Another option is Scalenut. The tool covers all the bases of content creation and optimization, from finding keyword clusters to optimizing content for search engine ranking. It includes a keyword planning tool, NLP key terms and competition research, and real-time SEO score auditing and optimization. Scalenut is good for SEO strategists, content creators and agencies that want to improve their content strategy and organic growth.
For a free and powerful tool, Ubersuggest is a good option. It offers unlimited keyword research, lets you analyze competitors' SEO strategies and offers hundreds of keyword ideas. Ubersuggest also offers backlink analysis and content ideas, so you can build a more complete SEO and content marketing strategy.
If you want a tool that fits into your existing workflow, Frase is a good option. It offers a single workflow for researching, outlining, writing and optimizing content based on a set of keywords. Frase includes tools like AI-powered outline generation, SEO-optimized copywriting and a text editor that compares your content to competitors, all integrated with Google Docs and WordPress.