The best SEO audit tools vary depending on specific needs and budget. SEOptimer is a top choice for small businesses, offering a dynamic SEO audit tool at budget-friendly pricing. Small SEO Tools is another option for those looking for free auditing apps, with nearly 300 tools available. Screaming Frog offers a robust free version of its premium product, while SE Ranking provides flexible audit grouping and clean data visualizations. Semrush stands out as a comprehensive SEO suite with rich reporting and analysis categories. Ahrefs is ideal for technical auditing, breaking down site structure and providing recommendations for improvement. Clearscope focuses on on-page optimization, offering detailed auditing and keyword research tools. ContentKing excels in real-time monitoring, providing a highly responsive interface and proprietary Importance metric. While Google's SEO audit tools are also valuable, they were not included in this roundup to maintain diversity. Ultimately, the best tool depends on individual needs and priorities.