Open source
Alternatives to Friendly Captcha
12 tools like Friendly Captcha, chosen by what they do. About Friendly Captcha
Open source
mCaptcha
Open source proof-of-work CAPTCHA that does not track users
Network DefenseOpen source PoW CAPTCHAInactive
Freemium
hCaptcha
Privacy-focused CAPTCHA and bot detection for sites and apps
Network DefensePrivacy focused CAPTCHA
Open source
Proton VPN
VPN with a free plan, open source apps and a no-logs audit
Network DefenseSwiss privacy VPN
Open source
NetBird
Open source zero trust network access built on WireGuard
Network DefenseOpen source zero trust network
Paid
Sucuri
Website security service for malware cleanup and firewall
Network DefenseWebsite firewall and cleanup
Open source
Headscale
Self-hosted, open source server for a Tailscale network
Network DefenseSelf hosted Tailscale server
Open source
OWASP Coraza
Go-based open source web application firewall with CRS support
Network DefenseGo web application firewall
Open source
Open source
Pomerium
Identity-aware access proxy for private apps, SSH and Kubernetes
Network DefenseIdentity aware access proxy