How They Differ Fundamentally
A proxy routes specific traffic (usually browser) through an intermediary server. A VPN creates an encrypted tunnel for ALL traffic from your device. The proxy is a single-app solution; the VPN is a system-wide solution.
Speed Comparison
Proxies are generally faster because they handle less data and have simpler encryption. VPNs add overhead from encrypting all traffic. However, premium VPNs with optimized servers can be very fast. Free proxies are often slow due to overcrowding.
Security and Encryption
Most proxies do not encrypt your traffic (unless using HTTPS). VPNs encrypt everything. If security matters, VPNs are the clear winner. For basic IP masking without encryption needs, proxies are sufficient.
Privacy Comparison
Both hide your IP from target websites. VPNs provide better privacy because they encrypt DNS queries and prevent ISP snooping. Proxies only hide your IP; your ISP can still see your activity. Some VPN providers have strict no-logs policies.
When to Use Each
Use a proxy for: quick IP changes, accessing blocked content, web scraping, testing from different locations. Use a VPN for: sensitive activities, public Wi-Fi, full-device protection, preventing ISP tracking, and when encryption is important.