CrawlCheck vs Keyword Tool: Which Is Better in 2026?

CrawlCheck is a free GEO (generative engine optimization) audit tool that shows exactly how AI crawlers see your website. Paste any domain and get an instant report: which of 61 AI crawlers are allowed, blocked, or ignored by your robots.txt, whether your llms.txt file exists and is well formed, and whether your sitemap is healthy and discoverable.

AI search is becoming a real traffic source. Chatbots like ChatGPT, Claude, Perplexity and Google AI Overviews fetch pages before they answer, and they obey very different rules from Googlebot. A robots.txt that looks fine for classic search can silently lock out GPTBot, ClaudeBot, PerplexityBot or Google-Extended, which means your content never enters the index behind those answers.

CrawlCheck checks all of this in one scan. You get a per-crawler breakdown that separates allowed, blocked and ignored agents, a check on your llms.txt and sitemap, and a short list of concrete fixes ordered by impact. Every scan produces a shareable report link you can send to a client, a developer or your team, so the fix list turns into a work item instead of a vague warning.

The report flags the exact user-agent lines that are missing or disallow rules that are too broad, points out a missing or malformed llms.txt, catches sitemap errors such as blocked entries or a stale lastmod, and gives copy-paste snippets for the most common setups, including Cloudflare, Next.js, WordPress and plain static hosting. Each finding is labelled with a severity level so you can fix the blockers first and leave the cosmetic items for later.

The tool is built for SEO teams, content marketers, developer-facing SaaS founders and indie makers who want their pages to be cited by AI search engines, not just ranked by classic search. It runs on Cloudflare Workers, needs no account, and returns results in a few seconds. Visit crawlcheck.dev to run a free audit on your own site.

What problem it solves

A robots.txt that looks fine for Googlebot can silently lock out GPTBot, ClaudeBot, PerplexityBot and Google-Extended, so your content never enters the index behind AI answers.

Alternatives & competitors

Manual robots.txt checkers, Screaming Frog, and generic SEO audit tools that do not model individual AI crawler user-agents.

Keyword Tool is a keyword research platform that generates hundreds of long-tail keyword ideas by tapping into search-engine autocomplete — the real phrases people type. Used by content creators and Fortune 500 marketers alike, it's a popular alternative to Google Keyword Planner, surfacing terms across 16 platforms that ad-data tools often miss.

How Keyword Tool works

Rather than pulling from advertising data, Keyword Tool uses search autocomplete as its primary source — the suggestions Google, YouTube and others show as you type. Because those come from actual searches, it uncovers long-tail, intent-rich keywords competitors relying on ad tools overlook. A single search term yields 750+ suggestions, and it works across Google, YouTube, Bing, Amazon, TikTok, Instagram, Reddit and more.

Who it's for

Keyword Tool serves content creators and bloggers, SEO professionals, PPC advertisers, e-commerce businesses and marketing agencies — anyone who needs to understand what their audience is searching for. Its client list (Adobe, Microsoft, Uber, Shopify) shows it scales to large teams, but its free tier makes it just as useful for a solo blogger.

What it offers

• 750+ long-tail keyword suggestions per search term
• Free access with no account required
• 16 platforms including Google, YouTube, Amazon, TikTok and Reddit
• 190+ Google domains and 120+ languages
• Search volume, CPC and competition data (Pro)
• Historical trend data and bulk upload (up to 1,000 keywords)
• CSV/Excel export and API access
• MCP server for AI integration (Claude, ChatGPT)

Find the keywords others miss

Keyword Tool's biggest advantage is its data source. Because it mines autocomplete rather than advertising platforms, it surfaces the specific, long-tail phrases real people search — the kind that are easier to rank for and reveal genuine intent. For content marketers especially, that means discovering topics and questions competitors relying on Keyword Planner never see, which is where a lot of winnable traffic hides.

Research beyond Google

Modern audiences don't only search on Google, and Keyword Tool reflects that. It generates keywords for YouTube, Amazon, TikTok, Instagram, Reddit, the App Store and more — so a YouTuber can research video topics, an Amazon seller can optimize listings, and a social creator can find trending phrases, all from one tool. That multi-platform reach makes it useful across very different content strategies.

Reliable data and AI-ready

For those who upgrade, Keyword Tool Pro adds accurate search volume, CPC and competition scores, historical trends, bulk research and export — and the company stresses its reliability, claiming it works 99.99% of the time. It also offers an MCP server so you can pull keyword data directly into AI assistants like Claude and ChatGPT, fitting neatly into modern, AI-assisted content workflows.

Global reach, no barrier to start

Keyword Tool works far beyond English and the US: it supports 190+ Google domains and 120+ languages, so you can research keywords for almost any country or market from one place — valuable for international brands and anyone targeting non-English audiences. And because the core tool is free and needs no account, there's no barrier to getting started; you can generate hundreds of long-tail ideas immediately and only upgrade when you need hard metrics like volume and CPC.

Why choose Keyword Tool

For content creators, SEOs and marketers who want to uncover what their audience actually searches for — across far more than just Google — Keyword Tool is a practical, proven choice. Its autocomplete-based long-tail discovery, broad platform coverage, reliable Pro data and AI integration make it an effective way to find winnable keywords and build content around real search intent, starting free.