Secure cloud storage cost for a small team: seats, encryption and file limits

Disclosure: We may earn a commission from clearly labeled partner links. Required capabilities, eligibility and total cost determine the recommendation, not affiliate status.

The cost verdict: minimum seats and required security controls decide the small-team bill before price per GB. A two-person team needing end-to-end encrypted storage cannot assume Box Starter is equivalent to Proton Drive or Tresorit. A team already covered by its existing productivity suite may need no new storage subscription at all.

Why this existing guide has a narrower job

This established URL now owns secure small-team storage economics rather than a generic cheapest-cloud list. The separate Dropbox/Google/OneDrive comparison retains incumbent-suite buying intent. AMF covers business storage workflow fit. API/object storage is not treated as a substitute for an employee file-sharing plan.

First-party public references were checked October 8, 2026. The selected European prices are EUR; taxes and contract-specific discounts require confirmation. Annual equivalents below imply annual billing/commitment, not cancellable monthly payments. No supplier's security marketing is presented as independent proof of legal compliance or protection against every threat.

Qualify before calculating

Write down whether you need end-to-end encryption, organization administration, SSO, external collaboration, maximum file size, pooled capacity and offboarding. Mark each as required or optional. Storage that fits all files but lacks a mandatory access control is not an eligible bargain. Conversely, buying an enterprise bundle for optional features can waste money even when the supplier has a compelling security story.

End-to-end encryption is a particular architectural claim, not a synonym for encryption in transit or at rest. It can affect recovery, search and collaboration. Check the actual implementation and selected plan, not just a vendor logo. Box's base business service must not be described here as end-to-end encrypted by default; vendor-managed security and optional key-control products are different requirements.

Box Starter is a 100 GB total starter product, not 100 GB for every seat. Its €4.50 price cannot serve a team needing a terabyte even if the people count fits. Tresorit's “starts at” capacity is not a promise to multiply 6 TB by every extra user. Proton's 1 TB per user and two-user minimum are the current business-page reference, not an older one-user assumption.

Two, three and ten-person annual bills

Formula = max(actual paid people, minimum billed seats) × annual-equivalent monthly rate × twelve. Extra external seats, storage expansions and add-ons are not included. A two-person Box Starter buyer pays for three seats: the apparent €4.50 rate becomes €6.75 per actual person per month. Proton's two-person reference is €7.99 per actual person, but provides a different capacity and encryption proposition. The cheapest number alone does not settle eligibility.

If two people require a terabyte each and E2EE, Box Starter fails both the modeled capacity and the encryption requirement. Proton Drive Professional is the lower listed baseline than the three-seat Tresorit Business minimum in this narrow reference. That does not prove Proton has the buyer's required SSO, enterprise policy, recovery or external workflow. Confirm those first; Tresorit's higher bill can be justified by a requirement absent from the cheaper offer.

Large files and collaborators create hidden upgrades

A creative team sharing 8 GB source files cannot use Box Business's 5 GB upload limit. Business Plus becomes the relevant Box reference, and its three-user annual baseline is €810 rather than €486. A 17 GB file exceeds Tresorit Business's 15 GB reference and may require Business Pro or a separate approved transfer workflow. Do not split confidential files just to make a pricing table work without considering operational cost and policy.

Box Business lists paid external collaboration; Business Plus lists unlimited external collaborators. Count who must join the workspace rather than assuming every shared-link recipient is a paid collaborator. Ask for a quote if client access creates licensing. The difference between a recipient downloading a link and a collaborator editing managed content can change the invoice.

Unlimited storage is subject to plan and fair-use terms and is not an independently tested infinite-capacity promise. Storage extension, data residency, advanced key management, governance and support may be separate products. A feature described elsewhere on the vendor's site is not necessarily included in the plan priced here.

Do you need a suite or just storage?

Proton Workspace Standard's current annual reference is €12.99/user/month and includes services beyond Drive. Against Drive Professional's €7.99, that is €5 extra per user per month, or €180/year for three users. It is economical only if the included services replace necessary paid products or satisfy requirements worth that increment. Do not subtract a VPN/password-manager subscription that the team will actually retain.

Google Workspace and Microsoft 365 remain valid non-affiliate controls when existing licenses already satisfy the storage and security requirement. Their marginal storage subscription can be zero without pretending their architecture is identical to Tresorit or Proton. Use the incumbent comparison for current suite capacity and regional billing. Dropbox Advanced is another control if its actual security configuration and three-seat minimum fit; no alternative must win because it has a partner route.

Migration and renewal are part of the bill

Inventory versions, links, ownership, retention and permissions before switching. Data transfer can be straightforward while external collaboration and recovery policy require more work. Do not promise hours saved or zero downtime without a tested migration scope. Keep one-time labor, subscription overlap and recurring vendor charges separate.

A €200/year saving does not justify a €1,000 migration solely on first-year cost. Model your actual labor and overlap using the cost-avoidance worksheet. Annual seat reductions, refund rules and renewal timing should be in the order before purchase. For temporary projects a higher monthly rate can cost less in cash than an unused year of minimum seats.

Commercial routes and direct evidence

Explore Box's product offering (partner link). The approved default is not represented as a specific pricing checkout. Explore Tresorit business plans (partner link). Explore Proton Drive (partner link; private-cloud landing page). Proton's approved route enters the consumer product; business buyers should check the direct business evidence before evaluating it. We do not invent a business-pricing deep link.

First-party sources: Box pricing, Tresorit business pricing, Proton Drive business pricing and Dropbox control, checked October 8, 2026. Claims about encryption are attributed vendor descriptions, not independent penetration tests or legal assurances.

• Dropbox product reference
• Meeting archive retention costs
• Monitoring and reporting cost units
• Domains, records and privacy-related software bills
• Software cost reference hub