Honest comparison. We list what competitors do well and where they differ from Paramant. This page is updated when competitor facts change.
Last updated: April 2026 · All claims verified against official company documentation, press releases, and independent reviews.
| Capability | Paramant | Zivver | Tresorit | WeTransfer | SFTP |
|---|---|---|---|---|---|
| Post-quantum encryption (ML-KEM) | ML-KEM-768 (NIST L3) | None | Roadmap announced 2025 | None | None (classical only) |
| Client-side encryption | Default | Zero-access encryption | Default | TLS + AES at rest | SSH channel encryption |
| Burn on first read | Default, HTTP 410 | Persistent storage | Persistent storage | 3-day default retention | Persistent on disk |
| RAM-only, no disk persistence | Yes | Disk-based | Cloud storage | Cloud storage | Disk-based |
| Public CT log for transfers | Merkle tree, signed STH | Internal logs | Internal logs | Email notifications | Mutable server logs |
| Company HQ jurisdiction | Netherlands | NL (Kiteworks parent, CA US) | Switzerland + EU offices | Netherlands (Bending Spoons, IT) | Depends on operator |
| Ownership | NL, founder-owned | Kiteworks, San Mateo CA | Swiss Post (state-owned CH) | Bending Spoons, Italy | Open source (OpenSSH) |
| CLOUD Act exposure | None | Yes, via parent | None | None via ownership | Depends on operator |
| Self-hostable | BUSL-1.1 source available | SaaS only | SaaS only | SaaS only | Open source by default |
| Outlook / Gmail integration | Not available | Strong native plugin | Plugin available | Limited integration | Protocol only |
| DLP / human error prevention | Not available | ML-based, native | Basic policies | Not available | Not available |
| Anonymous sending (no account) | ParaSend, 5 MB | Account required | Account required | Up to 3 GB free | Authentication required |
| ISO 27001 certification | Roadmap 2026 | Certified | Certified | Certified | N/A (protocol) |
| SOC 2 Type II | Not yet | Certified | Certified | SOC 2 Type I | N/A (protocol) |
| IEC 62443 OT documentation | Sector-specific relay | Not positioned | Not positioned | Not positioned | Not positioned |
None of these products are bad. They solve different problems, often well. Here is where each one is genuinely strong and where it differs from Paramant.
Zivver is the leading secure email product in Dutch healthcare and government. Strong Outlook and Gmail integration, machine learning for data loss prevention, strong admin dashboards. If your primary need is preventing human error in email sending, Zivver is excellent.
In June 2025, Zivver was acquired by Kiteworks, a California-based company that has raised $610M primarily from US investors. Zivver remains headquartered in Amsterdam, but data handling policies now operate under a US parent company structure. This introduces CLOUD Act considerations that were not present before the acquisition.
Sources: Kiteworks press release June 18 2025; Zivver company blog; PitchBook Kiteworks profile.
Tresorit is a mature zero-knowledge cloud storage and collaboration platform. Independently audited by Ernst and Young and Computest. ISO 27001 and EAL4+ certified. Strong enterprise features including granular permission management and data residency choice across 12 EU and Swiss regions.
Tresorit has been majority-owned by Swiss Post (Swiss state-owned postal service) since 2021. Under Swiss jurisdiction, not subject to US CLOUD Act. Tresorit operates as cloud storage with persistent files, not as a burn-on-read relay. Post-quantum cryptography is on their announced roadmap but implementation status as of April 2026 is not public.
Sources: Swiss Post press release July 2021; Tresorit transparency report; Tresorit blog post on PQC November 2025.
WeTransfer is the category-defining file sharing tool for casual and creative use. Free tier allows 3 GB per transfer with 10 transfers per month. Pro and Ultimate tiers offer up to 300 GB transfers and unlimited storage. Excellent for video review workflows, client delivery of media assets, and one-off sends where security is not primary.
WeTransfer uses TLS in transit and AES-256 at rest, but does not offer end-to-end encryption. WeTransfer holds the decryption keys, meaning the company has technical ability to access file content. Acquired by Italian company Bending Spoons in 2024. Headquartered in Amsterdam with Italian ownership. No CLOUD Act exposure via ownership. Not suitable for regulated sector data that requires zero-knowledge architecture.
Sources: WeTransfer support documentation; onerep.com 2026 security review; Bending Spoons acquisition announcement.
SFTP over SSH is a mature, universally supported protocol for server-to-server file transfer. If you run your own infrastructure and control both ends of the transfer, SFTP works well and is free. Widely available on every Unix system.
SFTP encrypts the channel, not the file. The server operator has full read access to files after upload. Files persist on disk until manually deleted. Server logs are mutable. No cryptographic proof of delivery. Not post-quantum by default (RSA and ECDSA key exchange). Not a complete solution for regulated file exchange with external parties.
| Your primary need | Best choice | Why |
|---|---|---|
| Casual file sharing, photos, videos | WeTransfer | Simplest UX, no account needed, 3 GB free |
| Outlook-integrated secure email | Zivver | Dominant plugin, strong DLP and ML features |
| Enterprise cloud storage with collaboration | Tresorit | Mature product, ISO 27001, 12 data residency regions |
| Server-to-server automated transfer | SFTP | Free, universal, runs on your infrastructure |
| Regulated sector with EU data sovereignty | Paramant | No US owner, no CLOUD Act, post-quantum, RAM-only |
| Industrial OT / SCADA / IEC 62443 | Paramant | Only provider with OT-specific positioning |
| Post-quantum encryption today | Paramant | ML-KEM-768 Level 3 in production since 2024 |
| Files that auto-destroy after receipt | Paramant | Burn-on-read is the default, not an option |
| Self-host option | Paramant | BUSL-1.1, Docker, Raspberry Pi capable |
Paramant occupies a specific position. It is a post-quantum encrypted file relay with RAM-only storage, burn-on-read delivery, and public cryptographic transparency. It is not a cloud storage product, not an email plugin, and not a DLP platform.
For organizations that need the combination of EU data sovereignty (without US ownership), post-quantum cryptography (today, not roadmap), zero-knowledge architecture (mathematically, not by policy), and the option to self-host, Paramant is presently the only option in this category.
For any other use case, one of the alternatives above is likely a better fit. That honesty is the point.