Squid review

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Squid is open-source, self-hosted proxy caching software for organizations managing web traffic, web clients, and content delivery environments. It caches and reuses HTTP, HTTPS, FTP, and gopher objects, with support for Linux, Windows, and macOS. Its scope is centered on web-object delivery and proxy acceleration rather than general-purpose application data caching. Network operators, website teams, and organizations that need control over cache placement and routing are the clearest fit.

Its strongest capability is the breadth of its caching architecture. Squid supports memory and disk cache stores, cache restoration from disk after restart, request logging, cache object purging, SSL support, and access control lists. Reverse-proxy acceleration extends the product beyond forward proxy use, while parent, sibling, and hierarchical cache peering support distributed cache designs. Load balancing across cache peers adds another option for handling web traffic across multiple cache nodes. These features make Squid suitable for deployments that need persistent cache data, cache hierarchies, and high availability across supported engines including HTTP, HTTPS, FTP, gopher, ICP, and HTCP.

Squid’s main trade-off is its deployment model. It is self-hosted software rather than a vendor-managed cloud service, so the organization operating it owns the infrastructure, configuration, access policies, logging, cache storage, and peer relationships. That model suits teams seeking open-source control and flexible network placement, but it is less suitable for buyers looking for a managed caching service or a broader application-data cache. Choose Squid when web traffic, object caching, proxy acceleration, and hierarchical cache coordination are central requirements; consider another category of product when application-state caching is the primary need.

Squid pros and cons

• Where it wins
  • Supports HTTP, HTTPS, FTP, and gopher object caching
  • Combines in-memory and disk-based cache stores
  • Enables cache peering, load balancing, ACLs, and purging
• Where it doesn't
  • Requires self-hosted deployment rather than a managed cloud service
  • Focuses on web objects instead of general application data
  • Cache administration and configuration remain the operator’s responsibility

Squid fact sheet, pricing and score →

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Last updated 7 Oct 2026 · How we research and update