Where Mergify's free tier stops
Mergify Mergify's free tier is broad on features but narrow on team size. It includes CI Insights, Test Insights, Merge Queue, Merge Protections, email support, 24/7 Premium Support, Slack Connect Support Channel access, Dedicated Customer Success Manager access, and on-premise deployment. The stop point is the private-repository user limit: up to 5 users. If your private GitHub workflow needs more than five people, the free plan ends there even though the feature set itself looks close to paid.
Switch table
| Mergify | Reviewable | PullFlow | Tugboat | SemanticDiff | CodeRabbit | Gerrit Code Review | |
|---|---|---|---|---|---|---|---|
| private repo users | Up to 5 users | Personal private repositories, unlimited reviews | Up to 5 private-repository users | Unlimited users | Always free for 3 seats | Unlimited public and private repositories during 14-day free usage | No usage caps on self-hosted open-source software |
| public repositories | Unknown | Unlimited reviews for public repositories | Unlimited public repositories | Unlimited previews | Supports public repositories | Unlimited public and private repositories during 14-day free usage | Free hosted for public GitHub repositories |
| code review workflow | Yes | Yes | Yes | No | Yes | Yes | Yes |
| merge automation | Yes | No | No | No | No | No | No |
| CI or test insights | Yes | No | No | No | No | No | No |
| self-hosting | Yes | No | No | No | No | No | Yes |
| Card required | - | No | No | No | Yes | No | Unknown |
| First paid tier | - | Team, $8 per contributor / month | Team, $5/user /month | Intro, $39 / month | Professional, $10 per seat and month | Pro, $24/mo/user | Varies by usage |
The alternatives
Reviewable
FTV 57 / 100Reviewable's free plan covers unlimited reviews for public repositories and personal private repositories, with email support included. It is built around asynchronous code review, so the free tier is useful if you want a review workspace rather than merge automation. The main free-tier constraint is not team size in the same way as Mergify, but repository scope and a 10MB file-upload cap. For individual developers or small private projects, that can be enough to stay free while still getting a dedicated review flow.
- Beats Mergify: Unlimited reviews for public and personal private repositories.
- Falls short: It does not offer merge queues, merge protections, or CI/test insights.
- Who should switch: Switch to Reviewable if your main need is code review workflow, not merge automation.
PullFlow
FTV 56 / 100PullFlow's free tier gives you unlimited public repositories, unlimited public users, unlimited private repositories, and up to 5 private-repository users. It is designed for review activity that stays connected across GitHub, Slack, and VS Code, so the free plan is a good fit if your team wants reviews to happen where people already work. Compared with Mergify, it is less about gating merges and more about synchronizing conversation and approvals across tools. The cap is the same on private users, but the collaboration surface is broader.
- Beats Mergify: Broader review collaboration across GitHub, Slack, and VS Code.
- Falls short: It does not list CI Insights, Test Insights, Merge Queue, or Merge Protections.
- Who should switch: Switch to PullFlow if you want review coordination across chat and editor, not merge orchestration.
Tugboat
FTV 61 / 100Tugboat's free plan includes unlimited users, unlimited previews, 5GB storage, 512MB RAM, 0.5 CPU, shell access, centralized logging, a command-line tool, API access, email capturing, and community support. It is not a code review tool, but it is free infrastructure for preview environments tied to pull requests. If your bigger pain is validating changes before merge rather than automating the merge itself, Tugboat gives you a lot of room before you need to pay. The tradeoff is that it solves a different layer of the delivery pipeline.
- Beats Mergify: Unlimited users and previews with concrete preview-environment resources.
- Falls short: It is a deployment preview platform, not merge automation for GitHub pull requests.
- Who should switch: Switch to Tugboat if you need preview environments more than merge workflow automation.
SemanticDiff
FTV 44 / 100SemanticDiff's free tier is always free for 3 seats and includes public repositories, private repositories, review comments, approve or request-changes actions, pull request synchronization with GitHub, 14 programming languages, a minimap view, and code-awareness features like hiding style changes, detecting moved code, and detecting refactorings. The free plan is focused on understanding diffs, which can make reviews faster and less noisy. It is narrower than Mergify on workflow automation, but stronger on how diffs are presented to reviewers.
- Beats Mergify: Language-aware diffs with moved-code and refactoring detection.
- Falls short: It is capped at 3 seats, below Mergify's 5-user private-repo free limit.
- Who should switch: Switch to SemanticDiff if review quality and diff clarity matter more than merge automation.
CodeRabbit
FTV 47 / 100CodeRabbit's free offering includes a 14-day free usage of the Pro plan with no credit card required, plus unlimited public and private repositories, PR summarization, and reviews in IDE. It also has an open-source public-repository free path, so it can be useful both as a trial and as an ongoing option for some teams. Compared with Mergify, it is more AI-assisted and spans IDE review as well as pull requests. The downside is that the truly free Pro access is time-limited, so it is not as steady as Mergify's always-free team cap.
- Beats Mergify: AI-assisted review with IDE support and unlimited repositories during the free period.
- Falls short: The main Pro access is only a 14-day free usage window, not a perpetual free tier.
- Who should switch: Switch to CodeRabbit if you want AI review assistance and can live with trial-style free access.
Gerrit Code Review
FTV 90 / 100Gerrit Code Review is self-hosted open-source software with no usage caps, and it also offers free hosted Gerrit code review for public GitHub repositories. That makes it the freest option here for teams that are willing to run their own infrastructure or adopt Gerrit's workflow. There is no seat cap in the free tier description, and no published paid tiers on the page. The tradeoff is adoption cost: it is a code review system, not a merge automation product with Mergify-style built-in insights and queueing.
- Beats Mergify: No usage caps on self-hosted open-source use.
- Falls short: It is a different workflow model and does not package Mergify-style merge automation features.
- Who should switch: Switch to Gerrit Code Review if unlimited self-hosted review capacity matters more than convenience.
Two quick picks
PullFlow
PullFlow is the closest fit if you want to stay in GitHub-centered review workflows with a similar private-repo user cap. The free tier keeps private repositories and up to 5 private users, so switching should require less process change than moving to a preview or self-hosted tool.
Gerrit Code Review
Gerrit Code Review gives the most free-tier headroom because its self-hosted open-source option has no usage caps. If you can run it yourself, there is no published seat or activity ceiling to hit before paying.
Frequently asked questions
Which alternative is closest to Mergify's merge-queue style workflow?
None of the alternatives listed match Mergify's merge queue and merge protection combo directly. PullFlow and Reviewable are closer to review collaboration, while Gerrit is closer to a review system you can adapt yourself.
Which alternative stays free for the most people on a private repo?
Gerrit Code Review, if you self-host it, because the free open-source option has no usage caps. Among hosted options, PullFlow and Mergify both top out at 5 private-repository users.
Which alternative is best if I only need code review, not merge automation?
Reviewable and SemanticDiff are the clearest fits. Reviewable focuses on review workflow, while SemanticDiff focuses on diff quality and review actions.
Do any of these alternatives require a credit card for free use?
Reviewable, PullFlow, Tugboat, and CodeRabbit say no credit card is required. SemanticDiff's free-plan card requirement is not stated here, so it is Unknown. Gerrit Code Review does not provide a free-plan card requirement in the supplied details, so it is also Unknown.
Bottom line
For the most common Mergify free-tier miss, the best alternative is PullFlow. It keeps the private-repo user cap at 5, so the switch is straightforward if your team already lives in GitHub-centered review work. If you need more than that, Gerrit Code Review is the stronger long-term free choice because self-hosted use has no usage caps. Pick PullFlow for the nearest workflow match, or Gerrit if your priority is unlimited free headroom.
Read the full listing for Mergify. Scores use the FTV methodology at /ftv. Browse more alternatives on /alternatives, or head-to-head comparisons on /compare.