similarweb-free-market

name	similarweb-free-market
description	Web market / industry analysis from a SimilarWeb FREE account: list 200+ industry categories and rank the top + rising websites in any industry by traffic share, visits, engagement, and month-over-month change.

similarweb-free-market

Industry/market analysis available to a free / expired-trial SimilarWeb account. This is the free-tier counterpart of similarweb-market (which needs a SimilarWeb Pro plan).

What the free tier gives you:

• The last 3 complete months of data, worldwide.
• The combined "All traffic" channel only — per-channel industry rankings (Search, Social, Display, Referral, Direct, Email, Gen AI, Affiliates) are crown-locked behind a paid plan.

Prerequisites

• Node.js 22+
• Chrome with remote debugging (only for auth)
• chrome-cdp skill (only for auth)
• A SimilarWeb account (free is fine), logged in at pro.similarweb.com

Setup

Open SimilarWeb in Chrome and log in, then run:

node similarweb-free-market.mjs auth

Usage

# List every industry category (216 of them)
node similarweb-free-market.mjs industries

# Filter the category list by substring
node similarweb-free-market.mjs industries music
node similarweb-free-market.mjs industries shopping

# Top + rising websites in an industry
node similarweb-free-market.mjs leaders Arts_and_Entertainment
node similarweb-free-market.mjs leaders Arts_and_Entertainment/Music
node similarweb-free-market.mjs leaders E-commerce_and_Shopping --count=50

Commands

Command	API endpoint	Returns
auth	CDP cookie extraction	Saves session cookies
industries [search]	/api/categories	All industry categories (top-level + subcategories), optionally substring-filtered
leaders <industry>	/api/Market/Leaders/Table	Per website: global & category rank, market share, avg monthly visits, unique visitors, bounce rate, pages/visit, visit duration, MoM change, desktop/mobile split. Includes topPlayers and risingPlayers.

Industry keys are the industry values returned by the industries command — either a top-level name (Arts_and_Entertainment) or Parent/Sub (Arts_and_Entertainment/Music).

Data storage

~/.local/share/showrun/data/similarweb-free-market/
  session.json                              # Auth cookies
  cache/
    industries.json
    Arts_and_Entertainment_Music-leaders.json

Session expiry

SimilarWeb sessions last days to weeks. On 401/403 errors, re-run node similarweb-free-market.mjs auth with an active SimilarWeb tab open in Chrome.