CrawlCheck vs Serpstat: 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.

Serpstat is an all-in-one SEO and search-marketing platform that brings keyword research, competitor analysis, rank tracking and site audits into one affordable tool. Used by over 1.1 million marketers, it's designed to streamline the whole SEO workflow — from finding keywords to fixing technical issues — without paying for several separate subscriptions.

What is Serpstat?

Serpstat is a cloud marketing-analytics platform that covers the core jobs of SEO in one place: discovering keywords and their difficulty, analyzing what competitors rank for, tracking your own positions, auditing your site for technical problems, and clustering keywords by topic. It's backed by a huge index — billions of keywords, backlinks and SERP results — so its data is deep enough for serious work.

Who it's for

Serpstat serves digital marketing agencies, e-commerce businesses, SaaS companies, SMBs and media platforms, plus SEO professionals and consultants. It's a strong fit for teams that want capable, comprehensive SEO tooling at a friendlier price than the biggest enterprise suites.

Key features

• Keyword research across 230 countries with difficulty, volume and PPC cost
• Competitor analysis: keywords, traffic, backlinks and paid strategies
• Rank tracker for mobile and desktop across search engines
• Site audit that finds and prioritizes technical SEO issues
• Keyword clustering by thematic relevance
• Website traffic checker for any domain
• API and data solutions for integrations
• Browser extensions for Chrome, Firefox, Opera and Edge

Everything SEO in one tool

Serpstat's main appeal is breadth. Rather than paying for a separate keyword tool, rank tracker, backlink checker and site auditor, you get all of it under one login — and the modules share data, so research flows naturally into tracking and optimization. For agencies and SMBs especially, consolidating the SEO stack into one platform saves both money and the friction of switching tools.

Learn from your competitors

Competitor analysis is a Serpstat strong suit. You can reveal the keywords a rival ranks for, estimate their traffic, inspect their backlinks and see their paid-search strategy — turning competitors into a roadmap. Spotting the terms they win that you don't is one of the fastest ways to find realistic opportunities, and Serpstat makes that gap analysis straightforward.

Fix what's holding you back

Ranking isn't only about content; technical health matters too. Serpstat's site audit crawls your site, surfaces issues and prioritizes them so you tackle the highest-impact problems first, with automated scheduling to keep monitoring over time. Combined with keyword clustering that organizes terms into topical groups, it helps you structure a site that both search engines and users navigate well.

Deep data, easy interface

Serpstat pairs a large index — 1.5B domains, 8.6B keywords, 529B backlinks and 2.2B SERP results — with an interface users describe as intuitive, so the depth doesn't come at the cost of usability. An API and data solutions let bigger teams pull Serpstat's data into their own reporting and projects, and browser extensions bring metrics into everyday browsing.

Global reach, local precision

Serpstat's keyword and SERP data spans 230 countries, so it works whether you're optimizing for a single local market or campaigns across many regions. You can track rankings on both mobile and desktop and compare positions across search engines, which matters as mobile-first indexing and regional differences reshape results. For agencies juggling clients in different countries, that breadth — from one platform — removes the need for separate region-specific tools.

Why choose Serpstat

For agencies, e-commerce, SaaS and SEO professionals who want comprehensive SEO tooling without a premium price tag, Serpstat is a well-rounded choice. Its all-in-one coverage, strong competitor analysis, technical site audits and deep data — wrapped in an approachable interface with a free trial — make it a practical platform for running real SEO campaigns end to end.