Best Encrypted Cloud Storage in 2026
Short answer: Proton Drive is the most secure encrypted cloud storage for most people in 2026, with zero-knowledge encryption on every file by default and Drive Plus offering 200GB on an annual promotional rate (check current USD pricing on proton.me). Sync.com is the pick for straightforward encrypted backup and sharing starting at $4/mo for 150GB, with no upsell needed to get end-to-end encryption. Tresorit fits regulated teams that need Swiss-hosted, audited zero-knowledge storage with granular sharing controls. pCloud and Koofr only encrypt end-to-end inside an add-on folder, not the whole account. Icedrive, Internxt, and MEGA round out the list on price, open-source clients, and free-tier size.
8 zero-knowledge and encrypted storage providers compared on price, what is actually end-to-end encrypted, and where each one cuts a corner, with prices checked on vendor pages in September 2026.
Encrypted cloud storage is not one thing. Some providers encrypt every file end-to-end by default, so nobody but you holds the key. Others encrypt data in transit and at rest on their own servers, which stops a hacker who steals a hard drive but not the provider itself, and then sell you a separate "zero-knowledge" folder as an upgrade. Buyers who assume "encrypted" always means the vendor cannot read their files get an unpleasant surprise when a subpoena or a data breach draws that line for them.
Toolradar data: across the 33 cloud storage and file-management tools we track, 67% ship a free or freemium tier and 33% are paid-only (11 tools), so a free plan is common in this category, but a free plan with real zero-knowledge encryption attached to it is rarer than the marketing suggests.
This guide ranks 8 providers for the specific job of encrypted storage: which ones are zero-knowledge by default, which ones sell it as an add-on, and what each one actually costs once the discount period ends. For general-purpose storage where encryption is not the deciding factor, see best cloud storage, and for the wider protection layer around the data itself, see best data security platforms.
How we ranked: these 8 were set against the 33 cloud storage tools tracked in the catalog, every price was checked on the vendor's own pricing page in September 2026, and no pick is a paid placement.
Top Picks
Picked by editorial review, informed by G2 and Capterra review volume and rating and by media mentions, the signals behind our category rankings. How we rate
| Tool | Starting price | Rating | Best for |
|---|---|---|---|
| Proton Drive | Check current pricing | 4.3170 reviews | Buyers who want end-to-end encryption on the whole account without an add-on or upsell |
| Sync.com | From $3.50/mo (Personal, 150GB, annual) | 4.356 reviews | Buyers who want encrypted backup and sync without changing their daily workflow |
| Tresorit | Check current pricing | 4.6397 reviews | Regulated teams that need encrypted sharing controls, not just encrypted storage |
| Icedrive | From $99/yr (Pro, 2TB, annual) | 4.1884 reviews | Buyers who want zero-knowledge encryption with a named cipher at a confirmed annual price |
| Internxt | Check current pricing | 3.541 reviews | Buyers who want open-source encryption clients and post-quantum cryptography specifically |
| pCloud | Check current pricing | 4.3353 reviews | Buyers who only need zero-knowledge encryption on a subset of files, not the whole account |
| MEGA | Check current pricing | 4.41,132 reviews | Buyers who want a large free zero-knowledge tier before committing to a paid plan |
| Koofr | Publishes prices in EUR only | 4.576 reviews | EU-based buyers who want GDPR-first hosting and do not need USD billing |
Buyers who want end-to-end encryption on the whole account without an add-on or upsell
Buyers who want encrypted backup and sync without changing their daily workflow
Sync.com offers a generous free tier and competitive pricing for its Pro Solo plans, especially considering the strong focus on privacy and end-to-end encryption.
Watch out
Teams plans have a 3-user minimum
Regulated teams that need encrypted sharing controls, not just encrypted storage
Tresorit's pricing is on the higher end compared to general cloud storage providers, but fair for its specialized end-to-end encrypted, Swiss-hosted service.
Buyers who want zero-knowledge encryption with a named cipher at a confirmed annual price
While not the absolute cheapest on the market, the value proposition is strong for users prioritizing security and versioning.
Watch out
Higher storage tiers increase versioning days
Buyers who want open-source encryption clients and post-quantum cryptography specifically
Internxt's pricing model is incredibly generous, offering significant storage for a one-time payment, which is a rare and highly valuable proposition in the cloud storage market.
Buyers who only need zero-knowledge encryption on a subset of files, not the whole account
pCloud's lifetime plans are exceptional value - pay once, use forever.
Buyers who want a large free zero-knowledge tier before committing to a paid plan
MEGA offers a very generous free tier with 50 GB of storage, making it highly accessible.
Watch out
Business plan scales quickly with users/storage
EU-based buyers who want GDPR-first hosting and do not need USD billing
Watch out
Potential high costs for larger storage tiers
End-to-end encryption vs encryption at rest, in 40 words
End-to-end (zero-knowledge) encryption locks a file on your device before it ever reaches the provider's server, so only you hold the key. Encryption at rest locks the file on the provider's server using a key the provider controls, which protects against theft but not against the provider itself, a court order, or a breach of its key store.
Zero-knowledge is the stronger guarantee, but it comes with a real cost: if you lose your password or recovery key, nobody, including the provider, can get your files back. Providers that only encrypt at rest can usually reset your password, because they still hold the keys.
Every product on this list encrypts data in transit and at rest at minimum. What separates the picks is whether zero-knowledge coverage is the default for the whole account (Proton Drive, Sync.com, Tresorit, Icedrive, Internxt) or an optional add-on layered onto server-side encrypted storage (pCloud's Crypto folder, Koofr's Vault). Neither model is wrong, but a buyer who wants zero-knowledge on every file, not just the ones they remember to drag into a special folder, needs to know which model they are getting before they sign up.
Why default encryption, not an add-on, is the buying question in 2026
Cloud storage breaches keep landing on companies that encrypted data at rest but held the keys themselves, because a stolen admin credential or a compelled disclosure bypasses at-rest encryption entirely. A provider that cannot read your files cannot be forced to hand them over in a readable form, and cannot lose them to an attacker who compromises its own infrastructure the way MEGA's encryption scheme was shown to be theoretically weakened by cryptographers in 2022, a finding MEGA patched and that an independent audit later confirmed did not amount to a practical break of its zero-knowledge model.
The second driver is jurisdiction. Proton Drive and Internxt both lean on zero-knowledge architecture plus EU or Swiss hosting as a combined pitch: even a valid legal request only gets the requester encrypted data nobody at the company can decrypt. For a buyer whose threat model is a subpoena, a lawsuit, or a state actor rather than a random hacker, where the servers sit matters as much as the algorithm. For a buyer who mainly wants encrypted photo and document backup without changing daily habits, Sync.com and pCloud both compete on being close enough to a Dropbox-like experience while adding encryption most mainstream providers skip.
Key Features to Look For
Zero-knowledge by default, not by add-on (Essential)
Proton Drive, Sync.com, Tresorit, Icedrive, and Internxt encrypt every file client-side before upload, with no separate folder or subscription tier required to get that guarantee.
A named encryption algorithm, not a marketing claim (Essential)
Icedrive documents Twofish for its zero-knowledge layer, Internxt documents post-quantum cryptography on top of AES, and Proton and Tresorit publish independent audits. A vendor that will not name its cipher is not one to trust with sensitive files.
Recovery that does not defeat the encryption (Essential)
Zero-knowledge storage means the provider cannot reset a lost password for you. Proton and Tresorit both offer a recovery phrase generated at signup; losing both the password and the phrase means the files are unrecoverable by design.
Real-time sync and version history (Important)
Proton Drive keeps up to 10 years of file version history on paid tiers; Sync.com and pCloud both sync changes across devices the way Dropbox does, so encryption does not mean giving up the convenience of a synced folder.
Sharing controls that survive the encryption (Important)
Tresorit's link sharing supports expiry dates, download limits, and watermarking on encrypted files, aimed at teams sending sensitive documents outside the company, not just personal backup.
Where the add-on model shows up (Important)
pCloud's Crypto folder and Koofr's Vault both bolt zero-knowledge encryption onto an account that is otherwise only encrypted at rest, at an extra cost on top of base storage.
Jurisdiction and data residency (Nice to have)
Proton (Switzerland), Tresorit (Switzerland and the EU), Internxt (EU), and Koofr (EU) all market their hosting location as part of the privacy pitch, distinct from the encryption itself.
A meaningful free tier (Nice to have)
Proton Free ships 5GB with the same zero-knowledge encryption as the paid tiers, and Koofr's free plan runs 10GB, so a buyer can test the actual encryption model before paying for storage.
What to settle before you upload anything sensitive
Check the free tier's real limits before assuming it covers your use case. Proton Free is 5GB, Koofr's free plan is 10GB, and MEGA's free allowance changes over time, so confirm the current number on the vendor's own page before planning around it.
Compare the annual-versus-monthly gap, not just the sticker price. Icedrive's promotional annual rate sits well below its list price, and several other picks on this list show a similar spread between the first-year price and the renewal price.
If the buying case is a team, not a single user, check whether the provider's sharing controls (expiry dates, watermarking, download limits) survive the encryption. Tresorit is built for that; several consumer-first picks on this list are not.
Evaluation Checklist
On Proton Drive, confirm which plan includes VPN and Mail before assuming Drive Plus alone covers your needs; only Proton Unlimited and above bundle the wider Proton suite.
On Sync.com, check whether the price you saw is the promotional rate or the regular rate before budgeting past the first billing cycle.
On pCloud, confirm whether the Crypto add-on is billed separately from the base storage plan, since it is not included in Premium or Premium Plus by default.
On Tresorit, ask directly for current personal-plan USD pricing before signing up rather than trusting a cached number from a review site.
On Icedrive, check whether the price shown is the discounted first-term rate or the list price that applies on renewal.
On Internxt, confirm whether the monthly rate or the annual-billed rate applies to the quote you were given, since the two differ substantially.
On MEGA, ask for current plan pricing directly and get the storage and transfer quota for that exact tier in writing.
On Koofr, confirm the price shown includes VAT, since the vendor states plainly that its listed prices include 22% VAT and can vary by country.
Pricing Overview
Entry zero-knowledge storage
Sync.com Personal (150GB) and Icedrive Pro (2TB) on annual billing, for a single user who wants default zero-knowledge encryption without a big commitment. Proton Drive Plus and pCloud Premium's USD prices render client-side and were not confirmed from our region.
About $4 to $9/mo
Mid-tier encrypted storage
Sync.com's Pro Solo 5TB on standard monthly billing, for buyers who need more room or want to avoid an annual lock-in. pCloud Premium Plus and Internxt Essential's USD prices were not confirmed from our region; check current pricing directly on each vendor's site.
$16/mo (confirmed)
Business-grade or quote-based
Tresorit and MEGA's current personal-plan pricing, and any team plan across this list; check current pricing directly on the vendor's site.
Contact vendor
Pricing Comparison
| Tool | Starting price | What it covers | Billing |
|---|---|---|---|
Check current pricing (Drive Plus, 200GB) | Zero-knowledge encryption on every file by default, 10-year version history, free tier at 5GB. | Annual (promotional rate) | |
$3.50/mo (Personal, 150GB, annual) | Zero-knowledge encryption by default, Canada-hosted, no separate encryption add-on needed. | Monthly or annual | |
Check current pricing (Premium, 500GB) | Server-side encryption by default; the Crypto folder adds zero-knowledge encryption at extra cost on top. | Annual (promotional rate) | |
Icedrive | $99/yr (Pro, 2TB, annual) | Zero-knowledge encryption using Twofish, native desktop apps, also billed at $9.99/mo monthly. | Annual |
Tresorit | Check current pricing | Zero-knowledge encryption, Swiss and EU hosting, owned by Swiss Post; personal plans run Essential (about 1TB) and Pro (about 4TB). | Annual (per vendor) |
Check current pricing | User-held encryption keys, independently audited after a 2022 cryptography review flagged a theoretical weakness that MEGA patched. | Monthly or annual | |
Internxt | Check current pricing (Essential, 1TB) | Zero-knowledge and post-quantum encryption, open-source clients, EU-hosted. | Monthly or annual |
Koofr | Publishes prices in EUR only | Server-side encryption by default; Koofr Vault adds zero-knowledge "Safe Boxes," included from the free 10GB tier up. | Annual only |
Prices were checked on vendor pricing pages on September 25, 2026; figures shown are the USD numerals each vendor itself publishes, never a currency conversion. Proton Drive, pCloud, and Internxt render their USD prices client-side and did not return a confirmed figure to our region; check current pricing directly on each vendor's site. Tresorit and MEGA: check current pricing directly on the vendor's site. Koofr publishes no USD price. Sources checked: Proton Drive pricing, Sync.com pricing, pCloud pricing, Icedrive plans, Internxt pricing, Koofr pricing. No paid placement. See cloud storage for the wider catalog, or Proton Drive alternatives if none of these picks fit.
Mistakes to Avoid
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Budgeting off the first-year promotional price. Icedrive's Pro plan renews at its higher list price after the promotional first term ends, and several other picks on this list show a similar gap between the signup rate and the renewal rate.
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Treating MEGA's 2022 cryptography finding as disqualifying rather than as data. The weakness was patched and a later independent audit found the core zero-knowledge model sound; that is a different risk profile than an unpatched or unaudited vulnerability.
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Picking Koofr or a EUR-only provider and expecting a USD invoice. Koofr states its prices include VAT and publishes no USD list price; a US buyer paying in EUR takes on currency conversion risk on every renewal.
Expert Tips
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Write down the recovery phrase the day you sign up, not after the first time you get locked out. Zero-knowledge storage cannot be reset by the provider, so this single step is the difference between a forgotten password and permanent data loss.
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Confirm the renewal price before the promotional term ends. Icedrive and several competitors advertise a first-term rate well below the list price; check the vendor's own pricing page again before the renewal date, not just at signup.
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Treat any number you did not read on the vendor's own page today as unverified. A price from a review site, a forum post, or last year's memory drifts out of date faster than the storage tier it describes.
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Check jurisdiction alongside encryption if the threat model is legal, not criminal. Proton and Tresorit both pair zero-knowledge encryption with Swiss hosting specifically because a stronger legal environment plus a mathematical guarantee is a stronger combination than either alone.
Red Flags to Watch For
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A provider that calls itself "encrypted" without saying whether that means end-to-end (zero-knowledge) or only at rest. The difference is whether the provider itself can read your files.
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No recovery phrase offered at signup for a zero-knowledge account. Without one, a forgotten password is permanent data loss with no workaround, and a provider that does not warn you about this upfront is setting up a support complaint later.
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A vendor that will not name its encryption algorithm or publish an independent audit. Icedrive names Twofish, Internxt documents post-quantum cryptography, and Proton and Tresorit both publish audits; a vague "military-grade encryption" claim with nothing to verify is a marketing phrase, not a spec.
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Pricing that only shows the discounted first-year rate. Icedrive's Pro plan runs $99/yr on annual billing versus $9.99/mo on monthly billing (about $120/yr), so a rate quoted without the billing cycle attached is easy to misread.
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The Bottom Line
Proton Drive for most buyers who want zero-knowledge encryption on the whole account by default, with a real 5GB free tier to test the model first; confirm Drive Plus's current USD price directly on proton.me, since the pricing page renders it client-side. Sync.com when the priority is a Dropbox-like sync experience with encryption already on, starting at a confirmed $3.50/mo for 150GB on annual billing.
Tresorit for regulated teams that need encrypted sharing controls, Swiss and EU hosting, and the backing of a large parent company; ask for current personal-plan pricing directly before signing up. Icedrive for a confirmed annual price on this list at 2TB (see the comparison table), with a named encryption cipher instead of a vague claim.
Internxt for open-source clients and post-quantum cryptography specifically. pCloud and Koofr both fit a buyer who only needs zero-knowledge on a subset of files, since their base storage is encrypted at rest, not end-to-end, until the Crypto or Vault add-on is switched on. MEGA for the largest free tier among zero-knowledge providers, with a patched and independently audited cryptography history worth weighing alongside the other picks.
Cite this: Toolradar, "Best Encrypted Cloud Storage in 2026," September 2026. Prices checked on vendor pages in September 2026. No paid placement. Compared against the 33 cloud storage tools we track.
Frequently Asked Questions
What is the most secure encrypted cloud storage in 2026?
Proton Drive and Tresorit are the two strongest picks for default, whole-account zero-knowledge encryption backed by published audits. Proton Drive adds Swiss hosting and a real 5GB free tier, though its exact USD entry price should be confirmed directly on proton.me since the pricing page did not return a confirmed figure during this review; Tresorit adds encrypted sharing controls built for teams and Swiss and EU hosting, though its personal-plan price is worth confirming directly on tresorit.com before signing up.
How much does encrypted cloud storage cost in 2026?
As of September 25, 2026, Sync.com's confirmed entry price starts at $3.50/mo for 150GB on annual billing, and Icedrive's Pro plan is a confirmed $99/yr for 2TB; see the comparison table above for the exact number on each plan. Proton Drive, pCloud, and Internxt render their USD prices client-side and did not return a confirmed figure to our region, so check each directly, alongside Tresorit and MEGA. Koofr publishes prices only in EUR.
Is there a free encrypted cloud storage option?
Yes. Proton Free ships 5GB with the same zero-knowledge encryption as Proton's paid tiers, Koofr's free plan runs 10GB with limited access to its Vault add-on, Sync.com's free tier is 5GB (with extra storage available through its referral program), and Internxt's free tier is 1GB. All four apply real encryption on the free plan, not a stripped-down version of it.
What is the difference between zero-knowledge encryption and encryption at rest?
Zero-knowledge (end-to-end) encryption locks a file on your device before upload, so only you hold the key and the provider cannot read it even if compelled to. Encryption at rest locks the file on the provider's server with a key the provider controls, which protects against a stolen hard drive but not against the provider itself, a legal order, or a breach of its own key store. Proton Drive, Sync.com, Tresorit, Icedrive, and Internxt are zero-knowledge by default; pCloud and Koofr encrypt at rest by default and sell zero-knowledge as an add-on folder.
Proton Drive vs Sync.com: which is the better encrypted cloud storage?
Proton Drive fits a buyer who wants the encryption bundled with a wider privacy suite: Mail, VPN, Calendar, and Pass are all available on the higher Proton tiers, and Swiss hosting backs the legal side of the pitch. Sync.com fits a buyer who wants encrypted storage that feels the most like Dropbox day to day, without needing or wanting the rest of a privacy suite bundled in. Both are zero-knowledge by default with no add-on required.
Is pCloud's encryption actually zero-knowledge?
Only inside the Crypto folder, which costs extra on top of a base plan (confirm the current add-on price directly on pcloud.com). Files stored anywhere else in a pCloud account are encrypted at rest with keys pCloud controls, not end-to-end. A buyer who wants zero-knowledge coverage on the whole account, not just files they remember to move into the Crypto folder, should compare Proton Drive or Sync.com instead.
Is MEGA's encryption still trustworthy after the 2022 vulnerability report?
MEGA patched the weakness cryptographers flagged in 2022, and a later independent audit found its core zero-knowledge model sound rather than broken in practice. That is a materially different risk than an unpatched or never-audited system, but a buyer with a high-stakes threat model may still prefer a provider like Proton or Tresorit with a cleaner public track record and no comparable finding on record.
Cite this page: Toolradar, "Best Encrypted Cloud Storage in 2026", updated September 2026, https://toolradar.com/guides/best-encrypted-cloud-storage