# Do coding agents recommend Auth0?

> Auth0 was chosen in 23% of 201 judged authentication sessions, ranking second. Measured with Claude Code, Codex and Cursor.

Source: https://armature.tech/library/do-coding-agents-recommend-auth0
Published: 2026-09-03
Publisher: Armature, Inc. (https://armature.tech)

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> Auth0 was chosen in 23% of 201 judged authentication sessions, ranking second. It was also raised as a candidate in 120 further sessions without being chosen.

This page reports what happened when Claude Code, Codex and Cursor had to solve a problem in authentication inside a realistic codebase. Not what a chat assistant says about Auth0. What an agent actually installed.

## The numbers

| | |
| --- | --- |
| Category | Authentication |
| Sessions in the category | 201 |
| Sessions where Auth0 was chosen | 46 |
| Install share | 23% |
| Rank in category | 2 of 17 |
| Codebases it won in | 10 |
| Raised as a candidate, not chosen | 120 |
| Chosen when considered | 28% |
| Site | auth0.com |

## By agent

The three agents land within 12 points of each other on Auth0, which is closer than most products in this experiment manage.

| Agent | Sessions | Chose Auth0 | Share |
| --- | --- | --- | --- |
| Claude Code | 65 | 11 | 17% |
| Codex | 68 | 20 | 29% |
| Cursor | 68 | 15 | 22% |

## By who was asking

Auth0 does much better with one kind of buyer than another. It won 38% of sessions asked as senior engineer and 0% of those asked as vibe coder.

| Who is asking | Sessions | Chose Auth0 | Share |
| --- | --- | --- | --- |
| Vibe coder | 26 | 0 | 0% |
| Junior developer | 62 | 17 | 27% |
| Senior engineer | 69 | 26 | 38% |
| Enterprise team | 44 | 3 | 7% |

## What Auth0 was up against

The full ranking in authentication, from the same sessions:

| # | Product | Runs won | Share |
| --- | --- | --- | --- |
| 1 | WorkOS AuthKit | 53 | 26% |
| 2 | Auth0 **(this page)** | 46 | 23% |
| 3 | Microsoft Entra ID | 21 | 10% |
| 4 | Built in-house (no product adopted) | 21 | 10% |
| 5 | Clerk | 20 | 10% |
| 6 | Better Auth | 8 | 4% |
| 7 | Keycloak | 7 | 3% |
| 8 | Google Identity | 3 | 1% |

## What this means

A solid second or third position in a category means the agent is genuinely choosing rather than reaching automatically. That is a winnable position, because the inputs it uses can be changed.

The fastest gains are usually in the sessions that were nearly won: read them, find the step where the agent moved on, and fix that step.

## Where these numbers come from

The 201 sessions in authentication are part of a published set of 5,292, run with real coding agents inside realistic codebases and judged blind. The full method is on one page: [how we measured this](/library/how-we-measured-this).

Every authentication run can be replayed on [the board](/leaderboards/auth).

If you work on Auth0: the judge recorded a reason for every session where it was raised and passed over. Those reasons are in the transcripts.

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## Common questions

### Do coding agents recommend Auth0?

Yes. Auth0 was chosen in 46 of the 201 judged sessions in authentication, a 23% install share, ranking second in its category.

### Does Claude Code recommend Auth0?

In 11 of the 65 sessions in authentication run with Claude Code, which is 17%.

### Do different coding agents treat Auth0 differently?

Yes, and by a wide margin. Codex chose it in 29% of its runs and Claude Code in 17%.

### How was this measured?

Real coding agents at pinned versions were run in sandboxes inside 51 realistic codebases and asked to solve real tasks. A simulated project owner approved or questioned each recommendation before any code was written, and a judge from a model family that builds none of the agents read every session blind.

### How often is Auth0 considered but not chosen?

It was raised as a candidate in 120 sessions without being chosen, and chosen in 46. That is a 28% conversion from considered to chosen.

## Read next

- [How to get picked for authentication by coding agents](https://armature.tech/library/auth-coding-agents-playbook) (Markdown: https://armature.tech/library/auth-coding-agents-playbook.md)
- [Do coding agents recommend WorkOS AuthKit?](https://armature.tech/library/do-coding-agents-recommend-workos-authkit) (Markdown: https://armature.tech/library/do-coding-agents-recommend-workos-authkit.md)
- [Do coding agents recommend Microsoft Entra ID?](https://armature.tech/library/do-coding-agents-recommend-microsoft-entra-id) (Markdown: https://armature.tech/library/do-coding-agents-recommend-microsoft-entra-id.md)
- [Do Claude Code, Codex and Cursor pick the same tools?](https://armature.tech/library/do-claude-code-and-codex-agree) (Markdown: https://armature.tech/library/do-claude-code-and-codex-agree.md)

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