Stacksquare

Stacksquare brings together founders, investors, and operators building in London. We host intimate events where the conversations are worth having, and the people in the room are worth knowing.

We meet in the square.

Fireside chatsExpert sessionsPeer gatheringsHackathonsIdeathonsTechnology stackCapital structureStrategic planningPsychologyFoundersInvestorsOperatorsVenture capitalTerm sheetsUnit economicsGo-to-marketProduct-market fitDue diligenceCompetitive moatsDecision makingFundraisingMarket entryPricing powerSmall roomsAI agentsFoundation modelsApplied AIMachine learningDeveloper toolsOpen sourceCloud infrastructureCybersecurityFintechHealthtechClimate techDeeptechSaaSMarketplacesNetwork effectsBehavioral economicsCap tablesBoard dynamicsM&AHiring the first tenBurn rateFounder psychology
Fireside chatsExpert sessionsPeer gatheringsHackathonsIdeathonsTechnology stackCapital structureStrategic planningPsychologyFoundersInvestorsOperatorsVenture capitalTerm sheetsUnit economicsGo-to-marketProduct-market fitDue diligenceCompetitive moatsDecision makingFundraisingMarket entryPricing powerSmall roomsAI agentsFoundation modelsApplied AIMachine learningDeveloper toolsOpen sourceCloud infrastructureCybersecurityFintechHealthtechClimate techDeeptechSaaSMarketplacesNetwork effectsBehavioral economicsCap tablesBoard dynamicsM&AHiring the first tenBurn rateFounder psychology

The manifesto

There’s a specific kind of conversation that only happens in person. The one that actually changes something.

Why Stacksquare exists

The events

What’s on in the square

All events →
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The next session is being planned, and you’ll be the first to know.

Past events

01

10 Jul 2026

London Startup Center

Featured

Turkish Builders Meetup #2

Bringing the Turkish tech community back together, bigger the second time. A founder panel on the realities of building and funding, for founders, developers, investors, and tech enthusiasts.

View on Luma ↗

02

08 Jun 2026

London, UK

Featured

Turkish Builders Meetup #1

Bringing the Turkish tech community together to discuss the realities of building and funding. For founders, developers, investors, and tech enthusiasts.

View on Luma ↗

What we host

01

Fireside chats

One guest, live questions, no podium. The conversation you wish the panel had been.

02

Expert sessions

A practitioner walks through what they actually do, and takes it apart with the room.

03

Peer gatherings

Founders, investors, and operators around one table. Small enough that everyone talks.

04

Building sessions

Hackathons and ideathons where teams build something real, fast.

The next room is forming.

Rooms stay small by design. One expert in the middle, four lenses on the table, and seats that go fast.

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