Competitor Keyword Research: How to Find the Keywords Your Rivals Rank For

Competitor keyword research is the process of identifying the search terms that drive organic traffic to competing websites. Rather than building a keyword strategy from scratch, competitor keyword research gives you a validated list of keywords that already drive real traffic in your market — your competitors have already done the work of ranking for them, proving the keywords are worth targeting.

The strategic value is efficiency: instead of guessing what your audience searches for, you examine what's already working in your competitive landscape. Keywords your competitors rank for but you don't represent the clearest opportunities for traffic growth.

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Identifying Your SEO Competitors

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Your SEO competitors are not necessarily your direct business competitors. They are the websites that rank for the keywords you want to rank for — which may include informational sites, directories, review platforms, and industry publications alongside direct competitors.

Finding SEO competitors:

Search your primary target keywords in Google. The websites consistently appearing in positions 1–5 are your SEO competitors for those terms, regardless of whether they compete with your business directly.

Using tools to identify competitors:

• Ahrefs: Enter your domain in Site Explorer → Organic search → Competing domains. Shows sites with the highest keyword overlap.
• Semrush: Enter your domain → Organic Research → Competitors. Shows organic competitors ranked by traffic share.
• Google Search Console: The "Search performance" report shows which URLs you rank near and who else appears for your queries.

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Build a shortlist of 5–10 competitor domains that consistently appear for your target keywords. These are the sites whose keyword data is most relevant to your strategy.

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Finding Keywords Your Competitors Rank For

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Tool: Ahrefs Site Explorer:

Enter a competitor's domain → Organic keywords tab. This shows every keyword the site ranks for, with position, search volume, keyword difficulty, and traffic estimate. Filter by:

• Position 1–10 (top-ranking opportunities)
• Volume above a minimum threshold (e.g., 100+/month)
• Keywords you don't already rank for

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Tool: Semrush Organic Research:

Enter a competitor's domain → Organic Research → Positions tab. Similar data to Ahrefs with the addition of intent classification for each keyword.

Manual Google audit:

Site search (site:competitor.com) reveals their content pages. Review their blog, service pages, and resource sections to identify topic areas they've covered that you haven't.

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Keyword Gap Analysis

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The most structured approach to competitor keyword research is gap analysis — identifying keywords competitors rank for that you don't. Both Ahrefs and Semrush have dedicated gap analysis tools:

Ahrefs Content Gap:

Enter your domain as the target and up to five competitor domains as comparison. The tool shows keywords that two or more competitors rank for but your site doesn't. These are the highest-priority gaps — keywords validated by multiple competitors and clearly absent from your coverage.

Semrush Keyword Gap:

Similar functionality — enter your domain alongside competitor domains to see keywords they share that you're missing. Semrush allows filtering by intent type, making it easy to isolate commercial and transactional gap keywords.

Interpreting gap data:

Not all gap keywords are worth targeting. Prioritize gaps where:

• Multiple competitors rank (validated demand)
• The keyword has commercial or transactional intent (higher revenue value)
• Keyword difficulty is within reach of your current authority
• The keyword is relevant to your actual service or product offering

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Analyzing Competitor Top Pages

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Beyond individual keywords, analyze which content pages drive the most traffic for competitors. This reveals content formats and topics that are working in your market.

Ahrefs Top Pages:

Enter a competitor's domain → Site Explorer → Top pages. Shows pages ranked by organic traffic estimate, with the primary keyword for each page. This answers: what content is driving the most traffic for this competitor?

What to look for:

• Blog posts and guides driving significant traffic (content gaps you could fill)
• Service pages ranking for commercial keywords (confirms these terms convert)
• Resource pages or tools attracting links and traffic (link magnet opportunities)
• Seasonal or trending content performing well in your market

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Competitor Keyword Tactics

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Targeting competitor brand terms:

Users searching "[Competitor] alternatives" or "[Competitor] vs [your brand]" are actively evaluating options. Creating comparison pages targeting "[Competitor] alternative" or "tools similar to [Competitor]" captures this high-intent research traffic.

Improving on competitor content:

When a competitor ranks well for a keyword you want, examine their ranking page. If it's thin, outdated, or incomplete, you have an opportunity to create superior content for the same intent. Content that comprehensively addresses a query outperforms existing shallow content — but it must genuinely be better, not just longer.

Targeting competitor weaknesses:

Review search console or third-party data to identify keywords where a competitor ranks in positions 5–15. These are keywords they're not fully optimizing for — opportunity zones where well-targeted content can outrank them without needing to displace a page in position 1.

Monitoring competitor movements:

Set up alerts for competitor domain changes (Ahrefs Alerts, Semrush Position Tracking) to be notified when competitors publish new content or gain significant ranking improvements. Proactive monitoring prevents competitors from building an unchallenged position in new keyword territories.

Blakfy performs competitor keyword research for clients — identifying the specific keyword gaps between client sites and market-leading competitors, and building prioritized content plans to close those gaps and capture organic traffic from validated demand.

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Frequently Asked Questions

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How many competitors should I analyze?

Start with 3–5 direct SEO competitors — the sites that consistently rank for your most important keywords. Analyzing too many dilutes the insights; too few misses important keyword opportunities. Once you've exhausted the gap analysis for your primary competitors, expand to 2–3 secondary competitors to find additional topics.

What if my competitors rank for thousands of keywords I don't?

Prioritize rather than panic. Filter the gap list by business relevance (keywords you can genuinely create content for), search intent alignment (commercial or informational matches your strategy), and difficulty (keywords within your current authority range). Focus on the top 20–50 gap opportunities initially and build from there. Trying to close all gaps simultaneously produces mediocre content at scale — closing priority gaps with excellent content is more effective.

Should I copy competitor content topics or differentiate?

Match the topic category but differentiate on approach, depth, or angle. If a competitor has a "beginner's guide to SEO," you need to cover SEO basics (because there's proven demand), but your version should offer something genuinely different — better structure, more current information, additional examples, or a more specific focus. Pure copying produces weak content that won't outrank the original.

How do I track if my competitor keyword research is working?

Track your ranking positions for the gap keywords you targeted over a 3–6 month period using Ahrefs Rank Tracker, Semrush Position Tracking, or Google Search Console. Growth in impressions and clicks for these keywords confirms the strategy is producing results. Measure share of voice — the percentage of total possible clicks for your keyword set that your site captures — compared to competitors over time.