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Atlantic vs Codex:
From prompted code to proven pull request.

Codex generates code from a prompt. Atlantic delivers pull requests that already survived a real browser and a second-model review.

Updated August 2026

Start with $50 free for 7 daysView pricing
Browser QA on every runSecond-model reviewHuman merge always
AtlanticAtlantic

Atlantic

Factory investigates the backlog, writes the change, proves it in a browser, reviews the diff, and opens the pull request.

Backlog to PREvidence included
Codex

Codex

Codex is a coding agent you prompt with a task. You control the request, inspect the result, and decide how the work reaches production.

Assigned taskTeam-owned delivery
Point by point

Same repository. A different finish line.

The difference is not who can write code. It is who chooses the work, proves the result, and owns the path to review.

FeatureAtlanticCodex
Picks the problem from your backlog
Yes, three finders and a judge
No, you prompt it
Browser QA on a booted preview
Every run, up to 40 steps on video
No
Second-model review before the PR
Yes, up to 2 fix cycles
No
Cited docs kept per repository
Yes, lessons carry forward
No
Pay only when a PR lands
Yes, nothing-to-do costs nothing
No, billed for generation

Picks the problem from your backlog

AtlanticYes, three finders and a judge

CodexNo, you prompt it

Browser QA on a booted preview

AtlanticEvery run, up to 40 steps on video

CodexNo

Second-model review before the PR

AtlanticYes, up to 2 fix cycles

CodexNo

Cited docs kept per repository

AtlanticYes, lessons carry forward

CodexNo

Pay only when a PR lands

AtlanticYes, nothing-to-do costs nothing

CodexNo, billed for generation

Browser proof

The change works before you review it.

Factory boots the branch on a real machine, drives the changed surface in a browser, and records the result before the pull request opens.

Up to 40 browser stepsVideo attached
Atlantic Factory run detail showing a completed change, browser QA result, and pull request
Connected backlog

Your existing tools become the work queue.

Linear, Jira, GitHub, Slack, Sentry, and your repository give Factory the context to choose and scope the next issue.

See integrations
Linear
GitHub
Jira
Slack
Sentry
Notion
Human control

Factory opens the pull request. Your team merges.

A separate model reviews the diff, raises blockers and flags, and sends fixes back through the loop. Factory never merges the result.

Up to 2 fix cyclesHuman merge always
Run evidenceReady for human review
Complete
Browser QAVideo attached
Agent reviewFindings resolved
Pull requestWaiting for human
The honest choice

When to choose Codex vs Atlantic

Atlantic

Choose Atlantic

  • You want Factory to choose work from the backlog.
  • You need browser video and a second-model review.
  • You want repository lessons to carry into later runs.

Choose Codex

  • You want to prompt and supervise a coding agent directly.
  • You already own task selection, QA, and code review.
  • You do not need a standing backlog-to-PR pipeline.
Start with $50 free for 7 days
GitHub-scoped accessHuman merge always
FAQ

Questions teams ask before choosing Atlantic

★★★★★ Factory runs end with evidence

One backlog. Reviewed pull requests.

Atlantic investigates, implements, proves, and reviews the change. Your team makes the final call.

Start with $50 free for 7 daysBook a demo