Comparison · Claude · ChatGPT
Marketing Kit vs Windsor.ai
Both connect marketing data to Claude and ChatGPT over MCP. Windsor.ai covers a wide catalog of platforms; Marketing Kit covers fewer sources, with mobile app data and reading by default.
Free while in beta
Facts checked on 2026-10-04
In short
- Windsor.ai fits if you need many platforms: its connectors page lists 350+ sources, and its MCP server works with Claude, ChatGPT, Copilot, Cursor, Perplexity, Claude Code and other MCP clients.
- Marketing Kit fits if your questions are about a mobile app: spend from Meta, Google Ads and TikTok, installs from AppsFlyer, subscriptions from RevenueCat, sales and analytics from App Store Connect.
Changing things
Windsor.ai’s MCP documentation says that for Claude, ChatGPT and Microsoft Copilot it supports read access and write-back actions on select platforms like Meta Ads, Google Ads, TikTok Ads, LinkedIn Ads, Microsoft/Bing Ads and Amazon Seller Central; its examples include pausing or launching campaigns, reallocating budgets and pushing negative keywords. Marketing Kit has no tool that changes campaigns: it reads ad platforms, and its two kinds of change — AppsFlyer OneLink links and partner integration copies, and turning on App Store Connect Analytics Reports — run after your explicit yes.
Data on their side and on ours
Windsor.ai’s security page says that customer-processed data exists as cached data in their systems: data held in memory in connectors is kept for up to 24 hours, data cached to disk is deleted if it has not been accessed for at least 20 days, and the maximum retention period is about three weeks. The same page says they retain customer access tokens, stored securely and encrypted.
Marketing Kit keeps your numbers in a 15-minute in-memory cache, and a result too large for the chat waits behind a download link for up to 24 hours. Tokens and keys are encrypted at rest (AES-256-GCM).
Your data on our side
- Read-only, except the changes you confirm in chat (AppsFlyer OneLink links and turning on App Store Connect Analytics Reports).
- Tokens and keys are encrypted at rest (AES-256-GCM) and never shown back, logged or put into answers.
- Your numbers are fetched when you ask and not stored beyond a 15-minute in-memory cache; large results wait behind a download link for up to 24 hours. See the privacy policy.
- Disconnect a source, remove a key or delete your account on the site at any time.
Where the facts come from
Windsor.ai: their public pages on 2026-10-04 — connecting Windsor MCP to any AI client, integrating data into Claude, integrating data into ChatGPT, their connectors page, connecting AppsFlyer to Claude, their security page and their privacy policy. For prices see their pricing page. If anything has changed since, their pages win.
Marketing Kit: this site, the privacy policy and the terms.
| Marketing Kit | Windsor.ai | |
|---|---|---|
| Hosted MCP connector | Yes: https://marketing-kit.app/mcp | Yes: https://mcp.windsor.ai/ |
| Sign-in | OAuth; you sign in with Google or Meta | In Claude, sign in with a Windsor.ai account when adding the connector; in ChatGPT, Allow Access; an optional API key for other MCP clients; data sources are connected in Windsor.ai first |
| Assistants | Claude (plugin, custom connector, Claude Code) and ChatGPT (Developer mode) | Claude, ChatGPT and Copilot; also Cursor, Perplexity, Claude Code, Cline and other MCP clients |
| Sources | 11: Meta Ads, Facebook Pages, Instagram, TikTok Ads (not switched on yet), Google Ads, GA4, Search Console, AppsFlyer, RevenueCat, App Store Connect, App Store (public) | 350+ on their connectors page |
| Mobile app sources | AppsFlyer, RevenueCat, App Store Connect (sales, subscriptions, analytics, reviews), public App Store data | AppsFlyer, Adjust, Branch, Apple Search Ads; RevenueCat, App Store Connect and Google Play Console not in their connector list |
| Changes | Reads; two kinds of change after your explicit yes (AppsFlyer OneLink, App Store Connect Analytics Reports) | Read access, plus write-back actions on select platforms (Meta Ads, Google Ads, TikTok Ads, LinkedIn Ads, Microsoft/Bing Ads, Amazon Seller Central) |
| Data retention | 15-minute in-memory cache; large results behind a download link for up to 24 hours; tokens and keys encrypted (AES-256-GCM) | In memory up to 24 hours; disk cache deleted after 20 days without access, about three weeks at most; access tokens retained encrypted |
| Price | Free while in beta; pricing will be announced in advance (Terms, section 7) | See their pricing page |
Questions
Is Marketing Kit free?
Free while in beta; pricing will be announced in advance. Fees apply only after you agree to them (Terms, section 7).
Does Windsor.ai support AppsFlyer, RevenueCat and App Store Connect?
Their connectors page on 2026-10-04 had AppsFlyer, Adjust, Branch and Apple Search Ads; RevenueCat, App Store Connect and Google Play Console were not in it.
Is Marketing Kit read-only?
Every tool reads, except two that run only after your explicit yes: AppsFlyer OneLink links (with partner integration copies) and turning on App Store Connect Analytics Reports. Nothing changes ad campaigns.
Does it work in ChatGPT?
Yes. Add https://marketing-kit.app/mcp as a connector in ChatGPT Developer mode, on chatgpt.com with Plus, Pro, Business, Enterprise or Edu; in Business workspaces only admins and owners can turn Developer mode on. The steps are on Install.
Is my data stored?
No. Your marketing numbers are fetched when you ask and passed to your assistant. The server keeps a short in-memory cache (about 15 minutes, per user) so identical requests are not repeated, and a result too large for the chat waits behind a download link for up to 24 hours, for you only. Details are in the privacy policy.
Setup guide: install and connect every source
Read-only access, keys encrypted, your data fetched and not stored. Privacy policy
Windsor.ai is a trademark of Windsor Group AG. Marketing Kit is not affiliated with or endorsed by Windsor.ai.