Side by side

Spec Layer vs Terrazzo

Both stand on design system software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

Spec Layer

Free plan Web

Spec Layer connects Figma documentation and token exports with repository workflows, while keeping deterministic design details local. Consider its file, update, library-size, and AI data-flow limits when selecting a plan and workflow.

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Terrazzo

Free plan iPhoneMacWeb

Terrazzo combines token generation and linting in an open-source CLI, with inputs, outputs, and integrations spanning several formats and tools. Consider the experimental status of Swift support and the Figma authentication requirement if those workflows matter to your team.

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The facts

	Spec Layer	Terrazzo
Free plan	Yes	Yes
Open source	Not published	Not published
Runs on	Web	iPhone, Mac, Web
Lowest paid plan	Pro: $7.99 a month	Free or on request
Plans published	3	1
Maker	Not published	Not published
Website	spec-layer.com	terrazzo.app
On design system software	#13 of 22	#9 of 22

Spec Layer: what it does well

Documents measurements, variants, anatomy, and tokens.
Exports component details as YAML or Markdown.
CLI can export CSS custom properties.
Deterministic design data runs locally in Figma.
MIT licensed.

What to know first

CLI requires Node.js 22 or newer.
Free plan covers one Figma file.
Published libraries are limited to 5 MB.
AI writing sends derived data to Anthropic.

Terrazzo: what it does well

Free to use forever under the MIT license
Accepts JSON, JSONC, and YAML token files
Lint rules cover naming, duplicates, and accessibility criteria
Can run in continuous integration
Supports documented Tailwind and Vanilla Extract integrations

What to know first

The Swift plugin is experimental
Figma import requires an account and authentication token
Design Lab is listed as coming soon

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