* Google Keyword Planner: This free tool from Google allowed you to research keywords and see their search volume, competition, and suggested bids.
* Moz: Moz was one of the most popular SEO tools on the market, offering a variety of features including keyword research, backlink analysis, and site audits.
* SEMrush: SEMrush was another popular SEO tool that offered similar features to Moz, as well as competitive intelligence and social media marketing tools.
Now:
* Ahrefs: Ahrefs is now considered the leading SEO tool on the market, offering a comprehensive suite of features including keyword research, backlink analysis, site audits, and competitive intelligence.
* SEMrush: SEMrush has continued to grow in popularity and now offers a wide range of features beyond SEO, including content marketing, social media marketing, and PPC advertising tools.
* Moz: Moz is still a popular SEO tool, but it has lost some market share to Ahrefs and SEMrush in recent years. However, it still offers a solid suite of features, including keyword research, backlink analysis, and site audits.
* SpyFu: SpyFu is a competitive intelligence tool that allows you to see what your competitors are doing in terms of SEO, paid advertising, and social media marketing.
* Majestic: Majestic is a backlink analysis tool that provides you with detailed information about the backlinks to your website and your competitors' websites.
In addition to these tools, there are a number of other SEO tools available that can help you to improve your website's ranking in search results. These tools can be used for a variety of tasks, such as keyword research, content optimization, and backlink building.