Quick verdict: Keyword Insights vs manual SERP clustering

Quick verdict: Keyword Insights vs manual SERP clustering
I tested this on a real 4,000-keyword list for a finance content plan.

Keyword Insights (live SERP clustering)
➕ Grouped 4,000 keywords into 380 article-level clusters by actual SERP overlap in ~20 min
➖ Credits cost ~$58 for that run

Manual clustering
➕ Free
➖ Two days of spreadsheet hell, and I'd have grouped by intuition, not real SERP overlap

The case: the SERP-based clusters merged 3 keyword groups I'd have written as separate articles (Google clearly saw them as one). We wrote 380 pieces instead of a planned ~520 — avoiding ~140 cannibalising thin pages. The site hit 60k clicks/mo with a leaner content count.

Best for: Keyword Insights when your list is big enough that manual errors compound.
Price-vs-value: $58 to prevent 140 wasted articles is the best ROI on this list.

Pick it for any list over ~1,000 keywords.
Skip it for 50-keyword projects — cluster those by hand.