Question: I'm looking for a platform that provides access to a large library of keywords and competitive insights to inform my content strategy.

If you want a full-fledged platform to help you develop your content strategy with a big repository of keywords and competitive analysis, AlphaRank is a good option. This all-in-one SEO tool uses machine learning and proprietary algorithms to give you access to more than 100 million keywords and detailed competitive analysis. It also comes with features like real-time keyword ranking tracking, SEO-optimized content generation and market analysis, so it's good for everyone from enterprise businesses to freelancers.

Another good option is Scalenut, an AI-based SEO and content marketing platform that handles everything from content creation to optimization. It offers tools for keyword clustering, competition analysis and real-time SEO score audits that can help you dramatically improve your organic growth strategy. Scalenut is geared for SEO strategists, content creators and agencies, with a range of pricing plans to accommodate different customers.

Moz is another top pick, with a broad suite of SEO tools for keyword research, competitive analysis, link research and rank tracking. With its Moz Pro, Moz Local and STAT tools, Moz can help you measure and optimize your online presence. It offers a range of free SEO tools and a 30-day free trial to let you try its full suite.

If you want a more streamlined content marketing experience, check out Keyword Insights. This AI-based service simplifies keyword discovery, clustering and content brief generation so you can find content gaps and develop a new content strategy more easily. It offers flexible pricing and a 4-day free trial, so it's good for content marketers and SEO specialists.