Proton Revenue: The ~$100M Number Built on $2.5M and Given to a Foundation

Quick answer (2025): Proton, the Swiss privacy company behind Proton Mail and Proton VPN (not Proton Holdings, the Malaysian carmaker), is privately held and does not publish exact revenue. Independent trackers estimate its annual figure at roughly $97.5M to $105M for 2024 to 2025 (GetLatka, ZoomInfo), up from about $70M ARR in 2022 and $0 at launch in 2014. What is not an estimate: Proton has over 100 million accounts (February 2024), around 500 employees (2025), and has raised only about $2.5M of outside money in its entire history, all of it in 2014 and 2015. In June 2024 its founders handed majority control to the non-profit Proton Foundation, and Proton says it has taken no venture capital since and has not raised prices in 10 years.

Two companies, one search box

"Proton revenue" is a genuinely confusing query, because it returns two unrelated companies. One is Proton Holdings, the Malaysian automaker part-owned by Geely, with revenue measured in billions of ringgit. This piece is about the other one: Proton AG, the Geneva-based maker of Proton Mail, Proton VPN, Proton Drive, Proton Calendar, and Proton Pass. When the question comes up in a privacy or SaaS context, it is almost always the encrypted-email company people mean, and it is the one with the unusual money story worth writing down.

Why Proton's revenue is an estimate, not a disclosure

Proton AG is a private Swiss company. It files no public income statement, runs no ads, and takes almost all of its money directly from people who pay for its plans. In its own words, it derives "almost all of our revenues from selling services directly to users in a profitable way" (Proton, February 2024). There is no S-1 to read and no ad line to model, so the public revenue figures you see are third-party estimates built from headcount, pricing, and traffic.

Those estimates cluster tightly, which is a good sign. GetLatka lists Proton at about $97.5M for 2024 (down from a figure it previously carried at $102.3M), and ZoomInfo lists roughly $105M (ZoomInfo). Both bracket the same number: a business somewhere around $100M in annual revenue heading into 2025. Treat the exact digit as an estimate and the order of magnitude as solid.

Proton revenue by year: a sourced ledger

Here is every figure with a name and a date attached, tagged by whether Proton stated it or a third party estimated it.

The shape is a slow, decade-long climb, not a hockey stick: roughly $0 in 2014, about $70M by 2022, and near $100M by 2024. For a company with 100 million accounts, that is a deliberately modest revenue-per-account, and it is the direct result of a pricing philosophy Proton has barely touched in ten years.

The $2.5M that built a $100M business

The funding number is where Proton stops looking like a normal SaaS company. It is tempting to call Proton "bootstrapped," and several trackers do, but the honest version is more interesting than a clean bootstrap.

Proton launched in 2014 out of CERN, funded first by a crowdfunding campaign that pulled in over $550,000 from more than 10,000 backers. In March 2015 it raised a single institutional round: $2M from Charles River Ventures (CRV) and FONGIT, a Geneva non-profit tech foundation (Proton, March 2015). That is essentially the whole external-funding story. Add the crowdfunding to the round and Proton took on the order of $2.5M, ever, and then never went back to the venture market. In March 2021, CRV exited by transferring its shares to FONGIT rather than to a later-stage fund (Wikipedia), which quietly removed the one traditional VC from the cap table.

So the precise, defensible claim is not "Proton never raised a dollar." It is that Proton raised about $2.5M once, a decade ago, and built a roughly $100M-revenue business on user subscriptions from there. In 2026 terms, $2.5M is smaller than a single pre-seed round for an unlaunched AI wrapper. Proton turned it into 100 million accounts.

Who owns Proton now

In June 2024, Proton's founders did the thing almost no growth-stage tech founder does: they gave the company away. Andy Yen and his co-founders endowed the non-profit Proton Foundation with a donation of their shares, making the foundation the controlling shareholder of the for-profit Proton AG (Proton, TechCrunch). The foundation's board of trustees includes Yen, web inventor Sir Tim Berners-Lee, and Dingchao Lu. Proton AG keeps operating as a normal profitable company; the difference is that no investor, and no future acquirer, can override the mission, because the entity that controls the shares is legally bound to it.

That structure is why the revenue trajectory looks the way it does. A VC-owned Proton would have faced relentless pressure toward the only model that returns a fund at email scale: advertising, or an exit to a company that runs ads. A foundation-owned Proton has no exit to optimize for, which is exactly what lets it keep charging users a price it has not raised in ten years and still route millions back out (Proton reports distributing over $2.7M to aligned organizations).

What operators can take from the Proton model

The lesson is not "give your company to a foundation," and it is definitely not "refuse all funding." It is narrower and more useful than either.

• Your funding source writes your pricing power. Proton can hold prices flat for a decade because no investor needs a markup to clear a return. If you raise on aggressive terms, expect the opposite pressure, and price accordingly before the board does it for you.
• A tiny raise is a strategy, not a limitation. $2.5M once, then user revenue, is a genuine moat: it is why Proton never had to bolt on ads. But copy the mechanism, not the myth. It worked because Proton had a decade-long horizon and a rare macro tailwind (post-Snowden privacy demand), not because small capital is magic.
• Count accounts and price, not press-release ARR. Proton discloses accounts and pricing and lets others estimate revenue, which is the honest way to run a subscription narrative. Revenue is a lagging output of two things you control directly: how many people pay, and how much each one pays. The same discipline is what forces a smaller SaaS to finally charge for value when it kills a free plan.

None of this resolves "proton revenue" to a single clean figure, and that is the honest takeaway. For a private, user-funded, foundation-owned company, the public numbers are educated estimates in a tight band around $100M. The hard facts are the ones Proton actually confirms: 100 million accounts, about 500 employees, roughly $2.5M ever raised, and a price that has not moved in ten years.

This is an editorial estimate assembled from public sources, not a company disclosure. Proton AG does not publish exact revenue; figures marked "estimate" above are third-party approximations and are labeled as such.

Keep reading

• Ghost revenue: the $10M ARR non-profit publishing in public: the other privacy-adjacent company that chose a non-profit structure and still reports real numbers.
• Zoho revenue: the $1.4B number built on zero VC: what "no venture capital" looks like at more than ten times Proton's scale.
• The month I killed my free plan at $16K MRR: a founder diary on the pricing discipline the Proton model runs on.