Your team needs to build an integration that automatically comments on PRs across the organization's repos. Should you use a GitHub App, an OAuth App, or a personal access token?

A personal access token (PAT) is tied to an individual user's identity and permissions — simple to set up, but the integration inherits that specific person's access, breaks if they leave or lose access, and every action is attributed to them personally rather than the integration. A GitHub App is the purpose-built option for this scenario: it has its own identity, granular per-repository and per-permission-type access (not "everything the installing user can access"), doesn't depend on any individual's account, and actions are correctly attributed to the app, not a person — the clear right choice for an organization-wide automated integration.

The three options exist at genuinely different points on the spectrum of "how tightly is this integration's identity and access tied to an individual human," and for an organization-scale automated integration specifically, that distinction is what actually drives the right choice.

A personal access token inherits an individual's full account permissions: simple to generate and use, but the integration's access is exactly whatever that specific person can access — meaning if they leave the company, get their access revoked, or their account is compromised, the integration breaks or is compromised right along with them. Every action the integration takes is also attributed to that person in GitHub's activity logs and PR comments, which is both a poor audit trail (it looks like a human did it, not the actual automation) and a governance problem (the integration's continued function depends on one specific person's account remaining active and correctly permissioned indefinitely).

An OAuth App authenticates as a user too, just via a different flow: rather than a static token, it uses OAuth's authorization flow, but critically, it still acts on behalf of whichever user authorized it, inheriting that user's permissions — this is more appropriate for something like a third-party tool a user explicitly connects to their own account, not for an organization-wide automated integration that shouldn't be tied to any specific person's identity at all.

A GitHub App has its own distinct identity, independent of any user: it's installed on specific repositories (or the whole organization) with specific, granular permissions you explicitly grant (read PRs, write PR comments, without necessarily needing broader repository access) — its access doesn't depend on any individual's account status, actions are correctly attributed to the app itself in logs and UI (showing up as "your-app-name" rather than a person's name), and permissions can be scoped much more narrowly than "everything this user can do."

GitHub Apps also get higher API rate limits and better scalability for organization-wide use: since GitHub Apps are specifically designed for this kind of integration use case, they come with rate limit allowances that scale better for genuinely organization-wide automation than a PAT's fixed per-user rate limit, which matters once an integration is actively working across many repositories simultaneously.

The practical decision for this specific scenario is clear: an organization-wide, automated PR-commenting integration should be a GitHub App — it's specifically the tool built for exactly this use case (independent identity, granular scoped permissions, correct attribution, better rate limits), while a PAT or OAuth App would work initially but carry the ongoing governance and continuity risk of being tied to an individual's account.

• A personal access token inherits an individual's full account permissions and breaks or poses a security risk if that person's account changes status — a poor fit for organization-wide automation.
• An OAuth App still acts on behalf of whichever user authorized it, appropriate for user-initiated third-party connections, not identity-independent automation.
• A GitHub App has its own distinct identity, granular per-repository/per-permission access, correct action attribution, and better rate limits — the purpose-built choice for organization-scale automated integrations.
• For any integration that shouldn't depend on a specific individual's account remaining active and correctly permissioned, a GitHub App is the right default.

• GitHub Docs: Differences between GitHub Apps and OAuth apps
• GitHub Docs: About creating GitHub Apps