
HackerRank
CodeSignal
iMocha
TestGorilla
HackerEarth
DevSkiller
mettl
Codility provides a SaaS platform with advanced validation, security and protection features to evaluate the skills of software engineers.

Claude Code
GitHub Copilot
Cursor
Windsurf Editor
ChatGPT
OpenAI
Claude AI
AI that writes the code for you

Which is more popular?
Based on our record, Codex by OpenAI seems to be a lot more popular than Codility. While we know about 76 links to Codex by OpenAI, we've tracked only 2 mentions of Codility.
Website, pricing, platforms and company facts side by side.
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In their own words, as submitted to SaaSHub.


The Codility platform includes: CodeCheck - Design role-specific remote skills assessments to screen your technical candidates before moving them to the interview stage. CodeLive - Host technical remote or onsite interviews via our shared editor using a range of templates and whiteboards....
No description of Codex by OpenAI yet.
What each product offers, as listed by its team.


Possible disadvantages
Possible disadvantages
An editorial look at what each product does well and who it suits.


No analysis of Codility yet.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
An Introduction to Codility: The Tech Hiring Platform for Engineering Teams
No Codex by OpenAI videos yet. You could help us improve this page by suggesting one.
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using Codility and Codex by OpenAI. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Codility is a platform that helps companies assess the coding skills of developers. They offer a range of online coding tests and assessments that enable employers to evaluate candidates' technical abilities.
OpenAI Codex is a powerful, flexible AI model that translates natural language into functional code. It’s best suited for dev teams building custom AI tools, automations, or internal developer assistants. Moreover,...
Kicking off our list is OpenAI Codex, a powerful AI model that’s capable of generating code based on natural language descriptions. While not a complete platform like Vercel v0, Codex can be integrated into various...
Recommendations tracked on public social media and blogs since March 2021.


- Technical skills: have they got the walk to match the talk? Programming languages on a resume mean little if candidates are unable to demonstrate their hard coding skills. You can test these skills with technical skill tests, such as... - Source: dev.to / over 2 years ago
Codility : Verify and improve coding skills. - Source: dev.to / over 5 years ago
Tools like Claude Code, Codex, and OpenCode have made “writing code” itself much easier. But in real development, the harder problems are different: how to keep the specification in front, how to run multiple changes safely in parallel,... - Source: dev.to / 6 months ago
Coding assistants like Cursor, Windsurf, Claude Code, Gemini CLI, Codex, Aider, OpenCode, JetBrains AI etc. Have been making the news for the last few months. Yet, the choice of tools is a lot harder and limited for some of us than it... - Source: dev.to / 10 months ago
The following segments are specific to GitHub co-pilot but similar concepts apply to other LLM tools such as GPT codex, Claude (which would be similar to Claude skills) and on a limited level, Junie too. We will explore two methods of... - Source: dev.to / about 1 year ago
When comparing Codility and Codex by OpenAI, you can also consider the following products.

HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.
Compare HackerRank to Codility or Codex by OpenAI:

Transform hours of debugging into seconds with a single command. Experience coding at thought-speed with Claude's AI that understands your entire codebase—no more context switching, just breakthrough results.
Compare Claude Code to Codility or Codex by OpenAI:

CodeSignal is the leading assessment platform for technical hiring.
Compare CodeSignal to Codility or Codex by OpenAI:

Your AI pair programmer. With GitHub Copilot, get suggestions for whole lines or entire functions right inside your editor.
Compare GitHub Copilot to Codility or Codex by OpenAI:


The AI-first Code Editor. Build software faster in an editor designed for pair-programming with AI.
Compare Cursor to Codility or Codex by OpenAI: