21tunnel
The tunnel for AI agents — open-source ngrok alternative
21tunnel launched on August 6, 2026 with 1 votes, #11,494 of 23,274 launches that month.
What it does
Mint a master key once — your AI assistant runs autonomously with scoped, short-lived child keys and instant cascade revoke. Built for Claude Code, Cursor, Aider, Devin. Also a complete open-source ngrok alternative in Rust: HTTP, TCP, SSH and gRPC tunnels, sticky subdomains, custom domains on the free tier, edge auth, live request inspector, team RBAC and audit logs. Self-host the whole stack free forever under MIT and Apache-2.0. No tier-locked security features.
Mint a master key once. Your AI assistant runs autonomously with scoped, short-lived child keys and instant cascade revoke. Built for Claude Code, Cursor, Aider, Devin. Also a full-featured ngrok alternative.
Does a similar job
all alternatives →
ngrok – secure introspectable tunnels to localhost2013 · ngrok.com · ▲66ngrok is developer infrastructure that routes and secures traffic to your apps, APIs, and AI models, wherever they run. Start on localhost, ship to prod.
Portr – open-source ngrok alternative designed for teams2024 · github.com · ▲172Expose local http, tcp or websocket connections to the public internet - amalshaji/portr
- ASA simple self-hosted ngrok alternative2019 · ▲34
This is a proof of concept utility which allows you to expose local services to the internet at large: https://github.com/skx/tunneller In short it is a simple ngrok alternative, which you can self-host. Because it is a proof of concept it hasn't been tested extensively, but it seems like it will solve my immediate-needs. Of course it needs test, and structure added. But feedback can't hurt :)
OpenBerthApr 2026 · openberth.io · ▲84Deploy AI-generated apps to your own server with one command. Open source, sandboxed, automatic HTTPS. Built for non-engineers.
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