ProtonSecurity for small business — Proton fits small businesses that handle sensitive client information,…

Pricing

Overview

Proton started in 2014 when scientists at CERN built a privacy-first alternative to Google and Microsoft. Today, over 100 million users and 100,000 businesses trust it. The free plan includes encrypted email, calendar, cloud storage, and VPN access with no ads and no data selling. The Unlimited plan at $9.99 per month adds 500 GB of storage, a full-featured VPN with 15,000 servers across 120 countries, an encrypted password manager, and dark web monitoring. All data stays under Swiss privacy law, and all apps are open source and independently audited. Proton also includes an Easy Switch tool that imports your existing email from Google or Outlook in a few clicks. For a small business owner who handles client data, financial records, or sensitive communications, Proton delivers enterprise-grade security without requiring a technical team to manage it.

Features

• End-to-end encrypted email with support for custom domains
• 500 GB encrypted cloud storage with document and spreadsheet editing
• VPN with 15,000 servers in 120 countries and 10 simultaneous connections
• Encrypted password manager with 2FA authenticator built in
• Dark web monitoring that alerts you when your email appears in a data breach

Best for

Proton fits small businesses that handle sensitive client information, such as legal, financial, medical, or consulting firms, and want one affordable subscription to replace Google Workspace or Microsoft 365 with a privacy-first alternative. It also works well for solo operators and small teams who want professional custom-domain email without paying enterprise prices.

Frequently asked questions

What is Proton?

Proton gives your business end-to-end encrypted email, file storage, VPN, and password management under one account starting at $0. Proton started in 2014 when scientists at CERN built a privacy-first alternative to Google and Microsoft. Today, over 100 million users and 100,000 businesses trust it. The free plan includes encrypted email, calendar, cloud storage, and VPN access with no ads and no data selling. The Unlimited plan at $9.99 per month adds 500 GB of storage, a full-featured VPN with 15,000 servers across 120…

Who is Proton best for?

Proton fits small businesses that handle sensitive client information, such as legal, financial, medical, or consulting firms, and want one affordable subscription to replace Google Workspace or Microsoft 365 with a privacy-first alternative. It also works well for solo operators and small teams who want professional custom-domain email without paying enterprise prices.

Why does AIStackForSMB rate Proton 8/10 for SMBs?

Proton delivers strong privacy protection, a broad feature set, and a genuinely usable free tier, but the single-user pricing model and 25 MB attachment cap create real friction for growing teams.

How does pricing work for Proton?

Offers a free tier or free trial. Free: $0/month. Mail Plus: $3.99/month (yearly) or $4.99/month (monthly), billed at $47.88 every 12 months. Unlimited: $9.99/month (yearly) or $12.99/month (monthly), billed at $119.88 every 12 months. Tiered subscription, billed monthly or annually. Free tier available permanently. Individual paid tiers: Mail Plus and Unlimited. Family and Business plans also offered but pricing requires visiting separate plan pages. Annual billing available with discounts (20% off Mail Plus, 23% off Unlimited vs monthly). Subscriptions renew automatically. Upgrades receive prorated credit. Accepted payments: Visa, Mastercard, American Express, PayPal, Proton gift cards, credits, cash, bank transfers, or Bitcoin. iOS purchases may carry a surcharge for Apple in-app fees.

What category is Proton in?

Proton is grouped under Security on AIStackForSMB. Browse more tools in that category on our site under /categories/security.