Top Developer tools companies in London

IDEs, runtimes, frameworks, and platforms built primarily for engineers. Filtered to companies headquartered in London.

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Built from a search like: “Top Developer tools companies in London”

Ranked by current headcount across Developer tools companies headquartered in London. Refreshed monthly.

1
Retired· London, England, United Kingdom
!
- 19k employees
2
PedidosYa· Cordon, Palermo, Parque Rodo, Montevideo, Uruguay
We’re the delivery market leader in Latin America. Our platform connects over 77.000 restaurants, supermarkets, pharmacies and stores with millions of users. Nowadays we operate in more than 500 cities in Latinamerica. And we are now over 3.400 employees. PedidosYa is available for iOS, Android and Windows Phone operating systems and downloads are now over 20 million.
- Series unknown
- 15.3k employees
- Founded 2009
3
Pharma Solutions Hub· London, England, United Kingdom
Pharma Solutions Hub partners with pharmaceutical and biotech startups to accelerate product development, secure sensitive data, and modernise R&D operations. We deliver custom software, AI pipelines, cloud engineering, and cybersecurity built for regulated environments. Our team combines software engineering, data science, and compliance expertise to create reproducible, auditable systems that speed discovery, protect IP, and keep clinical data safe. Follow this page for practical guides, technical playbooks, case studies, and security checklists that help founders, CTOs, and technical teams move faster and safer.
- 15k employees
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4
Deliveroo· London, England, United Kingdom
Deliveroo is an award-winning delivery service founded in 2013 by William Shu and Greg Orlowski. Deliveroo works with approximately 176,000 best-loved restaurants and grocery partners, as well as around 150,000 riders to provide the best food delivery experience in the world. Deliveroo is headquartered in London, with offices around the globe. Deliveroo operates across 9 markets, including Belgium, France, Italy, Ireland, Qatar, Singapore, United Arab Emirates, Kuwait and the United Kingdom.
- Post-IPO equity
- 11.5k employees
- Founded 2013
5
Game Developer· London, England, United Kingdom
The game developer is a global community of people who are passionate about making games. It includes people of all skill levels, from beginners to experienced professionals. The community is a great resource for game developers to learn, share ideas, and get help from others.
- 8.5k employees
- Founded 2015

6
Dentist Community· London, England, United Kingdom
Revolutionise your practice with AI-powered diagnostics. Identify cavities, gum disease, and other oral issues with unprecedented accuracy, saving time and improving patient care.
- 7k employees
7
Travel AI· London, England, United Kingdom
Unleash the magic of personalised travel. Discover hidden gems, book with ease, and create memories that last a lifetime.
- 6.3k employees
- Founded 2022
8
FinTech Foundry· London, England, United Kingdom
// FinTech Foundry is currently operating in a private development.
- 5.8k employees
9
Self Employed Hub· London, England, United Kingdom
Shopify is a Cloud-Based E-Commerce Platform that allows businesses to set up an Online Store with little to no hassle.Shopify has the capability to be the most powerful platform that exists, however sometimes it requires expert development and Shopify developer knowledge to enable it's most advanced features.As an award winning eCommerce development agency, we build with performance, efficiency and best customer experiences. From creating unique themes that capture a brand’s essence, to building engaging online storefronts that immerse the customer with one-of-a-kind browsing experience.
- 5.4k employees
10
ION· London, England, United Kingdom
We’re visionary innovators who are delivering mission-critical trading and workflow automation software to financial institutions, corporations, central banks, and governments. By combining our passion for automation with a strategic view on the industries we serve, we design solutions that improve decision-making, simplify complex processes, and empower people. Simply put, we help our customers do more, faster and better than before. We believe our investments in research and development are shaping the future of automation and enabling our customers to transform their business. And we embrace the power of community, working with each other and with our customers to succeed through a positive culture of continuous improvement.
- 5.4k employees
- Founded 1998

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Find engineers at Developer tools companies in London

London has long been a hub for Developer tools, and the list above ranks the largest Developer tools companies headquartered there by current headcount, drawn from public LinkedIn and Crunchbase records. With 2,227 matching companies in Refolk’s index, this is a good map of where the Developer tools talent in London lives - useful whether you’re recruiting, partnering, or sizing a market.

The biggest Developer tools companies in London tend to be the gravitational centres for specialised talent - senior engineers, ML researchers, applied scientists, designers - while the smaller ones compete on speed, equity, and proximity to founders.

Refolk converts this list into a live search. Ask for “Developer tools engineers in London hiring senior staff” or “founders of Developer tools companies in London who left in the last 12 months” and Refolk returns a ranked shortlist with the evidence that earned each person a spot.

How this list is built

Refolk pulled Developer tools companies headquartered in London from public LinkedIn and Crunchbase records, ranked them by current employee count, and kept those with at least 10 employees. The list refreshes monthly.

Last refreshed: Thu, 29 Oct 2026 03:09:43 GMT

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How is this ranking built?

The list draws on the public company graph - headcount and growth signals, funding history, and recency. The criteria chips at the top show exactly which filters produced it, and the methodology section explains the ranking.

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