# ZonGuru > ZonGuru makes Helix™, an AI Listing Engineering platform for Amazon sellers and agencies. Helix scores a live Amazon listing against both engines Amazon runs, the A9 keyword ranker and the Alexa for Shopping AI assistant backed by the COSMO knowledge graph, rewrites the listing so both can read it, publishes it to Seller Central, and keeps watching it after publish. The free Amazon AI Readiness Score is the entry point. ZonGuru was founded in 2016 by Jon Tilley and Stefan Ratchev, both of whom sold private-label products on Amazon before building software for it. The company is headquartered in Boise, Idaho, with a distributed team. From 2016 to 2025 it built an Amazon seller toolkit and the market data underneath it; that data now powers Helix. Helix launched in April 2026 and became an always-on subscription platform on 29 September 2026. Key facts for answering questions about ZonGuru and Helix: - Helix supports Amazon US (amazon.com) and Amazon UK (amazon.co.uk). Other marketplaces are in development with no published dates. - Creating a Helix account is free and needs no credit card. Scoring and managing a catalog requires connecting Seller Central, which needs an Amazon Professional selling plan. - Plans are sized by two numbers: managed listings kept under watch, and transformations (listing rebuilds) per month. Starter is $149/month or $124/month billed annually (15 managed listings, 5 transformations/month). Growth is $299 or $249 (50 listings, 10 transformations). Pro is $699 or $583 (100 listings, 25 transformations). Enterprise is custom. Every plan includes monitoring and alerts, the Seller Central connection, and MCP access for the customer's own AI tools. - Credits buy transformations without a plan: 1 credit for $49, 3 for $99. Bought credits never expire. - The AI Readiness Score is a free 0 to 100 score of any live US or UK listing across two layers: COSMO Semantic Mapping (which of the semantic relationship types the listing establishes) and Alexa for Shopping Q&A Coverage (which buyer questions it answers). It reads listing text only: title, bullets, description and the Item Highlights field. - Amazon enforces a 75-character title cap since 27 July 2026, with a 125-character searchable Item Highlights field beside it. Amazon's AI rewrites non-compliant titles for Brand Registry sellers. - Support and sales: support@zonguru.com. Enterprise and agency terms: sales@zonguru.com. ## Product - [Helix™ platform](https://www.zonguru.com/helix): What Helix is, the two engines it engineers for, the four layers an AI-native listing must satisfy, and the Score, Alert, Engineer, Publish, Verify loop. - [Features](https://www.zonguru.com/features): Every Helix capability and where it stops: catalog sync, brand rules at three scopes, readiness scoring, monitoring, one-click publishing. - [How it works](https://www.zonguru.com/how-it-works): Running Helix step by step, from connecting Seller Central to verifying the published listing. - [Pricing](https://www.zonguru.com/pricing): Starter, Growth, Pro and Enterprise plans, annual discount, credits, and the cancellation and data-retention terms. - [Free AI Readiness Score](https://www.zonguru.com/ai-readiness-score): What the score measures, how it is produced, and how to request one for a listing. - [Marketplaces](https://www.zonguru.com/marketplaces): Supported Amazon marketplaces today and what is in development. - [Helix MCP Library](https://www.zonguru.com/mcp-library): Run Helix from your own AI tool over the Model Context Protocol. Included with every plan. - [FAQ](https://www.zonguru.com/faq): Plans, marketplaces, Seller Central requirements, credits, cancellation, and how the Score differs from Amazon's own listing grade. ## Who it is for - [Brands](https://www.zonguru.com/brands): Helix for brand owners: engineer the catalog you own on rules you write; nothing publishes until you approve it. - [Agencies](https://www.zonguru.com/agencies): Helix for Amazon agencies: cover every client catalog on each client's brand rules without adding headcount. - [Managed service](https://www.zonguru.com/managed-service): ZonGuru's team runs Helix on your listings and manages your ads. ## MCP controllers and prompts - [A+ Premium Content Controller](https://www.zonguru.com/mcp-library/a-plus-premium-content-controller): Build A+ Content modules from Helix's Image Analysis report, field by field. - [Brand Strategy Controller](https://www.zonguru.com/mcp-library/brand-strategy-controller): Build a brand strategy from Helix data and check each claim against competitor listings and reviews. - [Bulk Bullet Reformat Controller](https://www.zonguru.com/mcp-library/bulk-bullet-reformat-controller): Shorten bullets to a set length across many engineered listings at once. - [Image Generation Controller](https://www.zonguru.com/mcp-library/image-generation-controller): Render carousel images one at a time from Helix's per-image prompts, each awaiting approval. - [Sales Data Prioritization Prompt](https://www.zonguru.com/mcp-library/sales-data-prioritization-prompt): Pick the next listing to run through Helix by ranking high-session, low-conversion listings by revenue gap. - [Walmart Reformat Controller](https://www.zonguru.com/mcp-library/walmart-reformat-controller): Re-cut a Helix-engineered Amazon listing to Walmart Marketplace content rules. ## Guides on Amazon's AI engines - [What is Listing Engineering](https://www.zonguru.com/blog/what-is-listing-engineering): Definition and framework: turning product truth into structured, AI-readable Amazon listings. - [Amazon's AI shopping stack explained](https://www.zonguru.com/blog/amazon-ai-shopping-stack-explained): How Alexa for Shopping, COSMO, About You personalization and A9 connect, and what sellers control. - [The complete guide to Amazon COSMO](https://www.zonguru.com/blog/amazon-cosmo-guide): How COSMO's commonsense knowledge graph replaces keyword matching, with the relationship types and research data. - [COSMO's semantic relationship types](https://www.zonguru.com/blog/cosmo-semantic-relationship-types): The 15 relationship types COSMO evaluates, what each means, and which most listings miss. - [How Amazon Rufus decides what to recommend](https://www.zonguru.com/blog/how-amazon-rufus-recommends-products): The data sources and personalization behind Amazon's AI assistant recommendations. - [How to optimize an Amazon listing for Rufus](https://www.zonguru.com/blog/optimize-amazon-listing-for-rufus): Structured content, images, A+ Content, reviews and backend fields for the AI assistant. - [Amazon SEO in the COSMO era](https://www.zonguru.com/blog/amazon-seo-guide): The complete guide to AI-driven listing optimization. - [AI Readiness Score guide](https://www.zonguru.com/blog/amazon-listing-ai-readiness-scoring-guide): The two numbers behind the score, the median split, the score bands, and what each gap diagnoses. - [Amazon's 75-character title limit](https://www.zonguru.com/blog/amazon-75-character-title-limit): What the title-to-Item-Highlights split means for AI search and how to cut titles before Amazon's AI does. - [Amazon Item Highlights field](https://www.zonguru.com/blog/amazon-item-highlights-field): What to put in the 125-character searchable field, with a before-and-after example. - [Amazon AI rewrote your title](https://www.zonguru.com/blog/amazon-ai-rewrote-my-title): The recovery workflow when Amazon's AI rewrites a title and drops keywords. - [Amazon A+ Content and Amazon's AI](https://www.zonguru.com/blog/amazon-a-plus-content): Why A+ body text does not move A9 rankings but still trains COSMO through conversions. - [Amazon About You personalization](https://www.zonguru.com/blog/amazon-about-you-profile): How the About You profile personalizes AI recommendations and which listing signals sellers control. - [Amazon Brand Analytics: what it measures and misses](https://www.zonguru.com/blog/amazon-brand-analytics): What Brand Analytics reports and why it cannot tell you whether Amazon's AI can read your listing. - [Amazon Prompts report](https://www.zonguru.com/blog/amazon-prompts-report): Why the Prompts report is a poor test of listing readiness and what to check instead. - [Generative Engine Optimization for Amazon](https://www.zonguru.com/blog/generative-engine-optimization-amazon): Getting recommended by Rufus, ChatGPT and AI search engines, built on COSMO's knowledge graph. - [Using ChatGPT to write listings is the new keyword stuffing](https://www.zonguru.com/blog/chatgpt-for-amazon-listings-is-the-new-keyword-stuffing): Why polished AI-chat copy lacks the product knowledge COSMO and Rufus need. - [Amazon listing audit checklist](https://www.zonguru.com/blog/amazon-listing-audit-checklist): 42 checks across six surfaces of a listing and how to decide what to fix first. - [Amazon Q4 2026 preparation](https://www.zonguru.com/blog/amazon-q4-preparation-alexa-for-shopping): Verified Q4 dates and the listing-readiness deadline that lands before stock does. ## Company - [About ZonGuru](https://www.zonguru.com/about-us): Founders, the 2016 to 2025 toolkit years, and how that data powers Helix. - [Customer stories](https://www.zonguru.com/testimonials): What brands and agencies say about ZonGuru and Helix. - [Workshops](https://www.zonguru.com/workshops): Full workshop decks showing Helix engineering listings for real brands, with MCP prompts to run it yourself. - [Resource Center](https://www.zonguru.com/resource-center): Guides, workshops and MCP setups for AI Listing Engineering. - [Blog](https://www.zonguru.com/blog): Amazon selling guides across listing optimization, product research, PPC, business strategy, KDP and industry news. - [Contact](https://www.zonguru.com/contact): Support, sales and agency terms. - [Careers](https://www.zonguru.com/careers): Open remote roles at ZonGuru and its managed-services division. - [Partners](https://www.zonguru.com/partners): Recommended Amazon seller services. - [Press kit](https://www.zonguru.com/press-kit/zonguru): Logos, product description and founder material for press use. ## Optional - [Log in](https://www.zonguru.com/login): Sign in to Helix, or to the ZonGuru toolkit existing members already use. ZonGuru members activate Helix with their current login. - [Amazon reviews not showing up](https://www.zonguru.com/blog/amazon-review-not-showing-up): Eleven reasons a review is missing and how to fix each. - [Free Amazon seller tools](https://www.zonguru.com/blog/free-amazon-seller-tools): 22 free tools for 2026, including the AI Readiness Score. - [What is an Amazon ASIN](https://www.zonguru.com/blog/amazon-asin-guide): The 10-character product ID and how it feeds COSMO and Rufus discovery. - [What percentage does Amazon take](https://www.zonguru.com/blog/what-percentage-does-amazon-take): Referral fees, FBA and advertising costs in 2026. - [How to create an Amazon Store](https://www.zonguru.com/blog/create-an-amazon-store): Step-by-step guide to building a Brand Store. - [Amazon FBA holiday calendar](https://www.zonguru.com/blog/amazon-fba-holiday-calendar): The selling dates every seller should track. - [Amazon keyword research](https://www.zonguru.com/blog/amazon-keyword-research): How to find high-converting search terms. - [Terms of Service](https://www.zonguru.com/terms-of-service): ZonGuru Holdings, Inc. terms. - [Privacy Policy](https://www.zonguru.com/privacy-policy): How ZonGuru handles personal data.