CheckThat.ai

What is CheckThat.ai?

CheckThat.ai is a free, open AI-visibility benchmarking platform built by GrowthX, a venture-backed ($29.1M raised, Series A closed January 2025) AI-marketing company founded in 2024 by former Deepgram CMO Marcel Santilli (CEO) and engineer Daniel Lopes (CTO). It publishes a continuously updated public index - as of August 2026, 5,983 brands across 1,990 B2B software categories, drawn from more than 2.6 million tracked AI responses - showing how brands are mentioned and recommended when buyers ask ChatGPT, Claude, Perplexity and Google AI Mode about a category. A free workspace lets any team track up to 50 of its own custom prompts alongside more than 100,000 pre-built industry prompts already in the index, with no credit card required. Paid tiers add depth - more tracked prompts, longer historical retention - but publish no price anywhere on the site; the only next step offered is "Book a Demo," which leads to GrowthX's own paid consulting arm rather than a self-serve upgrade. Note: a different, unrelated product also called CheckThat AI (at checkthat-ai.com, a fact-checking and claim-normalization tool) shares a near-identical name but has no connection to this platform.

What does CheckThat.ai do?

Visitors can browse the open index for free without creating an account: search any of the 1,990 tracked B2B categories or 5,983 named brands to see aggregate AI-visibility rankings drawn from CheckThat's own database of 2.6 million-plus AI responses (1.6 million-plus of which the site describes as freely accessible per month). Creating a free workspace account adds custom prompt tracking: up to 50 brand-specific prompts monitored with daily response snapshots across ChatGPT, Claude, Perplexity and Google AI Mode, on top of the pre-built industry prompt library. The workspace also surfaces day-over-day historical tracking and category-level positioning context, so a team can see not just whether it is mentioned but how that has moved over time. Paid tiers are described only as adding "depth" - more custom prompts and longer historical retention - with no tier names, feature breakdowns or prices published anywhere on the site; the paid-plan call to action is "Book a Demo," which routes into GrowthX's separate consulting offering rather than an in-product self-serve upgrade.

How CheckThat.ai works

1. 1Anyone can search the open index - 1,990 B2B categories, 5,983 named brands - without creating an account, to see aggregate AI-visibility standings drawn from CheckThat's 2.6M+ tracked AI responses.
2. 2Creating a free workspace account unlocks custom prompt tracking: up to 50 brand-specific prompts, checked daily across ChatGPT, Claude, Perplexity and Google AI Mode, plus access to 100,000+ pre-built industry prompts.
3. 3The workspace shows day-over-day historical tracking and category-level positioning, so a team can watch its AI-visibility trend rather than a single snapshot.
4. 4Wanting more tracked prompts, longer history, or strategic guidance leads to the platform's only paid-tier CTA, "Book a Demo" - which hands off to GrowthX's separate, unpriced consulting offering rather than an in-product upgrade.

Who is CheckThat.ai for?

• Marketing and SEO teams that want a genuinely free way to see how their category performs in AI answers before committing budget to a paid AEO/GEO monitoring tool.
• Small teams or solo operators that want real custom-prompt tracking across ChatGPT, Claude, Perplexity and Google AI Mode without a subscription.
• Buyers open to a consulting relationship with GrowthX, since the only path beyond the free workspace is booking a demo with GrowthX's own team.

Key features

• Open AI-Visibility Index: A public benchmark - 5,983 brands across 1,990 B2B software categories, built from 2.6M+ tracked AI responses - browsable by anyone without signing up.
• Free Custom Prompt Tracking: A free workspace account tracks up to 50 custom prompts with daily response snapshots across ChatGPT, Claude, Perplexity and Google AI Mode.
• Pre-Built Industry Prompt Library: More than 100,000 pre-built industry prompts are already indexed, so a new workspace has category context before writing a single custom prompt.
• Historical Trend Tracking: The workspace records day-over-day AI response history, so a team can see whether its category position is improving or slipping rather than a single snapshot.

What are CheckThat.ai's use cases?

• Benchmarking a category before buying a paid tracker: A marketing team browses the free open index for its own category to see who currently wins AI answers, before committing budget to a paid AEO/GEO monitoring tool.
• Free entry-level brand monitoring: A small team with no monitoring budget tracks up to 50 brand-specific prompts across four major AI engines at no cost, using the free workspace tier.
• Qualifying into GrowthX's paid GEO/AEO program: A company that wants deeper strategy, more tracked prompts or longer history books the platform's only paid-tier CTA, which leads into GrowthX's separate consulting offering.

Why use CheckThat.ai?

• A genuinely free, self-serve entry point: 50 custom prompts tracked daily across four AI engines, plus a public benchmark of 5,983 brands and 1,990 categories, with no credit card required.
• Backed by GrowthX, a venture-funded ($29.1M raised) AI-marketing company with named founders and a real operating history, not an anonymous free tool.
• The open index itself is useful even without an account: browsing category and brand pages surfaces AI-visibility context that most competitors in this index keep behind a login.

Pros & cons

CheckThat.ai pricing

Free workspace: up to 50 tracked custom prompts, 100,000+ pre-built industry prompts, and access to 1.6M+ AI answers per month, no credit card required. Paid tiers add more prompts and history but publish no price anywhere on the site - the only CTA is "Book a Demo," which leads to GrowthX's separate consulting offering.

• Free$0 / month
• PaidCustom

See current pricing on checkthat.ai ↗Compare CheckThat.ai alternatives →

CheckThat.ai review

CheckThat.ai's free tier is the most generous self-serve entry point in this index: a genuinely open benchmark of 5,983 brands and 1,990 categories anyone can browse, plus a free workspace that tracks 50 custom prompts a day across four major AI engines with no credit card. It is backed by GrowthX, a real, venture-funded ($29.1M) team, not an anonymous side project. The tradeoffs are the ones a brand-new, monetization-light product usually carries: no published price for anything beyond the free tier, no independent reviews yet, and a narrower four-engine named list than some funded rivals that also track Gemini, Copilot or Grok. A strong first stop for a team that wants free category benchmarking before spending on a paid tracker; a weaker fit for a buyer that wants a fully-priced, independently reviewed product today.

Surfaced because our own listings already cite checkthat.ai repeatedly as a third-party review-platform source for other vendors' pricing and reviews pages (Brandlight, Rankscale, AIclicks, Rank Prompt) - it earned a listing of its own once its underlying product (a free AI-visibility workspace, not just a review directory) was verified directly. Its benchmark numbers (brands/categories/responses tracked) are live counters on the vendor's own site and will keep moving; the figures here are what the page showed on 2026-08-10.

Frequently asked questions