in

London’s 58 Fastest Growing Open Source Startups

At Best Startup London we track over 100,000 London based startups and over 500,000 people who hold key positions in these companies. We use this directory of startups to highlight top employees, founders and organisations we think deserve more appreciation than they are currently getting.

We’ve ranked the top 59 Open Source companies in London. The companies, startups and institutions listed in this article are all exceptional companies, well worth a follow. We have included links to their websites, socials and CrunchBase (if you’re interested in their financials).

We selected the organisations listed in this article based on:

  • Track record
  • Executive leadership
  • Market share
  • Innovation
  • ESG rating

Our Data – We source our data from OSINT (open source intelligence) and public directories such as CrunchbaseSemRush and many more. The data from these sources should be treated with a degree of caution and verified yourself.

Top Open Source Companies & Startups (London)


IRCCloud

FoundersJames Wheare, Richard Jones
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

IRCCloud is a modern, always-connected IRC client that works on mobile and the web


Parity Technologies

FoundersBjörn Wagner, Gavin Wood, Jutta Steiner
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Parity aims to enable businesses and organisations to capitalize on blockchain technology and benefit from the new opportunities.


Lenses.io

FoundersAntonios Chalkiopoulos, Christina Daskalaki
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

DataOps – A real-time applications and data operation portal


Aventus Network Systems

FoundersAlan Vey, Annika Monari, Kavon Soltani
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Aventus is a layer-2 blockchain protocol that brings scalability, lower costs, and speed to Ethereum transactions.


BoxyHQ

FoundersCarlos Samame, Deepak Prabhakara
FollowWebsite, Crunchbase, Twitter, Github, Linkedin

BoxyHQ helps developers automate product security, and it provides low-code APIs to enable enterprise compliant security


Pillar Project

FoundersDavid Siegel, Michael Messele, Robert Gaskell, Tomer Sofinzon, Vitor Py
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Platform to contextually manage your identity and transact with the services of the emerging web3 digital economy.


Matrix

FoundersAmandine Le Pape, Matthew Hodgson
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Matrix.org is an ambitious not-for-profit open source initiative defining a new open standard for interoperable communications.


ChupaMobile

FoundersFabio Pezzotti, Paolo De Santis, Stefano Argiolas
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

ChupaMobile is a marketplace where everybody can buy professional apps and games, ready to be customized and distributed on the App Stores.


Canonical

FoundersJane Silber, Mark Shuttleworth
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Canonical is a computer software company that markets commercial support and related services for Ubuntu and related projects.


Seldon

FoundersAlex Housley
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Machine Learning Deployment Platform


Snowplow Analytics

FoundersAlexander Dean, Yali Sassoon
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Snowplow Analytics provides enterprise-strength digital analytics across multiple platforms


Openplay

FoundersIan Pridham, Sam Parton
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

OpenPlay is an online platform that allows any sports facility to take online bookings, payments and manage their customers.


Kryotech

FoundersJean-Brunel Webb-Benjamin
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Kryotech is an App Development company.


Silicon

FoundersDominique Busso
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Silicon UK, is the authoritative UK source for news, features and reviews of business technology.


Flooved

FoundersHamish Brocklebank
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Flooved is a provider of interactive social e-textbooks with personalized content for students and professors.


ReportLab

FoundersAndrew Robinson
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Report Lab builds solutions to generate rich, attractive and fully bespoke PDF documents at incredible speeds.


Rabbit Technologies

FoundersAlexis Richardson
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Rabbit Technologies offers RabbitMQ which is open source message broker software implementing the advanced message queuing protocol (AMQP).


Mastodon C

FoundersBruce Durling, Francine Bennett
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Offer the open source technology platform and the skills to help you realise that potential, and we do it all on zero carbon infrastructure.


ROLUSTECH

FoundersShahrukh Riaz
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Official SugarCRM and Salesforce Partners providing expert development and consultancy services.


NovaMining

FoundersMattia Pintus
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Blockchain start-up building solutions to improve criteria of transparency, quality, usability and compliance in crypto mining and exchange.


Patchstack

FoundersOliver Sild, Tauri Karson
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Patchstack is a website security and monitoring platform.


Easy Software Ltd.

FoundersFilip Morávek
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Easy Software is an open source company in the field of business software.


Jmix

FoundersUnknown
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Jmix is a high-level open source Java framework for the rapid development of enterprise applications.


Pandastream

FoundersUnknown
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Pandastream is an open source video encoding solution.


Open Classifieds

FoundersChema Garrido, Marco A. Sánchez Alfaro
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Create Amazing Classifieds Websites


CO:CUBED

FoundersJeremy Basset
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

CO:CUBED helps FTSE100 companies to embrace the startup revolution, by defining and executing their collaborative innovation capabilities.


Postjer CMS

FoundersHudi Shehu, Ylli Merkohasani
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Postjer transforms your data, people, and organizations.


eSynergy Solutions

FoundersUnknown
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

eSynergy Solutions offers businesses with recruitment services for developers, programmers, and engineers.


Curverider

FoundersBen Werdmuller, David Tosh
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Curverider develops socially-enabled software that allows organizations to increase knowledge-sharing and productivity.


Pharaoh Tools

FoundersDavid Amanshia
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Open source, PHP, full-stack DevOps tools


SWCMS

FoundersDamon Wirth
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

SWCMS is an open source development team focused on creating a social news platform with similar functionality to the market leaders such


Ricston

FoundersPeter Delia
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Services for Integration & Mobility


Symbian Software Ltd.

FoundersUnknown
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Symbian develops the operating system used on Nokia, Motorola and Samsung mobile and smart phones.


Caesar.Team

FoundersAleksandr Beshkenadze, Egor Tomilin, Evgeny Scherbak, Evgeny Smirnov
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Caesar.Team is the open-source password and document manager for teams


Squiz UK

FoundersUnknown
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Squiz is a global technology and strategy business that drives digital transformation for its customers.


Blockware

FoundersHenrik Hofmeister, Jacob Laurvigen
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Software Reimagined


The Xen Project

FoundersUnknown
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

The Xen Project is an open-source virtualization platform that powers the world’s largest clouds in production.


Open-First

FoundersUnknown
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Open-First specialize in helping companies of all sizes re-examine their communication, design, innovation, management and support.


ApiAxle

FoundersUnknown
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

ApiAxle is a proxy software that manages network features and provides analytical data on network traffic.


Bacula

FoundersKern Sibbald
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Open source set of computer programs that permits the system administrator to manage backup, recovery, and verification.


Jaaz Portal

FoundersUnknown
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Complete, out-of-box, automated web hosting solution licensed also as an Open Source.


Symbian Foundation

FoundersDavid Wood
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Symbian foundation is a software licensing company that creates and licenses open operating systems for mobile phones.


skylable

FoundersAlberto Wu, Edvin Torok, Luca Gibelli, Tomasz Kojm
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Open-source software-defined storage


Escrowblock

FoundersKevin Hollands
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Escrowblock is a platform that provides a gateway on the ethereum blockchain.


Oasis Loss Modelling Framework

FoundersUnknown
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Oasis Loss Modelling Framework provides an open source catastrophe modelling platform.


Orchard

FoundersAanand Prasad, Ben Firshman
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Get a Docker host in the cloud, instantly.


Vorari

FoundersNagib Tharani
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Open Source Cloud SaaS Solutions


REDK Software Engineering

FoundersUnknown
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Open Source solutions


Gephi

FoundersUnknown
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Gephi is an open-source software for network visualization and analysis.


Jobberbase

FoundersFilip Chereches-Tosa
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Jobberbase is an open-source job board platform that enables the creation of job sites on the internet.


AFKAR

FoundersFernando Sainz
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

An “Internet Of Things” Startup business.


LearnerShape

FoundersUnknown
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

LearnerShape is an IT firm that offers learning solutions including learning infrastructure and custom training programs.


Juno Computers

FoundersGiovanni Caligaris
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Linux laptops and computers


Open Source Living

FoundersUnknown
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Open Source Living is an information and archive service for high quality Open Source software (OSS).


Anephenix

FoundersUnknown
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Anephenix is a digital studio making web products and services.


CiviHR

FoundersUnknown
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

CiviHR engages in the development of open-source HR software for non-profit organizations.


Lutra Consulting

FoundersUnknown
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Lutra Consulting provides geographic information systems consulting services.


Aave

FoundersStani Kulechov
FollowWebsite, Crunchbase, Twitter, Facebook, Linkedin

Aave is an open source non-custodial protocol on Ethereum for decentralized lending and borrowing.

London’s 101 Fastest Growing Online Portals Startups

London’s 13 Fastest Growing Operating Systems Startups