Competitor Keyword Research: How to Steal Your Rivals Best Keywords

Competitor keyword research is the practice of discovering which keywords drive traffic to your rivals — and then targeting those same keywords (and the intent behind them) with better content. It's one of the highest-leverage SEO activities available, because your competitors have already done the hard work of proving which keywords are worth targeting. Your job is to do it better.

This guide covers the full methodology: from finding competitor keywords to executing a strategy that captures their traffic.

Why Competitor Keyword Research Works

Traditional keyword research starts from scratch: brainstorm topics, expand with tools, filter by volume and difficulty. This process can take days and still miss important opportunities.

Competitor keyword research starts from results. A competitor ranking in position 3 for a keyword with 2,000 monthly searches has already proven two things: the keyword has traffic, and it's rankable without being a domain authority giant. Both of those signals — proven traffic AND proven attainability — are exactly what you're looking for.

The risk of traditional keyword research is investing in keywords that turn out to be dead ends: too competitive, wrong intent, or less traffic than volume estimates suggested. Competitor research reduces this risk significantly.

Step 1: Identify the Right Competitors to Spy On

Not all competitor keywords are worth stealing. The right competitors to analyze are:

Topically aligned: Their site covers the same subjects as yours. A travel blog's keywords are useless to a SaaS company.

Similar domain authority: A DR 30 site's successes are more replicable for another DR 30 site than a DR 90 giant's. You want to find keywords where sites similar to yours in authority are ranking.

Multiple SERP overlaps: The more keywords you share with a competitor, the more relevant their keyword portfolio is to your strategy.

Use Semrush's Organic Research Competitors tab or Ahrefs Competing Domains to identify 3-5 competitors with the highest keyword overlap with your domain. Sort by "Competition Level" in Semrush.

For the broader competitor identification process, see How to Find Competitors guide.

Step 2: Extract Competitor Keyword Rankings

For each target competitor, export their full ranking keyword list:

In Semrush: 1. Enter competitor domain → Organic Research → Positions tab 2. Filter: Position 1-20 (top 2 pages), Volume > 50 3. Export CSV

In Ahrefs: 1. Enter competitor → Organic Keywords 2. Filter: Position 1-20, Volume > 50 3. Export

For a competitor with 50,000+ ranking keywords, this export can be overwhelming. Apply additional filters:

Volume 100-10,000 (sweet spot for most sites)

KD 0-50 (realistic targets)

Intent: commercial or informational (depending on your content type)

URL filter: focus on their blog/resource section specifically (most replicable content type)

Step 3: Run a Keyword Gap Analysis

A keyword gap analysis systematically finds keywords where competitors rank but you don't — your missing opportunities.

Semrush Keyword Gap: 1. Enter your domain + 3-5 competitors 2. Select "Missing" keywords filter (competitors rank in top 20, you don't rank at all) 3. Apply: Volume > 100, KD < 50 4. Sort by Volume descending

Ahrefs Content Gap: 1. Site Explorer → Organic Search → Content Gap 2. Enter 3-5 competitors in top rows, your domain in "But the following target doesn't rank for" 3. Filter: Top 10 intersect (keywords where all competitors rank in top 10) 4. Export

The intersection of keywords where multiple competitors rank is most valuable — if three competitors all rank for the same term, that's strong evidence it's a worthwhile content investment.

Step 4: Identify Their Best-Performing Pages

Beyond individual keywords, look at which competitor pages generate the most organic traffic. These pages represent their most successful content investments — and reveal what content formats work best in your niche.

In Ahrefs: Site Explorer → Top Pages → sort by Organic Traffic estimate

In Semrush: Organic Research → Pages → sort by Traffic %

For each high-traffic competitor page:

What keyword does it primarily target?

What is the content format? (Guide, list, tool review, comparison, infographic?)

How long is it?

Does it earn rich results (FAQ boxes, How-To steps)?

How many backlinks does it have?

These answers define the content quality bar you need to clear. If their top page is a 3,000-word definitive guide with 150 backlinks, a 500-word article won't unseat it. But a more comprehensive, more up-to-date guide might.

Step 5: Classify Stolen Keywords by Strategy

Not all competitor keywords require the same response. Classify your gap list into four buckets:

Bucket A — Create New Content: Keywords where you have no article and competitors have good, comprehensive content. You need to write a better version. Required elements: equal or greater depth, fresher data, better formatting for the SERP intent.

Bucket B — Expand Existing Content: Keywords where you have an article tangentially covering the topic but not specifically targeting this keyword. Update your existing article to add a dedicated section on this keyword. Add it to the title if relevant.

Bucket C — Quick Wins (Positions 11-30): Keywords where you already rank but on page 2-3. You're in striking distance. Competitor analysis shows you what the top 10 results include that yours doesn't. Targeted content updates can push you to page 1.

Bucket D — Long-Term Authority Plays: High-volume, high-difficulty keywords where competitors have significant backlink advantages. Don't ignore these — add them to a 6-12 month authority-building content plan. Start building topical context through related long-tail content now.

Step 6: Reverse-Engineer Competitor Backlinks on Target Keywords

For your highest-priority "stolen" keywords, go one step further: look at who links to the competitor's ranking article specifically.

In Ahrefs, enter the competitor's URL → Backlinks tab → filter for recent links to that specific page.

These linking sites have demonstrated they link to content about this topic. Reach out with your better, more current version. This "Skyscraper" approach — create the best resource, then reach out to linkers — is one of the highest-ROI link building strategies available.

For the full link building methodology, see Link Building guide.

Turning Competitor Keyword Research Into a System

Run this process quarterly: 1. Export top competitor keyword rankings 2. Run keyword gap analysis 3. Classify gaps into the four buckets 4. Create/update content for Bucket A and B (fastest wins) 5. Build 6-month roadmap for Bucket D 6. Track rankings for target keywords in SE Ranking or Semrush

Over time, this systematic approach compounds: every piece of content you create based on competitor research targets proven demand, reducing the risk of publishing content that never ranks.

For the full SEO competitor analysis methodology, see SEO Competitor Analysis guide. For keyword research fundamentals, see Keyword Research complete guide.