
Google Authenticator
Authy
Lastpass
Azure Multi-Factor Authentication
OneLogin
Okta
Ping Identity
Duo Security provides cloud-based two-factor authentication. Duo’s technology can be deployed to protect users, data, and applications from breaches, credential theft, and account takeover.

Claude Code
aider
Cursor
Ghostty
opencode
GitHub Copilot
Zed
Frontier reasoning in the terminal

Which is more popular?
OpenAI Codex CLI might be a bit more popular than Duo Security. We know about 41 links to it since March 2021 and only 33 links to Duo Security.
Website, pricing, platforms and company facts side by side.
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| Website | duo.com | github.com |
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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 Duo Security yet.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
What is DUO Security 2FA and How it Works With Windows Remote Desktop
More videos
OpenAI Codex CLI
More videos
How often each product is chosen within a category, 0–100% relative to the other.


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


Used by WhatsApp and Etsy, Duo Security was designed with modern companies in mind. That means it prioritizes speed. The DuoMobile app, for instance, simplifies multi-factor authentication. Users can merely tap on a...
We have no reviews of OpenAI Codex CLI yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


Take for example a university. Many of them seem to use Duo[1], which is not something you can replace with Google Authenticator or other TOTP app. They require it for students as well as faculty and staff. Is it reasonable for them to... - Source: Hacker News / 3 months ago
The Solution: There are not only one solution to achieve the goal, but this time we choose Cisco Duo as the MFA infrastructure. - Source: dev.to / 8 months ago
Duo.com — Two-factor authentication (2FA) for website or app. Free for ten users, all authentication methods, unlimited, integrations, hardware tokens. - Source: dev.to / over 2 years ago
Codex takes the opposite bet: one product across six surfaces. CLI, IDE extension, Codex Cloud, the ChatGPT app sidebar, mobile (GA May 2026), and a Chrome extension. All of them share your ChatGPT account, your session history, and your... - Source: dev.to / 4 days ago
The second CLI (Codex) records tokens and quota in session files, but the laptop sleeps and moves, so Prometheus can't reliably scrape it. That's exactly the Pushgateway case: a systemd user timer parses the session files every 5 minutes... - Source: dev.to / 30 days ago
Since when? https://learn.chatgpt.com/docs/codex/cli https://github.com/openai/codex Looks like it's still a more-or-less-open-source product called Codex CLI. FWIW, there have been issues with various versions of ChatGPT not knowing... - Source: Hacker News / about 2 months ago
When comparing Duo Security and OpenAI Codex CLI, you can also consider the following products.

Google Authenticator is a multifactor app for mobile devices.
Compare Google Authenticator to Duo Security or OpenAI Codex CLI:

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 Duo Security or OpenAI Codex CLI:

Best rated Two-Factor Authentication smartphone app for consumers, simplest 2fa Rest API for developers and a strong authentication platform for the enterprise.
Compare Authy to Duo Security or OpenAI Codex CLI:

aider is AI pair programming in your terminal
Compare aider to Duo Security or OpenAI Codex CLI:

LastPass is an online password manager and form filler that makes web browsing easier and more secure.
Compare Lastpass to Duo Security or OpenAI Codex CLI:

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