# sumthink

> AI venture studio, IP factory and open experts collective, from Hamburg. Actual Intelligence: real human expertise supercharged with AI that earns its place.

sumthink (operated by Die Quadratur UG, Hamburg) is an AI venture studio with an open experts collective. We turn hunches into market-ready digital products: strategy and product definition, requirements engineering, design and development, and AI solutions, owned end to end. We built our own product portfolio the same way we build for clients. Ideas in, masterpieces out.

## Services

- Strategy & Product Definition: sharp product thinking, not slideware. The hard calls made early: what to build, why it wins, what to leave out.
- Requirements Engineering (Analysis & Blueprinting): we define exactly what gets built before a line of code. It is where most builds quietly fail, and where we are hardest to beat. AI surfaces the edge cases people miss; expert judgment decides which ones matter.
- Full-Service Development (Design & Development): idea to market by a lean, dedicated team of experts. Design, product and engineering owned end to end, from first sketch to market entry.
- AI Solutions (Human & Artificial Intelligence): we use AI where it earns its place and leave it out where it doesn't. Every model, agent and automation is a deliberate call, engineered deep enough to hold up when real users arrive.

## Products (IP factory, built in-house)

- Aimber: free AI resume and ATS optimizer with CV builder, translation and career analysis.
- wearner (wearner.app): camera-based resale value appraiser, live as a PWA.
- signeee (signeee.de): client-side PDF signing. Files never leave the device, DSGVO-friendly by architecture.

## Collective

An open circle of builders, creators and entrepreneurs who form sumthink together. No gate, no fee. Cooking sessions every two weeks: founders show what they are building, get honest feedback and leave with a room behind them.

## Working with us

Start a project request on https://sumthink.io/ or email info@diequadratur.de. We reply within one working day. Based in Hamburg, Germany; we work in English and German.

## Pages

- [Home](https://sumthink.io/): studio overview, services, portfolio, collective, about, contact.
- [Expert reviews](https://sumthink.io/expertsreview): fractional human expert reviews on demand across eight lanes (requirements, architecture, infrastructure, AI integration, UX and design systems, code, security, compliance readiness). One named human expert per review, NDA before access, a written verdict in days with max three fix-nows, fixed scope, Hamburg, EU. Bookable by humans today; agent booking endpoint (MCP) in build.
- [Expert Reviews (Deutsch)](https://sumthink.io/de/expertsreview): deutsche Fassung. Externe Expert Reviews zum Festpreis für Lastenheft, Architektur, Code-Audit, KI-Integration, UX, Security-Review (kein Pentest) und AI-Act-Readiness. Ein benannter Experte, schriftliches Urteil in Tagen, höchstens drei Fix-nows, NDA vor Einsicht, Hamburg.
- [Imprint](https://sumthink.io/imprint): legal information for Die Quadratur UG.
- [Privacy](https://sumthink.io/privacy): privacy policy.