# Do coding agents recommend Amazon SES?

> Amazon SES was chosen in 12% of 208 judged email sending sessions, ranking fourth. Measured with Claude Code, Codex and Cursor.

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

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> Amazon SES was chosen in 12% of 208 judged email sending sessions, ranking fourth. It was also raised as a candidate in 61 further sessions without being chosen.

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

## The numbers

| | |
| --- | --- |
| Category | Email sending |
| Sessions in the category | 208 |
| Sessions where Amazon SES was chosen | 24 |
| Install share | 12% |
| Rank in category | 4 of 6 |
| Codebases it won in | 3 |
| Raised as a candidate, not chosen | 61 |
| Chosen when considered | 28% |
| Site | aws.amazon.com |

## By agent

The three agents land within 7 points of each other on Amazon SES, which is closer than most products in this experiment manage.

| Agent | Sessions | Chose Amazon SES | Share |
| --- | --- | --- | --- |
| Claude Code | 65 | 5 | 8% |
| Codex | 71 | 11 | 15% |
| Cursor | 72 | 8 | 11% |

## By who was asking

Amazon SES does much better with one kind of buyer than another. It won 48% of sessions asked as enterprise team and 2% of those asked as senior engineer.

| Who is asking | Sessions | Chose Amazon SES | Share |
| --- | --- | --- | --- |
| Senior engineer | 164 | 3 | 2% |
| Enterprise team | 44 | 21 | 48% |

## What Amazon SES was up against

The full ranking in email sending, from the same sessions:

| # | Product | Runs won | Share |
| --- | --- | --- | --- |
| 1 | Resend | 74 | 36% |
| 2 | Postmark | 57 | 27% |
| 3 | Azure Communication Services Email | 29 | 14% |
| 4 | Amazon SES **(this page)** | 24 | 12% |
| 5 | SendGrid | 23 | 11% |
| 6 | Generic SMTP | 1 | 0% |

## What this means

Amazon SES was raised in 61 sessions and chosen in 24. That ratio is balanced enough that the ceiling is presence rather than integration: the product converts reasonably when it is on the table, and it is not on the table often enough.

## Where these numbers come from

The 208 sessions in email sending 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 email sending run can be replayed on [the board](/leaderboards/mail).

If you work on Amazon SES: 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 Amazon SES?

Yes. Amazon SES was chosen in 24 of the 208 judged sessions in email sending, a 12% install share, ranking fourth in its category.

### Does Claude Code recommend Amazon SES?

In 5 of the 65 sessions in email sending run with Claude Code, which is 8%.

### Do different coding agents treat Amazon SES differently?

Not much. The three agents chose it at similar rates, between 8% and 15% of their runs.

### 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 Amazon SES considered but not chosen?

It was raised as a candidate in 61 sessions without being chosen, and chosen in 24. That is a 28% conversion from considered to chosen.

## Read next

- [How to get picked for email sending by coding agents](https://armature.tech/library/mail-coding-agents-playbook) (Markdown: https://armature.tech/library/mail-coding-agents-playbook.md)
- [Do coding agents recommend Resend?](https://armature.tech/library/do-coding-agents-recommend-resend) (Markdown: https://armature.tech/library/do-coding-agents-recommend-resend.md)
- [Do coding agents recommend Postmark?](https://armature.tech/library/do-coding-agents-recommend-postmark) (Markdown: https://armature.tech/library/do-coding-agents-recommend-postmark.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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