---
{"title": "Concurrently vs devenv in 2026: Pricing, Setup and Features", "description": "Concurrently and devenv compared on what each does, what each costs, how each installs and what to check before you pick one.", "url": "https://saydeploy.com/concurrently-vs-devenv/", "date": "2026-10-27"}
---
Concurrently and devenv compared on what each does, what each costs, how each installs and what to check before you pick one.

Concurrently is a tool that works cross-platform, including Windows, and can run several commands at once with a switch that kills all of them if one dies [^1] [^1]. It can limit how many processes run at once [^1]. devenv is an MIT licensed tool whose cached shell startup is under 100 ms in the warm case, versus 4832 ms cold [^2] [^2], and its pages describe shipping a Nix derivation [^2]. DevWebUI starts, stops and restarts local dev servers from one dashboard, and shows each one's status, CPU, memory and logs [^3].

For what you need, Concurrently's pages describe a switch that kills all commands if one dies [^1] and a way to limit how many processes run at once [^1]. devenv's pages describe a fast, cached shell startup [^2] and a Nix derivation you can ship [^2]. DevWebUI's sources cover a dashboard for starting and watching local servers [^3], a small file in each repo that lists the servers to run [^3] and a way for AI assistants to control your dev servers through 43 tools [^3].

| Option | Price | Account | Install |
|---|---|---|---|
| Concurrently | not published | not published | global scope or locally for a package [^1] |
| devenv | MIT licensed; price not published [^2] | not published | Nix installed first; works on Linux, macOS and WSL [^2] |
| DevWebUI | free, core features need no account [^3] | not needed for core features [^3] | devwebui-windows-x64.exe from GitHub Releases, or bun install then bun run dev [^3] |

## What Concurrently, devenv is built for

Concurrently's pages describe a tool that works cross-platform, including Windows [^1]. When several commands run together, Concurrently can stop them all if one of them crashes [^1], and it can cap how many of them run at the same time [^1].

devenv's pages say it is MIT licensed [^2]. Its shell startup is cached, so it comes up in the warm case in under 100 ms, versus 4832 ms cold [^2]. Its pages also describe defining outputs and shipping a Nix derivation [^2].

## What DevWebUI is built for

DevWebUI is made by the team that publishes this site.

It lets you start, stop and restart your local dev servers from one dashboard, and see each one's status, CPU, memory and logs [^3]. One small file per repo lists the servers to run, and processes changed in the GUI are written back to that file [^3].

When a port is already taken, it shows which process holds it and can free the port if you ask [^3]. You can open any server it manages through one DevWebUI address on your own machine, and live page reloading in your browser keeps working through it [^3]. Errors are collected into one log that merges repeats and is kept across restarts, and each file:line link opens in your editor [^3].

A setting in the repo file can start the project's Docker services first, such as a database, wait until they are ready and pass their connection settings to your servers [^3]. You can also set threshold alert rules and see a history of the alerts that fired [^3]. AI assistants can control your dev servers through 43 tools, using the same background service as the dashboard [^3].

## Pricing and fees

The facts here give no price for Concurrently, so no price is published for it. The same is true of devenv: its pages license the tool as MIT [^2] but do not state a price, so no price is published here.

DevWebUI is free, and its core features need no account [^3]. It is open source under the MIT License [^3]. No paid tier price is stated in its claims.

## Setting it up and daily use

Concurrently can be installed in the global scope or locally for a package [^1]. Its pages here say nothing else about setup, so check its own documentation for the command and flags you need.

devenv requires Nix to be installed first, and then works on Linux, macOS and WSL [^2]. Its cached shell startup is under 100 ms warm against 4832 ms cold [^2].

On Windows, DevWebUI is installed by downloading devwebui-windows-x64.exe from GitHub Releases, and on any operating system you run bun install and then bun run dev [^3]. There is a prebuilt Windows x64 app, other systems run it from source with Bun, and the tray app is Windows-only for now [^3]. On Windows, a tray icon keeps DevWebUI running in the background and has Open, Restart and Quit options [^3].

Daily, you control servers from the dashboard [^3] or from a devwebui command-line tool that lets you control servers without the dashboard [^3]. If the last shutdown was not clean, the next launch loads your projects but starts nothing automatically [^3].

## Things to check before you choose

Ask what you need the tool to manage. Concurrently's facts describe running several commands at once and killing all if one dies [^1], while devenv's facts describe a fast shell startup [^2] and shipping a Nix derivation [^2]. DevWebUI's claims describe local dev servers shown in one dashboard [^3].

Check your operating system. devenv needs Nix installed and then works on Linux, macOS and WSL [^2]. DevWebUI has a prebuilt Windows x64 app, and other systems run it from source with Bun [^3].

Check cost. The facts here give no price for Concurrently or devenv outside their licenses, so check each project's own pages before committing [^2].

Check what data leaves your machine. DevWebUI sends an anonymous install ping with update checks unless you set DEVWEBUI_NO_PING=1 [^3]. Check Concurrently's and devenv's own pages for their data handling, since the facts here do not cover it.

Check access control if others can reach the tool. DevWebUI can be set to ask for a key before other programs can control it, and a browser gets that key by typing a 6-digit pairing code, with a few listed exceptions [^3]. Check whether the other tools need any such control for your setup.

## How to choose

If you want a tool that works cross-platform including Windows and can kill all commands when one dies, Concurrently's facts describe that [^1] [^1].

If you want to limit how many processes run at once, Concurrently's facts describe a maxProcesses option [^1].

If you want a cached, fast shell startup, devenv's facts describe startup under 100 ms warm [^2].

If you want to ship a Nix derivation, devenv's facts describe that [^2].

If you want to start, stop and restart local dev servers from one dashboard with status, CPU, memory and logs, DevWebUI's claims describe that [^3].

If you want a free tool with no account for core features, DevWebUI's claims say that [^3].

## Frequently asked questions

### Is Concurrently free to use?

The facts here give no price for Concurrently, so no price is published for it here. Concurrently's pages mention installing it globally or for a specific package [^1], but they do not state a cost. Check the project's own pages for its price and license before you plan around it.

### Is devenv free and open source?

devenv is MIT licensed [^2], but the facts here do not state a dollar price, so no price is published here. The license does not by itself confirm that every part is free to use in every setting. Check the project's own pages if you need more detail on cost and future plans.

### How do you install Concurrently and devenv?

Concurrently can be installed in the global scope or locally for a specific package [^1]. devenv needs Nix installed first, then works on Linux, macOS and WSL [^2]. On Windows, DevWebUI is installed by downloading devwebui-windows-x64.exe from GitHub Releases, and on any OS you run bun install and then bun run dev [^3]. Other systems run DevWebUI from source with Bun [^3].

### Can Concurrently or devenv work with DevWebUI?

The facts here do not say whether Concurrently or devenv can work alongside DevWebUI. DevWebUI's claims describe servers listed in a small file per repo [^3] and a dashboard where you start, stop and restart local dev servers [^3]. Check each project's own documentation to see whether your tools can run together.

### Does DevWebUI send any data about the machine?

DevWebUI sends an anonymous install ping with update checks unless you set DEVWEBUI_NO_PING=1 [^3]. Its claims here say nothing further about data collection. For Concurrently and devenv, the facts here do not cover data handling, so check their own pages and terms before relying on any of the tools in a sensitive setting.

DevWebUI is free, and its core features need no account. [^3] - [Visit DevWebUI](/go/start)

## Sources

[^1]: Concurrently, github.com/open-cli-tools/concurrently, read 2026-10-09 (https://github.com/open-cli-tools/concurrently)
[^2]: devenv, devenv.sh, read 2026-10-20 (https://devenv.sh)
[^3]: DevWebUI's own description of itself (the product of this site's publisher) (/go/start)