Ellie Horvath
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 Crunchbase, SemRush 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
| Founders | James Wheare, Richard Jones |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
IRCCloud is a modern, always-connected IRC client that works on mobile and the web
Parity Technologies
| Founders | Björn Wagner, Gavin Wood, Jutta Steiner |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Parity aims to enable businesses and organisations to capitalize on blockchain technology and benefit from the new opportunities.
Lenses.io
| Founders | Antonios Chalkiopoulos, Christina Daskalaki |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
DataOps – A real-time applications and data operation portal
Aventus Network Systems
| Founders | Alan Vey, Annika Monari, Kavon Soltani |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Aventus is a layer-2 blockchain protocol that brings scalability, lower costs, and speed to Ethereum transactions.
BoxyHQ
| Founders | Carlos Samame, Deepak Prabhakara |
| Follow | Website, Crunchbase, Twitter, Github, Linkedin |
BoxyHQ helps developers automate product security, and it provides low-code APIs to enable enterprise compliant security
Pillar Project
| Founders | David Siegel, Michael Messele, Robert Gaskell, Tomer Sofinzon, Vitor Py |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Platform to contextually manage your identity and transact with the services of the emerging web3 digital economy.
Matrix
| Founders | Amandine Le Pape, Matthew Hodgson |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Matrix.org is an ambitious not-for-profit open source initiative defining a new open standard for interoperable communications.
ChupaMobile
| Founders | Fabio Pezzotti, Paolo De Santis, Stefano Argiolas |
| Follow | Website, 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
| Founders | Jane Silber, Mark Shuttleworth |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Canonical is a computer software company that markets commercial support and related services for Ubuntu and related projects.
Seldon
| Founders | Alex Housley |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Machine Learning Deployment Platform
Snowplow Analytics
| Founders | Alexander Dean, Yali Sassoon |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Snowplow Analytics provides enterprise-strength digital analytics across multiple platforms
Openplay
| Founders | Ian Pridham, Sam Parton |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
OpenPlay is an online platform that allows any sports facility to take online bookings, payments and manage their customers.
Kryotech
| Founders | Jean-Brunel Webb-Benjamin |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Kryotech is an App Development company.
Silicon
| Founders | Dominique Busso |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Silicon UK, is the authoritative UK source for news, features and reviews of business technology.
Flooved
| Founders | Hamish Brocklebank |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Flooved is a provider of interactive social e-textbooks with personalized content for students and professors.
ReportLab
| Founders | Andrew Robinson |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Report Lab builds solutions to generate rich, attractive and fully bespoke PDF documents at incredible speeds.
Rabbit Technologies
| Founders | Alexis Richardson |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Rabbit Technologies offers RabbitMQ which is open source message broker software implementing the advanced message queuing protocol (AMQP).
Mastodon C
| Founders | Bruce Durling, Francine Bennett |
| Follow | Website, 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
| Founders | Shahrukh Riaz |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Official SugarCRM and Salesforce Partners providing expert development and consultancy services.
NovaMining
| Founders | Mattia Pintus |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Blockchain start-up building solutions to improve criteria of transparency, quality, usability and compliance in crypto mining and exchange.
Patchstack
| Founders | Oliver Sild, Tauri Karson |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Patchstack is a website security and monitoring platform.
Easy Software Ltd.
| Founders | Filip Morávek |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Easy Software is an open source company in the field of business software.
Jmix
| Founders | Unknown |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Jmix is a high-level open source Java framework for the rapid development of enterprise applications.
Pandastream
| Founders | Unknown |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Pandastream is an open source video encoding solution.
Open Classifieds
| Founders | Chema Garrido, Marco A. Sánchez Alfaro |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Create Amazing Classifieds Websites
CO:CUBED
| Founders | Jeremy Basset |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
CO:CUBED helps FTSE100 companies to embrace the startup revolution, by defining and executing their collaborative innovation capabilities.
Postjer CMS
| Founders | Hudi Shehu, Ylli Merkohasani |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Postjer transforms your data, people, and organizations.
eSynergy Solutions
| Founders | Unknown |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
eSynergy Solutions offers businesses with recruitment services for developers, programmers, and engineers.
Curverider
| Founders | Ben Werdmuller, David Tosh |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Curverider develops socially-enabled software that allows organizations to increase knowledge-sharing and productivity.
Pharaoh Tools
| Founders | David Amanshia |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Open source, PHP, full-stack DevOps tools
SWCMS
| Founders | Damon Wirth |
| Follow | Website, 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
| Founders | Peter Delia |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Services for Integration & Mobility
Symbian Software Ltd.
| Founders | Unknown |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Symbian develops the operating system used on Nokia, Motorola and Samsung mobile and smart phones.
Caesar.Team
| Founders | Aleksandr Beshkenadze, Egor Tomilin, Evgeny Scherbak, Evgeny Smirnov |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Caesar.Team is the open-source password and document manager for teams
Squiz UK
| Founders | Unknown |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Squiz is a global technology and strategy business that drives digital transformation for its customers.
Blockware
| Founders | Henrik Hofmeister, Jacob Laurvigen |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Software Reimagined
The Xen Project
| Founders | Unknown |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
The Xen Project is an open-source virtualization platform that powers the world’s largest clouds in production.
Open-First
| Founders | Unknown |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Open-First specialize in helping companies of all sizes re-examine their communication, design, innovation, management and support.
ApiAxle
| Founders | Unknown |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
ApiAxle is a proxy software that manages network features and provides analytical data on network traffic.
Bacula
| Founders | Kern Sibbald |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Open source set of computer programs that permits the system administrator to manage backup, recovery, and verification.
Jaaz Portal
| Founders | Unknown |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Complete, out-of-box, automated web hosting solution licensed also as an Open Source.
Symbian Foundation
| Founders | David Wood |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Symbian foundation is a software licensing company that creates and licenses open operating systems for mobile phones.
skylable
| Founders | Alberto Wu, Edvin Torok, Luca Gibelli, Tomasz Kojm |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Open-source software-defined storage
Escrowblock
| Founders | Kevin Hollands |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Escrowblock is a platform that provides a gateway on the ethereum blockchain.
Oasis Loss Modelling Framework
| Founders | Unknown |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Oasis Loss Modelling Framework provides an open source catastrophe modelling platform.
Orchard
| Founders | Aanand Prasad, Ben Firshman |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Get a Docker host in the cloud, instantly.
Vorari
| Founders | Nagib Tharani |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Open Source Cloud SaaS Solutions
REDK Software Engineering
| Founders | Unknown |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Open Source solutions
Gephi
| Founders | Unknown |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Gephi is an open-source software for network visualization and analysis.
Jobberbase
| Founders | Filip Chereches-Tosa |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Jobberbase is an open-source job board platform that enables the creation of job sites on the internet.
AFKAR
| Founders | Fernando Sainz |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
An “Internet Of Things” Startup business.
LearnerShape
| Founders | Unknown |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
LearnerShape is an IT firm that offers learning solutions including learning infrastructure and custom training programs.
Juno Computers
| Founders | Giovanni Caligaris |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Linux laptops and computers
Open Source Living
| Founders | Unknown |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Open Source Living is an information and archive service for high quality Open Source software (OSS).
Anephenix
| Founders | Unknown |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Anephenix is a digital studio making web products and services.
CiviHR
| Founders | Unknown |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
CiviHR engages in the development of open-source HR software for non-profit organizations.
Lutra Consulting
| Founders | Unknown |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Lutra Consulting provides geographic information systems consulting services.
Aave
| Founders | Stani Kulechov |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Aave is an open source non-custodial protocol on Ethereum for decentralized lending and borrowing.
