Top Tech Companies in London (8,305)
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Optiver’s story began over 30 years ago, when we started business as a single trader on the floor of Amsterdam’s options exchange. Today, we are at the forefront of trading and technology as a leading global electronic market maker, focused on pricing, execution and risk management.
Optiver's Top Stability & Growth Strengths
Strong Market Position & Advantage: Optiver is widely recognized as a leading global market maker, with pronounced strength in European equity derivatives and a consistent top-tier presence on venues like Eurex. Awards and exchange recognition, along with leadership in several listed options products, reinforce durable competitive positioning.
Strong Revenue Growth: Net trading income increased in 2024 and again in 2025, with the company highlighting defended or increased share in highly competitive markets. This trajectory points to expanding top-line capacity supported by broad, multi-asset participation.
Profitability: Reported net profit rose across 2024–2025 alongside a larger equity base. These outcomes signal strong earnings power during recent market conditions.
Adam Smith International is a global advisory and international development company. It works locally with governments, foundations, companies, international organisations, businesses, and civil society to strengthen economies, stabilize societies, and improve government effectiveness. The employee-owned firm designs, delivers, and evaluates tailored strategies and programmes addressing major global challenges across countries at all stages of development, including complex, fragile, and developing...
For more than 40 years, Kx Advisors (operating as Kaiser Associates’ Healthcare Practice) has provided strategy consulting services to help healthcare executives achieve critical business growth goals. With a highly collaborative approach they have developed pragmatic solutions for leading pharmaceutical, biotechnology, medical device, health IT, digital health, and diagnostics clients, with data-driven insights to give those clients the tools to...
Puzzel is a leading cloud-based contact centre software provider and CX ecosystem that combines omni-channel technology and AI to deliver comprehensive customer interaction solutions, enabling businesses to provide exceptional customer service.
Nova Founders Capital invests in and builds sustainable large-scale business models in rapidly growing internet markets. We are very disciplined company builders and investors and understand how to efficiently grow companies. Our companies receive the continuous financial and operational support they need to be successful. Examples of companies we have founded include www.compareasiagroup.com (the leading financial platform in Asia), www.lionandlion.com (leading...
We’ve recently renamed our wider business to ‘Houseful’, which is why the name might be new to you. By doing so, we can now showcase the breadth of our brands and connected capabilities that are driving progress in the property industry. Houseful is the leader in residential property software, data and insight - owning and operating a family of trusted...
UTA unites ideas, opportunities and talent. The company represents some of the world’s most iconic, barrier-breaking artists, creators and changemakers—from actors, athletes and musicians to writers, gamers and digital influencers. One of the most influential companies in global entertainment, UTA’s business spans talent representation and content production, as well as strategic advisory and marketing work with some of the world’s...
United Talent Agency's Top Stability & Growth Strengths
Strong Market Position & Advantage: Industry coverage consistently places UTA among Hollywood’s “big three” with CAA and WME, a position reinforced after CAA’s acquisition of ICM narrowed the field. The agency is cited as a leader across segments including sports, creators/brand marketing, news/broadcast, and books-to-screen.
Market Expansion: UTA has expanded through acquisitions and geography, including MediaLink (2021), Curtis Brown (2022), Fletcher & Company (2023), JUV/Next Gen (2024), and ROOF (2024), plus moves like the Atlanta office and a renewed long-term HQ lease. Sports growth via Klutch and ROOF and the build-out of entertainment marketing signal continued international and cross-vertical scaling.
Diversified Revenue Streams: The platform spans film/TV, music, sports, books, creators, games, branding/licensing, speaking, and marketing/advisory. Additions like MediaLink and JUV deepen brand/CMO-facing capabilities, while Curtis Brown and related publishing assets strengthen IP origination and book-to-screen pipelines.
The Adaptavist Group is a global family of companies with one common goal: to make business work better. We combine the best talent, technology, and processes to make it easier for our customers to excel–today and tomorrow. We are experts at delivering innovative software, tailored solutions, and quality services across some of the world’s most trusted technology ecosystems, including Atlassian,...
Arondite is a defence technology building the foundational software and AI to power the autonomous age. We're hiring world-class engineers who share our values and who want to make a difference. If you're interested in joining us then check out the latest roles on our website.
Gemba Advantage designs and builds high-impact, secure, scalable, and sustainable software solutions, focusing on user-centric, cloud-native products for the public sector and social good.
Fonoa is a global tax automation and compliance solution provider that helps companies streamline the entire transactional chain. We empower digital businesses to easily handle tax compliance with solutions like tax calculations, invoicing, tax ID validations and more – all from one platform. With Fonoa, your company can: - Instantly validate tax ID numbers from 95+ countries - Report transactions in accordance...
Fonoa's Top Stability & Growth Strengths
Investor Backing & Capital Strength: A recent $110M Series C alongside the acquisition of PwC’s Indirect Tax Edge indicates strong capital support and balance‑sheet resilience. These moves align with consolidation of capabilities and an ambition for category leadership.
Product Line Growth: The platform has expanded from validation and calculation into e‑invoicing, real‑time reporting, and filings, reinforced by integrating PwC’s Edge. New modules and broadened compliance scope suggest active roadmap investment.
Strong Market Position & Advantage: Fonoa is portrayed as an emerging leader for API‑first global indirect tax and e‑invoicing in digital platforms and marketplaces, with visible enterprise traction such as Booking.com Transport. Reported implementation speed and high invoice acceptance indicate effective execution at scale in its target segment.
Zanders is a global financial consulting firm specializing in treasury management, financial risk, and technology. Headquartered in the Netherlands, it provides advisory, technology, and implementation solutions to multinational corporations, financial institutions, public-sector organizations, and NGOs. Its services help clients improve treasury and risk operations, navigate corporate finance complexity, adopt technology, and pursue environmental, social, and governance objectives across global markets....
Move and manage capital seamlessly across banks, blockchains, and borders. Velocity is an enterprise-first platform that combines the programmability of stablecoins with the rigour of traditional finance — solving real-world challenges in cross-border settlement, liquidity, and treasury.
Alfa (formerly CHP Consulting) has been delivering systems and services to the global asset and automotive finance industry since 1990. Our best practice methodologies and specialised knowledge of asset finance mean that we deliver the largest system implementations and most complex business change projects. With an excellent delivery history over our 27 years in the industry, Alfa's track record is unrivalled. Alfa...
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Jellyfish is a new kind of marketing performance company for the platform world, where success demands a creative, multi-platform mindset. We help brands thrive, by navigating, connecting, and harnessing the platforms that drive growth. We’re more than the same logo over every door. Our unique global structure combines platform understanding with tech, media, creativity, and data expertise. We make amazing...
Jellyfish (jellyfish.com)'s Top Stability & Growth Strengths
Strategic Partnerships: Long‑standing Google Marketing Platform/Google Cloud relationships are reinforced by repeated Google Cloud Training Partner of the Year recognition and regional GMP Partner of the Year wins, alongside Amazon Ads DSP reseller status and participation in Walmart Connect’s partner network. A joint initiative with Google Cloud to bring newer AI models and partner case studies further underline depth in the Google ecosystem.
Innovation-Driven Growth: AI‑enabled production and new AI‑led offerings (such as an AI‑powered media in‑housing platform and agent solutions) appear alongside expanded training credentials and multiple innovation awards. These moves indicate ongoing investment in platform‑native, data/AI‑driven execution.
Strong Market Position & Advantage: The company is portrayed as a major player and credible leader in digital‑first, platform‑centric marketing with global reach under The Brandtech Group, supported by blue‑chip partnerships and recognized work. Leadership signals are strongest around Google/Amazon‑centric enablement and training where repeated recognitions are documented.
At Kocho, we believe greatness lies in everyone. That’s why we exist, to help ambitious companies realise their potential. By combining the power of Microsoft cloud with identity, mobility, connectivity, and cyber security services, with our team of truly talented people, we take our clients on a journey of secure transformation. And we’re with you every step of the way. Because...
Ryan is a tax services firm providing tax advisory and consulting services on a multi-jurisdictional basis. Ryan, an award-winning global tax services and software provider, is the largest Firm in the world dedicated exclusively to business taxes. With global headquarters in Dallas, Texas, the Firm provides an integrated suite of federal, state, local, and international tax services on a multijurisdictional basis,...
Ryan's Top Stability & Growth Strengths
Strong Market Position & Advantage: Feedback suggests Ryan is widely viewed as a top-tier specialist in business tax—especially state and local tax, credits and incentives, property/indirect tax recovery, and tax-technology implementation. It was also named a Top 10 provider for tax engine implementations in 2025, reinforcing niche leadership.
Market Expansion: Feedback suggests recent acquisitions and international moves (e.g., majority stake in Dhruva Advisors and the European VAT Desk deal) have expanded geographic reach and VAT/indirect tax capabilities across India, the Middle East, and Europe. Added offices and strengthened property-tax presence indicate a deliberate buy-and-build approach.
Investor Backing & Capital Strength: Feedback suggests a new minority investment by Neuberger Berman alongside existing sponsors (Onex and Ares) provides capital support for continued expansion in consulting, software, and international markets.
Insider One is the #1 platform that brings everything marketing and customer engagement teams need in one place so they can reach their peak potential and become unstoppable. With AI at its core and an integrated Customer Data Platform (CDP), Insider One unites data, personalization, and journey orchestration across the most extensive set of natively supported channels, including WhatsApp, SMS,...
Insider One's Top Stability & Growth Strengths
Strong Market Position & Advantage: Insider One is repeatedly described as being placed in leader tiers by major analyst evaluations for personalization/experience optimization and AI-enabled marketing platforms, alongside strong category placement in G2 grids. The rebrand positions the company as a “complete customer engagement platform,” reinforcing an ambition to compete across a broader platform scope.
Investor Backing & Capital Strength: Multiple large funding rounds are cited, including a substantial Series E intended to accelerate AI investment and U.S. expansion. These raises are presented as consistent with a scale-up trajectory and capacity to fund growth initiatives.
Market Expansion: The data references U.S. expansion focus, global footprint across many offices, and investments planned in new geographies as indicators of continued scaling. Customer-count claims and reported new-customer additions are presented as signals of expanding adoption.
Glassworks London is an independent, London-born women’s fashion retailer founded in 2010. The company designs and sells quality, limited-edition fashion through brick-and-mortar stores and ecommerce, supported by sourcing, product, marketing and fulfilment operations. Its weekly small-batch drops create newness while reducing end-of-season waste, and its retail model combines design-led boutiques with digital shopping and customer-focused styling experiences throughout the customer...
WGSN is the global authority on consumer trend forecasting. We help brands around the world create the right products at the right time for tomorrow’s consumer. WGSN's trusted consumer and design forecasts power outstanding product design, enabling our customers to create a better future. Our services cover consumer insights, beauty, consumer tech, fashion, interiors, lifestyle, food and drink forecasting, data...
