Updated September 28, 2026 · ShieldCue Editorial Team
Proton AG vs Keeper
What sets them apart
| Compare |  Proton AG |  Keeper |
|---|---|---|
| Platforms | Windows, MacOS, Linux, Chromebook, Android, iOS, Chrome, Firefox, Android TV, Apple TV, Amazon Fire TV | Windows, MacOS, Linux, iOS, Android, Web app, Chrome, Firefox, Safari, Edge, Opera |
| Family plan | Pass Family: up to 6 users, 6 Pass Plus accounts, admin panel | 5 private vaults, 10 GB file storage |
| Security audit | Independently audited by third-party experts; audit reports public | SOC 2 Type 2 and SOC 3, ISO 27001/27017/27018, FedRAMP High, GovRAMP, FIPS 140-3, quarterly third-party penetration testing |
| Encryption | Zero-knowledge end-to-end encryption, 256-bit AES-GCM vaults, OpenPGP with ECC Curve25519 for vault keys | 256-bit AES with elliptic-curve cryptography, zero-knowledge record-level encryption on device, PBKDF2 1,000,000 iterations, TLS 1.3 |
| Features | Kill switch, Split tunnelling | TOTP |
| Open source | Yes | Not confirmed |
Same on both: Free plan (Yes), Passkeys (Yes), Zero-knowledge encryption (Yes).
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Key differences
- Keeper scores higher overall: 9.4 vs 9.3.
- Platforms: only Proton AG offers Chromebook, Android TV, Apple TV.
- Platforms: only Keeper offers Web app, Safari, Edge.
- Support channels: only Keeper offers Phone.
- Features: only Proton AG offers Kill switch, Split tunnelling.
- Features: only Keeper 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
Keeper suits readers who want a password manager they can open on a free plan and grow into later, with passkeys, on-device encryption that keeps records unreadable to the provider, and a family plan that covers 5 private vaults, 10 GB file storage.
Score breakdown
| Area | Proton AG | Keeper |
|---|---|---|
| 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 | 9.3Higher |
How they place
| Ranking | Proton AG | Keeper |
|---|---|---|
| Privacy tools | 24 of 280 | 66 of 280 |
| Secure cloud storage and backup | 8 of 70 | 6 of 70 |
| Authenticator apps | 13 of 55 | 9 of 55 |
Every fact side by side
| Fact | Proton AG | Keeper |
|---|---|---|
| Pricing model | Free | Free |
| 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 |
|---|---|---|
| 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 | US |
| Privacy tool type | Ad blocker | Not confirmed |
Secure email
| Fact | Proton AG | Keeper |
|---|---|---|
| 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 |
|---|---|---|
| Free storage | 5 | Not confirmed |
| Compliance certifications | GDPR, HIPAA, ISO 27001 | SOC 2 Type 2, SOC 3, ISO 27001, ISO 27017, ISO 27018, FedRAMP High, GovRAMP Authorized, FIPS 140 3 |
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
Pros
- A free plan is included, and most managers in this comparison offer one too (72.3%).
- Records are encrypted on the device using AES with elliptic-curve cryptography, so a stored vault stays unreadable to the provider, and TLS covers traffic in transit.
- Coverage spans Windows, macOS and Linux, so one vault reaches desktop, mobile, browser extension and web app.
Cons
- The service runs under Keeper Security, Inc. and US terms, which readers in other legal regimes should weigh before storing sensitive logins.
- Phone and chat support are less common than email and help centres in this comparison, at 41.1% and 34.4% of brands, though Keeper's email, chat and phone includes both.
- Shared allowances stop at 5 private vaults, 10 GB file storage, so a household that stores a lot of files needs a bigger tier than the family plan.
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
Who it suits
- Readers who want to try a password manager on a free plan before paying for anything.
- Households that need separate private vaults plus shared file storage, which is what 5 private vaults, 10 GB file storage sets out.
- People who want to reach help through email, chat and phone, including live chat and phone.
Who should look elsewhere
- People who want one ecosystem for everything, since Apple's iOS, iPadOS and macOS covers its own devices and nothing else.
- Teams that need Windows Server coverage, since Windows, Windows Server and macOS lists it and Keeper's Windows, macOS and Linux does not.
- Readers who expect every manager in the comparison to hand out a free plan, since Total Password has none while Keeper does.
Current offers
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
Does Keeper have a free plan?+
Yes. Keeper offers a free plan, and so do most managers in this comparison (72.3%). The free tier shows how the vault behaves with your own accounts, while the paid family plan is where 5 private vaults, 10 GB file storage comes in.
What kind of prices do these password managers sit in?+
Across the brands compared here, monthly plans run as low as €0.87 and as high as €63.95, while longer terms sit between €0.73 and €99. A median long-term price of €3.97 shows where a multi-year commitment usually lands.
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