Proton VPN's end-of-summer flash sale ends on September 24, so this is your last chance to get your hands on one of the best VPNs for $3 per month. This is the lowest price we've seen Proton VPN this year, and you can see why we're big fans of the privacy-focused provider in our Proton VPN review. Proton VPN | Protect your privacy for $3 per month Save 70%: Tom's Guide readers can get 70% off Proton VPN until September 24. If $3 per month is more than you're willing to spend, but you still want to protect your data with Proton VPN, then you can check out Proton VPN Free. You'll get Proton VPN, Proton Mail, Proton Drive, Proton Pass, Proton Wallet, and Proton Calendar.