Compare Logs Across Layers
Upload two or more log files and let Delta find the connections. Delta correlates events across layers, detects regressions, and reveals patterns that are invisible when looking at logs in isolation.
What Is Delta?
Delta is logcat.ai's multi-file comparison engine. Upload two or more log files — from different layers, different devices, or different time periods — and ask questions that span all of them.
Delta indexes every file, aligns timestamps, and cross-references events to find correlations that would take hours to discover manually. Whether you're debugging a cross-layer issue or hunting for a regression, Delta gives you answers that no single-file analysis can.
See It In Action
Watch Delta correlate events across multiple log files in real time
Delta Correlation Engine
Multi-file cross-layer analysis
Why Compare Logs?
The hardest bugs don't live in one log file
Multi-Source Issues
The kernel log says 'driver timeout,' the logcat shows 'service unavailable,' and the bugreport has a timing error — are they related? Without comparison, you'll never know.
Manual Correlation Is Slow
Aligning timestamps, mentally mapping events across files, and searching for cause-effect chains takes hours of expert time — if you even know what to look for.
Root Cause Spans Layers
The symptom appears in the app layer, but the root cause lives in the kernel or hardware driver layers. You can only see it when you look at all layers simultaneously.
Regressions Hide in Diffs
When comparing 'working' and 'broken' logs, the differences are subtle — a timing change, an extra error, a missing event. Automated comparison catches what humans miss.
Flexible by Design
Delta adapts to any comparison scenario — upload any combination of log files and let Delta figure out the connections
Cross-Layer Correlation
Upload multiple log files — logcat, dmesg, bugreport sections — and Delta finds related events across system layers. See how a low-level kernel event connects to a framework error and ultimately an app crash.
Regression Detection
Compare logs from two software versions on the same device. Delta identifies what changed — new errors, timing shifts, missing events — so you know exactly what the update broke.
Device-to-Device
Same software, different hardware. Upload logs from Device A and Device B to find device-specific behaviors, hardware quirks, or configuration differences.
Before/After Analysis
Compare logs from before and after a system update, configuration change, or firmware update to isolate the exact impact of the change.
Multi-Source Investigation
Combine bugreport + kernel dmesg + logcat to build a complete picture. The more context you provide, the better the AI can trace cause-effect chains.
Field Test Comparison
Compare field test logs from different locations, times, or conditions. Identify environment-specific issues, time-of-day patterns, or configuration-specific behaviors.
Powerful Comparison Tools
AI-powered features designed for multi-file analysis
Timeline Alignment
Automatically synchronize timestamps across files, even when they use different formats or clock sources. See events in true chronological order.
Cross-Reference Detection
Delta identifies related events across files — matching error codes, correlated timestamps, cause-effect patterns — and highlights the connections.
Cross-File Deep Research
Ask questions that span all uploaded files. Deep Research searches across every log to build a comprehensive answer with evidence from multiple sources.
Shareable Results
Share your Delta analysis via link with team members. Everyone sees the same correlated view — no need to re-upload or re-analyze files.
How Delta Works
Four simple steps from upload to insight
Upload Your Files
Upload two or more log files — any combination of logcat, dmesg, bugreport, vendor tool exports, or other plaintext logs.
AI Indexes Everything
Delta processes all files, extracts events, aligns timestamps, and builds a unified searchable index across all your logs.
Ask Your Question
Ask anything — 'why did the app crash?', 'what changed between these versions?', 'is the kernel panic related to the framework error?'
Get Correlated Answers
Delta searches across all files, finds cross-references, and delivers a unified answer with evidence from every relevant source.
Who Uses Delta
Delta serves engineers across every vertical and every stage of the development lifecycle
Device & Platform Engineers
Compare bugreports across BSP versions, correlate kernel logs with framework crashes on phones, tablets, and IoT devices.
Telecom Engineers
Diff modem diagnostic traces before and after firmware updates, correlate NAS/RRC events with RIL logs to isolate call drops and registration failures.
Automotive Engineers
Compare CAN bus traces across ECU firmware versions, correlate VHAL events with IVI bugreports to trace vehicle software regressions.
QA & Release Teams
Compare logs from passing vs. failing test runs across any device type or vertical. Detect regressions by identifying exactly what changed between software versions.
Frequently Asked Questions
Common questions about Delta comparison
Delta supports comparing two or more files simultaneously. The more context you provide, the better the AI can correlate events and identify patterns across sources.
Delta supports any plaintext log format — logcat, dmesg, bugreport, vendor tool exports, and any other human-readable log files. You can mix and match different formats in a single comparison.
No. You can compare logs from different devices, different software versions, or even different platforms. Delta is flexible — use it for device-to-device comparison, regression detection, or any multi-source investigation.
Yes. Delta handles logs from different time periods. This is useful for before/after comparisons, regression detection across builds, and comparing field test logs from different sessions.
Upload logs from a 'working' version and a 'broken' version. Delta identifies differences — new errors that appeared, events that stopped occurring, timing changes, and behavioral shifts — helping you pinpoint exactly what the update broke.
Yes. Delta automatically detects and normalizes timestamp formats across files, aligning events chronologically even when files use different date/time formats or clock sources.
Yes. All files are processed in isolated environments, encrypted at rest and in transit, and never shared between users. Your comparison data is private to your account.
Start Comparing Your Logs
Upload two or more log files and discover the connections hiding between them