Haystack

Haystack is an AI-powered code review tool for pull request workflows. It helps teams triage PRs, surface risky changes, and route reviews using captured decisions, ownership, and context.

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What Haystack does

Haystack is an AI-powered code review product for pull request workflows. Its homepage describes it as the fastest path from pull request to merge, and the product copy focuses on helping teams review changes in logical order while keeping attention on the PRs that actually need human judgment.

The product watches for design decisions, risk policies, and ownership rules that matter in a codebase. It can capture reasoning from coding-agent sessions, flag PRs that appear to reverse those decisions, and guide reviewers toward the right person or the right context before a risky change merges.

Key features

Smart PR inbox

Haystack triages incoming pull requests so teams can focus on the ones that need attention instead of manually checking every change.

Decision-aware review

The product compares PRs against captured decisions, risk policies, and ownership rules, then flags changes that appear to reverse prior choices.

Review routing by ownership

When a PR needs a person, Haystack can hold the merge and point reviewers to the engineer who made the original decision.

Unified AI reviewer view

The pricing page says Haystack aggregates CodeRabbit, Copilot, Greptile, and 10+ AI reviewers into one view, reducing the need to jump between tools.

Merge queue automation

Haystack includes a merge queue that rebases, resolves conflicts, and retries CI automatically.

Context-rich review chat

Reviewers can chat with full coding agent context to trace changes and ask questions in context.

Common use cases

Triage high-volume PR queues
Use Haystack to surface the PRs that need review while routine changes keep moving through the pipeline.
Protect architectural decisions
Use it when a change might undo a previously agreed implementation choice, so the relevant decision maker is looped in before merge.
Automate merge housekeeping
Use the merge queue and automated conflict/CI handling to reduce manual babysitting on straightforward merges.
Consolidate AI review signals
Use the unified reviewer view and chat context when a team already relies on several AI review tools and wants them in one place.
Review agent-generated changes
Use it to give reviewers context from coding-agent sessions, so they can trace why a change was made before approving it.

Pros and Cons

Pros

Focuses review attention on PRs that need human judgment.
Captures and reuses decisions and reasoning from earlier work.
Includes merge-queue automation for rebasing, conflict handling, and CI retries.
Combines multiple AI reviewer tools into one view.
Offers a trial on the Pro plan with no credit card required.

Cons

The public pages do not provide a full integration list or setup guide.
The source does not describe platform support beyond GitHub login on the site.
The pricing page shows an Enterprise option, but detailed limits and compliance specifics are not published in the collected text.

FAQ

How does Haystack fit into PR review workflows?

Haystack is built around pull request review workflows. The source shows it triaging PRs, checking them against team decisions, risk policies, and ownership rules, and routing only the PRs that need human judgment to reviewers.

Does Haystack work with other AI code reviewers?

The source says Haystack aggregates CodeRabbit, Copilot, Greptile, and 10+ AI reviewers into one view. It also offers chat with full coding agent context so reviewers can trace changes and ask questions.

What pricing options does Haystack offer?

The pricing page lists a Pro plan at $30 per person per month, with unlimited AI reviews and agent messages, and an Enterprise plan with custom pricing. Pro includes a 14-day free trial with no credit card required.

Which integrations are supported?

The source does not list a full integration catalog or supported platforms. The homepage and pricing page only show GitHub login and mention AI review tools and coding agents in the workflow.

Who is Haystack for?

Haystack is designed for teams that want PRs routed by policy and context, including decisions, risk rules, and ownership. The homepage and pricing copy emphasize helping reviewers focus on the few PRs that need attention.

Quick Facts

Category: AI code review
Primary workflow: Pull request triage and merge guidance
Pricing: Pro at $30 per person per month; Enterprise custom
Trial: 14-day free trial on Pro; no credit card required
Notable capability: Decision-aware review based on captured reasoning and ownership
Website: haystackeditor.com

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