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Fallow

Codebase intelligence for TypeScript and JavaScript

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Analyzes TypeScript and JavaScript codebases to report health, complexity, duplication, architecture drift, styling drift, and unused code from a single

Overview

The Fallow homepage

Fallow is a codebase analyzer for TypeScript and JavaScript that reads your entire repository as a single graph in under a second. It identifies complexity hotspots and health scores, detects architecture drift from boundary rules and circular dependencies, finds duplicated code and styling drift from design systems, and discovers unused files, exports, and dependencies. The tool runs locally via CLI, integrates with VS Code, and can be used with coding agents and CI/CD workflows. An optional runtime layer adds production data to show which code actually executed.

Capabilities

Health scoring and complexity analysis
Dead code and unused export detection
Code duplication detection
Architecture boundary enforcement
Styling drift detection
VS Code extension with Code Lens and fixes
CLI with local analysis
MCP server and agent integration
Runtime coverage with production data
Automatic code fixes

Pricing

Pricing model: Free

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Fallow fact sheet

Community votes	0
Founded	2026
Stage	Startup
Based in	Rijswijk, Netherlands
Website	fallow.tools

Fallow metrics

Vendor metrics for fallow.tools: Ahrefs Domain Rating and Majestic link data, with the delta since the last review.

Domain Rating: 32; no change since last check
Trust Flow: 8; no change since last check
Citation Flow: 40; no change since last check
Referring domains: 208; no change since last check
External backlinks: 1,774; no change since last check

Vendor Domain Rating (Ahrefs) checked 6 Nov 2026, spec changed 1 Nov 2026. Vendor topic: Computers/Programming/Languages (7). Vendor Majestic data checked 1 Nov 2026, spec changed 1 Nov 2026. Link metrics supplied by Majestic. Trust Flow, Citation Flow and Topical Trust Flow are trademarks of Majestic-12 Ltd.

Fallow vendor domain

Open the vendor record

We read this from the registry's RDAP record on 5 Nov 2026, 13:18 UTC.

Domain age: 7 months
Registered: 20 Mar 2026
Expires: 20 Mar 2027
Registrar: Spaceship, Inc.
DNSSEC: Not signed

Vendor domain report: fallow.tools

Fallow post-launch report

Measured after Fallow went live on SaaS Directory Pro on 1 November 2026.
Measure	At launch, then latest
Domain Rating (Ahrefs)	32 to 32 no change since launch 1 Nov 2026, then 5 Nov 2026
Trust Flow (Majestic)	8 first measured 1 Nov 2026
Referring domains (Majestic)	208 first measured 1 Nov 2026

Day 4 since launch. Next receipt: day 30, 1 Dec 2026. Many things move these figures, so a change is not proof of cause. Only stored readings are shown.

Biggest gains on SaaS Directory Pro

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Buyer questions

How does Fallow differ from linters?

Linters check individual files, while Fallow checks the entire codebase as one graph. It finds problems between files that never mention each other, which linters and TypeScript cannot detect. The tool reads the whole module graph in under a second, making it fast enough for pre-commit hooks.

Is my source code uploaded when using Fallow?

No. The scan runs locally, reads your files, and writes a report without uploading any source code. Product telemetry is off by default and only sends data if you enable it with fallow telemetry enable. The telemetry does not include your code or IP address.

Can Fallow be used without installing it?

Yes. You can run Fallow immediately with npx fallow, which requires no configuration on the first run. After the first run, it reports health, duplication, and unused code.

Does Fallow work with coding agents?

Yes. Fallow provides structured tool calls through its MCP server for coding agents like Claude Code and Cursor. Agents can use Fallow to see the entire repository structure before making changes, helping them avoid duplicating code or violating architecture boundaries.

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