Lucid Engine

What is Lucid Engine?

Lucid Engine is a web-based Generative Engine Optimisation (GEO) tool that measures a brand’s visibility inside AI-generated answers. It runs a set of strategic buying prompts through answer engines, records whether your brand appears, which competitors are recommended instead and which pages the models cite, then turns the gaps into prioritised action briefs. The Monitoring plan covers ChatGPT, Perplexity and Google AI with weekly runs, while the homepage also names Gemini and Claude among the engines it follows.

Lucid Engine is run by LUCID ENGINE SAS, a company listed in France, and its founder and chief executive is Marine Depoorter, who has a cybersecurity engineering and strategy background. The current site positions the product for B2B SaaS brands, while some directory listings describe an earlier e-commerce focus with Shopify and WooCommerce links. The company reports more than 2,400 founders on its waitlist or mailing list. When we checked in October 2026 the free checker, $29 snapshot and $89 Monitoring plan were all live.

Key Features

• AI visibility mapping: Lucid Engine scores how often and how prominently your brand appears in answers from ChatGPT, Perplexity and Google AI. Heatmaps and a baseline score show where you are strong, missing or being displaced.
• Competitor displacement tracking: Lucid Engine finds the prompts where AI engines recommend a rival instead of you. It then suggests fixes for each lost prompt, which helps you focus on the comparisons that affect buying decisions.
• Truth Layer and citation audit: Lucid Engine’s Truth Layer shows which pages and claims the models use as sources, along with the cited source mix. Knowing what AI trusts tells you which proof pages to strengthen or create.
• Content gap analysis: Lucid Engine identifies the terminology and evidence language models need before they will describe your product accurately. The output points to specific pages or documentation to update, rather than general SEO advice.
• Buying intent and value estimate: Lucid Engine tags prompts by buying intent and estimates the business value at risk when you are absent. That framing helps marketers explain GEO work to finance or leadership teams in commercial terms.
• AI readiness audit and llms.txt generator: Lucid Engine’s Monitoring plan includes an AI readiness audit and a generator for an /llms.txt file. A release note injector and publication verification check that your fixes actually reach the models.
• Drift detection and run history: Lucid Engine keeps a history of weekly runs and flags drift when model answers change. You can tie visibility shifts to model updates or your own content releases instead of guessing.

Pros

• Free check with no signup: Lucid Engine’s free checker returns a baseline score, a category gap and your first competitor without an account. You can see whether AI visibility is a problem before spending anything.
• One-off option for small budgets: Lucid Engine sells a $29 one-shot snapshot with the full prompt and competitor view, Truth Layer and action briefs. Founders who only need a single diagnosis avoid a monthly subscription.
• Built for AI answers, not rankings: Lucid Engine measures citations and recommendations inside AI responses rather than blue-link positions. Neura Market notes this focus, which fills a gap left by traditional SEO rank trackers.
• Turns scores into tasks: Lucid Engine converts findings into action briefs that name the next proof to publish. Teams get a prioritised to-do list instead of a dashboard that only reports a falling number.
• Tracks change over time: Lucid Engine’s weekly runs, run history and drift detection show whether fixes are working. That matters because AI answers change with model updates, so a single audit goes stale quickly.

Cons

• Only three engines on Monitoring: Lucid Engine’s $89 Monitoring plan covers ChatGPT, Perplexity and Google AI only. Claude, Gemini and DeepSeek are listed as add-ons marked coming soon, so brands needing those engines must wait.
• Tight limits on the main plan: Lucid Engine’s Monitoring plan includes one brand, one market and 60 strategic prompts. Extra markets and prompts are listed as future add-ons without prices, which limits multi-region or agency use for now.
• Pricing differs across directories: Lucid Engine’s directory listings disagree, with TAAFT citing plans from $19 and Neura Market listing $55 to $549 tiers. These look like older offers, so rely only on the official pricing page.
• Young product with few reviews: Lucid Engine launched in 2026, its Trustpilot profile showed no reviews, and only one founder is named. Buyers have little independent evidence of long-term reliability or support quality yet.
• GEO results are hard to prove: Lucid Engine works in a young field where links between AI visibility scores and revenue are still being tested. Neura Market makes the same point, so treat value estimates as directional rather than exact.
• Integrations are not documented: Lucid Engine’s official site lists no integrations or API, although directories mention Shopify, WooCommerce and analytics links. Confirm any connection you need with the company before you subscribe.

Who is Using Lucid Engine?

• B2B SaaS marketing teams: Tracking whether AI engines recommend their product in buying prompts.
• Startup founders: Running the free check or $29 snapshot before investing in GEO.
• Content and SEO leads: Finding the proof pages and terminology models need.
• E-commerce brands: Monitoring how AI shopping answers describe their products.

Pricing

Lucid Engine offers a free checker, a $29 one-time snapshot and a Monitoring plan at $89 per month (official pricing page, October 2026).

Directories show older or different figures: TAAFT lists a seven-day trial and plans from $19, Indexator mentions a $19 maker plan, and Neura Market lists Discovery, Growth and Enterprise tiers from $55 to $549 a month. The official page did not show the yearly Monitoring figure, so check the toggle at checkout before you commit.

What Makes Lucid Engine Unique?

Answer-level diagnosis is what separates Lucid Engine from rank trackers that have bolted on AI features. It runs your real buying prompts, shows which competitor each engine recommends and which sources it trusts, then hands you briefs and an /llms.txt generator to close the gap and verify the fix. The $29 one-off snapshot is also unusual in a category where most tools sell only monthly subscriptions.

Compatibilities and Integrations

• Platform: Web app at lucidengine.tech, with no install required.
• AI engines: ChatGPT, Perplexity and Google AI on Monitoring; Claude, Gemini and DeepSeek planned as add-ons.
• Site outputs: An /llms.txt generator and release note injector for your own website.
• Reported integrations: Shopify, WooCommerce and analytics links mentioned by directories but not on the official site.

Lucid Engine Tutorials

Lucid Engine’s free checker gives you a first read in a few minutes.

1. Open lucidengine.tech and run the free audit with your brand and category.
2. Review the baseline score, the first competitor named and the missed-discovery signal.
3. Buy the $29 snapshot if you want the full prompt view, Truth Layer and action briefs.
4. Publish the proof pages and /llms.txt changes the briefs recommend.
5. Move to Monitoring for weekly runs and drift alerts once fixes are live.

How We Rated It

Summary

Lucid Engine suits B2B SaaS founders and marketing teams who want to know whether ChatGPT, Perplexity and Google AI recommend them, and what to publish to change that. Its main limits are three engines on the current plan, tight prompt and market caps, and a short track record with conflicting directory pricing. We rate it as a promising, affordable entry point to GEO rather than a mature enterprise platform. Run the free checker first, then buy the $29 snapshot before committing to monthly monitoring.