Checkmarx
The Leading Agentic Application Security Platform
Codex by OpenAI
AI that writes code for you
Updated February 2026
| Checkmarx | Codex by OpenAI | |
|---|---|---|
| Rating | 5.0★ | 5.0★ |
| Reviews | 1 | 20 |
| Pros | 0 | 0 |
| FactScore™ | 15.1 | 66.1 |
FactScore™ Comparison
FactScore™ weighs both quality (rating) and popularity (reviews) for a fairer ranking than stars alone.
Pros & Cons
Only in Checkmarx — Pros
No unique pros listedBoth tools — Pros
—Only in Codex by OpenAI — Pros
No unique pros listedOnly in Checkmarx — Cons
—Both tools — Cons
—Only in Codex by OpenAI — Cons
—Details
| Checkmarx | Codex by OpenAI | |
|---|---|---|
| Categories | AI Coding Agents, Vibe Coding Tools, AI Code Testing | AI Coding Agents |
| Platforms | Web | Web |
| Became Popular | November 6, 2025 | August 10, 2021 |
| Website | checkmarx.com | openai.com |
Who Should Pick Which?
Choose Checkmarx if...
- No unique pros listed
Choose Codex by OpenAI if...
- No unique pros listed
With a FactScore™ of 15.1 vs 66.1, Codex by OpenAI leads in community reception. Checkmarx uniquely offers No unique pros listed, while Codex by OpenAI stands out for No unique pros listed.
What Users Say
Checkmarx
Codex by OpenAI
Even with new models around, Codex remains one of the most reliable AI coding assistants—fast, structured, and still very useful.
Still the fastest way to get a working regex or a complex utility function from a single-line comment.
OpenAI Codex has become an essential part of our development workflow. With our AGENTS.md providing project context, Codex understands our monorepo architecture and coding conventions, autonomously...
Related Comparisons
Frequently Asked Questions
Which is better, Checkmarx or Codex by OpenAI?
Based on FactScore™, Codex by OpenAI leads with a score of 66.1 vs 15.1. Codex by OpenAI has a higher rating of 5.0★ compared to 5.0★.
What are the pros of Checkmarx compared to Codex by OpenAI?
Checkmarx uniquely offers: No unique pros listed.
What are the pros of Codex by OpenAI compared to Checkmarx?
Codex by OpenAI uniquely offers: No unique pros listed.
Is Checkmarx better rated than Codex by OpenAI?
Checkmarx is rated 5.0★ from 1 reviews. Codex by OpenAI is rated 5.0★ from 20 reviews.
What is the FactScore™ of Checkmarx and Codex by OpenAI?
FactScore™ weighs rating and review volume together. Checkmarx scores 15.1 and Codex by OpenAI scores 66.1.
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