AI Search Optimizer & llms.txt vs IndexAI ‑ AI Discovery
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Oct 13, 2026.
The short answer
- Only AI Search Optimizer & llms.txt lists a free plan. Paid plans start at $9.90/month for AI Search Optimizer & llms.txt and $5/month for IndexAI.
- IndexAI lists 18 features AI Search Optimizer & llms.txt’s listing doesn’t mention, including AI generation, Analytics, Attribute filtering.
Head to head
Free
- · Full JSON-LD
- · Optimize up to 20 products
- · llms.txt integration
Starter Plan
- · Full JSON-LD
- · Optimize up to 1,000 products
- · llms.txt integration
Growth Plan
- · Full JSON-LD
- · Optimize up to 5,000 products
- · llms.txt integration
Pro Plan
- · Full JSON-LD
- · Optimize up to 15,000 products
- · llms.txt integration
Basic Plan
- · Automated Updates
- · Content Inventory Filtering
- · File Customization & Control
- · Index Health Monitoring
- · LLM.txt Generation
- · Premium Support
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureBuyers now ask ChatGPT "what should I buy?" — is your store in the answer? AI Search Optimizer automatically generates your llms.txt file, optimizes product metadata, and adds JSON-LD structured data — the exact signals ChatGPT, Perplexity & Google AI use to recommend products. One click. No technical skills needed. Start free with 20 products.
IndexAI helps merchants control how AI systems understand their Shopify store. The app creates and maintains an LLM.txt file that organizes products, collections, and pages into a clear, machine-readable format. This helps AI tools describe your store more accurately and reduces confusion as AI-powered search and assistants access your content.
- AI Data Structuring: Optimize product attributes for recognition
- Automatic llms.txt: Generate the standard file to guide AI crawlers.
- JSON-LD Data: Automatic updates to prevent AI hallucinations about your products
- GEO Scoring: View a real-time dashboard score of your store’s AI search readines
- Control how AI describes your store and products
- Help AI find the pages and products you want to display
- Keep AI context accurate as your catalog changes
- Reduce incorrect or outdated AI store descriptions
All the numbers
Every figure, side by side
A green dot marks the app ahead on a measured figure. Estimates, gaps and apps that leave no storefront trace never take the lead.
Adoption
| Measure |  AI Search Optimizer & llms.txt |  IndexAI |
|---|---|---|
| Detected stores | Not published | Not published |
| Net store change, 28 days | 0 | 0 |
| Stores added, 28 days | Not enough data | Not enough data |
| Big-brand share | Not enough data | Not enough data |
| Top store categories | Not published | Not published |
| Top store countries | Not published | Not published |
Reviews
| Measure | AI Search Optimizer & llms.txt | IndexAI |
|---|---|---|
| App Store rating | Not published | Not published |
| App Store reviews | Not published | Not published |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | AI Search Optimizer & llms.txt | IndexAI |
|---|---|---|
| Free plan | Yes | Not listed |
| Lowest paid monthly plan | $9.90/month | $5/month(ahead) |
| Longest free trial | 14 days | 2 days |
| Plans listed | 4 | 1 |
Listing
| Measure | AI Search Optimizer & llms.txt | IndexAI |
|---|---|---|
| Shopify category rank | #306 | #247(ahead) |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Feb 23, 2026 | Jan 21, 2026 |
| Languages | 1 | 1 |
| Developer | IA Tech | Minion |
FAQ
AI Search Optimizer & llms.txt and IndexAI: common questions
- Is AI Search Optimizer & llms.txt or IndexAI cheaper?
- Only AI Search Optimizer & llms.txt lists a free plan. Paid plans start at $9.90/month for AI Search Optimizer & llms.txt and $5/month for IndexAI. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- What features does each app list that the other doesn’t?
- AI Search Optimizer & llms.txt lists 2 the others don’t mention, such as Feed optimization, Metafields. IndexAI lists 18 the others don’t mention, such as AI generation, Analytics, Attribute filtering, Automations. A feature missing from a listing may still be supported; this compares what each App Store listing says.
- Where does this comparison’s data come from?
- Shoplist crawls Shopify storefronts to detect which apps each store runs, and reads each app’s Shopify App Store listing for reviews, pricing, features and integrations. Store counts are as of Oct 13, 2026; estimated figures are labeled.
How Shoplist compares apps
Store counts come from Shoplist’s crawl of Shopify storefronts, which detects the apps each store runs; they are as of Oct 13, 2026. Reviews, ratings, plans, features and integrations come from each app’s Shopify App Store listing. 28-day figures are labeled when estimated, and a figure that is missing or estimated never decides who leads. Read the methodology.