords and private information
- From
- Free
- Rated
- -
The short version
- Each has a real cost: Keeper free tier is severely limited to 10 passwords on a single device; essentially a trial rather than a usable free version; Violentmonkey smaller script ecosystem compared to Tampermonkey which has larger user base and more available scripts
- They diverge on capability: Keeper covers Password management, Violentmonkey covers Userscript support.
Where they differ
Only the attributes on which Keeper and Violentmonkey actually diverge.
| Attribute | Keeper | Violentmonkey |
|---|---|---|
| Platforms | Chrome, Firefox, Edge, Safari, Brave, Opera, iOS, Android, macOS, Windows | Chrome, Firefox, Edge |
| Founded | 2011 | 2013 |
Identical on both: starting price (Free), pricing model (Unknown), free tier (Yes), user rating (Not yet rated), category (Browser Extensions).
What each one covers
Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.
Only in Keeper
- Password management
- Zero-knowledge encryption
- Secure file storage
- BreachWatch
- Safari support
Only in Violentmonkey
- Userscript support
- Clean interface
- Cloud sync
- Script editor
Both cover
- Chrome support
- Firefox support
- Edge support
- Opera support
What people use each for
The jobs each tool is most often brought in to do.
Keeper
- Business and enterprise password management with zero-knowledge encryptionnot Violentmonkey
- Privileged access management for admin and service accountsnot Violentmonkey
- Secure remote access and privileged session recordingnot Violentmonkey
- Application secrets management through Secrets Managernot Violentmonkey
- Government deployments requiring FedRAMP Highnot Violentmonkey
Violentmonkey
- Run open-source userscripts to customize or automate web pagesnot Keeper
- Import scripts compatible with Greasemonkey and Tampermonkey formatsnot Keeper
- Sync scripts and settings across browsers via Dropbox, OneDrive, Google Drive, or WebDAVnot Keeper
- Batch import/export scripts as zip filesnot Keeper
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Keeper
- Free tier is severely limited to 10 passwords on a single device; essentially a trial rather than a usable free version
- Personal plan at $1.79/month is promotional pricing; regular price is higher, making budget comparison difficult
Violentmonkey
- Smaller script ecosystem compared to Tampermonkey which has larger user base and more available scripts
- Less marketing and visibility results in lower adoption compared to more widely-known alternatives
- Community maintenance model means slower feature development compared to commercial alternatives
Pricing, plan by plan
Keeper
Free- FreeFree
- 10 passwords max
- Single device only
- No sync
- Personal$1.79/month
- Unlimited passwords
- All devices
- 2FA support
- Family$3.83/month
- Up to 5 users
- Unlimited storage
- Shared vaults
Violentmonkey
FreeNo published plan breakdown. See the Violentmonkey review.
Which should you pick?
Choose Keeper if
- You need password management.
- You want to start without paying.
- You work on Chrome, Firefox, Edge, Safari, Brave, Opera, iOS, Android, macOS, Windows.
- You also want zero-knowledge encryption.
Choose Violentmonkey if
- You need userscript support.
- You want to start without paying.
- You work on Chrome, Firefox, Edge.
- You also want clean interface.
Questions people ask
- Is Keeper or Violentmonkey better?
- Neither clearly leads. Keeper starts at Free and Violentmonkey at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Keeper or Violentmonkey?
- Keeper starts at Free and Violentmonkey at Free.
- Does Keeper or Violentmonkey run on more platforms?
- Keeper runs on Chrome, Firefox, Edge, Safari, Brave, Opera, iOS, Android, macOS, Windows. Violentmonkey runs on Chrome, Firefox, Edge.
- Can I use Keeper for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is Keeper best used for?
- Keeper is most often used for business and enterprise password management with zero-knowledge encryption, privileged access management for admin and service accounts, secure remote access and privileged session recording, application secrets management through secrets manager. Of those, business and enterprise password management with zero-knowledge encryption and privileged access management for admin and service accounts are not what Violentmonkey is typically brought in for.
- What can Keeper do that Violentmonkey cannot?
- Keeper covers Password management, Zero-knowledge encryption, Secure file storage, BreachWatch. Violentmonkey covers Userscript support, Clean interface, Cloud sync, Script editor. Both handle Chrome support, Firefox support, Edge support, Opera support.
Answered from the vendors’ own pages
Keeper: Is there a free version of Keeper?
Keeper offers a free version with very limited functionality: it stores only 10 passwords on a single mobile device with no cross-device sync. A 30-day free trial provides full access to all features.
SourceViolentmonkey: Is Violentmonkey open-source?
Yes. Violentmonkey is fully open-source and available on GitHub, making it free to use and community-maintained unlike Tampermonkey which has a larger proprietary ecosystem.
SourceKeeper: What are Keeper's paid pricing plans?
Keeper Personal starts at $1.79/month (promotional pricing) with annual billing. Keeper Family covers up to 5 users at $3.83/month annually. Both include unlimited password storage, cross-device sync, and 2FA support.
SourceViolentmonkey: What browsers does Violentmonkey support?
Violentmonkey works on browsers with WebExtensions support, including Chrome, Firefox, Edge, and other Chromium-based browsers.
SourceKeeper: What browsers and devices does Keeper support?
Keeper has browser extensions for Chrome, Firefox, Edge, Safari, Brave, and Opera. It also offers native apps for iOS, Android, macOS, Windows, and web access.
SourceViolentmonkey: How does Violentmonkey compare to Tampermonkey in performance?
Community benchmarks show Violentmonkey uses about 15 to 30 percent less RAM on Chrome compared to Tampermonkey when managing many open tabs.
SourceKeeper: Does Keeper support 2FA and passkeys?
Yes, Keeper stores and autofills FIDO2 passkeys and supports multiple 2FA methods including TOTP, SMS, and WebAuthn. Biometric login (fingerprint/face recognition) is also supported.
SourceViolentmonkey: What is the current version of Violentmonkey?
Violentmonkey reached version 2.46.0 as of July 31, 2026, with active ongoing development and regular updates to the open-source project.
SourceKeeper: How secure is Keeper?
Keeper uses zero-knowledge architecture where data is encrypted and decrypted only on your device. Only you can access your vault, and the company cannot see your passwords or data.
Source