Short answer (checked 29 October 2026): Boxcryptor no longer runs. Its operator, Secomba GmbH, ceased all operations on 31 December 2025, and the service went with it. What replaces it depends on what you used it for. If you want to keep your files in Dropbox, Google Drive or OneDrive and encrypt them on top, Cryptomator is the closest like-for-like tool. If you are on a Dropbox team plan, Dropbox now has its own end-to-end encrypted team folders. If you would rather drop the separate encryption layer and use storage that encrypts every file by default, Tresorit and ShieldFive both do that.
What happened to Boxcryptor
Boxcryptor encrypted files on your device before they reached a cloud provider you already used, so Dropbox, Google Drive or OneDrive only ever held ciphertext. The timeline:
- 29 November 2022: Secomba announced the sale of Boxcryptor's technology to Dropbox. Existing contracts ran until their end date, and no customer data or keys moved to Dropbox.
- Early 2023: new registrations closed, free accounts were deactivated, and Secomba went into liquidation (the "i.L." in its name).
- June 2024: Dropbox shipped end-to-end encryption for team folders. The engineering write-up is by Robert Freudenreich and Andrea Pfundmeier, Boxcryptor's founders.
- 31 December 2025: Secomba ceased all operational activities, and with it, Boxcryptor. Its website now shows a single goodbye notice.
If you still have files encrypted with Boxcryptor (the .bc files) that you did not decrypt before the shutdown, no other tool can open them without your Boxcryptor keys, and that includes ShieldFive. Boxcryptor's notice still lists [email protected] for urgent cases, without a guaranteed reply.
The four realistic replacements
Cryptomator: keep your cloud, add encryption. This is the same model as Boxcryptor: an encrypted vault that sits inside the sync folder of whichever cloud you use. It is open source (GPL-3.0) and free on Windows, macOS and Linux. The iOS and Android apps are free to read, with write access a one-time purchase (€29.99 at list price). Cryptomator Hub adds shared vaults and key management for teams. It encrypts file contents, file names and folder names; the cloud provider still sees how many files the vault holds and roughly how large they are. Its crypto libraries were audited by Cure53 in 2017.
Dropbox end-to-end encrypted team folders. If your team is on Dropbox Advanced, Business Plus or Enterprise, Dropbox can encrypt team folders on the device before upload, at no extra cost. Dropbox has said encrypted folders cannot be shared with people outside the team. Personal plans are not on the list, and the feature covers Dropbox only, not Google Drive or OneDrive.
Tresorit: encrypted storage with certifications. Tresorit encrypts every file by default and replaces the cloud rather than sitting on top of one. It holds ISO/IEC 27001 and Common Criteria EAL4+ certification and is priced for organisations. It was a common destination for Boxcryptor business customers. Our Tresorit comparison covers it in detail.
ShieldFive: encrypted storage, encrypted by default. Like Tresorit, ShieldFive replaces the cloud. There is no vault to create and no folder to remember: every file and filename is encrypted on your device before upload, on every plan.
ShieldFive: what it does, and its limits
ShieldFive stores only ciphertext and never holds your keys. Your password never reaches our servers: the browser derives a separate login value with Argon2id and sends only that. Web uploads default to post-quantum hybrid encryption (ML-KEM-1024 with XChaCha20-Poly1305), with AES-256-GCM as a fallback; the Android app uses the same format and is in Google Play testing. A document request lets a client upload files to you through one link, without an account, which covers the "send me the documents securely" job many Boxcryptor business users had.
The limits, stated plainly. ShieldFive is not a layer over Dropbox or OneDrive, so moving to it means moving the files. There is no desktop sync client and no iOS app yet; Boxcryptor's drive-letter workflow has no equivalent today. We serve the web app's code, so the guarantee holds for the code you are served. File sizes and timestamps are not encrypted. The crypto core is open source (Apache-2.0) but the apps are not, and no external security audit has been completed. Review the security model and current plans before choosing.
At a glance
| Cryptomator | Dropbox E2EE | Tresorit | ShieldFive | |
|---|---|---|---|---|
| Model | Vault inside your existing cloud | Team folders inside Dropbox | Its own encrypted storage | Its own encrypted storage |
| Works with Google Drive / OneDrive | Yes | No | No (replaces them) | No (replaces them) |
| Encrypted by default | Inside the vault only | Folders you enable | Yes | Yes, every file and filename |
| Open source | Yes (GPL-3.0) | No | No | Crypto core (Apache-2.0) |
| Post-quantum on stored files | No | No | Migration announced, not live | Hybrid default on web and Android |
| Desktop sync / iOS | Yes / Yes | Yes / Yes | Yes / Yes | No / No |
| Personal use | Free on desktop | Not on personal plans | Paid plans | Free 10 GB; 2 TB from €10/month |
| External certification or audit | Cure53 crypto audit (2017) | Dropbox's company certifications | ISO 27001, CC EAL4+ | None yet |
Which one fits you
- You want Boxcryptor back, as it was: Cryptomator. Same model, your existing cloud, open source.
- Your company already pays for Dropbox Advanced or above: turn on end-to-end encrypted team folders first. It costs nothing extra.
- Procurement needs certifications, or you need admin depth: Tresorit.
- You want storage that is encrypted by default, a free tier or a one-time Lifetime plan, and you can work through the web or Android today: ShieldFive. Test upload, sharing and recovery with disposable files before moving anything important.
For the wider field, our comparison of zero-knowledge cloud storage providers covers ten options.
Boxcryptor's status was checked on its own website on 29 October 2026. Cryptomator's pricing and licence were checked on its site and GitHub on the same day; Dropbox's plan list comes from its June 2024 launch and should be confirmed on Dropbox's current plan page. Tresorit details as of the Tresorit comparison.