Atheos

Lightweight open-source web-based IDE that runs anywhere

About Atheos

Atheos is a web-based IDE framework, continued from Codiad, that runs on your own server with a small footprint and minimal requirements: Apache and PHP, with no database. It supports more than forty languages, multiple users, real-time collaborative editing, split-screen editing, smart autocomplete, error checking, plugins, and over twenty syntax themes. It suits developers who want a fast, self-hosted coding environment accessible from any browser.

Atheos website preview

Live preview of atheos.io via the WordPress mShots service — it can take a few seconds to generate on a first visit.

Atheos: strengths & things to check

Strengths

Completely free to use — this directory lists no paid plan for it.
Covers ide, code editor, self hosted, open source — see the focus areas listed in its key facts.
Has 6 close alternatives in the same category on this page, so switching or comparing is easy.

Things to check

Free tools can change their model or shut down — avoid locking critical work into it without an export path.
Current plan prices are not listed here (they change too often to print reliably) — confirm the exact price on the official site.
It is one of 1164 tools in the Developer Tools category here — compare it against the alternatives below before you commit.

Derived from this listing's own data (pricing model, focus areas and category) — not a hands-on review score.

Atheos pricing

Pricing model	Free — listed in this directory as a free tool, with no paid plan required to use it.
Free access	Yes — fully free
Current plan prices	Listed on the official site — prices change, so this directory links out instead of printing a number that may already be stale.
Official site	atheos.io

Atheos key facts

Category: Developer Tools
Pricing: Free — listed in this directory as a free tool, with no paid plan required to use it.
Focus areas: ide, code editor, self hosted, open source
Official site: atheos.io

Atheos FAQ

How much does Atheos cost?

Free — listed in this directory as a free tool, with no paid plan required to use it. Current plans and prices are listed on the official site (atheos.io).

What is Atheos used for?

Lightweight open-source web-based IDE that runs anywhere Its focus areas in the Developer Tools category: ide, code editor, self hosted, open source.

Where can I try Atheos?

On its official site, atheos.io — the Visit Official Site button above goes straight there.

Atheos vs alternatives

	Atheos	Visual Studio Code	Anubis	Apache NetBeans
Pricing	Free — listed in this directory as a free tool, with no paid plan required to use it.	Free — listed in this directory as a free tool, with no paid plan required to use it.	Free — listed in this directory as a free tool, with no paid plan required to use it.	Free — listed in this directory as a free tool, with no paid plan required to use it.
Focus areas	ide, code editor, self hosted, open source	code editor, ide, programming	bot protection, security, self hosted, open source	ide, java, open source
Official site	atheos.io	code.visualstudio.com	anubis.techaro.lol	netbeans.apache.org
Directory status	Listed	Featured listing	Listed	Listed

Side-by-side from each listing's own directory data. Full alternative cards are below.

About the Developer Tools category

Editors, platforms, and services developers rely on to build and ship software. The Developer Tools category on Tools Hub currently lists 1164 tools. Alongside Atheos, it includes BunkerWeb, Together AI, Bludit, Fess.

FreeDeveloper Toolsidecode-editorself-hostedopen-source

Alternatives to Atheos

Tools in the same Developer Tools category that share focus areas with Atheos — worth comparing before you commit:

Developer Tools

Visual Studio Code

The world's most popular free code editor.

Freecode-editorideprogramming

Developer Tools

Anubis

Web AI firewall that protects sites from scraper bots

Freebot-protectionsecurityself-hostedopen-source

Developer Tools

Apache NetBeans

Full IDE for Java and more, from Apache

Freeidejavaopen-source

Developer Tools

BunkerWeb

Open-source web application firewall that protects web services

Freemiumwafsecurityopen-sourceself-hosted

Developer Tools

cgit

A hyperfast web frontend for Git repositories written in C

Freegitsource-codeopen-sourceself-hosted

Developer Tools

Cockpit

Self-hosted, API-first headless CMS with an open-source MIT core

Freeheadless-cmsapiself-hostedopen-source

More in Developer Tools

Comparing tools in the Developer Tools category? These related listings are worth a look: BunkerWeb — Open-source web application firewall that protects web services; Together AI — The AI native cloud for inference, training and GPU compute; Bludit — Flat-file CMS to build a site or blog in seconds.

Developer Tools

BunkerWeb

Open-source web application firewall that protects web services

Freemiumwafsecurityopen-sourceself-hosted