Tresorit is widely recognised as the gold-standard zero-knowledge encrypted cloud storage product, popular among UK firms with high data sensitivity requirements. Accupe's Client Hub takes a different posture: encrypted, audited document exchange embedded inside the practice manager. For firms weighing security against operational workflow, here are the honest trade-offs.
The Tresorit Security Story
Tresorit's defining feature is end-to-end zero-knowledge encryption - Tresorit itself cannot read your data, only the authorised devices holding the encryption keys. ISO 27001 certified, EU-hosted, with strong access controls and audit logs. For firms that demand absolute cryptographic separation between provider and content, Tresorit's posture is hard to match.
The Accupe Client Hub Approach
Accupe's Client Hub encrypts documents in transit and at rest, with role-based access, audit logs and signed-URL access controls. We are honest that this is not the same as zero-knowledge encryption - Accupe technically holds the keys necessary to render documents in the browser. For most UK practices this is appropriate; for firms handling exceptionally sensitive material (e.g. some forensic work, certain ultra-high-net-worth clients), zero-knowledge may still be required.
What Accupe adds that Tresorit cannot is operational context. A document in the Client Hub is connected to a client record, a Smart Board job, an engagement letter, a Compliance Radar status. Tresorit is a vault; Accupe is a vault plus the entire workflow that uses it.
Client Experience
Tresorit's sharing model is functional - secure links, password protection, expiry dates. The client receives a link and opens a Tresorit interface. Accupe's Client Hub is the firm's own branded portal where clients log in to see documents, messages, signature requests and job status in one place. For premium positioning, the integrated experience is stronger.
Regulatory Fit
Both meet UK GDPR requirements. Tresorit's zero-knowledge posture is a strong story for clients who explicitly ask "can your software vendor read my data". Accupe's posture is "encrypted, audited, role-based" with strong controls but without the same cryptographic promise. For most regulated UK accounting and advisory work, either is defensible.
Pricing
Tresorit Business starts around £12 per user per month and Business Plus around £20 per user per month. A five-person firm pays £60-£100 per month for Tresorit alone. Accupe Growth at £55 per month total for five users includes the Client Hub alongside the full practice management suite.
When To Run Both
Firms with mixed needs sometimes run Accupe as the operational platform and Tresorit as a dedicated vault for the most sensitive material that needs zero-knowledge guarantees. This is a perfectly reasonable architecture.
Verdict
Tresorit is the right answer when zero-knowledge encryption is a strict requirement. Accupe is the right answer when your need is a beautifully integrated, encrypted, audited client portal that also runs the work attached to those documents. For most UK accounting firms in 2026, the integrated approach wins on user experience and operational coherence.