Freemium
hCaptcha
Privacy-focused CAPTCHA and bot detection for sites and apps
Network DefensePrivacy focused CAPTCHA
Alternatives to reCAPTCHA
12 tools like reCAPTCHA, chosen by what they do. About reCAPTCHA
Open source
mCaptcha
Open source proof-of-work CAPTCHA that does not track users
Network DefenseOpen source PoW CAPTCHAInactive
Curated
Friendly Captcha
Invisible, privacy-friendly CAPTCHA that uses proof-of-work
Network DefensePrivacy first CAPTCHA
Open source
ModSecurity
Open source web application firewall engine used with OWASP rules
Network DefenseOpen source WAF engine
Open source
BunkerWeb
Open source reverse proxy WAF that protects web services
Network DefenseOpen source next gen WAF
Open source
Open source
Pomerium
Identity-aware access proxy for private apps, SSH and Kubernetes
Network DefenseIdentity aware access proxy
Open source
NetBird
Open source zero trust network access built on WireGuard
Network DefenseOpen source zero trust network
Freemium
Open source
Proton VPN
VPN with a free plan, open source apps and a no-logs audit
Network DefenseSwiss privacy VPN
Paid
Sucuri
Website security service for malware cleanup and firewall
Network DefenseWebsite firewall and cleanup