Autonomous code review agent

Your AI engineer
that never sleeps.

Loopback monitors your GitHub repos 24/7. When a PR opens, it reviews the diff, flags bugs and security issues, and reports back before any human reviewer has to lift a finger.

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// PR #847 opened
▶ Scanning diff...
✓ auth_handler.ts // no issues
⚠ payment.js // SQL injection: line 42
▶ Review posted in 4.1s

◉ Loopback Review 4.1s

HIGH

payment.js:42

SQL injection: user input concatenated into query without parameterization.

Use parameterized query: db.query('SELECT * FROM users WHERE id = $1', [userId])

LOW

auth_handler.ts:12

Consider using strict equality (===) instead of ==

INFO

utils.ts:88

Missing JSDoc for exported function getUserById()

How it works

Three steps. Zero bottlenecks.

Connect your repo

One-click GitHub App install. Loopback gets read access to your repos and write access to post review comments.

PR opens, review fires

Every pull request triggers Loopback. It reads the diff, runs multi-agent analysis across security, logic, and style, then posts structured inline comments in under 10 seconds.

Fix it, ship it faster

Your team sees and acts on findings before human review. Issues get resolved, PRs get approved, code gets shipped. No waiting for a reviewer who is in another meeting.

The review dashboard

Every PR, scored. Every finding, ranked.

Loopback builds a review score from 0 to 100 on every pull request. High-severity findings pull the score down. Your team can set quality gates at any threshold and block merges below the line.

98%

precision on findings

<10s

average review time

3.2x

more bugs caught per sprint

Loopback — api-service

feat: update user payment flow

#847 · alice · 2h ago

1 high 2 low

fix: rate limit headers

#846 · bob · 5h ago

1 info

chore: bump dependencies

#845 · charlie · 1d ago

2 info

What it catches

Security. Logic. Style. Architecture.

Security vulnerabilities

SQL injection, XSS, broken auth, hardcoded secrets, insecure deserialization. Every entry point gets audited, not just the ones the linter catches.

Logic errors

Off-by-one mistakes, race conditions, null pointer dereferences, incorrect business logic. The agent traces data flow across files, not just across the diff.

Code style & standards

Custom rules you define. No more arguing about tabs vs spaces in review comments. Set it once, Loopback enforces it on every PR automatically.

Architecture drift

Detects when PRs introduce patterns that contradict your team's architectural decisions. Dependency cycles, wrong-layer violations, shared state abuse — caught before they spread.

Test coverage gaps

Flags files changed without corresponding test updates. Shows exactly which functions gained or lost coverage and suggests test cases that would fill the gaps.

Contextual chat

Ask Loopback to explain any finding, suggest a fix, or walk through the changed files. It knows your codebase, not just the diff.

Loopback reviews every PR in under 10 seconds.

Join the waitlist for early access — we're onboarding 10 teams this month.

Used by engineering teams who refuse to ship un-reviewed code.

Code review should not be a bottleneck.
It should be a competitive advantage.

Every hour your team waits for a review is an hour your code is not in production. Loopback runs continuously, catches what humans miss, and keeps your merge queue moving. When your team has a review backlog, Loopback clears it. When you need a second opinion on a risky change, Loopback gives it instantly. Start free. No credit card. No sales call.