Updated September 28, 2026 · ShieldCue Editorial Team
Proton AG vs Keeper Secrets Manager
Proton AG vs Keeper Secrets Manager: the differences
| Compare |  Proton AG |  Keeper Secrets Manager |
|---|---|---|
| Platforms | Windows, MacOS, Linux, Chromebook, Android, iOS, Chrome, Firefox, Android TV, Apple TV, Amazon Fire TV | Windows, MacOS, Linux, Web vault, Browser extension (Chrome, Firefox, Safari, Edge, Opera, Brave), iOS, Android, Command line interface (Commander CLI, Secrets Manager CLI), KeeperChat, KeeperDB |
| Family plan | Pass Family: up to 6 users, 6 Pass Plus accounts, admin panel | 5 private vaults, up to 5 users, 10 GB secure file storage |
| Security audit | Independently audited by third-party experts; audit reports public | SOC 2, ISO 27001/27017/27018, FIPS 140-3, FedRAMP High; quarterly third-party penetration testing |
| Encryption | Zero-knowledge end-to-end encryption, 256-bit AES-GCM vaults, OpenPGP with ECC Curve25519 for vault keys | AES 256-bit plus elliptic-curve cryptography, zero-knowledge, device-level and record-level encryption |
| Features | Kill switch, Split tunnelling | TOTP |
| Open source | Yes | Not confirmed |
| Zero-knowledge encryption | Yes | Not confirmed |
Same on both: Free plan (Yes), Passkeys (Yes).
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Key differences
- Keeper Secrets Manager scores higher overall: 9.4 vs 9.3.
- Platforms: only Proton AG offers Chromebook, Chrome, Firefox.
- Platforms: only Keeper Secrets Manager offers Web vault, Browser extension (Chrome, Firefox, Safari, Edge, Opera, Brave), Command line interface (Commander CLI, Secrets Manager CLI).
- Support channels: only Keeper Secrets Manager offers Phone.
- Pricing model: only Keeper Secrets Manager offers Budget.
- Features: only Proton AG offers Kill switch, Split tunnelling.
- Features: only Keeper Secrets Manager offers TOTP.
Our verdict on each
Proton AG
Proton AG suits readers who want a published no-logs audit, a free tier and a bundled privacy suite rather than a bare tunnel, with the company based in Switzerland. Paid plans reach servers in from 140 countries and cover 10 devices, alongside free storage of 5 GB.
Keeper Secrets Manager
Keeper Secrets Manager suits households that want a free plan beside a paid tier, and buyers who read audit certificates before signing up.
Score breakdown
| Area | Proton AG | Keeper Secrets Manager |
|---|---|---|
| Cost | 9.3 | 9.3 |
| Offer | 9.4Term choice runs to 24 months with a 30-day refund window, and a free plan anchors entry pricing. | 9.6Higher |
| Privacy | 8.9 | Not confirmed |
Where they rank in our lists
| Ranking | Proton AG | Keeper Secrets Manager |
|---|---|---|
| Authenticator apps | 13 of 55 | 10 of 55 |
Licences and countries
| Country | Proton AG | Keeper Secrets Manager |
|---|---|---|
| Headquarters | Switzerland | United States |
Every fact side by side
| Fact | Proton AG | Keeper Secrets Manager |
|---|---|---|
| Pricing model | Free | Free, BudgetCovers more |
| Legal entity | Proton AG | Keeper Security, Inc. |
| Headquarters | Switzerland | United States |
| Founded | 2014 | Not confirmed |
| Support channels | Email, Chat, Help centre, Community | Email, Chat, Phone, Help centre, CommunityCovers more |
Privacy tools
| Fact | Proton AG | Keeper Secrets Manager |
|---|---|---|
| Free plan limits | No data or speed limits, no ads, no time limit, 1 device, servers in 10 countries randomly selected, medium speed. | Not confirmed |
| Protocols | WireGuard, OpenVPN | Not confirmed |
| Logging policy | No activity logs | Not confirmed |
| Jurisdiction | CH | Not confirmed |
| Privacy tool type | Ad blocker | Not confirmed |
Secure email
| Fact | Proton AG | Keeper Secrets Manager |
|---|---|---|
| End-to-end encryption | The VPN connection from the user's device to Proton's servers; Proton also markets Proton for Business with end-to-end encryption. | Not confirmed |
Encrypted storage
| Fact | Proton AG | Keeper Secrets Manager |
|---|---|---|
| Free storage | 5 | Not confirmed |
| Compliance certifications | GDPR, HIPAA, ISO 27001 | Not confirmed |
Pros and cons
Proton AG
Pros
- No-logs claims are audited rather than asserted: Securitum's audit (Securitum, 2026) sits behind a No activity logs policy.
- Free limits come with no caps on data or speed, no ads and no time limit.
- 10 simultaneous devices, above the ranked VPN median of 8.
Cons
- Support runs on email, chat and help centre, and there is no phone line among them.
- The free plan limits put you on a single device at medium speed with randomly selected countries, so constant use points at a paid plan.
- End-to-end encryption is marketed for Proton for Business, while the consumer plan encrypts only the connection from your device to Proton's servers.
Keeper Secrets Manager
Pros
- A free plan is available, and free and budget places Keeper in the free and budget segment, so a start costs nothing.
- Passkeys are supported and totp adds verification codes, covering the usual second factor inside the vault.
- Platforms span Windows, macOS and Linux, so the same account covers desktop, mobile, browser and command line.
Cons
- Its feature list is short, totp, so verification codes and passkeys are the extras rather than a wide menu.
- Plan capacity is fixed: the family plan includes 5 private vaults, up to 5 users, 10 GB secure file storage, so larger households plan around those limits.
- Budget buyers should compare tiers first: the site median entry price is €6.84 and the monthly median is €7.89.
Who each suits
Proton AG
Who it suits
- Readers who want a VPN, a passkey vault and encrypted storage under a single account instead of separate subscriptions.
- Families sharing storage, since Pass Family covers several users and Pass Plus seats through a single admin panel.
- Teams buying under a business audience (business) who need GDPR, HIPAA and ISO 27001 certifications on file.
Who should look elsewhere
- Anyone needing more devices on a single account: Proton covers 10, while ESET Brasil plans run 3 to 25 devices.
- Readers choosing purely on server spread: AVG lists from 100 countries, a base close to Proton's from 140.
- Readers who want a different audit trail to compare: Session Technology Foundation lists Quarkslab 2021 against Proton's Securitum, 2026.
Keeper Secrets Manager
Who it suits
- People who want to try before paying: the free plan is available, and free and budget puts Keeper in the free and budget segment.
- Mixed device households, since clients run for Windows, macOS and Linux.
- Buyers who check certifications first, given the SOC and ISO audits, FedRAMP High and quarterly third-party penetration testing.
Who should look elsewhere
- Total Password does not offer a free plan, so it suits people ready to pay from the start.
- Apple Inc. covers iOS, iPadOS and macOS, so it is the pick for Apple-only setups rather than the wider Windows, macOS and Linux.
- ESET Brasil covers Windows, Windows Server and macOS including Windows Server, a platform the Keeper list does not name.
Current offers
Keeper Secrets Manager
Current offer
Free trial
30-day free trial: 30 days free
Personal and family plans, via get-keeper.html signup
Source, checked September 26, 2026
Questions about each
Proton AG
What does Proton VPN cost, and how long are the commitments?+
The longest plan runs 24 months, the service is listed on a free model, and paid plans carry a 30-day money-back window. Across the ranked VPN field, monthly pricing has a median of €7.02 and long-term pricing a median of €3.97, which frames any quote you see.
Is there a free plan, and what are its limits?+
Yes. The free plan has no caps on data or speed, no ads and no time limit. It runs on a single device, reaches servers in a randomly selected group of countries and delivers medium speed, so the paid tier, which covers 10 devices, is the practical step for constant use.
Keeper Secrets Manager
What does Keeper cost, and what do I pay at renewal?+
Keeper has a free plan, and free and budget places it in the free and budget segment, so entry can cost nothing. Across the site the median entry price is €6.84 and the monthly median is €7.89. Read your chosen tier's renewal figure too, since a long-term rate can differ from the first one.
Is Keeper independently audited, and who runs it?+
The operator, Keeper Security, Inc., is based in the United States. It publishes SOC and ISO certifications plus FedRAMP High, and it runs quarterly third-party penetration testing. Data is encrypted with AES and elliptic-curve cryptography at device and record level, so stored records stay readable to the account holder.
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