Top Startups in London

29 hand-picked startups based in London. Discover the companies and founders shaping London's tech ecosystem.

UK · 29

New

Signal IDX

Real-time startup intelligence and market signals

AI UK London

New

Buy Sell Startups

The marketplace to buy and sell startups, SaaS, and side projects

Marketplace UK London

Stability AI

Open-source AI for the benefit of humanity

AI UK London

Raycast

Your shortcut to everything on your Mac

DevTools UK London

Multiverse

Apprenticeships as the smarter alternative to university

SaaS UK London

Synthesia

Create AI videos from text in minutes

AI UK London

New

Granola

AI meeting notes that capture context, not just words

SaaS UK London

PhysicsX

AI simulation software for engineering at lightspeed

AI UK London

Causal

Financial modeling meets live data — no more spreadsheets

AI UK London

New

Isometric

The rigorous scientific standard for carbon credits

SaaS UK London

Snyk

Developer security platform to build secure software fast

DevTools UK London

Paddle

All-in-one payments, tax, and subscriptions for SaaS

Fintech UK London

Attio

The next generation CRM built for modern businesses

SaaS UK London

Round

Smart cash management and treasury for startups

Fintech UK London

New

Layercode

Real-time AI voice and video pipelines as infrastructure

DevTools UK London

Humanloop

Prompt management and LLM evaluation platform

AI UK London

Raising

Trigger.dev

Open-source background jobs for modern TypeScript apps

DevTools UK London

Axiom

Serverless log management and event data platform

DevTools UK London

$Infracost$

Infracost

Cloud cost estimates in pull requests

DevTools UK London

QuestDB

Fast open-source time series database

DevTools UK London

Lightdash

Open-source BI on top of dbt

SaaS UK London

ANNA Money

Smart business account and tax app

Fintech UK London

Treblle

API observability and developer experience platform

DevTools UK London

Cerbos

Open-source authorisation layer for any stack

DevTools UK London

New

SurrealDB

The ultimate multi-model database

Open Source UK London

tldraw

A tiny little drawing app and SDK

Open Source UK London

Flagsmith

Feature flags and remote config for any platform

Open Source UK London

Postal

Full-featured open source mail delivery server

Open Source UK London

New

BoxyHQ

Enterprise SSO and directory sync in minutes

Open Source UK London

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