IonWarpGraphite is a code review platform for GitHub with stacked pull requests, a merge queue and an AI reviewer, Graphite Agent, which comments on new pull requests and suggests fixes.
Guide
Graphite code review: Graphite Agent, and how IonWarp compares
Graphite is a code review platform for GitHub, built around stacked pull requests and a merge queue. Its AI reviewer, Graphite Agent, replaced the Diamond reviewer in October 2025.[1] Once you enable it, it reviews all new pull requests in the repositories you pick, comments where it finds issues and suggests fixes.[2]
Graphite prices per user. Starter is $20 a user a month billed annually, with limited AI reviews; unlimited AI reviews come with Team, $40 a user a month billed annually.[3] IonWarp prices per workspace and does one job, review: Pro is $49/mo with 5 seats, and there is no stacking or merge queue. Graphite Agent is not in our benchmark, so we do not compare their findings.
Which one fits
Graphite, for stacks
If your team wants stacked pull requests and a merge queue, Graphite does both, and its AI reviewer comes with them.
IonWarp, for review
If you want review only, priced per workspace, with separate security, performance, docs and SOC 2 reviewers and public benchmarks.
Both
IonWarp installs as its own GitHub app, so it can run next to Graphite on the same repositories.
IonWarp and Graphite
Graphite facts are from its pricing page, docs and blog, read on 2026-10-04; numbered notes link to each.
| Criterion | IonWarp | Graphite |
|---|---|---|
| What it is | A GitHub app that reviews pull requests, adding security, performance and docs reviewers when the diff needs them | A code review platform with stacked pull requests, a merge queue and an AI reviewer, Graphite Agent[3] |
| What the AI review posts | Findings with a severity, a suggested fix and an AI fix prompt, tracked across pushes until resolved or declined | Comments on potential issues in new pull requests, with suggested fixes[2] |
| Price | One price per workspace: Starter free for 3 seats; Pro $49/mo with 5 seats | Per user, billed annually: Starter $20 a month with limited AI reviews, Team $40 with unlimited[3] |
| Stacking and merge queue | Not offered | Stacking on every plan; a merge queue on Team and Enterprise[3] |
| GitHub Enterprise | On the Enterprise plan | GitHub Enterprise Server on the Enterprise plan[3] |
Starter is free for 3 seats. Pro is $49 a month with 5 seats, and Max is $149 a month with 10 seats. Compare plans
Frequently asked questions
Starter is $20 a user a month and Team, with unlimited AI reviews, is $40 a user a month, both billed annually (Graphite pricing page, Oct 2026). Hobby is free for personal repositories.
Yes. In October 2025 Graphite retired the Diamond name and brought its AI reviewer and chat together as Graphite Agent.
IonWarp Pro is $49/mo for a workspace with 5 seats. Five developers on Graphite Team pay $200 a month (Graphite pricing page, Oct 2026).
Yes. IonWarp installs as its own GitHub app and comments on pull requests next to Graphite Agent.
Sources
- Meet Graphite Agent: the next evolution of AI code review (Oct 7, 2025) — Graphite, read 2026-10-04.
- AI Reviews: Setup & configuration — Graphite docs, read 2026-10-04.
- Pricing — Graphite, read 2026-10-04.
Get a review on your next pull request
Install IonWarp on GitHub. Starter is free for 3 people, with 15,000 credits to start.
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