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Koofr describes multiple protections for stored files and accounts, but ordinary Koofr storage is not presented as end-to-end or zero-knowledge encrypted. Koofr says it encrypts transfers and files on its servers; its optional Koofr Vault is the service’s client-side encryption option. For account protection, Koofr supports TOTP authentication and FIDO2 passkeys, but recovery codes matter: Koofr says support cannot restore access if you lose your second factor.
What Koofr’s security claims do—and don’t—mean
Koofr describes several safeguards: SSL/TLS for transfers, server-side encryption after upload, separation of file content from metadata, and storage of each file in at least three physically separate locations. These are vendor descriptions of its systems, not an independent security assessment. Redundant storage can help protect availability, but it is not the same as encryption and does not by itself establish who can read a file.
- Encryption in transit: Koofr says SSL/TLS protects files while they move between your device and its service.
- Server-side encryption: Koofr says files are encrypted after they reach its servers. That description does not mean that only you hold the key or that standard storage is zero-knowledge.
- Client-side encryption: Koofr offers Vault as an optional feature that encrypts files on your device before upload. Koofr says only the user knows the encryption key.
Koofr’s help center and features page describe the transfer, storage, and redundancy protections. Its privacy page describes Vault’s client-side model. The reviewed official materials do not establish an independent cryptographic audit or penetration-test result, so treat these as Koofr’s claims rather than a guarantee.
Does standard Koofr storage provide zero-knowledge encryption?
No—not according to Koofr’s description of its standard storage. The company distinguishes its server-side encryption from Vault, which it describes as client-side and zero-knowledge. Koofr says Vault encrypts data before it leaves your device and that only you know the encryption key. Its privacy page also says Vault is open source, so its functionality can be inspected; that is not the same as evidence that an independent security review has taken place.
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Vault is the relevant option if your priority is to keep file contents inaccessible to the storage provider through possession of a user-held key. The available official information here does not establish current plan requirements or pricing, so check Koofr’s current terms before deciding whether it fits your account.
Where Koofr says it stores data, and what its policy says it collects
Koofr identifies Koofr d.o.o., headquartered in Ljubljana, Slovenia, as the data controller. Separately, it says its file servers are in Germany, within the EU, in ISO 27001-certified data centers. That certification statement concerns the data centers; it should not be read as proof that every Koofr control has been independently certified. These locations and policy details are Koofr’s statements, not an independent verification of the infrastructure.
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Koofr’s privacy policy says account creation requires a name and email address. Purchases may require additional billing information, with payment processing handled by a third party. The policy also says that selected activity events—including password changes, uploads, deletions, and link creation—are logged and retained for three months. It says account deletion is processed no later than 30 days after a request, except for records Koofr must keep by law, such as invoices.
The same policy says Koofr does not use third-party tracking tools or marketing newsletters and does not sell or give data to advertisers, while acknowledging service providers such as payment processors and accounting providers. These are policy statements; the policy is the appropriate source to consult for current details and exceptions.
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How to protect your Koofr account
File encryption cannot prevent someone from accessing an account with a stolen password or compromised second factor. Koofr documents TOTP codes from an authenticator app and FIDO2 passkeys. Passkeys can be tied to a device or a physical security key such as a YubiKey; Koofr says they offer stronger phishing protection than one-time codes because they verify the site domain.
- Use a unique, strong password. Do not reuse a password from another service.
- Enable a second factor. Choose a TOTP authenticator app or a passkey. Koofr allows multiple second factors, which can provide an alternative if one device is unavailable.
- Save the recovery codes securely. Koofr provides ten one-time recovery codes. Its help center says these are the way to regain access if you lose your second factor, and that support cannot restore access to an account with 2FA enabled. Store the codes somewhere separate from the device used for authentication.
Passkeys reduce exposure to phishing, while TOTP codes remain an option if you do not want to use a passkey. Either way, the recovery process is part of account security: losing both your second factor and the recovery codes may leave you unable to sign in.
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Which Koofr setup fits your privacy needs?
- Routine file storage: Koofr’s stated transfer encryption, server-side encryption, and storage redundancy may suit users comfortable with a provider-managed storage model. They do not establish zero-knowledge privacy.
- Sensitive files that should be encrypted before upload: Consider Koofr Vault and confirm its current availability and terms. Keep control of the encryption key and make a safe backup; losing access to a client-side key can make files unrecoverable.
- Protection against account takeover: Use a unique password and enable TOTP or a passkey. Preserve recovery codes and, where practical, configure an alternate second factor.
There is no basis in the reviewed materials to call Koofr completely safe or to rank it against competitors. The practical distinction is whether Koofr’s provider-managed encryption is enough for your files, or whether you need the additional client-side encryption model it describes for Vault.
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