freenginx

Overview

freenginx is a free, self-hosted server and proxy for HTTP, mail, and generic TCP/UDP traffic. It suits operators who want a configurable, open-source component and can manage it themselves; its breadth and upgrade model are compelling, while support runs through subscription-based mailing lists.

Key features

For HTTP workloads, freenginx combines static file serving with reverse proxying, caching, load balancing, and fault tolerance. It supports SSL/TLS SNI, HTTP/2, HTTP/3, and WebSockets, plus access controls based on client IP, HTTP Basic authentication, or a subrequest result. These options make it useful for serving and routing web traffic without adding a separate proxy for each role.

It can cache and accelerate connections to FastCGI, uwsgi, SCGI, and memcached servers. For teams running those backends, that integration breadth is a practical advantage; the configuration method is file-based, so it is better suited to operators comfortable managing configuration directly than to readers seeking a managed service.

Beyond HTTP, the mail proxy supports IMAP, POP3, and SMTP authentication methods, along with SSL and STARTTLS/STLS. Generic TCP and UDP proxying adds load balancing, fault tolerance, and client-address access control; TCP also supports SSL and TLS SNI. That makes freenginx a broader choice than a web-only reverse proxy.

The architecture uses one master process and several worker processes, with workers running as an unprivileged user. The project says 10,000 inactive HTTP keep-alive connections use about 2.5M of memory and that it keeps data-copy operations to a minimum. Configuration reloads and executable upgrades can happen without interrupting client servicing, a useful operational feature for services that need to stay available during changes.

Pricing

freenginx costs nothing. Its source code and documentation are distributed under a 2-clause BSD-like license. There is no free trial because the product is free; there are no paid tiers or plan quotas to weigh. That makes it an accessible option for self-hosters, but the cost of running and maintaining the deployment remains with the operator.

Platforms

freenginx is available for Linux, macOS, and Windows, and is self-hosted. Downloads include mainline and stable versions, Windows builds, and source through Mercurial repositories and a GitHub mirror. The mainline release announced on 2026-09-01 is 1.31.4; choosing between stable and mainline lets operators weigh release freshness against their own preference for a stable track.

Who it's for

Choose freenginx if you need self-hosted HTTP serving and proxying alongside mail or generic TCP/UDP proxy roles, and value protocol support, backend integrations, or uninterrupted upgrades. It is less suitable if you expect hosted operations or support outside a mailing-list workflow: posting to the support lists requires subscribing an email address first. Security issues can be reported to [email protected]; the security page says patches are signed with one of the project's PGP public keys.

Pros and cons

• Pros: One free, BSD-like-licensed product covers HTTP, mail, and TCP/UDP proxying, reducing the need to assemble separate components for those roles.
• Pros: HTTP/2, HTTP/3, caching, load balancing, and several backend integrations give operators room to handle varied web traffic.
• Pros: Reloads and executable upgrades can preserve client servicing, which helps avoid planned interruptions during routine changes.
• Cons: Self-hosting and file-based configuration put deployment and operational work on the user.
• Cons: Support depends on mailing lists, and posting requires subscribing first; this may not fit teams that need a different support channel.

Alternatives

For other reverse proxy options, browse Reverse Proxy Software. Choose NGINX if you want the free open-source HTTP server, reverse proxy, content cache, load balancer, TCP/UDP proxy, and mail proxy. Envoy Proxy is another free open-source proxy, installable through Docker, macOS Homebrew, or a static binary.

Choose Traefik Proxy if service auto-discovery or ingress-controller functionality is a priority alongside reverse proxying and load balancing. LocalXpose offers a free tier with two active HTTP/HTTPS tunnels, SSL/TLS encryption, unique subdomains, time limits, and an interstitial warning page; that is a different fit for users seeking tunnels rather than a general-purpose self-hosted proxy.

ngrok has a free tier with one-time included usage, up to three online endpoints, and up to 1GB of data transfer. Pomerium offers a free personal plan capped at 10 users, 10 routes, five policies, and two service accounts. BunkerWeb offers an open-source plan under AGPLv3.

Verdict

freenginx is a strong choice for operators who want a free, self-hosted server spanning HTTP, mail, and TCP/UDP proxying, with broad protocol support and upgrades that need not interrupt service. Choose something else if you need a hosted product or support outside a mailing-list model.