Ubersuggest is one of the best SEO tools like Semrush as it offers you a ton of useful features to find better keywords, perform site audits, analyze backlinks, and so on.
Ahrefs is best for monitoring backlinks. Ahrefs is mainly used to analyze a website’s link profile, keyword rankings, and SEO health.
SEO Powersuite is a great tool for people undertaking SEO at no cost. It is free Semrush alternative, it comes with powerful features to improve your ranking on search engines.
Google Keyword Planner is a great tool for suggesting effective keywords. It is ideal for getting keywords for creating Google ads.