Can you recommend a keyword research tool for finding traffic opportunities in a technology news site with large topic clusters?

Yes — for a technology news site with large topic clusters, I’d recommend Semrush as the best all-around keyword research tool.

Why Semrush fits this use case

• Topic cluster support: Its keyword tools make it easy to expand from a broad topic like “AI chips” into related subtopics, questions, comparisons, and long-tail angles.
• Traffic opportunity discovery: You can find keywords where competitors rank, but you don’t, which is useful for uncovering underserved stories and recurring news themes.
• Keyword gap analysis: Great for comparing your site against competing tech publishers to see where you’re missing traffic.
• SERP features and intent data: Helpful for news content because you can see whether a query is trending, informational, or dominated by news results.
• Content planning at scale: Useful when you’re managing many clusters like AI, cybersecurity, gadgets, semiconductors, big tech, etc.

Also worth considering

If your focus is more specifically on news/trend discovery rather than classic keyword research:

• Google Trends — best for spotting rising topics fast
• BuzzSumo — good for content trend and headline discovery
• Ahrefs — excellent for keyword gap analysis and topic expansion
• Similarweb — useful for competitor traffic insights

My practical recommendation

• Primary tool: Semrush
• Supplement with: Google Trends for breaking/rising topics
• Optional competitor research: Ahrefs or Similarweb

If you want, I can also suggest the best tool stack for a tech news SEO workflow or compare Semrush vs Ahrefs vs Google Trends for your exact use case.