What are the best free alternatives to Tailscale?

Headscale, Tailcat, Matchbox, doggo, croc. All are reviewed on Stack Gems in the same category (networking tools); 8 free or open source.

Is there an open-source alternative to Tailscale?

Yes: Headscale (BSD-3-Clause), Tailcat (BSD-3-Clause), Matchbox (Apache-2.0), doggo (GPL-3.0).

Alternatives · Networking

Tailscale alternatives (2026)

Tailscale: The easiest way to put your machines on one private network — self-host the control side with headscale if that matters.

Its Catch: By default every node connects to Tailscale’s hosted coordination server, a proprietary service with its own plans and limits.

Below: 8 free or free-tier tools from the same category (networking tools), free and open source first, then the closest match by shared tags. Each keeps its own Catch.

1.HeadscaleBSD-3 self-hosted Tailscale control server
Free / OSS · BSD-3-Clause · 44.8k GitHub stars
VerdictBSD-3 Tailscale-compatible control plane. Self-host; clients stay Tailscale.
CatchControl server only — not a userspace WireGuard client replacement. Not associated with Tailscale Inc as a product. You operate DERP/coordination yourself; MagicDNS/feature parity lags Tailscale SaaS at the edges.
2.TailcatBSD-3 WireGuard+DERP netcat without Tailscale control plane
Free / OSS · BSD-3-Clause · 8.4k GitHub stars
VerdictBSD-3 WireGuard netcat without Tailscale Inc coordination. Bring your own DERP.
CatchCLI/API unstable — no stability promises. Public Tailscale DERP may be rate-limited or revoked; run your own derper for real bandwidth. Not Headscale control plane or full Tailscale VPN. Distinct from Headscale/Netbird.
3.MatchboxMIT/Apache-2.0 Rust/WASM P2P sockets for Bevy + GGRS
Free / OSS · Apache-2.0 · 1.2k GitHub stars
VerdictMIT/Apache-2.0 Rust P2P for Bevy/GGRS. Free forever; you still host signaling.
CatchVs PeerJS, Trystero, and Colyseus: Rust/WASM P2P socket + signaling crates — not a JS-first rooms kit, not serverless Nostr/MQTT discovery, not an authoritative game-room framework. You still run matchbox_server (or your own signaling) so peers can find each other; NAT/TURN still applies. Bevy version pins matter (bevy_matchbox tracks Bevy releases).
4.doggoGPL-3.0 human DNS client — DoH/DoT/DoQ/DNSCrypt + web UI
Free / OSS · GPL-3.0 · 4.5k GitHub stars
VerdictGPL-3.0 DNS CLI. Free forever queries; the Catch is copyleft, not a free DNS product seat.
CatchGPL-3.0 copyleft — fine for a CLI on your laptop; read the license before embedding into proprietary SaaS. Vs dig/nslookup (OS stock) and vs dog (Rust, quieter upstream): doggo is the maintained Go dig-with-DoH lane, not a recursive resolver and not dig dialect-complete. You still pick the upstream resolver.
5.crocMIT secure peer file send — relay + PAKE
Free / OSS · OSS/MIT · 40.6k GitHub stars
VerdictMIT peer file send. Free forever; rclone the remotes, croc the person in the other room.
CatchVs rclone (*rsync for 70+ cloud remotes*): croc is *peer send*, not cloud sync/mount and not a backup vault. Default path uses a public relay (you can self-host). Code phrase is the trust; treat it like a one-time password, not a permanent share link.
6.SubmarineMIT Rust/Tauri SSH & SFTP client — desktop + Android
Free / OSS · OSS/MIT · 451 GitHub stars
VerdictMIT Tauri SSH/SFTP when you want a focused native client — not Navop’s full ops suite; mid-★ devops fill.
CatchVs Navop: Navop is the wider DB/RDP/AI ops suite; Submarine stays on SSH/SFTP done well. Vs Termius-class paid clients: no team vault cloud here — keys and sync are local/self-managed. Mid-★ (~374) kept as clean OSS remote-access fill; confirm Android/desktop release maturity for your workflow.
7.irohRust library that connects devices by public key over QUIC
Free / OSS · Apache-2.0 · 12.8k GitHub stars
VerdictThe building block for local-first or P2P features in a Rust app — plan your own relay before you ship.
CatchRust first: other languages go through the separate iroh-ffi bindings, which trail the core (iroh-ffi v1.1.0, July 2026). The free public relays run by n0 are rate-limited, shared by everyone and come with no uptime guarantee — the project itself says they are for development and testing. For production you either run your own relay or pay for n0's hosted relays (Pro from $19/month, dedicated relays from $199/month per region). It is a connection library, not a VPN: if you just want your machines on one private network, Tailscale or NetBird is the simpler tool.
8.Nginx UIAGPL-3.0 web UI for managing Nginx configs, certs and logs
Free / OSS · AGPL-3.0 · 11.6k GitHub stars
VerdictA handy Nginx admin panel for a small fleet — lock it down before you turn on the MCP side.
CatchIt is a control panel with root-level power over your web server: never expose it to the internet without strong auth, and put it behind a VPN or allowlist. The MCP interface hands an agent the same power, so scope it carefully. AGPL-3.0 matters if you modify it and offer it to others over a network. Much of the community and docs traffic is in Chinese.

FAQ

What are the best free alternatives to Tailscale?: Headscale, Tailcat, Matchbox, doggo, croc. All are reviewed on Stack Gems in the same category (networking tools); 8 free or open source.
What is the catch with Tailscale?: By default every node connects to Tailscale’s hosted coordination server, a proprietary service with its own plans and limits.
Is there an open-source alternative to Tailscale?: Yes: Headscale (BSD-3-Clause), Tailcat (BSD-3-Clause), Matchbox (Apache-2.0), doggo (GPL-3.0).

Tailscale alternatives (2026)

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