Keyword Grouping Software: 4 Tools Compared

The right keyword grouping tool depends on the size of your list, your budget, and how much you need to know about how Google treats each term. Here are four options we checked in November 2026. InstaRank is our own product, so we say where it falls short. Prices come from each vendor's page and can change, so confirm them before you buy.

Quick comparison

InstaRank Keyword Grouper

The InstaRank keyword grouper is free and needs no account. Paste up to 100 keywords, review the groups and suggested intent, and export a CSV.

Limits: it does not compare live search results. When AI is unavailable, it falls back to shared words, so it cannot match synonyms. The tool tells you which method it used. Treat the result as a draft.

Keyword Insights

Keyword Insights combines clustering with content briefs and writing tools. Its pricing page lists a Basic plan at $58/month with 10,000 credits and a Professional plan at $99/month with 20,000 credits. Clustering costs 1 credit per keyword. A 7-day trial costs $1.

Limits: there is no free plan, and the extra content features may be more than you need if you only want groups.

SE Ranking Keyword Grouper

SE Ranking's grouper lets you set the minimum number of matching URLs and the clustering method. Higher accuracy settings put fewer searches into each group. Groups are named after the term with the highest search volume, when volume data is available.

Limits: its product page lists plans from €87.20/month, and checking search volume adds $0.005 per query. It makes most sense if you already use SE Ranking.

KeyClusters

KeyClusters checks each keyword in Google and groups terms that share at least 3 of the top 10 ranking pages. You buy credit packs rather than a subscription: one credit covers one keyword, and credits do not expire.

Limits: its pricing page does not mention a free tier, and it focuses on grouping rather than wider SEO work.

How to choose

• A short list and no budget: start with a free tool, then check the largest groups by hand.
• A large list, now and then: pay-as-you-go credits avoid a monthly fee.
• Regular client or content work: a subscription can make sense if you will use the other features.
• Precision matters most: choose a method that compares live search results.

Whichever you pick, review the output. Our guide on how to group keywords for SEO shows how to check groups against the search results and map them to pages.