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17 research tools

SEO tools

Type a keyword, a domain or a page, pick a country (and a city or state where it helps), press Enter. Everything the tool shows loads together.

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Keyword research tools

Find keywords, check how hard they are, see who ranks and what your competitors rank for that you do not.

  • A magnifying glass over a keyword card, ringed by a difficulty gauge, a volume bar chart and a globe: keyword analysis.

    Keyword analysis tool

    In the app: Keyword overview

    Difficulty, volume, traffic potential, volume by country, keyword ideas and the live top 10 for any keyword, in any country, state or city.

  • A seed card growing into a tree whose branches end in dozens of keyword cards, like a keyword generator.

    Keyword generator

    Free to try, no accountIn the app: Keyword ideas

    Matching terms, related searches, questions and Google suggestions from one seed keyword, with volume, difficulty, intent and trend.

  • Keyword cards on a conveyor belt sorted into bins of rising height beside a gauge, for checking keyword difficulty.

    Keyword difficulty checker

    Free to try, no account

    Difficulty of up to 1,000 keywords at once, from 0 (easy) to 100 (hard), sorted into what you can win now and what needs more links first.

  • A tall stack of search result slabs behind a desktop monitor and a phone, under a magnifying glass: a SERP checker.

    SERP checker

    Free to try, no account

    The live top 10 to top 100 for any keyword on desktop or mobile, in any country, state or city, with every result’s authority, links and traffic.

  • Two website panels facing each other across a chessboard with binoculars and flags: SEO competitor analysis.

    SEO competitor analysis

    In the app: Competitors

    Organic competitors of any domain, the keyword gap with any of them, and the sites that rank most for a list of keywords.

  • Two overlapping round platforms of keyword cards, with the cards only one side holds glowing: a keyword gap.

    Keyword gap analysis

    In the app: Keyword gap

    Keywords a competitor ranks for that a site does not, and the keywords both share, with volume, difficulty and positions side by side.

Website and backlink tools

Size up any website: crawl it for technical issues, see its traffic, authority and links, one page in depth, and the links your competitors have.

  • A website block with a clipboard of check marks, beside tiles for a rising chart, a chain link and a target: a full SEO audit.

    SEO audit tool

    In the app: SEO audit

    Traffic, rankings, keywords, backlinks and competitors of any domain, with findings and the opportunities to act on first.

  • Site audit

    A free SEO crawler: up to 500 pages of any site, 117 technical checks, status codes and links, and every fix exported for a coding agent.

  • A website window surrounded by floating trend, donut and bar chart tiles and a globe, for website SEO analysis.

    Website SEO analysis

    In the app: Domain overview

    Traffic and its value, keywords, links, authority, ranking spread, top keywords, top pages and competitors of any domain.

  • Website towers of different heights with streams of visitors flowing into them, comparing website traffic.

    Website traffic checker

    Free to try, no account

    Estimated Google traffic of up to 100 websites side by side: organic and paid visits and keywords, and each site’s share of the group.

  • Cylinders rising from short to tall, wrapped in glowing link lines and small cubes: website authority growing.

    Website authority checker

    Free to try, no account

    Domain Rating, referring domains and backlinks of up to 10 sites side by side, to see how strong a site is next to its competitors.

  • A web page under a scanning light while a small robot checks items on a clipboard: an on-page SEO audit.

    On-page SEO audit

    In the app: Page analyser

    Authority, links and traffic of any page, its title, description and headings checked, the keywords it ranks for and its strongest backlinks.

  • A central website block linked by glowing cables and bridges to a ring of smaller sites, like a backlink map.

    Backlink checker

    Totals, monthly history, strongest backlinks, referring domains, anchors, top linked pages and link intersect for any domain or page.

  • Server blocks cabled to a shared cluster of sites while one block gets its first orange cable: a backlink gap.

    Backlink gap analysis

    In the app: Backlink gap

    The websites linking to your competitors but not to you, most competitors first, with their authority: a ready list of link building prospects.

AI search and local SEO tools

See where Google’s AI Overviews and AI assistants cite you, and how you rank on Google Maps across a city.

  • A search bar under a glowing AI answer panel linked to source cards, one card highlighted: an AI Overview check.

    AI Overview checker

    Free to try, no account

    Check up to 100 keywords at once for Google AI Overviews and every other SERP feature: which sites each AI Overview cites, and whether yours is one.

  • Four chat bubbles drawing lines down to stacks of source cards, one shared source lit up: AI visibility.

    AI visibility checker

    Ask ChatGPT, Gemini, Claude and Perplexity the same question with web search on, and compare the sources each one cites, in order. Is your site among them?

  • A city map divided into a grid with map pins of different heights in each square: local rank checking.

    Local rank checker

    Google Maps rankings for any keyword across a grid around a city: the top 20 businesses at every point, and any business’s rank in each cell.

Search data

Start with $5 of free search data

Keyword, ranking and backlink data in OpenSEO comes from YepAPI. Sign up there and new accounts get $5 in free credit, for a limited time. That is enough to try every tool before you spend anything.

  1. 1

    Sign up at YepAPI

    New accounts get $5 in free credit, for a limited time.

  2. 2

    Copy your API key

    It is on your YepAPI dashboard once you sign in.

  3. 3

    Paste it into OpenSEO

    During account setup, or later in Settings. Every tool works from there.

Sign up at YepAPISetup guide

The free credit is YepAPI’s limited-time offer and may end. After it, you pay YepAPI per lookup at its price. OpenSEO lists every call with its cost and a monthly limit caps what you spend. See pricing

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