# Kuratowski

> Kuratowski is a marketplace where businesses find, install and connect third-party SaaS apps. Apps run on their vendors' own servers; Kuratowski reviews each app before it is listed and carries data between the apps a user connects.

Browsing the store needs no account. Installing an app, connecting apps and submitting an app as a vendor require signing in.

The interface is available in 12 languages (en, tr, de, fr, es, it, pt, ru, ar, zh, ja, ko). English pages have no prefix; other languages add one, for example https://kuratowski.com/tr/market.

## What Kuratowski is

### What is Kuratowski?

Kuratowski is a marketplace where businesses find, install and connect third-party SaaS apps. Apps run on their vendors' own servers; Kuratowski reviews each app before it is listed and carries data between the apps a user connects.

### Who is it for?

Businesses that already run several separate SaaS tools and want them to work together. Browsing the store needs no account; installing an app, connecting two apps and submitting an app as a vendor require signing in.

### Where do the apps run?

Every app runs on the servers of the vendor that built it, and opens inside a frame on Kuratowski. Vendor code never runs on the Kuratowski platform itself: an embedded app stays on its own origin and receives a short-lived token that tells it which user is looking at it.

### What does review mean?

No app is listed before a reviewer has gone through it. The rules are published, not internal, and they are grouped as security and data, technical requirements, storefront content, reviews and ratings, process. Every rejection and every change request cites the rule number it rests on, so a vendor reads the basis of the decision instead of guessing it.

### Who holds the data?

Your business records stay in the app you installed, on that vendor's own servers. Kuratowski does not become a second store for them: when you connect two apps, Kuratowski carries a record from one to the other, and it carries only the fields the two apps declared.

## Store

- [Home](https://kuratowski.com/): Entry page with search.
- [Market](https://kuratowski.com/market): Every listed app and extension. Search apps with `?q=`, extensions with `?qe=`, filter with `?category=` (a category group or a single category).
- App page: `https://kuratowski.com/market/{slug}`. Description, screenshots, reviews and the install button for one app.
- [Sitemap](https://kuratowski.com/sitemap.xml): The full list of listed app pages, in every language.

## For vendors

- [Vendor guide](https://kuratowski.com/vendor/guide): Everything a vendor does to publish an app, in order. Last updated 2026-09-21.
- [Platform identity](https://kuratowski.com/.well-known/kuratowski-platform.json): Issuer, JWKS address and signing algorithm that embedded apps use to verify Kuratowski tokens.

The vendor console itself (applying, verifying domains, registering and submitting apps) is under `/vendor` and requires signing in.

## Vendor guide, section by section

- [0. The path at a glance](https://kuratowski.com/vendor/guide#bolum-0)
- [1. Four things to know before you start](https://kuratowski.com/vendor/guide#bolum-1)
- [2. Step 1: vendor application](https://kuratowski.com/vendor/guide#bolum-2)
- [3. Step 2: domain verification](https://kuratowski.com/vendor/guide#bolum-3)
- [4. Step 5: manifest](https://kuratowski.com/vendor/guide#bolum-4)
- [5. Step 6: review information and demo account](https://kuratowski.com/vendor/guide#bolum-5)
- [6. Step 7: submission](https://kuratowski.com/vendor/guide#bolum-6)
- [7. Step 8: review](https://kuratowski.com/vendor/guide#bolum-7)
- [8. Step 9: approval, store page, publishing](https://kuratowski.com/vendor/guide#bolum-8)
- [9. Embedded session: the technical contract](https://kuratowski.com/vendor/guide#bolum-9)
- [10. Connections: when your app is at one end of a flow](https://kuratowski.com/vendor/guide#bolum-10)
- [11. After publishing: versions and updates](https://kuratowski.com/vendor/guide#bolum-11)
- [12. User data and your responsibility](https://kuratowski.com/vendor/guide#bolum-12)
- [13. User reviews, withdrawal, suspension](https://kuratowski.com/vendor/guide#bolum-13)
- [14. The most common reasons for rejection](https://kuratowski.com/vendor/guide#bolum-14)
- [15. Pre-submission checklist](https://kuratowski.com/vendor/guide#bolum-15)
- [16. What does not exist today](https://kuratowski.com/vendor/guide#bolum-16)

## Legal

- [Terms of Use](https://kuratowski.com/legal/terms)
- [Privacy Policy](https://kuratowski.com/legal/privacy)
- [Vendor Agreement](https://kuratowski.com/legal/vendor)

The binding version of this document is the Turkish one.

- [Review Guidelines](https://kuratowski.com/legal/guidelines): What a reviewer checks before an app is listed.

DRAFT. This text is not yet in force: the operator details are unfilled and it has not been reviewed by a lawyer.

Legal and privacy requests: legal@kuratowski.com
Support and vendor questions: support@kuratowski.com

## Optional

- [Sales & CRM](https://kuratowski.com/market?category=sales-crm): Categories `crm`, `contacts-directory`, `sales-engagement`, `revenue-intelligence`, `proposals-quotes`, `partner-affiliate`
- [Marketing](https://kuratowski.com/market?category=marketing): Categories `email-marketing`, `social-media-management`, `seo-content-marketing`, `advertising`, `marketing-automation`, `events-webinars`, `forms-surveys`, `brand-asset-management`
- [Commerce & Retail](https://kuratowski.com/market?category=commerce): Categories `online-store`, `marketplace-selling`, `point-of-sale`, `subscription-billing`, `payments`, `shipping-fulfillment`, `loyalty-promotions`
- [Finance & Accounting](https://kuratowski.com/market?category=finance): Categories `accounting-bookkeeping`, `invoicing-receivables`, `expense-management`, `payroll`, `tax-compliance`, `financial-planning`, `banking-treasury`, `personal-finance`, `crypto-digital-assets`, `lending-credit`
- [Operations & Supply Chain](https://kuratowski.com/market?category=operations): Categories `inventory-management`, `supply-chain-logistics`, `fleet-field-service`, `procurement`, `manufacturing-production`, `erp`, `quality-compliance-ops`, `facilities-maintenance`
- [People & HR](https://kuratowski.com/market?category=people): Categories `hr-information-system`, `recruiting-ats`, `performance-engagement`, `workforce-scheduling`, `benefits-compensation`, `global-employment`
- [Customer Support](https://kuratowski.com/market?category=support): Categories `help-desk`, `live-chat`, `knowledge-base`, `contact-center`, `customer-success`, `community-forums`
- [Data & Analytics](https://kuratowski.com/market?category=data): Categories `business-intelligence`, `product-analytics`, `web-marketing-analytics`, `data-warehouse`, `data-integration`, `data-governance`, `machine-learning-platform`, `databases`
- [Productivity & Collaboration](https://kuratowski.com/market?category=productivity): Categories `documents-writing`, `spreadsheets`, `presentations`, `notes-wiki`, `project-management`, `whiteboard-diagramming`, `file-storage`, `email-client`, `calendar-booking`, `video-meetings`, `team-chat`, `workflow-automation`, `ai-assistants`, `translation-localization`
- [Design & Creative](https://kuratowski.com/market?category=creative): Categories `image-editing`, `vector-illustration`, `ui-ux-design`, `graphic-design`, `publishing-layout`, `three-d-animation`, `video-editing`, `audio-music`, `photography-workflow`, `game-development`, `cad-technical-design`, `generative-ai-media`
- [Software & IT](https://kuratowski.com/market?category=engineering): Categories `source-control`, `code-editors`, `ci-cd`, `hosting-deployment`, `api-tools`, `monitoring-observability`, `incident-management`, `infrastructure-cloud`, `app-builders`, `website-builders`, `cms-platforms`, `communication-apis`, `ai-developer-tools`, `it-service-management`, `device-management`
- [Security & Identity](https://kuratowski.com/market?category=security): Categories `identity-access`, `password-secrets`, `endpoint-protection`, `network-web-security`, `application-security`, `grc-compliance`, `privacy-data-protection`, `backup-recovery`, `security-training`
- [Education & Learning](https://kuratowski.com/market?category=learning): Categories `lms-course-delivery`, `student-information`, `classroom-engagement`, `language-learning`, `course-marketplace`, `tutoring-assessment`
- [Health & Wellness](https://kuratowski.com/market?category=health): Categories `clinical-ehr`, `practice-management`, `telehealth`, `mental-health`, `fitness-wellness`, `life-sciences`
- [Industry Solutions](https://kuratowski.com/market?category=industry): Categories `legal-practice`, `contract-management`, `real-estate-property`, `construction-project`, `architecture-engineering`, `hospitality-hotels`, `restaurants-food`, `agriculture`, `energy-utilities`, `insurance`, `automotive`, `transportation-travel`, `nonprofit-fundraising`, `government-public`, `professional-services`, `media-entertainment`, `research-science`
- [Other](https://kuratowski.com/market?category=other): Categories `other`