Cover

01/13

↗One workspace for the post-Slack era — built in Europe, owned by you.

The OS for modern
product teams

polybase

We’re building the sovereign workspace for Europe — chat, tasks, calls, docs and goals in a single, EU-hosted app your business actually owns.

RoundPre-seed · €500k · Closing July 2026

StageLive product · Paying pilots · v2.0 in Q4

Made in🇪🇺European Union

Press ↓ · space · or click any dot to navigate

Team

02/13

↗Two complementary founders who have shipped together for years — half engineer, half operator, fully obsessed with the product.

A team that has built & broken things together.

Gökay Küçük

Co-founder · CEO & CTO

Builds the engine. 12+ years shipping production software, polyglot engineer who has scaled product teams from zero to series-B.

Full-stack architectEx-Series-B CTOAI & realtime systems

Emre Sertel

Co-founder · COO & Head of Growth

Builds the business. A decade running operations and GTM for B2B SaaS — turning early traction into pipeline, partnerships and paying logos.

B2B SaaS operatorGTM & enterprise salesFounder mindset

Working together since 2018Two prior products shipped to productionAlready paying customers on Polybase

Problem

03/13

↗Europe's most valuable corporate asset — its internal communication — is hostage to vendors that no longer share its values.

The threat is not theoretical

Your most valuable data is sitting on someone else’s servers.

Slack, Teams, Notion. Years of strategy, IP, customer relationships and product decisions — all stored outside the EU, by US vendors whose own government is going unpredictable on the world.

Internal communication is the company. Lose control of it and you lose the company.

“Every chat message is a future legal document, a future training set, a future leak. Today it lives on the wrong continent.”

— Why we started Polybase

Three structural risks

Data leaves the EU
US-hosted SaaS holds the most sensitive thing your business owns — its conversations.
Authoritarian drift
Geopolitics is no longer abstract: data is leverage, and Europe is exposed.
CLOUD Act risk
US vendors can be compelled to hand over your data — even when stored on EU soil.

~ 90%of internal company knowledge lives in chat — and chat is what foreign vendors hold.

Tailwinds

04/13

↗The market has already started moving — every week new headlines push European businesses off US tools and into our arms.

It is tailwind season

Europe is already switching.

Whole government bodies, banks and Mittelstand champions are actively phasing out Slack, Teams and Notion. The replacement shortlist is short — and it’s European. We just need to be on it.

+47%EU SaaS spend YoY in regulated industries

70%of CIOs cite sovereignty as a 2026 priority

€2.1Bin 'digital sovereignty' EU funding 2024–27

Press · Q1 2026Live trend

HandelsblattMar 2026

German Mittelstand turns away from US cloud — ‘sovereignty is no longer optional’

Heise OnlineFeb 2026

Bundesländer prepare exit from Microsoft Teams in favour of European alternatives

Süddeutsche ZeitungJan 2026

Schrems III: companies told to assume US data transfers are not safe

Der SpiegelDec 2025

‘Made in Europe’ software hits record contract wins in DACH region

Conclusion: the wave is already here · we just need a board.

Solution

05/13

↗Polybase replaces five US tools with one EU-hosted product — 100% secure, fully owned, and shipping today.

The rising EU player

One app. Zero context switches.

Polybase is a single, EU-hosted operating system that gives teams everything they need to ship — and gives the company full control over its data.

EU data sovereignty
Hosted in Frankfurt, owned by an EU entity. Not subject to the CLOUD Act. Self-host on your VPC if you want absolute control.
All tools in one app
Chat, tasks, calls, docs, goals and calendar — built as one product, not five integrations. No context switching, no duplication, no SSO sprawl.
100% your data
Export everything, anytime. Open APIs, no lock-in, end-to-end encrypted at rest. We are the rising EU player and we plan to stay rising.

polybase.app · workspaceEU · Frankfurt

# acme-q3-launch

Pushed the new pricing slide — let’s also turn the feedback into an action item before standup?

On it — auto-generated. ⚡

Update pricing deck · Acme Q3

due thuauto-captured

Type a message…

AI summary

1 new task assigned to GK

Pricing deck v3 shared

Standup at 10:00

Storage🇪🇺 Frankfurt · AES-256 · zero foreign transfers

Status & roadmap

06/13

↗A live, paid v1.0 today — and a v2.0 in Q4 that turns Polybase into the full operating system for European teams.

Shipping today, doubling down tomorrow.

Live · Q2 2026

Polybase 1.0

shipping

The unified workspace. Everything an EU team needs to replace Slack + Asana + Zoom + Notion — on the same data model.

Channels & DMs

Tasks & boards

Video meetings

Real-time docs

Shared calendar

AI assistant

Q4 2026

Polybase 2.0

in build

The full operating system. Strategy, automation and enterprise-grade deployment — turning Polybase from a tool into the central nervous system of the company.

OKRs & strategy

Whiteboards

On-premise install

Enterprise SSO + audit

Knowledge graph AI

Workflow automation

North star ↗Become the default workspace·For every European team that values its data

Competition

07/13

↗Polybase is the only product that combines Slack-class UX, EU price/sovereignty and the full feature depth of an OS.

Where we actually stand.

We picked four real category leaders and the most credible European alternatives — and ran the same yardstick across all of them.

VendorUser-friendlyPriceOn-premCloudFeature depth

🇺🇸Slack

USA

9/10

€€

4/10

🇺🇸MS Teams

USA

6/10

€

6/10

🇩🇪Stackfield

6/10

€€

5/10

🇩🇪Nextcloud Hub

5/10

€

6/10

🇪🇺Polybaseus

9/10

€

9/10

Polybase advantageSlack-class UX9 / 10

Polybase advantageSingle product, full depth9 / 10

Polybase advantageEU sovereign + on-prem✓ ✓

Technical moat

08/13

↗Legacy players bolt features onto disconnected silos. We started with the graph — and that head-start compounds every quarter.

The technical story

We’re not catching up. They are.

Slack and Teams were architected for one thing — chat — and have spent a decade duct-taping the rest. We had the benefit of starting fresh, in 2024, with a unified data model the legacy stack physically cannot replicate.

Single-graph data model

Slack stores messages, Asana stores tasks, Notion stores docs. We store all of it in one graph — so a chat can become a task that lives in a doc that updates an OKR. Legacy vendors literally cannot do this without acquisitions.

Modern realtime stack from day 1

Built on CRDTs and event-sourced sync, not 2010-era polling APIs. Every surface is real-time, offline-capable and conflict-free.

Sovereignty as architecture, not config

EU residency, customer-managed keys and on-prem deployments are not a checkbox — they're how the system was designed. Competitors retrofit. We don't.

AI-native workspace primitives

Because all surfaces share a graph, our AI can reason across chat + tasks + docs at once. Bolted-on AI gives you a chatbot. Native AI gives you autonomy.

Unified knowledge graphRealtime

Polybase Graph

Chat

Tasks

Docs

OKRs

Calendar

One graph means one source of truth means one company brain. That’s the moat.

Market

09/13

↗A €420M wedge today, opening into a €14B European market — inside a €78B global category that grows ~14% YoY.

TAM · $78B

SAM · $14B

SOM · $420M

You are
here

Market opportunity

A wedge. Then a category.

TAM$78B
Total addressable market
Global team-collaboration software (chat, tasks, calls, docs, OKRs).
Worldwide · 2030 forecast
SAM$14B
Serviceable available market
EU + EEA + UK organisations actively replacing US workspace stacks.
Europe · 2028 forecast
SOM$420M
Serviceable obtainable market
Mittelstand + public sector in DACH/NL — our 3-year beachhead.
DACH + NL · 2028 reachable

Capturing just 1% of SAM puts Polybase at €140M ARR. A focused DACH/NL beachhead is the realistic 3-year path there.

Go-to-market

10/13

↗A staged climb — basecamp to summit — turning founder-led DACH wins into a default-workspace position across Europe.

The climb

One peak. Six camps.

5,300 m

6,000 m

6,800 m

7,500 m

8,200 m

8,849 m

5,300 mdone

Basecamp · Foundations

Product live · 12 paying pilots
Founder-led sales in DACH/NL
First 5 enterprise references

6,000 mnow

Camp 1 · Inbound engine

Sovereignty content + PR
EU partner network (MSPs)
Self-serve cloud & template gallery

6,800 mnext

Camp 2 · Mid-market motion

2 AEs hired in DACH
Reseller channel for Mittelstand
Compliance bundle (ISO 27001 / TISAX)

7,500 mnext

Camp 3 · Public sector

Framework agreements (Deutschland-Stack)
On-prem reference deployments
Open-source modules

8,200 mnext

Camp 4 · Pan-EU expansion

FR / Nordics localisation
Series A · scale GTM
EMEA partner alliance

8,849 msummit

Summit · Default workspace of EU

Replace Slack/Teams across the Mittelstand
First-call brand for sovereign work
Seat at the EU digital sovereignty table

Financial projections

11/13

↗A scaffold of the four-year plan — a working session with investors will fill in the numbers based on the agreed funding scenario.

Plan · template

Numbers we can defend.

We’d rather close this number with you than guess at it alone. The shell below shows the levers — ARR, customers, headcount, burn — and we will fill it in jointly during a working session with the lead investor.

Revenue trajectory · directional

Modeled

Projections shell4-year plan

2026202720282029

ARRAnnual Recurring Revenue

————

CustomersPaying organisations

————

HeadcountFull-time team

————

Net burn / moCash consumption

————

Note · this is a deliberately empty shell. Final values will be agreed with the lead investor and become the basis for the term sheet.

The ask

12/13

↗€500k pre-seed by July 2026 — funding 18 months of focused execution to get us from paying pilots to mid-market scale.

Pre-seed round

€500k

raised by July 2026.

Funds 18 months of execution — taking us from a live product with paying pilots to mid-market scale and the door of a Series A.

Runway · 18 months

Use of funds · 60 / 25 / 15

Close · Jul 2026

Use of funds

Product & Tech

60%

Two senior engineers · v2.0 build · enterprise-grade infra

€300k

Sales & Marketing

25%

First AE in DACH · category content · partner activation

€125k

Mgmt. & General

15%

Legal, finance, EU compliance, runway buffer

€75k

Contact

13/13

↗If anything in here resonated — let's open the conversation. We'd love to walk you through the live product.

End of deck

Interested?

Let’s talk.

We’ll happily walk you through the live product, share customer references, and discuss how a partnership with the right investor could shape Polybase’s next 18 months.

Schedule a 30-minute call

Gökay Küçük

Co-founder · CEO & CTO

Polybase · Made in EU · Hosted in Frankfurt

polybase

A team that has built & broken things together.

Gökay Küçük

Emre Sertel

Your most valuable data is sitting on someone else’s servers.

Europe is already switching.

One app. Zero context switches.

EU data sovereignty

All tools in one app

100% your data

Shipping today, doubling down tomorrow.

Polybase 1.0

Polybase 2.0

Where we actually stand.

We’re not catching up. They are.

Single-graph data model

Modern realtime stack from day 1

Sovereignty as architecture, not config

AI-native workspace primitives

A wedge. Then a category.

Total addressable market

Serviceable available market

Serviceable obtainable market

One peak. Six camps.

Basecamp · Foundations

Camp 1 · Inbound engine

Camp 2 · Mid-market motion

Camp 3 · Public sector

Camp 4 · Pan-EU expansion

Summit · Default workspace of EU

Numbers we can defend.

€500k

Product & Tech

Sales & Marketing

Mgmt. & General

Interested?

Let’s talk.

Gökay Küçük