Stitch logs by request ID
LogStitch reads the request ID on each CloudWatch line and reconstructs one Lambda invocation in order, so concurrent executions are easier to follow than a raw timestamp-sorted stream.
LogStitch
LogStitch is a native macOS AWS Lambda log viewer that stitches CloudWatch log lines into per-invocation views. It helps developers inspect, correlate, and analyze Lambda activity locally across accounts and regions.
Overview
LogStitch is a native macOS app for reading AWS Lambda logs in a more usable format than the raw CloudWatch stream. Instead of leaving concurrent invocations interleaved by timestamp, it groups lines by request ID and presents each invocation as a single stitched record.
The product is built for local, repeated investigation. It fetches logs from AWS, stores them on the Mac in a local SQLite database, and lets users search, filter, re-open, and analyze invocations without re-querying CloudWatch every time. The site also positions LogStitch for multi-account and multi-region Lambda workflows, live tailing, performance analysis, and error pattern detection.
Core capabilities
Cross-account and cross-region correlation
It can follow a request across functions, accounts, and regions with a swim-lane timeline, propagation latency, and the function that originated the error.
Local-first log history
The app keeps fetched logs in a local SQLite database, enabling re-searching and filtering without rescanning CloudWatch each time.
Live tail with structured playback
A live tail window supports raw streaming or invocation-stitching modes, and completed invocations are saved automatically.
Performance and cost analysis
Built-in analytics cover p99 trends, cold-start distributions, memory right-sizing, and a monthly cost projection in the same interface as the logs.
Pattern and anomaly detection
LogStitch clusters repeated error messages into patterns and surfaces anomalies using statistical scoring across duration, errors, cold starts, and cost.
Common workflows
Debug a single Lambda invocation
Open a Lambda function’s logs and inspect one invocation at a time instead of reconstructing the request from interleaved CloudWatch lines.
Follow a distributed serverless request
Trace a user request through several functions, accounts, or regions using the swim-lane correlation view and propagation timing.
Monitor an incident in real time
Keep a live 15-minute tail open while investigating an incident, switching between raw streaming and stitched invocations as logs arrive.
Study Lambda performance and cost
Review p99 duration trends, cold-start behavior, memory utilization, and projected cost for a function in the same window as its logs.
Group recurring errors and anomalies
Cluster repeated failures into patterns and inspect anomalies when the same error, cold start, duration spike, or cost spike keeps returning.
Pros and Cons
Pros
- Groups interleaved Lambda log lines into per-invocation views that are easier to read than raw CloudWatch output.
- Works across multiple AWS accounts and regions through AWS profiles.
- Stores logs locally for offline access and repeated re-analysis without rescanning CloudWatch.
- Includes live tail, analytics, and error pattern detection in the same product.
- Adds MCP access for Claude and other compatible local AI clients.
Cons
- The collected pricing page was inaccessible, so the exact cost and plan details are not confirmed in the provided evidence.
- The comparison page describes LogStitch as single-user, so the source does not support team-shared history or collaborative workflows.
- The app is described as native macOS, so it is not presented as a cross-platform desktop tool in the source text.
FAQ
What does LogStitch do?
LogStitch is a native macOS app for viewing AWS Lambda logs. It groups interleaved CloudWatch log lines by request ID so you can read each invocation as one stitched timeline.
Does LogStitch keep logs locally?
The source describes LogStitch as using your AWS profiles to fetch logs, then storing them locally in SQLite. After that, searches, re-queries, and filters run from local storage.
Can it work across multiple AWS accounts and regions?
Yes. The comparison page says LogStitch can stitch invocations across multiple accounts and regions, using separate AWS profiles.
Does LogStitch integrate with AI tools?
The source says LogStitch includes a built-in MCP server for Claude and other MCP-aware clients that can reach a local port.
What does LogStitch cost?
The pricing page was not accessible in the collected evidence, so the exact pricing and plan structure could not be verified from the source text provided.
Quick Facts
- Category
- Developer Tool
- Platform
- Native macOS app
- Primary use
- AWS Lambda log viewing and analysis
- Data source
- Amazon CloudWatch Logs
- Storage model
- Local SQLite database
- Vendor site
- logstitch.app
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