Serpstat

Netpeak Spider

Netpeak Spider is a downloadable desktop website crawler that audits sites for technical SEO issues, detecting over 100 problems such as broken links, duplicate content, and faulty metadata with built-in prioritization to show which issues matter most. It uses a Chromium rendering engine to crawl JavaScript-heavy pages the way Googlebot does, and it supports multi-window mode so users can run several crawl projects side by side. The tool includes an internal PageRank calculator, source code and HTTP header inspection, XML and HTML sitemap generation, and custom web scraping using CSS, XPath, or regex rules across up to 15 conditions at once. It integrates with Google Analytics and Search Console, produces white-label PDF audit reports for agencies, and reports over 150,000 users including teams at Shopify, OLX, and Reuters.

Ahrefs

Ahrefs is a search marketing platform built around a large proprietary web index, giving users tools to research keywords, analyze competitor backlinks and traffic, track search rankings, and find technical SEO issues on their own sites. Core modules include Site Explorer for competitor analysis, Keywords Explorer for search demand research, Rank Tracker for monitoring positions, Content Explorer for content and link opportunities, and Site Audit for technical SEO checks.

Semrush

Semrush is a digital marketing platform covering SEO, content, advertising, and competitive research from a single dashboard. Its keyword research draws on a database of billions of keywords, backlink analysis covers trillions of tracked backlinks, and its site audit tool flags technical SEO issues across a domain, alongside competitor traffic and market analysis covering hundreds of millions of domain profiles. Beyond traditional SEO, Semrush has added AI Visibility tools that track how brands appear in AI-generated answers from tools like ChatGPT, plus AI-powered content creation, local SEO management, advertising research, and social media planning. It's used by SEO specialists, content marketers, agencies, and enterprises, with plans scaling from a single-site starter tier up to custom enterprise pricing.

Moz Pro

Moz Pro is an SEO platform combining keyword research through Keyword Explorer, rank tracking across search engines and locations, site crawling and auditing for technical SEO issues, and competitive and SERP analysis. Newer AI-powered features analyze search intent, group keyword suggestions, and surface brand-mention insights across AI/LLM search results in addition to traditional Google rankings. Every plan includes MozBar, a browser SEO toolbar, on-page optimization grading, custom reporting for agencies and in-house teams, and access to Moz Academy's SEO training courses. Moz Pro is priced across four tiers from Starter at roughly $39/month (billed annually) up to larger-scale plans, targeting SEO professionals, agencies, and marketers who need both day-to-day SEO tools and a way to prove results to clients or leadership.

SpyFu

SpyFu is a competitive intelligence platform for search marketing that shows every keyword a domain has ranked for organically and every keyword it has bid on in Google Ads, along with historical ad copy. Marketers use it to reverse-engineer competitor SEO and PPC strategy, find keyword gaps, and track their own rankings.

SE Ranking

SE Ranking is an SEO platform that combines traditional rank tracking with keyword research, competitor analysis, backlink monitoring, and website auditing in one workspace. It also tracks brand visibility inside AI-driven search experiences like ChatGPT, Gemini, and Google AI Overviews, extending beyond classic search engine rankings. Built with agencies and growing businesses in mind, SE Ranking includes white-label reporting, an Agency Pack for client-facing work, and content tools like an AI writer and content editor. Used by tens of thousands of agencies across more than 150 countries, it positions itself as a more affordable full-suite alternative to the largest SEO platforms.