Koofr is a Slovenian cloud storage service operated by Koofr d.o.o., based at Stegne 23A in Ljubljana and a long-time member of Technology Park Ljubljana. Founded in 2013, it celebrated its tenth year of service in 2023 and is one of the cleaner small-vendor EU storage listings in this directory, fully Slovenian-incorporated, EU-owned, with no US parent, no US VC, and no PE on record.
The infrastructure story is solid: Koofr stores all customer data in ISO 27001-certified data centres in Germany, markets itself as "GDPR compliant by default," and explicitly commits to not scanning, indexing or tracking customer files. Standard transport encryption and encrypted storage apply to all accounts. For users who want true zero-knowledge encryption, Koofr offers Koofr Vault, a client-side-encrypted layer where files are encrypted in the browser/app before upload, so Koofr cannot read them. Koofr Vault is fully open-source, so its encryption can be independently audited. The apps and web UI are localised into more than 20 languages, including most major EU languages (German, French, Italian, Spanish, Dutch, Polish, Portuguese, Swedish, and others) alongside Slovenian and several global languages. A distinctive feature is that Koofr can connect and unify external clouds (Dropbox, Google Drive, OneDrive, Amazon) into a single interface, which is useful for migration but should be understood by privacy-focused buyers as an opt-in bridge to non-EU services.
For an EU-sovereignty audit the open question is documentation, not infrastructure. At audit no public DPA and no sub-processors list could be surfaced on koofr.eu. The underlying signal mix is otherwise strong (Slovenian entity, German ISO 27001 hosting, no file scanning, optional client-side encryption via Koofr Vault, no CLOUD Act exposure); the missing documentation is the gap to resolve on the next pass rather than a structural weakness.
Pricing is freemium and unusually granular: 10 GB free forever; "Briefcase" tiers from €0.50/month (25 GB) and €1/month (100 GB); "Suitcase" tiers €4-10/month (250 GB to 1 TB); "Crate" tiers €20-35/month (2.5-5 TB) plus custom 10 TB+. Note that subscriptions are currently billed yearly and prices include 22% Slovenian VAT. Long-term subscribers can also join a Loyalty Program offering subscription discounts of up to 50%. The former free-storage referral scheme has been discontinued; there is no monetary affiliate programme. Best fit: privacy-conscious EU individuals and small teams who want German-hosted storage from an independent Slovenian vendor, especially those who will use Koofr Vault for sensitive files.