AI Development Companies in UK: Top 10 for 2026
Choosing an AI development company in UK usually starts with a directory and ends with whichever names look familiar. The UK has more than 5,800 AI companies, according to the government's 2024 AI sector study, and name recognition says little about who will build and ship your system.
This list covers ten firms among the artificial intelligence companies in UK that deliver custom AI development to UK buyers, from London-headquartered engineering teams to global firms with UK delivery. Each one is profiled on the same company data, and Clutch reviews were checked on 19 October 2026.
How We Evaluated These AI Development Companies
We applied criteria that reflect what matters when you're hiring custom AI development in the UK:
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Active in the UK market, through a UK office or UK client reviews on Clutch.
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A team of 50 or more, enough to staff a multi-month AI build.
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At least 20 verified Clutch reviews, with a rating of 4.7 or higher.
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AI development, AI agents or generative AI named as a service on the firm's website and its Clutch profile.
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Custom engineering for clients, not an AI product sold as software.
AI Companies in UK at a Glance
| # | Company | Best For | Location |
|---|---|---|---|
| 1 | Classic Informatics | Custom AI, generative AI and AI agents built end to end | Gurugram, India (London office) |
| 2 | Opinov8 | AI built on cloud and data engineering, from a London-headquartered firm | London, UK |
| 3 | Old.St Labs | First AI-enabled products for founders and SMEs, with strategy, design and engineering in one team | London, UK |
| 4 | Dotsquares | AI consulting and development from a large team with a London head office | London, UK |
| 5 | Radixweb | AI integrated into existing enterprise software, for mid-sized and large organizations | UK / India |
| 6 | Innovify | AI product studio work for fintech, insurtech and health tech | London, UK |
| 7 | STX Next | Python-based AI and data engineering with delivery centres in Poland and Mexico | Poznań, Poland |
| 8 | Konstant Infosolutions | AI features inside mobile and web apps across many industries | Jaipur, India (UK delivery) |
| 9 | Binariks | AI for healthcare, fintech and insurance workflows | Torrance, USA |
| 10 | Vention | AI software development that needs a 1,000+ person firm | New York, USA |
1. Classic Informatics
Classic Informatics is an AI development company in UK, with a London office alongside its Gurugram headquarters. It builds custom AI and machine learning models, generative AI and LLM applications, AI agents and AI-powered automation. Since 2002 it has delivered 3,000+ projects for 1,000+ clients across 30+ countries, and 95% of its clients stay.
| Classic Informatics | |
|---|---|
| Year founded | 2002 |
| Headquarters | Gurugram, India |
| Employee count | 50–200 |
| Clutch rating | 4.9 (39 reviews) |
| Hourly cost | $25–$49/hr |
| Minimum project size | $25,000 |
| Classic Informatics | |
Strengths: Custom AI and ML model development, generative AI and LLM applications, and AI agent and automation builds.
Consider if: You want one firm to take an AI product from architecture to production, with a London office for in-person workshops.
2. Opinov8
Opinov8 is a London-headquartered British AI software company founded in 2017, with 300+ professionals across Europe, the Americas and the Middle East and North Africa. It describes itself as embedding AI across the engineering lifecycle, and its work covers data engineering, AI and machine learning, cloud and DevOps, from MVPs to enterprise platforms. Clients praise its technical depth and responsiveness.
| Opinov8 | |
|---|---|
| Year founded | 2017 |
| Headquarters | London, UK |
| Employee count | 250–999 |
| Clutch rating | 4.8 (24 reviews) |
| Hourly cost | $50–$99/hr |
| Minimum project size | $50,000+ |
| Opinov8 | |
Strengths: AI and machine learning with data engineering, cloud and DevOps, and agentic AI deployment.
Consider if: You want a London-headquartered firm that can build AI on top of cloud and data engineering.
3. Old.St Labs
Old.St Labs is a London digital product studio founded in 2020 by two startup founders, and one of the UK AI companies building first products for startups and SMEs. It blends product strategy, UX/UI design and full-stack development to create AI-powered products, web platforms, mobile apps and MVPs. It has delivered 50+ digital products across healthtech, fintech, education, real estate and logistics, among other sectors.
| Old.St Labs | |
|---|---|
| Year founded | 2020 |
| Headquarters | London, UK |
| Employee count | 50–249 |
| Clutch rating | 5.0 (23 reviews) |
| Hourly cost | $50–$99/hr |
| Minimum project size | $10,000+ |
| Old.St Labs | |
Strengths: AI-powered product builds, product strategy with UX/UI design, and MVPs for startups and SMEs.
Consider if: You're a founder or SME building a first AI-enabled product and want strategy, design and engineering from one London team.
4. Dotsquares
Dotsquares is an AI development company UK teams can meet in person, with a London head office, development centres in India and offices in the US and Australia. Founded in 2002, its AI offer covers custom AI development, AI consulting and strategy, AI-powered automation, chatbots and AI-driven business intelligence. Clients praise its project management and value for money.
| Dotsquares | |
|---|---|
| Year founded | 2002 |
| Headquarters | London, UK |
| Employee count | 1,000–9,999 |
| Clutch rating | 4.7 (101 reviews) |
| Hourly cost | $25–$49/hr |
| Minimum project size | $1,000+ |
| Dotsquares | |
Strengths: Custom AI development and consulting, generative AI and chatbots, and delivery from a team of 1,000+ people.
Consider if: You need a large team and a low entry point, with a $1,000 minimum project size.
5. Radixweb
Radixweb is an AI-first software engineering company that specializes in building custom AI solutions, enterprise software, and intelligent digital products. Backed by 26+ years of experience, it has delivered 4,500+ projects to 3,000+ clients, and its capabilities span custom AI development, generative AI, machine learning, and enterprise AI integration. Its 650+ AI engineers, solution architects, and domain specialists work with internal teams to build AI solutions that complement existing systems instead of replacing them.
| Radixweb | |
|---|---|
| Year founded | 2000 |
| Headquarters | Ahmedabad, India (UK delivery) |
| Employee count | 250–999 |
| Clutch rating | 4.8 (52 reviews) |
| Hourly cost | $25–$49/hr |
| Minimum project size | $25,000+ |
| Radixweb | |
Strengths: Generative AI, RAG and agent builds, LLM integration, and AI workflow automation.
Consider if: You're a mid-sized or large organization that needs AI integrated into existing software, with end-to-end engineering.
6. Innovify
Innovify is a London digital product studio founded in 2011, offering AI development services in UK from design through launch. It specialises in AI, fintech, insurtech, e-commerce, climate tech and health tech, with product managers, developers and UX/UI designers covering the full product life cycle. Clients credit its project management, on-time delivery and agile approach.
| Innovify | |
|---|---|
| Year founded | 2011 |
| Headquarters | London, UK |
| Employee count | 50–249 |
| Clutch rating | 4.7 (23 reviews) |
| Hourly cost | $50–$99/hr |
| Minimum project size | $25,000+ |
| Innovify | |
Strengths: AI-enabled product development, the full product life cycle from idea to launch, and fintech and insurtech delivery.
Consider if: You're building a new AI-enabled product and want one London studio to handle discovery and build.
7. STX Next
STX Next is a Poznań-headquartered AI engineering company founded in 2005, with delivery centres in Poland and Mexico. It describes itself as Europe's largest Python-focused digital engineering partner, and its AI development services run from proofs of concept to enterprise solutions, including generative AI and MLOps. Reviewers highlight its flexibility and project management.
| STX Next | |
|---|---|
| Year founded | 2005 |
| Headquarters | Poznań, Poland |
| Employee count | 250–999 |
| Clutch rating | 4.7 (103 reviews) |
| Hourly cost | $50–$99/hr |
| Minimum project size | $50,000+ |
| STX Next | |
Strengths: Python-based AI and data engineering, generative AI and MLOps, and cloud delivery.
Consider if: You want a firm built around Python, data and AI, with delivery centres in Poland and Mexico.
8. Konstant Infosolutions
Konstant Infosolutions is a mobile app, web and AI development company headquartered in Jaipur, India, with 23+ years of experience. Its bespoke AI development covers machine learning and generative AI, AI chatbots, computer vision and predictive analytics, alongside mobile and web builds across 15+ industries. Clients praise its responsiveness and value for money.
| Konstant Infosolutions | |
|---|---|
| Year founded | 2003 |
| Headquarters | Jaipur, India |
| Employee count | 250–999 |
| Clutch rating | 4.9 (173 reviews) |
| Hourly cost | $25–$49/hr |
| Minimum project size | $5,000+ |
| Konstant Infosolutions | |
Strengths: Generative AI and machine learning, AI chatbots and computer vision, and AI inside mobile and web apps.
Consider if: You want AI built into a mobile or web product, from a firm with 170+ client reviews.
9. Binariks
Binariks is a custom software firm headquartered in Torrance, California, and a generative AI development company for healthcare, fintech and insurance clients. Its AI practice also covers machine learning and computer vision, from anomaly detection to conversational tools. Reviewers praise its communication and technical skills.
| Binariks | |
|---|---|
| Year founded | 2016 |
| Headquarters | Torrance, USA |
| Employee count | 50–249 |
| Clutch rating | 4.9 (66 reviews) |
| Hourly cost | $50–$99/hr |
| Minimum project size | $10,000+ |
| Binariks | |
Strengths: Generative AI, machine learning and computer vision, plus AI anomaly detection and conversational tools.
Consider if: You're in healthcare, fintech or insurance and need AI built to fit regulated workflows.
10. Vention
Vention is a New York-headquartered engineering firm founded in 2002, with 1,000 to 9,999 people and a dedicated UK page for its AI software development services. Its client reviews span 16 industries. Clients praise its project management, technical expertise and communication.
| Vention | |
|---|---|
| Year founded | 2002 |
| Headquarters | New York, USA |
| Employee count | 1,000–9,999 |
| Clutch rating | 4.9 (103 reviews) |
| Hourly cost | $50–$99/hr |
| Minimum project size | $50,000+ |
| Vention | |
Strengths: AI software development for UK clients, delivery across 16 industries, and the capacity of a 1,000+ person firm.
Consider if: You're sizing a programme that needs a large team and can absorb a $50,000 minimum.
How to Choose an AI Development Company in UK
Five checks separate a good shortlist from an expensive mistake.
1. Relevant Experience
Look for delivery in your sector and at your scale. Ask for two client references you can call.
2. Build or Advise
Advisory firms hand over a plan. Engineering firms build it and keep it running, so ask any AI development company UK buyers rely on to show a system that's still in production.
3. Data and IP Ownership
Get it in writing who owns the models, the data pipelines and the code. Ask where your data is processed and whether any of it trains shared models.
4. Team and Communication
Ask who will work on your project, how often you'll review progress and how time zones are handled.
5. Pricing and Integration
AI development services in UK are priced on scope, so ask each firm for a fixed-scope estimate on the same brief.
For a UK cybersecurity provider, we built a multi-tenant vulnerability management platform for its network of managed service providers. In our experience, buyers underestimate integration with existing systems, so ask each firm for a past example.
Let's Sum Up!
The right AI development company in UK is the one that has already built something like yours, puts in writing who owns the models and the data, and quotes a clear scope.
The ten firms above are a place to start. Some are headquartered in London and some serve UK clients from abroad, and they range from teams of 50 or more to firms with over 1,000 people, so match the size and focus to your project.
Narrow the list to three. Ask each for client references in your sector, a fixed-scope estimate on the same brief and written confirmation of who owns the code. The answers will show you which firm has done this before.
FAQS
Frequently Asked Questions
There's no single best, because the right pick depends on your stack, your sector and your size. Among these top 10 AI companies in UK, Opinov8, Old.St Labs, Dotsquares and Innovify are headquartered in London, and STX Next is built around Python, data and AI. Classic Informatics suits teams that want custom AI built end to end. Shortlist three and test each against the five checks.
