LogStitch

Turn chaotic CloudWatch logs into one coherent Lambda invocation story

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Added Jul 2026

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What is Logstitch?

LogStitch is a native macOS app that solves the CloudWatch log chaos problem by automatically grouping all logs from a single AWS Lambda invocation across multiple functions into one coherent, readable story. It works by reading request IDs from CloudWatch streams and stitching them back into their original invocations locally and instantly. Built for developers and DevOps teams managing complex AWS Lambda architectures who need fast, offline access to structured invocation data.

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Key Features of Logstitch

Request ID grouping across concurrent functions
Structured JSON parsing of logs
Cold-start detection and flagging
Intel & Apple Silicon support
MacOS Keychain credential storage
Full local history with offline access
Concurrent invocation tracking
Error stack trace assembly
Pattern linking for debugging
Sub-millisecond local processing

Who Should Use Logstitch?

Debug multi-function AWS Lambda invocations

Track distributed request flows across services

Analyze performance metrics (duration, memory, cold starts)

Investigate error patterns in concurrent executions

Optimize Lambda resource allocation

Monitor database connection timeouts and failures

Logstitch: Pros & Cons

✓Pros

Works offline with full local history
Native macOS performance built on AppKit
Instant grouping of interleaved CloudWatch logs
Structured JSON parsing for easier debugging
Secure credential storage in macOS Keychain
Supports concurrent invocation tracking
No scrolling needed — entire invocation in one view

Frequently Asked Questions about Logstitch

What problem does LogStitch solve?

CloudWatch interleaves log lines from every concurrent Lambda execution by timestamp, making it hard to follow a single invocation. LogStitch groups all logs from one request ID across all functions it touched into one coherent story.

Does LogStitch work offline?

Yes, LogStitch works completely offline with full local history of your Lambda invocations stored locally on your Mac.

What platforms does LogStitch support?

LogStitch is a native macOS app supporting both Intel and Apple Silicon processors running macOS 26.1 or later.

How does LogStitch authenticate with AWS?

LogStitch stores AWS credentials securely in the macOS Keychain and works with AWS Lambda logs and CloudWatch streams.

What information does LogStitch show about each invocation?

LogStitch displays request ID, function name, duration, memory usage, cold-start status, log count, parsed JSON, and error stack traces for each invocation.