# Outbox vs Stacktree: publishing HTML from AI agents

> Stacktree and Outbox both publish your agents' HTML to private URLs. Outbox adds a library with folders, versions with diff, comments, daily documents and a public gallery.

Stacktree and Outbox solve the same first step: your agent publishes HTML and gets a URL back. The difference is what happens next: how everything your agents publish gets organized, versioned, reviewed and shared.

## Key differences

| What we compare | Outbox | Stacktree |
| --- | --- | --- |
| Publish from agents | API, CLI and MCP | MCP, CLI and API |
| Private by default | Yes | Yes |
| Link protection | Passphrase, expiration and revocation | Passcode and email-domain gating |
| Library with folders and tags | Yes, with search and API keys scoped to a folder | Client spaces on higher tiers |
| Versions | Yes, with diff, squash and rollback | Replace in place at the same URL |
| Comments and suggestions | Yes | No |
| Public gallery and profile | Yes, opt-in per page | No |
| Entry paid plan | $5/mo (Pro) | $19/mo (Solo) |

Stacktree details checked on 2026-10-01 against their public sources (listed below). If something changed, email us at hello@out-box.dev.

## When Stacktree is the better fit

- You only need to deliver private pages to clients with email-domain gating.

## When Outbox is the better fit

- You want everything your agents publish to build up in an organized library, with history.
- You need comments and suggestions on the pages.
- You want to showcase part of your work on a public profile.

## Sources

- [Stacktree · alternatives and pricing](https://stacktr.ee/alternatives)

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Updated 2026-10-01. HTML version: https://out-box.dev/en/guides/vs/stacktree