IndexGPT is a highly rated Shopify app for getting a store noticed by AI assistants (4.9★ on the Shopify App Store, checked Oct 14, 2026). If you are comparing it with other options, the practical differences are what the app does to your store, and how you pay. This guide compares IndexGPT and Arenza using IndexGPT's own Shopify App Store listing and website, checked on October 14, 2026.
The short version
- IndexGPT is a toolkit of technical signals and tracking: an AI SEO score with an action plan, llms.txt, indexing, robots.txt checks, brand signals, and on higher plans prompt tracking, sentiment, a schema builder and an AI blog writer. It charges a monthly subscription from $16.
- Arenza checks what ChatGPT and Google AI Mode say about your buyers' questions, drafts product-page fixes you approve, and shows which Shopify orders came from AI assistants. The Shopify app is $0 a month, with a commission only on orders it brings.
At a glance
| IndexGPT | Arenza | |
|---|---|---|
| Install | Shopify App Store ("Built for Shopify" badge) | Shopify App Store, no code |
| Pricing | "From $16/month. Free trial available." | $0/month; commission only on orders it brings; first 3 qualifying orders free on every store |
| Plans | Essentials $16/month ($128/year); Premium $45/month ($432/year); Enterprise $345/month | One Shopify app plan; portal plans exist for other businesses (see arenza.ai/pricing) |
| Free trial | 3-day free trial on Essentials and Premium | First 3 qualifying orders free |
| Technical signals | llms.txt, Agents.md, llms-full.txt, robots.txt analysis, instant indexing | Structured data among the fixes it drafts |
| Tracking | AI Prompt Tracker and AI Sentiment Analysis on Premium and above | Checks what ChatGPT and Google AI Mode say about buyer questions |
| Content | "Smart Blogger" and "Content Creator" on Premium and above | Drafts buyer guides and product-page fixes you approve |
| AI traffic and orders | "Brand Signals & AI Traffic": track how AI models drive traffic | Shows which Shopify orders came from AI assistants like ChatGPT |
| Human help | Dedicated account manager and monthly strategy call on Enterprise | Not covered in this comparison |
What IndexGPT does well
IndexGPT has strong reviews and a wide toolkit. The listing shows a 4.9 rating from 146 reviews, and it carries Shopify's "Built for Shopify" badge. Its features include an "AI SEO Score & Action Plan," IndexNow submissions for faster indexing, robots.txt checks so AI crawlers are not blocked, automatic llms.txt generation, and "Brand Signals" to tell AI models about your brand. Premium adds an AI prompt tracker, sentiment analysis, a schema markup builder and a blog writer.
Reviewers on the listing repeatedly praise the support, and the listing is available in seven languages, including English, German, French, Spanish, Simplified Chinese and two kinds of Portuguese. For a store that wants a clear to-do list and a set of technical switches turned on for a small monthly fee, IndexGPT is easy to understand and easy to justify.
Where Arenza differs
You pay for results, not a subscription. The Shopify app is $0 a month. The first 3 qualifying orders are free on every store, and after that it charges a commission only on orders it brings. IndexGPT's plans are fixed monthly fees, which is predictable but means you pay whether or not it brings orders. Which you prefer depends on how you budget.
It starts from what AI actually says. The Shopify app checks what ChatGPT and Google AI Mode say about your buyers' questions.
It drafts page fixes for you to approve. Arenza drafts best-for statements, FAQs, review proof, comparisons, shipping and returns details, structured data and buyer guides for product pages. You approve what goes live. It can also suggest clearer titles and descriptions, but nothing changes until you approve it, and you can undo any change.
It shows AI-driven orders. It shows which Shopify orders came from AI assistants like ChatGPT. Stores using Arenza already see orders arriving from AI assistants, nearly all from ChatGPT.
Billing is a separate, smaller set of orders. Only qualifying orders are billed, meaning fully paid orders whose buyer's last visit lands on an Arenza product page or a guide Arenza published.
Where IndexGPT goes further: it offers more technical files (llms.txt, Agents.md, llms-full.txt), instant indexing and a human growth team on Enterprise. Where its listing mentions assistants, it names ChatGPT, Gemini, Claude, Perplexity and Grok; our app's checks cover ChatGPT and Google AI Mode.
Who should pick which
Pick IndexGPT if:
- You want a fixed, low monthly price, starting at $16.
- You want technical signals (llms.txt, indexing, robots.txt) switched on and monitored.
- You want an AI blog writer or a human growth team (Enterprise).
- You want prompt tracking and sentiment analysis in the same app as your technical SEO.
Pick Arenza if:
- You would rather not pay a monthly fee, and only pay when the app brings orders.
- You want page-level fixes drafted for you to approve, based on what AI says about your buyers' questions.
- You want AI-driven orders shown in your Shopify data.
Try both? They overlap on structured data and AI visibility but they are built differently, so you could use one to set up technical signals and the other to improve product pages. If you do, review the commission terms in the Arenza app first.
Sources (checked Oct 14, 2026)
- IndexGPT on the Shopify App Store (pricing, plans, rating, features)
- IndexGPT features
- IndexGPT pricing
- Arenza pricing