CodiumAI vs Codium (Open Source): They Are NOT the Same

The confusion explained

If you have searched for “CodiumAI” and found yourself looking at an open-source code editor, or searched for “Codium” the editor and landed on an AI testing tool, you are not alone. This is one of the most common naming confusions in the developer tools space, and it has caused genuine frustration for users of both products.

Here is the short version: CodiumAI and Codium (VSCodium) are completely different products from completely different organizations. They share a word in their names and absolutely nothing else. CodiumAI was a commercial AI startup that has since rebranded to Qodo. Codium - properly known as VSCodium - is a community-maintained open-source build of Visual Studio Code.

This post clears up the confusion once and for all.

What is CodiumAI (now Qodo)?

CodiumAI was an AI-powered code quality company founded in 2022 by Itamar Friedman and Dedy Kredo. The company’s original product was an IDE extension that used AI to generate meaningful unit tests - not placeholder stubs, but tests with real assertions covering edge cases, error paths, and boundary conditions. This test generation capability made CodiumAI popular among developers who wanted to improve test coverage without spending hours writing boilerplate test code.

Over time, CodiumAI expanded well beyond test generation. The company built and open-sourced PR-Agent, an AI code review engine that automatically reviews pull requests on GitHub, GitLab, Bitbucket, and Azure DevOps. The platform grew to include a CLI tool, an enterprise context engine for multi-repo awareness, and a multi-agent review architecture.

In 2024, CodiumAI rebranded to Qodo. The new name reflected both the broader platform vision and the desire to end the naming confusion with VSCodium. Today, Qodo operates at qodo.ai and offers:

• Qodo Merge - AI-powered PR code review across multiple Git platforms
• Qodo Cover - automated test generation in popular frameworks (Jest, pytest, JUnit, Vitest)
• Qodo Gen - the overall AI development experience spanning IDE, CLI, and Git workflows

Qodo was recognized as a Gartner Visionary in AI Code Assistants in 2025 and raised $40 million in Series A funding. The February 2026 Qodo 2.0 release introduced a multi-agent review architecture that achieved the highest overall F1 score (60.1%) in comparative benchmarks across eight AI code review tools.

For more on the rebrand story, see our full post: What Happened to CodiumAI? The Rebrand to Qodo Explained.

What is Codium (VSCodium)?

Codium - more commonly referred to as VSCodium - is something entirely different. It is an open-source, community-maintained binary distribution of Microsoft’s Visual Studio Code editor with all Microsoft telemetry and tracking removed.

Here is the background. Microsoft publishes the VS Code source code under the MIT License on GitHub, which means anyone can build it from source. However, the official VS Code binaries that you download from code.visualstudio.com include Microsoft-specific telemetry, proprietary branding, and connections to Microsoft’s extension marketplace. These additions are not part of the open-source codebase - they are added during Microsoft’s build process.

VSCodium takes the same MIT-licensed source code and compiles it without those Microsoft additions. The result is an editor that looks and functions almost identically to VS Code but does not send telemetry data to Microsoft. This appeals to developers who care about privacy, work in organizations with strict data policies, or simply prefer fully open-source software.

Key characteristics of VSCodium:

• Completely free and open source - MIT License, no paid tiers
• Community maintained - no commercial company behind it
• Uses Open VSX Registry - instead of Microsoft’s Visual Studio Marketplace
• Same editor experience - themes, keybindings, and most extensions work identically
• No AI features - it is a code editor, not an AI tool
• Available since 2018 - predates CodiumAI by four years

VSCodium is not an AI product. It does not review your code, generate tests, or provide any AI-powered assistance. It is simply VS Code without Microsoft’s telemetry.

Key differences at a glance

Dimension	CodiumAI / Qodo	Codium / VSCodium
What it is	AI code review and test generation platform	Open-source code editor (VS Code fork)
Organization	Qodo (commercial company, Israel-based)	Community project (no company)
Founded	2022 (rebranded to Qodo in 2024)	2018
Pricing	Free tier, $30/user/month Teams, custom Enterprise	Completely free
Open source	Core engine (PR-Agent) is open source	Entirely open source (MIT License)
AI features	Yes - PR review, test generation, code analysis	None
Purpose	Review code, generate tests, improve code quality	Edit code with privacy
Relationship to VS Code	Extension that runs inside VS Code (or other IDEs)	Alternative build of VS Code itself
Website	qodo.ai	vscodium.com
Revenue model	SaaS subscriptions	None (community project)

The table makes it clear: these are products in entirely different categories. One is an AI platform. The other is a text editor.

Detailed comparison

Use case and target audience

Qodo targets development teams that want AI assistance with code review and testing. Its users are typically engineering managers, team leads, and developers working on collaborative codebases where pull request quality and test coverage matter. The tool integrates into existing Git workflows and provides value at the team level.

VSCodium targets individual developers who want a VS Code-like editing experience without Microsoft telemetry. Its users are privacy-conscious developers, open-source advocates, and organizations with policies that restrict proprietary telemetry. It is a personal tool choice, not a team infrastructure decision.

Technology

Qodo is built on large language models and uses AI to analyze code diffs, understand context across repositories, and generate human-readable review comments and test code. Its open-source PR-Agent engine supports GitHub, GitLab, Bitbucket, Azure DevOps, CodeCommit, and Gitea.

VSCodium is built on the Electron framework and the Monaco editor - the same foundation as VS Code. It involves no AI technology. The “technology” of VSCodium is essentially a build configuration that strips out Microsoft-specific components from the VS Code source tree.

Licensing and openness

Qodo’s commercial platform is proprietary. However, the core PR-Agent engine is open source on GitHub under the Qodo organization, allowing teams to self-host and inspect the review logic. The commercial tiers add enterprise features like SSO, audit logging, and the multi-repo context engine.

VSCodium is fully open source under the MIT License. Everything about it is transparent - the build scripts, the configuration patches, and the distribution pipeline. There is no proprietary layer.

Can you use both together?

Yes, and this is perhaps the clearest illustration that these products are not competitors. You can run the Qodo extension inside VSCodium just as you would run it inside VS Code. VSCodium is the editor where you write code. Qodo is the AI tool that reviews and tests your code. They operate at different layers of the development stack.

The only practical consideration is that VSCodium uses the Open VSX Registry rather than Microsoft’s Visual Studio Marketplace. If the Qodo extension is available on Open VSX, installation is seamless. If not, you can download the extension as a .vsix file and install it manually. This is a minor inconvenience, not a compatibility issue.

For developers who use Qodo’s PR review features (which run as a GitHub/GitLab bot rather than an IDE extension), the choice of editor is entirely irrelevant. Qodo Merge reviews your pull requests regardless of whether you wrote the code in VS Code, VSCodium, Neovim, IntelliJ, or Notepad.

The rebrand that fixed the confusion

CodiumAI’s decision to rebrand to Qodo in 2024 was driven by two factors, and the naming confusion with VSCodium was explicitly one of them. The CodiumAI team acknowledged that the name overlap was causing real problems:

• Developers searching for VSCodium would land on CodiumAI’s website and get confused
• CodiumAI users would search for support and find VSCodium documentation instead
• Enterprise buyers would ask if CodiumAI was related to the open-source editor
• SEO and brand recognition were muddied by the shared terminology

The Qodo name has no overlap with any existing developer tool. Since the rebrand, the confusion has decreased substantially - though search engines still surface the old CodiumAI name in results, which is why articles like this one remain necessary.

The other reason for the rebrand was that CodiumAI had outgrown its original identity. The company had expanded from a test generation tool into a full AI code quality platform, and the old name was underselling the product. Qodo carries no legacy associations and allows the company to position itself on its own terms.

For the full rebrand story, see: What Happened to CodiumAI? The Rebrand to Qodo Explained.

Alternatives to consider

If you landed on this page looking for an AI code review tool (what CodiumAI/Qodo does), here are the main options:

• Qodo - the current name for CodiumAI. AI code review plus automated test generation. Free tier available, Teams at $30/user/month. See Qodo vs GitHub Copilot and Qodo vs CodeRabbit for detailed comparisons.
• GitHub Copilot - all-in-one AI coding platform with code review as one feature. $10/month individual, $19/user/month Business. Best for teams fully invested in GitHub. See GitHub Copilot alternatives.
• CodeRabbit - dedicated AI code review bot for pull requests. Strong alternative to Qodo with different review philosophy.
• CodeAnt AI - AI code review and code quality platform at $24-40/user/month. Combines automated PR review with code quality analysis, security vulnerability detection, and anti-pattern identification. A mid-range option between free tools and expensive enterprise platforms.

If you landed here looking for a privacy-focused code editor (what VSCodium is), your alternatives include:

• Neovim - terminal-based editor with extensive plugin ecosystem
• Emacs - highly extensible editor with a long history
• VS Code (standard) - if telemetry is not a concern, the official build gives you full marketplace access
• Zed - modern, fast code editor built in Rust with collaborative features

Summary

CodiumAI and Codium (VSCodium) were never the same product, never from the same organization, and never in the same product category. The confusion was always purely a naming coincidence.

CodiumAI was a commercial AI company that built tools for automated code review and test generation. It rebranded to Qodo in 2024, and the naming confusion is now resolved at the brand level. VSCodium is a community-driven open-source build of VS Code that removes Microsoft telemetry, and it continues to operate independently under its original name.

If you want AI to review your pull requests and generate tests, you want Qodo. If you want a telemetry-free code editor, you want VSCodium. And if you want both, you can install the Qodo extension inside VSCodium and use them together.

For more on Qodo and how it compares to other AI tools, see our related posts:

• What Happened to CodiumAI? The Rebrand to Qodo Explained
• Qodo vs GitHub Copilot
• Qodo vs CodeRabbit
• Qodo vs Sourcery
• GitHub Copilot Alternatives
• Best AI Tools for Developers