Cloudflare is the default choice for most VPS users. The free tier includes a global cdn with 300+ data centers, shared SSL certificate, DDoS protection, and basic firewall rules. It's easy to set up: just change your nameservers.[reference:0]

Tradeoffs: You're proxying traffic through Cloudflare, which can complicate debugging. Advanced features (WAF, page rules) are limited on free tier.[reference:1]