# CheckThat.ai — A free, open AI-visibility benchmark spanning ~5,983 brands, built by venture-backed marketing company GrowthX - paid tiers add depth but publish no price, gated behind a demo call.

> Source: CitedIndex — https://citedindex.com/checkthat-ai (structured, researched, re-verified)
> Facts last verified: 2026-08-10

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.

| Fact | Value |
| --- | --- |
| Website | https://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. |
| API | No |
| Not for | buyers who want published pricing, a wider named engine list (Gemini, Copilot, Grok), or an independently-reviewed, established track record |

## Pricing

| Tier | Price |
| --- | --- |
| Free | $0 / month |
| Paid | Custom |

## Verdict

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.

## How it works

1. Anyone 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. Creating 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. The 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. Wanting 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 it's 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.

## Strengths and weaknesses

- ✓ A genuinely large free tier: up to 50 custom prompts tracked daily across four AI engines, 100,000+ pre-built industry prompts, and stated access to 1.6M+ AI answers per month, with no credit card required - a bigger self-serve free allocation than most trackers in this index.
- ✓ An open, public benchmark - 5,983 brands across 1,990 categories, built from 2.6M+ tracked AI responses - that anyone can browse before signing up; most competitive AI-visibility data in this index is gated behind a login.
- ✓ Built and operated by GrowthX, a venture-backed company ($29.1M raised, Series A closed January 2025) founded by former Deepgram CMO Marcel Santilli and engineer Daniel Lopes - real operator credibility rather than an anonymous side project.
- ✗ No independent reviews exist yet: GrowthX's own comparison of AI-visibility tools states CheckThat has zero reviews on G2, Capterra or TrustRadius and no published case studies with quantified results, since it only recently launched.
- ✗ Paid tiers publish no price, tier names or feature breakdown anywhere on the site; the only paid-plan CTA is "Book a Demo," which leads to GrowthX's separate consulting offering rather than a self-serve checkout inside the product.
- ✗ Only four AI engines are named as tracked - ChatGPT, Claude, Perplexity and Google AI Mode - narrower than several competitors in this index that also track Gemini, Microsoft Copilot, Grok, DeepSeek or Meta AI by name.

## 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.

## 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.

## Sources

- https://checkthat.ai/
- https://checkthat.ai/launch
- https://growthx.ai/learn/comparisons/best-ai-visibility-tools
- https://www.linkedin.com/posts/marcelsantilli_big-news-we-just-launched-checkthatai-activity-7425228862378156033-fIAF
- https://tracxn.com/d/companies/growthx-ai