| Tool | Description | | :--- | :--- | | | An excellent free option. It integrates tunneling with Cloudflare's DNS and automatic HTTPS. The client source code is available under the Apache 2.0 license. | | frp | A comprehensive and popular open-source alternative to ngrok. It supports UDP, has a P2P mode, and uses a custom TCP protocol for multiplexing. | | localtunnel | A popular, simple alternative written in Node.js. It's very easy to use and is a common suggestion for quick and dirty tunneling. | | JPRQ | A free and open-source ngrok alternative written in Python. It allows developers to serve unlimited requests to the local server compared to ngrok's 40 requests/minute limit and can expose multiple ports at the same time. | | Serveo | An online service that is completely free. It requires no installation, as it uses SSH to create tunnels, but it's less reliable for production use. |

: Restricts how many local services you can expose at the same time.

: If you have a small VPS, you can set up your own tunnel for free using standard SSH commands.