We detected 5,861 companies using Protonmail and 251 customers with upcoming renewal in the next 3 months. The most common industry is Retail (15%) and the most common company size is 2-10 employees (58%). We find new customers by monitoring new entries and modifications to company DNS records.
Note: Clearbit →
The count of new companies shown here may differ from the total in the table above. This is intentional. We apply a consistent baseline to ensure month-over-month comparisons are apples-to-apples rather than affected by when data was first collected.
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Market Insights
🏢 Top Industries
Retail581 (15%)
Software Development335 (9%)
Technology, Information and Internet264 (7%)
IT Services and IT Consulting251 (6%)
Financial Services179 (5%)
📏 Company Size Distribution
2-10 employees3367 (58%)
11-50 employees1298 (23%)
51-200 employees508 (9%)
201-500 employees230 (4%)
1 employee employees143 (2%)
👥 What types of companies use Protonmail?
Source: Analysis of Linkedin bios of 5,861 companies that use Protonmail
Company Characteristics
i
Shows how much more likely Protonmail customers are to have each trait compared to all companies. For example, 2.0x means customers are twice as likely to have that characteristic.
Trait
Likelihood
Industry: Blockchain Services
16.1x
Country: Malta
13.9x
Industry: Computer and Network Security
11.2x
Country: Estonia
9.1x
Country: Cyprus
7.9x
Funding Stage: Non equity assistance
7.1x
I noticed that Protonmail users span an extraordinarily wide range of activities, from law firms and cybersecurity companies to wineries, environmental nonprofits, and even yarn manufacturers. What unites them isn't industry but often their approach: these are organizations handling sensitive information (legal practices, investigations firms, financial services), operating in regulated environments (healthcare, pharmaceuticals, education), or serving mission-driven purposes (human rights organizations, environmental groups). Many are professional services firms or B2B software companies working with confidential client data.
These are overwhelmingly small to mid-sized organizations. The employee counts cluster heavily in the 2-50 range, with most appearing to be established businesses rather than early-stage startups. Many mention founding dates from the 1990s, 2000s, or earlier, suggesting mature operations. When funding is listed, it's often modest seed rounds or grants rather than large venture raises. These aren't hypergrowth startups chasing unicorn status but sustainable, often privately held businesses.
🔧 What other technologies do Protonmail customers also use?
Source: Analysis of tech stacks from 5,861 companies that use Protonmail
Commonly Paired Technologies
i
Shows how much more likely Protonmail customers are to use each tool compared to the general population. For example, 287x means customers are 287 times more likely to use that tool.
I noticed that Protonmail users are primarily digital-first, privacy-conscious companies with strong content and SEO operations. The combination of Google Search Console, Ahrefs, and GitBook appearing so frequently tells me these are companies that treat organic content as a primary growth channel. They're building knowledge bases, optimizing for search, and measuring their visibility carefully.
The pairing of GitBook with Protonmail is particularly revealing. GitBook appears 23 times more often than average, suggesting these companies are creating extensive documentation, likely for developer tools or technical products. When I see this combined with Ahrefs (nearly 15 times more likely), it points to companies that understand content as product marketing. They're not just writing docs, they're optimizing them for discovery. The Cloudflare correlation reinforces this picture of technically sophisticated teams who care about performance and security at the infrastructure level.
What surprised me was seeing Shopify appear 3.4 times more often. This suggests a meaningful segment of e-commerce companies, probably selling digital products or services where privacy positioning matters to their customers. The ChatGPT for Teams presence indicates these are modern, remote-friendly companies adopting AI tools early.
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We detected 5,861 companies using Protonmail and 251 customers with upcoming renewal in the next 3 months. The most common industry is Retail (15%) and the most common company size is 2-10 employees (58%). We find new customers by monitoring new entries and modifications to company DNS records.
Note: Clearbit →
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