Awesome Open-Source SEO

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A curated list of open-source SEO tools you can self-host, fork, and read line by line.

Every entry ships real source code under an open license. No SaaS trials, no affiliate links, no freemium walls.

Why this list exists: existing awesome-seo lists mix tools with articles, courses, and paid products. This one is tools-only, source-available-only. If it doesn't run on your machine, it doesn't belong here.

Badges — runs from a terminal · ships a self-hostable web app · targets AI-search visibility · has commits in the last 12 months · ⚠️ means the repo is archived.

Star counts, activity badges and archive flags are refreshed automatically every month by this script — no stale snapshots. Last refresh: Oct 2026.

Featured on this list? Grab a badge for your README:

[![Featured in Awesome Open-Source SEO](https://img.shields.io/badge/Featured_in-Awesome_Open--Source_SEO-7c3aed?style=for-the-badge)](https://zens.ink/awesome)

Contents

• All-in-One Platforms
• Crawlers & Site Audit
  • Site Crawlers & Auditors
  • CI & Performance Budgets
  • Crawler Frameworks
• Rank Tracking
• Analytics & Log Analysis
  • Self-hosted Web Analytics
  • Log & Server Analysis
• GSC Data Extraction
• SERP & Keyword Research
  • SERP APIs & Scrapers
  • Keyword & Data Toolkits
• GEO & AI Search Visibility
  • Agent Skills & Prompt Libraries
  • GEO Platforms & Auditors
  • llms.txt Infrastructure
• Framework & CMS Integrations
  • React & Next.js
  • PHP, WordPress & Laravel
  • Static Site Generators
  • Other Frameworks
• Indexing & Sitemaps
• CLI Toolkits
• Other Curated Lists
• Recommended Stacks

All-in-One Platforms

• open-seo — Open-source alternative to Semrush and Ahrefs. The most complete attempt at a full suite so far. (25.9k★, MIT)
• rankme.fast — Self-hosted SEO platform in active early development: rank tracking, audits, and reporting under one roof. (798★, AGPL-3.0)

Crawlers & Site Audit

Site Crawlers & Auditors

• python-seo-analyzer — Python tool that crawls a site and reports structural issues. One of the oldest projects in this space. (1.5k★)
• linkinator — Broken-link checker that crawls websites and validates links. Made by a Google engineer. (1.3k★, MIT)
• LibreCrawl — Free desktop SEO crawler, an open-source alternative to Screaming Frog. (1.1k★, MIT)
• seonaut — Open-source SEO audit tool with a web interface. Self-hostable. (849★, MIT)
• crawlseo — Open-source SEO monitoring: Search Console + crawler + Core Web Vitals in one. (660★, MIT)
• seo-audits-toolkit — Lighthouse and security-header crawler that audits whole sites. (824★)
• search-solved-public-seo — Collection of practical Python SEO scripts by Lee Foot. (420★)

CI & Performance Budgets

• lighthouse — Google's official open-source auditor for performance, SEO, and best practices. Runs from CLI or CI. (31k★, Apache-2.0)
• lighthouse-ci — Runs Lighthouse on every commit and asserts budgets in CI. (7.1k★, Apache-2.0)

Crawler Frameworks

Not SEO tools per se — the standard raw material for building custom crawlers for JS-rendered pages and structured extraction.

• scrapy — The Python crawling framework. (65.2k★, BSD-3-Clause)
• brozzler — Distributed, browser-based (Playwright) web crawler from the Internet Archive. (822★)

Rank Tracking

• SerpBear — Self-hosted rank tracker (Next.js + SQLite, Docker) with unlimited domains/keywords, GSC and Google Ads integration, Slack/Telegram alerts. The most-recommended self-hosted tracker. (2.2k★, GPL-3.0)
• serposcope — Long-running self-hosted rank monitor (Java) with multi-region, proxy, and captcha support. Legacy but battle-tested. (755★, GPLv3) ⚠️ archived
• Seo-Panel — Multi-site SEO control panel (PHP + MySQL) with rank tracking, audits, backlink monitoring, and white-label reports for agencies. (138★, GPL-3.0)

Analytics & Log Analysis

Self-hosted Web Analytics

• plausible — Lightweight, cookieless, privacy-first analytics. (29.7k★, AGPL-3.0)
• matomo — Self-hosted Google Analytics alternative. First-party data, compliance-friendly. (22k★, GPL-3.0)

Log & Server Analysis

• goaccess — Real-time terminal log analyzer for Nginx/Apache. Watch Googlebot crawls, 404s, and bandwidth from raw logs — a technical SEO workhorse. (21.1k★, MIT)
• OpenSearch — Search engine for large-scale log and clickstream queries, including crawl-behavior analysis. (13.9k★, Apache-2.0)

GSC Data Extraction

• google-search-console-export-all — Bulk CSV export of Search Console data, bypassing the 1,000-row UI limit. (12★)
• gsc-hub — Local self-hosted multi-account hub for Google Search Console: all properties in one table, aggregated queries and pages, per-site SEO analytics. (22★, MIT)

SERP & Keyword Research

SERP APIs & Scrapers

• openserp — Self-hosted SERP API with browser-rendered Google results. For SEO and automation. (1.5k★, MIT)
• clauneck — Scrapes emails and social accounts from web pages, built for lead research. (206★, MIT)

Keyword & Data Toolkits

• advertools — Online-marketing productivity and analysis library: crawling, SERP analysis, keyword processing. (1.5k★, MIT)

GEO & AI Search Visibility

The newest category. These tools measure and improve how sites appear in AI answers, not just blue links.

Agent Skills & Prompt Libraries

• claude-seo — Universal SEO skill for Claude Code: 25 sub-skills and 18 sub-agents covering audit, content, and technical work. (25.2k★, MIT)
• geo-seo-claude — GEO-first SEO skill for AI coding assistants, focused on AI-search optimization. (11.4k★, MIT)
• seomachine — Claude Code workspace for producing long-form, SEO-optimized content end to end, from keyword to published draft. (7.6k★, MIT)
• open-seo-mcp-skills — Free SEO MCP server plus skills for Claude: keyword research, rank tracking, audits. Speaks the protocol your agent already uses. (8.4k★, MIT)
• notfair-plugin — Open-source SEO, GEO, and marketing skills for AI agents. (4.1k★, MIT)
• gtm-engineer-skills — Claude Code skill for AEO/GEO: instrument your site so AI engines cite it, from a tag-management angle. (1.3k★, MIT)
• codex-seo — Codex-first sibling of the claude-seo suite: 26 workflows and 24 TOML agents for technical SEO. (894★)
• seo-audit-skill — Agent skill that runs a Python + LLM two-layer audit on any URL: robots, sitemap, canonicals, H1, schema, PSI. (776★, MIT)
• fire-your-seo-agency — One skill that audits and optimizes SEO, AEO, and GEO — every acronym the AI-search era has coined. (987★, MIT)
• seo-ops — Agent skill that fetches a URL and returns a crawler's-eye pass/fail report on the SEO fundamentals. (986★)
• Seo-Promt-Master — Google's SEO documentation turned into an AI prompt library. (567★, MIT)
• Akii — Claude Code plugin with 12 skills and 5 agents for site audits, content plans, schema markup, and link checks. (79★, MIT)

GEO Platforms & Auditors

• GEOFlow — GEO content engineering and multi-site distribution system. (4k★, Apache-2.0)

• geo-optimizer-skill — AEO & GEO audit toolkit: run the checks, get a prioritized fix list for AI-search visibility. (1.3k★, MIT)

• geolook — End-to-end GEO implementation: status analysis, diagnosis, and reporting. (799★, MIT)

• GEORank — GEO ranking platform from the GEOFlow author: track how sites surface in generative-engine answers. (528★, Apache-2.0)

• elmo — Open-source AEO/GEO platform: measure and improve how your site shows up in AI answers. (546★, MIT)

• notra — GEO monitoring that asks ChatGPT, Claude, and Gemini the questions your buyers ask, then tracks who gets cited. (256★, AGPL-3.0)

• AutoGEO — Research-grade GEO framework (ICLR'26): automatically learns which content edits move generative-engine rankings. (233★, MIT)

• searchstack-aeo — Open-source AEO/GEO/SEO stack for AI-native websites. (112★, MIT)

• CiteLadder — Self-hosted tracker of how ChatGPT, Gemini, Claude, and AI Overviews answer buyer questions, with the brands named and pages cited; includes an MCP server. (4★, AGPL-3.0)

• Traclux — Self-hosted GEO workbench: generate probes with CSSM-HI, execute them against a configured model, and inspect saved answers and brand analysis. (0★, Apache-2.0)

llms.txt Infrastructure

• llms-txt — The llms.txt proposal itself, by Answer.ai: a markdown map that helps language models use your site. The convention most GEO tools write for. (2.7k★, Apache-2.0)
• llmstxt-generator — Firecrawl's generator that turns any website into llms.txt + llms-full.txt. Unmaintained but still the simplest path. (539★)

Framework & CMS Integrations

React & Next.js

• next-seo — SEO plugin for Next.js: meta, Open Graph, JSON-LD handled declaratively. (8.5k★, MIT)

PHP, WordPress & Laravel

• wordpress-seo — Yoast SEO for WordPress, the plugin that runs a large share of the web. (2k★)
• laravel-seo — SEO handling for Laravel applications. (871★, MIT)
• the-seo-framework — Lightweight, automated SEO plugin for WordPress. (491★, GPL-3.0)

Static Site Generators

• jekyll-seo-tag — Jekyll plugin adding metadata tags for search engines and social. (1.7k★, MIT)
• astro-seo — SEO component for Astro. (1.4k★, MIT)

Other Frameworks

• meta-tags — SEO meta tags for Ruby on Rails. (2.8k★, MIT)
• nuxt-seo — Fully equipped technical SEO and AEO for Nuxt. (1.5k★, MIT)
• svelte-seo — SEO meta tags for Svelte/SvelteKit. (564★, MIT)

Indexing & Sitemaps

• google-indexing-script — Script that gets your site indexed on Google fast, via the Indexing API. (7.7k★, MIT)
• next-sitemap — Sitemap and robots.txt generator for Next.js. (3.8k★, MIT)
• laravel-sitemap — Sitemap generation for Laravel. (2.6k★, MIT)
• jekyll-sitemap — Sitemap plugin for Jekyll. (981★, MIT)

CLI Toolkits

• zens-ink — Maintained by this organization. Zero-dependency Python CLI with 22 tools: keyword research, SERP difficulty scoring, technical site audit, and a 16-dimension GEO score. On PyPI as zens-ink. Ships 9 installable agent skills (npx skills add ZensInk/zens-ink-seo-package) covering keyword research, difficulty, intent, audits, competitor gaps, rank tracking, Reddit mining, and GEO readiness. (54★, MIT)

Other Curated Lists

• awesome-seo (bmpi-dev) — Google SEO research and traffic monetization resources. (2.8k★, MIT)
• search-engine-optimization — Checklist-style collection of SEO resources. (2.8k★, MIT)
• awesome-seo-tools (serpapi) — Curated list of SEO tools, includes commercial ones. (1.1k★)
• awesome-seo (teles) — General curated list of SEO links. (886★)

Recommended Stacks

No single open-source tool replaces Semrush or Ahrefs — the moat there is the backlink index and search-volume data. But execution-layer work (audits, crawling, rank tracking, first-party analytics) is mature. A combined stack covers most daily needs. The honest boundary: for competitive backlink mining, keep one paid Ahrefs/Semrush read-only account for data, and let open source handle execution and your own data.

Small sites / indie sites

• SerpBear (rank tracking) + seonaut (audits) + Matomo or Plausible (analytics) + lighthouse-ci (CI checks)

Agencies

• Seo-Panel (multi-site management) + SerpBear + GSC bulk export (google-search-console-export-all) + seonaut for recurring crawls

Developers / AI workflows

• zens-ink or RustySEO as the base + scrapy for custom crawls + goaccess for raw logs + seo-audit-skill for LLM-assisted audits

Contributing

PRs welcome — see CONTRIBUTING.md for criteria and the entry format. Self-promotion is allowed but disclose it in the PR, like everyone else does.

License

CC0-1.0 — use this list however you want.

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Maintained by ZensInk — a zero-dependency, free-tier-first SEO toolkit for indie builders.