If you're looking for a tool to find trending keywords with real-world monthly volume data, Keyword Catcher is a good choice. It also offers SERP analysis, volume and trend data that can help you spot trending keywords. The service is geared for niche site operators, marketers and content creators and offers AI-created content outlines. It uses a pay-as-you-go pricing system so you can use it on a modest budget.
Another good tool is Rankify, an AI-based SEO keyword research tool that offers search volume data along with color-coded keyword difficulty scores. It lets you research keywords in bulk and has tools to segment your keyword list and manage multiple projects. Rankify is geared for SEO agencies, freelancers and enterprise teams, and it offers a 7-day free trial with 10 searches.
If you're looking for a tool that's more geared toward topic clusters and long-tail keywords, Nichely offers AI-based research tools that can help you build a strong topical map. It offers detailed volume and competition data for keywords, so it's good for content creators and niche website publishers. Nichely charges on a pay-as-you-go basis with credits you can buy in various sizes.