Screaming Frog SEO Spider

CrawlSEO is an open-source, self-hosted SEO monitoring dashboard for founders. It combines Google Search Console analytics for keywords, pages, clicks, impressions, click-through rate, and position changes with 28-day comparisons; a concurrent site crawler that handles up to 2,000 pages, assigns a health score, identifies 16 issue types, scores content, and provides per-page audit and remediation data; Core Web Vitals monitoring through PageSpeed Insights; historical rank tracking; SEO opportunity detection; alerts; and CSV export. Optional keyword research and backlink analysis use DataForSEO with a bring-your-own-key setup, while Google Autocomplete provides a free fallback for keyword suggestions. The included Model Context Protocol server exposes 10 tools for Claude Code, Claude Desktop, and Cursor. Connected AI agents can query SEO data, run crawls, inspect crawl issues and performance, and find opportunities. The application is built with Next.js, TypeScript, PostgreSQL, Prisma, and NextAuth.js, and is distributed under the MIT license for local or Docker Compose deployment with Google OAuth and a database. It is described as free and open source, with self-hosting intended to keep site data under the operator's control.

OpenSEO is an open-source SEO tool developed as a self-hostable alternative to Semrush and Ahrefs. It provides workflows for keyword research, rank tracking, competitor insights, backlink analysis, site audits, and AI visibility, using a DataForSEO API key for the underlying SEO data. The project exposes an MCP server and reusable agent skills that let agents such as Claude Code, OpenClaw, and Hermes access SEO data and perform guided SEO tasks. It can be self-hosted with Docker for personal use or Cloudflare for internet-facing use across devices or teams; a hosted version is also available, with pricing described as pay-as-you-go for API usage and a subscription option.

Fire Your SEO Agency is a Claude Code skill that audits and optimizes websites across five search-visibility lanes: SEO for Google and Bing crawling, AEO for AI answer boxes such as Google AI Overviews and Bing Copilot, GEO for generative engines such as ChatGPT, Perplexity, and Claude, LLMO for how language models represent a brand, and NEO for Naver Search and AI Briefing. Its operating procedure audits sites without JavaScript, checks rendering, sitemaps, metadata, structured data, server-side rendering, machine-readable content, brand consistency, crawler policies, and Naver requirements, then proposes and implements fixes, creates intent-focused landing pages and citation-ready content structures, and schedules remeasurement. It is distributed as a Claude Code plugin or project/personal skill and is licensed under the MIT License.

Surfer (formerly SurferSEO) is an SEO and content optimization platform that analyzes search data to guide on-page optimization, content planning, and organic growth. The platform includes keyword research, SERP analysis, a content editor, and AI-assisted content tools for drafting and optimization.

SpyFu is a competitive intelligence platform for search marketing that provides PPC and SEO keyword research, competitor ad history, backlink data, and rank tracking. It is operated from the SpyFu website and used to analyze competitors' paid and organic search strategies.