Competitor Keywords & Keyword Gap — Semrush/Ahrefs Alternative

Find the Google keywords your competitors rank for and you don't. Compare your site with up to five competitors and get one row per keyword with every competitor's position side by side, an opportunity score from 0 to 100, and a quick-win flag for keywords where you sit on page two and a competitor holds the top three.

The same actor also lists every keyword any site ranks for and finds your organic competitors. 88 countries, no Semrush or Ahrefs subscription, and you pay per row.

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Why use this actor?

• One row per keyword, not one per pair. With three competitors you get one row for "check backlinks", showing { "semrush.com": 2, "ahrefs.com": 1 } next to your own position. You don't have to join three exports yourself.
• Sorted by what is worth doing. Every gap row carries an opportunityScore built from search volume, keyword difficulty, CPC and how many competitors already rank. The best opportunities come first.
• Quick wins called out. Keywords where you rank 11-20 and a competitor ranks 1-3 are flagged with isQuickWin, and listed first if you want.
• Brand terms left out. "semrush login" is not a keyword moz.com can win. Keywords containing any compared site's name are dropped, and the log tells you how many.
• No competitor list needed. Leave it empty and the three sites that share the most keywords with yours are picked for you. YouTube, Reddit and other giants that share keywords with everyone are skipped.
• Pay for rows you get. Filters run before the data is fetched, and the row limit is also what we request, so rows you filtered out are never billed.

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Overview

This actor is for SEO teams, agencies, content strategists and founders who want competitor keyword data without a monthly SEO-suite seat. It reads Google organic ranking data from DataForSEO Labs for the country and language you choose.

It writes to one dataset with a type on every row:

type	Produced by	One row per
gap	Keyword gap mode	keyword where a competitor beats you
ranking	Rankings mode	keyword a site ranks for
competitor	Competitors mode	competing site
overview	Every mode	site looked up (keyword counts, traffic, traffic value)

The Console shows a separate table view for each type.

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Supported inputs

The actor works from domains, not URLs. Anything around the domain is removed, so https://www.moz.com/blog?ref=x becomes moz.com. Subdomains are kept as given: blog.hubspot.com is analysed as that subdomain.

Mode	domain	competitorDomains
Keyword gap	your site	0-5 competitors (empty = top 3 picked for you)
Rankings	first site	up to 24 more sites
Competitors	your site	not used

Not supported: single-page (URL-level) analysis, paid search (ads) keywords, and countries without Google ranking data (the Country list only shows the 88 that have it).

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Use cases

Who	What they do with it
Content teams	Turn missing gap keywords into the next quarter's article plan
SEO agencies	Run a gap for a prospect against their three biggest rivals for a sales deck
In-house SEO	Work through isQuickWin rows: pages already on page two that need a push
Founders	See which sites Google treats as your real competitors, which are not always the ones you expect
PPC teams	Find high-CPC keywords competitors get for free through organic rankings
Data teams	Feed rankings for a portfolio of sites into a dashboard or warehouse

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How it works

1. You give a domain, an optional competitor list, a country and a row limit.
2. The actor checks your spending limit and trims the request to what it can pay for, before anything is fetched.
3. It looks up each site's ranking footprint (the overview row).
4. For a gap, it fetches what each competitor ranks for that you don't, and what you both rank for, filtered by volume and the competitor's position.
5. It merges everything into one row per keyword, drops brand terms and keywords you already lead on, scores the rest and saves them best first.

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Input configuration

Field	Type	Default	What it does
mode	string	gap	gap, rankings or competitors
domain	string	required	The site to analyse, e.g. moz.com
competitorDomains	array	[]	Gap: up to 5 competitors. Rankings: up to 24 extra sites
country	string	us	Two-letter country code with Google ranking data
language	string	auto	Leave empty for the country's main language
maxKeywords	integer	500	Rows per site (rankings), gap rows (gap, at least 50) or competitors (max 100). 1-3,000
minSearchVolume	integer	0	Skip keywords with fewer monthly searches
maxCompetitorPosition	integer	20	Gap only: a competitor must rank at or above this position
excludeBrandTerms	boolean	true	Drop keywords containing a compared site's name
includeQuickWins	boolean	true	Gap only: list quick wins first

Keyword gap against named competitors

{
    "mode": "gap",
    "domain": "moz.com",
    "competitorDomains": ["semrush.com", "ahrefs.com"],
    "country": "us",
    "maxKeywords": 500,
    "maxCompetitorPosition": 10
}

Keyword gap, competitors picked for you

{ "mode": "gap", "domain": "moz.com", "minSearchVolume": 100 }

Rankings for several sites

{
    "mode": "rankings",
    "domain": "backlinko.com",
    "competitorDomains": ["neilpatel.com"],
    "maxKeywords": 1000,
    "minSearchVolume": 100
}

Find competitors in the UK

{ "mode": "competitors", "domain": "moz.com", "country": "gb", "maxKeywords": 25 }

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Output overview

A gap row has your position (null when you are not in the top 100), the best competitor's position and page, every competitor's position in competitorPositions, how many of them rank, the keyword's volume, CPC, difficulty and intent, and the score and quick-win flag. gapType is missing when you don't rank at all and behind when you rank below a competitor.

A ranking row has the site's position, ranking URL and page title, the change since the last check, estimated monthly traffic and what that traffic would cost in ads, the keyword's metrics, and the SERP features shown for the keyword.

A competitor row has how many keywords the competitor shares with your site, that overlap as a share of your keywords, its average position on them, and its own total keywords and traffic.

An overview row per site gives total ranked keywords, top-3, top-10 and page-two counts, estimated traffic, traffic value, and keywords gained and lost.

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Output samples

Real rows from runs on 2026-10-28, US market. Trimmed where marked.

Gap row (moz.com vs semrush.com and ahrefs.com)

{
    "type": "gap",
    "keyword": "check backlinks",
    "gapType": "behind",
    "opportunityScore": 73,
    "isQuickWin": true,
    "yourDomain": "moz.com",
    "yourPosition": 14,
    "yourUrl": "https://moz.com/link-explorer",
    "bestCompetitor": "ahrefs.com",
    "bestCompetitorPosition": 1,
    "bestCompetitorUrl": "https://ahrefs.com/backlink-checker",
    "competitorsRanking": 2,
    "competitorsChecked": 2,
    "competitorPositions": { "semrush.com": 2, "ahrefs.com": 1 },
    "searchVolume": 90500,
    "cpc": 7.17,
    "keywordDifficulty": 51,
    "searchIntent": "informational",
    "competitionLevel": "LOW",
    "trendYearlyPct": 812,
    "country": "us",
    "language": "en"
}

Ranking row (backlinko.com, trimmed)

{
    "type": "ranking",
    "domain": "backlinko.com",
    "keyword": "reddit popularity",
    "position": 2,
    "url": "https://backlinko.com/reddit-users",
    "title": "Reddit User and Growth Stats (Updated)",
    "previousPosition": 4,
    "positionChange": "up",
    "estimatedTraffic": 14661
}

Competitor row (moz.com, UK, trimmed)

{
    "type": "competitor",
    "domain": "moz.com",
    "competitor": "semrush.com",
    "sharedKeywords": 3112,
    "overlapPct": 57.2,
    "avgPositionOnShared": 10.6,
    "trafficOnShared": 30514,
    "competitorTotalKeywords": 23290,
    "competitorTotalTraffic": 400289
}

Overview row (moz.com, trimmed)

{ "type": "overview", "domain": "moz.com", "rankedKeywords": 22778, "top10Keywords": 7249, "estimatedTraffic": 261386 }

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Key output fields

Gap: keyword, gapType, opportunityScore, isQuickWin, yourPosition, yourUrl, bestCompetitor, bestCompetitorPosition, bestCompetitorUrl, competitorPositions, competitorsRanking, competitorsChecked

Rankings: domain, keyword, position, url, title, previousPosition, positionChange, estimatedTraffic, trafficValueUsd, serpFeatures, isFeaturedSnippet

Competitors: competitor, sharedKeywords, overlapPct, avgPositionOnShared, trafficOnShared, competitorTotalKeywords, competitorTotalTraffic, competitorTrafficValueUsd

Keyword metrics (gap and rankings): searchVolume, cpc, keywordDifficulty, searchIntent, competitionLevel, trendYearlyPct

Overview: rankedKeywords, top3Keywords, top10Keywords, page2Keywords, estimatedTraffic, trafficValueUsd, newKeywords, lostKeywords

Every row: type, country, language

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Pricing

Pay per event, no subscription:

Event	Price	When
Run start	$0.02	once per run
Site lookup	$0.02	per site looked up (yours plus each competitor)
Ranked keyword	$0.002	per ranking row
Gap keyword	$0.003	per gap row
Competitor	$0.005	per competitor row

overview rows are included in the site lookup. A gap of moz.com against two competitors returning 500 keywords costs $0.02 + 3 × $0.02 + 500 × $0.003 = $1.58. 1,000 ranked keywords for one site cost $2.04.

If your maximum cost per run can't cover everything you asked for, the actor fetches only the rows it can bill and says so in the log. If it can't cover even one row (50 rows for a keyword gap), it stops before charging anything.

Free Apify plan: 100 rows per run, one site in rankings mode, one competitor in a gap, 5 runs per 24 hours. Prices are the same.

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FAQ

What does "missing" vs "behind" mean?

missing: at least one competitor ranks and you are not in the top 100. behind: you rank, but at least one competitor ranks higher. Keywords where you beat every competitor are left out, because they are not a gap.

How is the opportunity score calculated?

Search volume (log scale) counts for 40%, ease (100 minus difficulty) for 25%, the share of compared competitors that rank for 20%, and CPC for 15%. The result is rounded to 0-100. It is a sorting aid, not a forecast.

Where does the data come from?

From DataForSEO Labs, which tracks Google's top 100 organic results for a large keyword database in each country. Positions and traffic are estimates from that database, refreshed every few weeks, and will differ somewhat from what Semrush or Ahrefs show.

Why did my competitor list come back different from what I expected?

When you leave competitorDomains empty, competitors are picked by how many keywords they share with you in the chosen country. That is Google's view of your competition, and it can include publishers and tools you don't sell against. Name competitors yourself to compare with specific sites.

Why are some keywords with my brand missing?

excludeBrandTerms (on by default) drops keywords containing the name of any compared site, such as "moz pro" or "ahrefs pricing". Turn it off to keep them.

Can I analyse a single page instead of a whole domain?

No. The actor works at domain or subdomain level.

Does it cover paid search (Google Ads) keywords?

No, organic results only.

Why did a site come back with no rows?

There is no ranking data for it in the chosen country and language. Its overview row will have null counts, and the run's status message names it. Try the country where the site's audience is.

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Support

Found a bug or want a feature? Open an issue on the Issues tab.

Additional services

Need a scheduled weekly gap report, a different export shape, or this data joined with your own? I build custom versions. Open an issue or message me through Apify.

Explore more scrapers

• Keyword Search Volume, CPC & Difficulty: Google and Bing volume, CPC and difficulty for up to 1,000 keywords per run. Size the gap keywords you found here.
• Ahrefs Scraper: Domain Rating, backlinks, referring domains and organic traffic.
• Semrush Scraper: authority score, traffic, backlinks and top sites for a domain.
• Similarweb Scraper: traffic, rank, visits and audience for a list of domains.
• SEO Intelligence Suite: DR, traffic, AI-search visibility and Google presence in one call.

Full list at apify.com/memo23.

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🤖 For AI Agents & LLM Apps

Compact reference for agents calling memo23/competitor-keywords through the Apify MCP server or the Apify API.

Purpose: Google organic competitor research from DataForSEO Labs: keyword gap (one row per keyword, every competitor's position side by side), ranked keywords per site, and organic competitors.

Minimal input (tested):

{ "mode": "gap", "domain": "moz.com", "competitorDomains": ["semrush.com"], "maxKeywords": 50 }

Output: rows tagged by type. gap: keyword, gapType (missing|behind), opportunityScore, isQuickWin, yourPosition, bestCompetitor, bestCompetitorPosition, competitorPositions {domain: position|null}, searchVolume, cpc, keywordDifficulty, searchIntent. ranking: domain, keyword, position, url, positionChange, estimatedTraffic, trafficValueUsd, searchVolume. competitor: competitor, sharedKeywords, overlapPct, avgPositionOnShared. overview: one per site, rankedKeywords, top10Keywords, estimatedTraffic.

Behaviors an agent should know:

• Always set maxKeywords. Gap and ranking rows are billed per row ($0.003 / $0.002), plus $0.02 per run and $0.02 per site.
• Empty competitorDomains in gap mode picks the top 3 competitors itself, which adds 3 site lookups.
• Gap rows come sorted best first: quick wins first (unless includeQuickWins is false), then by opportunityScore.
• Positions are Google top-100 only; yourPosition: null means not in the top 100.
• A site with no data still costs its lookup and returns an overview row with null counts.
• The run stops at the caller's maximum cost and fetches only what it can bill.

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⚠️ Disclaimer

This Actor is an independent tool and is not affiliated with, endorsed by, or sponsored by Semrush Holdings, Inc., Ahrefs Pte. Ltd., Google LLC or DataForSEO. All trademarks mentioned are the property of their respective owners. Semrush and Ahrefs are named only to describe what kind of tool this is an alternative to.

The data comes from a licensed third-party SEO data provider and covers public Google search results only. It contains no personal data and nothing from behind any login. Rankings, traffic and volumes are estimates. Users are responsible for using the output in line with applicable law and their own contractual obligations.

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SEO Keywords

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