Proton Sheets is an end-to-end encrypted online spreadsheet built into Proton Drive, for people and small teams who keep sensitive numbers in spreadsheets. It is free with any Proton Drive account, including the 5 GB Proton Free plan. Paid Drive plans, from $47.88 a year for 200 GB, add storage rather than spreadsheet features.
The bottom line
Free and private for everyday sheets; not yet for heavy analysis.
6.8
Our score
6.8 / 10
Conversion Gems editorial verdict
Free; Drive Plus from $3.99/mo billed yearly
Features5/10
5 - formulas, charts, conditional formatting, validation and co-editing cover the basics; no documented macros.
Value9/10
9 - free with any Proton account, and Drive Plus costs $47.88 a year for 200 GB.
Ease of use9/10
9 - opens in the browser from Proton Drive with a familiar grid; XLSX and CSV import in a few clicks.
Ecosystem4/10
4 - file import and export only; no published API or add-ons for Sheets.
Support6/10
6 - Proton support guides cover getting started and import/export; product is new.
What it really is
The spreadsheet editor built into Proton Drive, with end-to-end encryption and real-time co-editing.
Our take
Proton Sheets earns a place for anyone whose spreadsheets hold sensitive numbers, because it costs nothing on top of a Proton account and encrypts content and metadata. It handles budgets, trackers and shared lists well. It is a first version, though: no documented macros, no API, and a feature set well short of mature spreadsheet apps. Keep exports in XLSX or CSV so you can move later.
Why we rate it
Encrypted spreadsheets with co-editing at no extra cost.
The catch
Basic feature set, no documented macros or API, and 5 GB free storage shared with your files.
Best for
Sensitive budgets and client lists
Proton Mail and Drive users
Small teams sharing trackers
Not good for
Power users relying on macros or add-ons
Large data models and heavy analysis
Friction report
Time to value
Minutes: sign in to Proton Drive and create or import a sheet.
Scale breakpoint
Outgrowing 5 GB free storage or needing functions and automation Sheets lacks.
Walled garden
Low for data (XLSX, CSV, TSV export); high for integrations, with no published API.
Proton Drive plans that include Sheets
Plan
Monthly billing
Yearly billing
Storage and extras
Proton Free
$0
$0
5 GB; Docs and Sheets
Drive Plus
$4.99/mo
$47.88/yr ($3.99/mo)
200 GB; 10-year version recovery
Proton Unlimited
$12.99/mo
$119.88/yr ($9.99/mo)
500 GB; adds Mail, VPN, Calendar, Pass
Proton Duo
$19.99/mo
$179.88/yr ($14.99/mo)
2 TB; up to 2 users
Proton Family
$29.99/mo
$287.88/yr ($23.99/mo)
3 TB; up to 6 users
Drive Professional
$9.99/user/mo
$95.88/user/yr ($7.99/mo)
1 TB per user; team access management
From Proton's pricing page and the plan data it loads, checked 4 October 2026. Regular USD prices; no promotion was active. Paid plans carry a 30-day money-back guarantee.
Frequently Asked Questions
Yes. Proton says anyone with a Proton Drive account can use Sheets for free, and the Proton Free plan includes 5 GB of storage with the document and spreadsheet editor. Paid Drive plans add storage, from $47.88 a year for 200 GB (checked 4 October 2026).
Proton Sheets is Proton's spreadsheet app. It opens XLSX files and exports back to XLSX, CSV or TSV, but it is a lighter web editor rather than a full Excel replacement; no macro support is documented.
It covers everyday work such as formulas, charts, sorting, conditional formatting and real-time co-editing, and it encrypts your data end to end. It is newer and has fewer advanced functions and integrations, so test your own files before switching.
Drive Plus (200 GB) is $4.99 a month or $47.88 a year. Proton Unlimited (500 GB plus Mail, VPN and Pass) is $12.99 a month or $119.88 a year. Drive Professional for teams is $9.99 per user a month or $95.88 per user a year (checked 4 October 2026).
Sign in to Proton Drive on the web at drive.proton.me and create a new spreadsheet, or import an XLSX, CSV or TSV file. Conversion Gems is a review site and does not handle Proton logins.
Proton Sheets alternatives
Other spreadsheet and table tools to compare:
Zoho Sheet: Free online spreadsheet with macros, many chart types, an AI assistant and desktop and mobile apps.
Airtable: Spreadsheet-style database for linking records and building simple team apps.
Baserow: Open-source no-code database you can use in the cloud or host yourself.
