Best Web App Development Platforms in the UK of 2026

Retool

Retool is an AI-powered platform that enables teams to build internal software, agents, and workflows faster using natural language and composable building blocks. It allows users to go from a simple prompt to a fully deployed application that works with their existing data, systems, and business rules. Retool connects seamlessly to databases, APIs, LLMs, and external tools to create production-ready applications. The platform supports building AI agents, dashboards, workflows, and full-stack internal apps with flexibility and control. Teams can design interfaces visually, customize logic with code, or generate components using AI assistance. Retool integrates with modern developer workflows, including version control, CI/CD, and testing. Overall, it helps organizations reduce development time while maintaining enterprise-grade security and reliability.

567 Ratings

Starting Price: $10 per user per month

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GW Apps

GW Apps delivers responsive, cloud-based web applications without traditional coding. Build secure, data-driven apps featuring dashboards, forms, and automated workflows, all managed through a visual interface. Role-based permissions, audit trails, and scalable architecture make deployment and ongoing changes straightforward, helping organizations launch and evolve web apps quickly with minimal IT overhead.

37 Ratings

Starting Price: $99/month / 15 users & 3 apps

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Alpha Anywhere

Alpha Software Corporation

Alpha Anywhere is the only development platform with both low-code and no-code capabilities. Developers can rapidly create secure, cross-platform mobile and web business apps. Alpha leads in offline development, ensuring that data can be captured AND accessed (database lookups/media file retrieval) offline. A powerful bi-directional API can integrate with existing systems of record and workflows, tie into web services, and meet advanced security requirements. Offers: - pre-built templates - full-stack development - sophisticated analytics/dashboards - full-stack development - scale-able, secure, and reliable cloud deployment Professional developers and citizen developers can use the Alpha TransForm mobile forms builder to digitize paper forms in minutes. Offers offline operation, built-in analytics, and unmatched speed, power, and flexibility in the no-code segment.

8 Ratings

Starting Price: $0

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Intellimas

Singletree Technologies

Intellimas is a highly configurable, no code/low code solution with spreadsheet features. This allows you to build a variety of web applications that end users will love. Intellimas is built for fast data entry, analytics, exception management, and easy retrieval of live data from other systems, if required. The grid UI allows for an easy transition from spreadsheets. This comprehensive view, along with our new form view, provide you with the flexibility to handle unlimited end uses. Intellimas is deployed on-premise or in the cloud. Companies typically implement Intellimas for one business application and usually find several others for it in a short period of time. Reach out to us for a demo and ask us about our free trial!

Starting Price: $38/Month

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DHTMLX

DHTMLX is a JavaScript UI library that provides a set of highly customizable and flexible components for building modern and responsive web applications. The library includes more than 30 UI components, such as Gantt, Scheduler, Kanban, diagrams, charts, grids, spreadsheets, calendars, trees, forms, and more. DHTMLX helps to advance web development and build feature-rich data-intensive applications of any complexity. One of the key advantages of DHTMLX is its compatibility with different web frameworks, including React, Angular, and Vue.js, which makes it a great choice for developers who are already working with these frameworks. DHTMLX is also designed with performance in mind. Its components are optimized for fast rendering. A comprehensive and rich API provides a straightforward way to manipulate JavaScript/HTML5 UI widgets. The library has detailed API documentation, tutorials, and examples that help developers quickly get up to speed and start building their apps.

Starting Price: $79

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Firebase

Google

Firebase helps you build and run successful apps. Backed by Google and loved by app development teams - from startups to global enterprises. Products and solutions you can rely on through your app's journey. Install pre-packaged, open-source bundles of code to automate common development tasks. Easily integrate Firebase with your team’s favorite tools. Use Firebase products together to solve complex challenges and optimize your app experience. Personalize your onboarding flow, grow user engagement, or add new functionality with Firebase. Firebase provides detailed documentation and cross-platform SDKs to help you build and ship apps on Android, iOS, the web, C++, and Unity. Learn how to create a Firebase project, register apps to it, and integrate the Firebase SDKs for your products and platform: iOS, Android and Web. Learn about Firebase projects, including concept overviews, deep-dives into topics like project permissions and project management tools, or preparing to launch your app.

39 Ratings

Starting Price: $24.99 per month

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RadSystems

RadSystems is a robust integrated development environment tool and Low-code software that facilitates rapid application development process by reducing redundant coding time. RadSystems applications can be generated through ASP.NET Core, Python Flask, PHP Laravel, Node Express.js, Vue.js, and Quasar Framework. You can also build traditional or classic web applications using Bootstrap, jQuery, and Laravel. RadSystems Studio is a robust Low-code software that facilitates a rapid application development process by reducing redundant coding time. Through its complex engine algorithm, it is possible for an application to be generated in several programming languages from a single code base. You can publish your application to Classic Application, Single Page Application, Progressive Web Application, and Mobile Application with a single click.

22 Ratings

Starting Price: $298

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CaptainCasa Enterprise Client

CaptainCasa

Rapid development and cost-effective maintenance of web applications with server-side Java. The developer uses only this most widely used development language; no html, css or javascript knowledge is required for frontend programming. Unique clear separation of UI design and logical processing. Integration of Java business logic into the design through expression language and event control. Numerous and exceptional components serve a unique overall look; unlimited use of additional CSS or JavaScript on design side. Of course, the developed applications can also be hosted on Microsoft Azure or AWS (Amazon Web Services); the developed applications can also be used in-house with simple deployment. CaptainCasa Enterprise Client protects against hidden costs and provides long-term protection of your software development investment.

7 Ratings

Starting Price: Free

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Appery.io

Appery

Appery.io is a low-code app development platform that makes creating hybrid mobile apps, web apps, and progressive web apps (PWAs) easy. Creating a custom app UI has never been easier. Leverage the speed of drag-and-drop functionality and the power of JavaScript to turn your idea into a complete application in days instead of months. Appery.io is a web, PWA, and mobile app development platform. Cross-platform applications built with Appery.io will work smoothly and look great across all popular devices and operating systems. Submit mobile apps to the App Store and Google Play, or deploy them as web apps and PWAs, all with a single codebase. Our low-code app development platform is easy to master even for total beginners. Seasoned app developers, on the other hand, will continue working with the frameworks they love, such as Ionic and Angular, augmented with visual tools to boost their productivity.

5 Ratings

Starting Price: $30 per month

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Ionic

Drifty

The Ionic Platform allows you to bring your apps to market faster with an integrated app platform built on the leading cross-platform mobile SDK. Build, secure, and deliver new mobile apps—and transform existing ones—across iOS, Android, and Web platforms from a single codebase. Full scalability—Grow from prototype to production to enterprise-scale, without having to think about capacity, reliability, or performance. Better apps, everywhere—Slash your development time and costs with a platform that lets you write once and deploy anywhere—iOS, Android, and Web. The core of the Ionic development experience is Ionic Capacitor, a cross platform native runtime that runs equally well on native iOS and Android mobile devices, as well as any web browser. The big difference is that, unlike traditional native development or cross-platform approaches, the UI of a Capacitor app runs primarily in the browser.

5 Ratings

Starting Price: Free

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PerfectApps

PerfectApps puts the power to create completely customized no-code solutions in your hands. Subject matter experts can build enterprise-ready web apps, web forms and reports in days or weeks instead of months – without coding. Using a visual designer, simply drag & drop pre-coded elements on a canvas to build the entire application. The no-code approach removes coding as a barrier between ideas and solutions. With our no-code development platform, you can: • Build & deploy web apps, web forms and reports • Automate simple or complex workflows • Send automated notifications and escalations • Create impressive drill down reports with data grids, graphs, & charts • Get full visibility to your workflow processes • Integrate with LDAP, databases and other 3rd party apps • Host in the Cloud or on your servers

4 Ratings

Starting Price: $500 per month

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Oracle APEX

Oracle

APEX is Oracle’s world’s most popular low-code application platform that enables you to build scalable, secure cloud, mobile or desktop apps, with world-class features, that can be deployed anywhere – whether in the cloud or on-premises. Using APEX, developers can quickly develop and deploy compelling apps that solve real problems and provide immediate value. You don’t need to be an expert in a vast array of technologies to deliver sophisticated solutions. Focus on solving the problem and let APEX take care of the rest.

3 Ratings

Starting Price: $0

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Kissflow

Kissflow is an easy-to-use, low-code platform for custom application development tailored to business operations. Kissflow empowers process owners and IT developers to automate and build processes and applications for internal business operations. We help solve two main challenges in the enterprise: The first is the custom application backlog. Enterprise IT teams say “not now” to most custom application requests from business teams. While important to a department, they aren’t vital enough to engage limited IT bandwidth. Kissflow gives internal developers a hyper-fast platform to build various applications quickly. The second is starting a citizen development program. Process owners are scattered throughout the organization and need a standard, approved, and governed way to build automated applications that are a step up from spreadsheets. With its simple no-code design, patented rules engine, and comprehensive governance module,

2 Ratings

Starting Price: $1500 per month

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Claris FileMaker

Claris

Build apps like a boss. Take on digital transformation with Claris FileMaker. Quickly build custom apps that solve your business problems today — and tomorrow. Accelerate your business, unlock your team’s creative potential, and drive to better outcomes. Need an app to solve a really sticky business problem? Build it with FileMaker. It’s got all the tools you need to roll up your sleeves and DIY — or team up with pro developers for next-level expertise. And by today, we mean today. With built-in templates, drag-and-drop design, and an intuitive graphical UI, you’ll be app-building in no time. And your work goes live the second you’re ready, across every device — that’s the power of FileMaker. Need an app now but crunched for time? Odds are you’re not alone. Explore Marketplace to find the perfect jumping off point for your own custom app — from templates and components to fully-completed vertical market apps.

2 Ratings

Starting Price: $21 per user per month

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Neptune DXP

Neptune Software

Neptune Software's leading low-code app development platform - Neptune DXP – digitizes and optimizes business processes and user interfaces – at scale and with ease. Neptune DXP offers enterprise mobility, as well as the best low-code app development for SAP customers with the choice of no-code/low-code app development. The platform gives IT departments the right tools to build the apps they need. Neptune DXP provides a fast, cost-effective, and future-proof way to industrialize the development of custom applications (especially SAP Fiori, SAP mobile applications), turning your IT organization into an app factory, saving time and money on enterprise app development, app integration, and enterprise app operations.

2 Ratings

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Microsoft Power Apps

Microsoft

Now everyone can quickly build and share low-code apps with Microsoft Power Apps. Increase agility across your organization by rapidly building low-code apps that modernize processes and solve tough challenges. Empower your team to start building and launching apps right away using pre-built templates, drag-and-drop simplicity, and quick deployment—then roll out continuous improvements as needed. Give everyone the power to build the apps they need with advanced functionality previously only available to professional developers—including pre-built AI components. Provide professional developers the tools to seamlessly extend app capabilities with Azure Functions and custom connectors to proprietary or on-premises systems. Connect your apps to hundreds of data sources using a library of more than 260 connectors and Common Data Service —bringing your data together for a single source of truth while you modernize processes as well as customize and extend Office 365, Dynamics 365 etc.

2 Ratings

Starting Price: $20 per user per app per month

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EASA

EASA has a unique approach to deploying existing, Excel spreadsheet-based tools as secure, custom web applications. These apps can be deployed within a web portal for use by internal or external staff, including partners, resellers, suppliers or customers as well as subscription based applications (SaaS). Unlike competing solutions, sophisticated spreadsheets with VBA, macros and add-ins can be deployed with EASA. Furthermore, EASA provides full database functionality, approvals and notifications and integration with CRM and ERP systems. Common use-cases include the deployment of spreadsheets used for CPQ (configure price quote), insurance raters, financial analytics, engineering calculations, and many more. Your existing spreadsheet becomes the “engine” for the web app, eliminating any need to extract the logic and reprogram in a separate solution. If your company has made a significant investment into critical spreadsheets, then learn why AIG, Voya, HP and others rely on EASA.

2 Ratings

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AWS Amplify

Amazon

Fastest, easiest way to develop mobile and web apps that scale. AWS Amplify is an end-to-end solution that enables mobile and front-end web developers to build and deploy secure, scalable full stack applications, powered by AWS. With Amplify, you can configure app backends in minutes, connect them to your app in just a few lines of code, and deploy static web apps in three steps. Get to market faster with AWS Amplify. Use the Amplify CLI guided workflows to set up best-in-class backends for authentication, storage, APIs, and other common use cases in minutes. With AWS, your app scales automatically and transparently, with built-in best practices for security, reliability, and global availability and access to the underlying resources in the AWS console. Use Amplify Libraries to connect new or existing cloud backends to your mobile and web app. Supports Android, iOS, React, Flutter and more. Add features such as auth (Amazon Cognito), storage (Amazon S3), data, AI/ML, and more.

2 Ratings

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Thunkable

Web-based solution that helps businesses develop applications through component library, live tests, event blocks, and more. Design beautiful and powerful native apps on Thunkable without coding. Publish your app on Android, iOS, and the Web. Incubated at Google and MIT, backed by YCombinator. One project, three cross-platform apps, no coding. Add motion and smooth transitions to your app with lottie animations. On Thunkable, every app project is automatically created as a native Android app, native iOS app and mobile web app (on any platform), it's pretty magical. Start with a new project, or customize an existing sample app from our growing gallery of open sourced projects. Thunkable has an amazingly active and engaged community to help you with all your app building questions. We also offer live-chat support. Build your own apps by dragging and dropping your favorite components and connecting them together with blocks.

1 Rating

Starting Price: $15/mo

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TSQL.APP

UX1 BV

TSQL.APP is a web-based SQL platform for building data-driven applications directly within SQL Server. Featuring a built-in IDE, it enables developers to create responsive web apps using SQL for backend logic and UI interactions. Key features include: Dynamic UI Components: Cards represent database records in list and form views, with customizable modals for inputs, alerts, tables, and real-time reports. Action Scripting: SQL-based action scripts define app behavior, enabling CRUD operations and complex workflows. Real-Time Interactivity: Reports auto-refresh, and audio/visual alerts provide instant user feedback. Security and Accessibility: Supports secure logins, cloud access, and file management through meta tables. Extensibility: Integrates with .NET CLR for advanced operations. TSQL.APP is ideal for building adaptable business apps with responsive data handling, streamlined workflows, and custom user interactions.

1 Rating

Starting Price: €220 5 Developers/Users

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OutSystems

OutSystems is the number one low-code platform that is specifically designed to help users build and deliver better apps faster. Combining the power of low-code development with advanced mobile and enterprise integration capabilities, OutSystems enables users to visually develop and manage their entire application portfolio, stage interdependent apps and components, seamlessly integrate with existing systems, and streamline DevOps processes.

1 Rating

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AppGini

BigProf Software

AppGini helps you develop responsive web database applications instantly. You do not need to have any programming background to use it. Just define your database, set some options, click the Generate button, and you're done! And because these improvements are all based on the valuable feedback of thousands of users, AppGini has become an outstanding data management product essential for small businesses, freelancers and database developers. Messages plugin allows your AppGini app users to easily and securely communicate without leaving the app, and without having to exchange emails/contact info. This is done through an intuitive webmail-like interface, except it doesn't have the annoying distractions of email ads and spam. And you have full control over which users/groups are allowed to communicate together. Mass update plugin makes it very easy to apply a change to multiple records at once. Update order statuses, invoice payments, task priorities.

1 Rating

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Adalo

Apto Labs

Turn Your Startup Idea Into Reality Without Coding! Gone are the days of searching for the perfect developer to bring your ideas to life. Automatically add interactions and database configuration without any code... or if you’ve already got your API, Adalo can integrate with that. Gone are the days of searching for the perfect developer to bring your ideas to life. Automatically add interactions and database configuration without any code... or if you’ve already got your API, Adalo can integrate with that. The best makers iterate the fastest. Now you can afford to. After hiring designers and developers, most entrepreneurs don’t have any money left to iterate on their products, so they cross their fingers and hope. With Adalo, you’re in complete control to add, adjust, or even build a new app. Our company is named after Ada Lovelace, widely considered to be the world’s first computer programmer.

1 Rating

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Joget DX

Joget, Inc.

Joget offers an open-source, AI-powered platform that converges no-code/low-code development with AI to rapidly build and customize enterprise applications at scale. By combining AI with visual app builders—not raw code—Joget makes app generation faster, safer, and more accessible. With Generative AI and Agentic AI capabilities, Joget Intelligence enables organizations to automate and enhance processes while maintaining oversight and compliance. Unlike typical AI code generation, Joget's visual-first approach ensures applications are maintainable and governed within collaborative human workflows. As an Application and Integration Fabric, Joget connects legacy and modern systems seamlessly. Its extensible, open-source core and plugin architecture offer unmatched flexibility, and its White Label solution allows OEMs and digital solution providers to fully rebrand the platform. Trusted by startups, global enterprises, and government agencies across the globe.

Starting Price: $5/user/month

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UI Bakery

A low-code platform for creating internal tools visually. Allows people with basic web app development understanding to build beautiful UIs, connect data sources to it, publish & share apps securely. Have a customizable Design System under the hood. Have a variety of predefined widgets, UI components, free app templates and dashboards. Features: - Autogenerate UI components - Connect, read, write data - Create workflows & business logic - Add custom JavaScript code - Debug and test apps - Publish your web app

Starting Price: $10/user/month

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GeneXus

Globant

Simplify and Automate Software Development with GeneXus GeneXus is a Low-Code Platform powered by AI that simplifies and automates software creation. By modeling instead of coding, it generates complete solutions—from user interfaces to backends—faster and with less complexity. With 35+ years of experience, GeneXus helps enterprises build scalable, AI-driven systems, modernize legacy software, and adapt to new technologies without rework. It supports development across web, mobile, and desktop platforms, seamlessly integrating databases, APIs, and enterprise systems. Trusted in over 50 countries, GeneXus is a leader in the low-code market.

Starting Price: $0

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Hope UI

Iqonic Design

As the name suggests, Hope UI is the revolutionary admin dashboard built with the developer's aspirations and needs in the first place. Hope UI Laravel Admin Dashboard Template and UI component set is designed with a modular component structure to help design and launch web applications in the fastest way possible. Being able to develop lightweight web applications and admin panels, Hope UI Admin Template comes with a Live Customizer to cut down on development time and coding hours. The Hope UI Bootstrap Admin Dashboard brings the future of admin UI to power your present and future development. Hope UI is available in 8 different technologies which are Bootstrap, Vue JS, React JS, Laravel, CodeIgniter, Figma, XD and Sketch UI Kit and more versions like Tailwind, Angular, React Native, etc are in the roadmap.

Starting Price: $99 per year

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Kaizen Framework

Virtual Splat Software

Kaizen Framework is a low code, rapid application development tool. You can make web application in minutes. It will help you to cut development cost and dependency on developers. No need to write code, no compilation need, no downtime to users. And finally, as the name says "Kaizen", we are constantly updating the framework to make sure that YOU make more money in software development projects. Among many other low-code frameworks, Kaizen is a mature framework that has proven its strength by delivering a variety of applications for different industries. It's constantly evolving for the last 15+ years, with projects already being delivered in 70+ industries with around 500+ projects successfully executed, and very practical solutions. Also, it's easy to learn and deploy and you can host the application wherever you want. The kaizen framework has advanced features compared to other frameworks.

Starting Price: $10 USD per user per day

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KnowledgeKube

KnowledgeKube is the low-code platform for creating truly scalable enterprise applications for greater success. Painlessly migrate from legacy systems at a pace to suit you, with a true enterprise-grade, low-code solution. Digitize user journeys and empower people to better self-serve, whilst easily publishing natively across all devices. Our powerful workflow engine enables you to simplify, digitize and automate complex processes with ease. Future-proof by building for the cloud, start small to scale with confidence on a truly headless elastic cloud architecture. KnowledgeKube helps organizations around the globe to create scalable applications faster. Business users, seasoned developers, and designers alike are empowered across your organization to work more collaboratively and effectively to rapidly build applications of any size. KnowledgeKube is the low-code platform that enables you to produce enterprise web and mobile apps faster and more cost-effectively.

Starting Price: $271.73 per month

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Avalonia UI

Avalonia UI enables developers to create multi-platform apps with .NET. Write once, and run everywhere. Save time and focus on your product. Considered a spiritual successor to WPF, Avalonia UI provides a familiar developer experience, allowing you to leverage years of pre-existing knowledge and investments. rusted by JetBrains as the best framework for modernizing their WPF-based tools, used by >170,000 companies, including 431 on the Fortune 500 list. Our developer community has grown enormously as Avalonia UI has grown in popularity. Join us and be welcomed into our supportive and vibrant community.

Starting Price: Free

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Best Web App Development Platforms in the UK

Compare the Top Web App Development Platforms in the UK as of January 2026

What are Web App Development Platforms in the UK?

Retool

GW Apps

Alpha Anywhere

Intellimas

DHTMLX

Firebase

RadSystems

CaptainCasa Enterprise Client

Appery.io

Ionic

PerfectApps

Oracle APEX

Kissflow

Claris FileMaker

Neptune DXP

Microsoft Power Apps

EASA

AWS Amplify

Thunkable

TSQL.APP

OutSystems

AppGini

Adalo

Joget DX

UI Bakery

GeneXus

Hope UI

Kaizen Framework

KnowledgeKube

Avalonia UI

Best Web App Development Platforms in the UK

Compare the Top Web App Development Platforms in the UK as of January 2026

What are Web App Development Platforms in the UK?

Retool

GW Apps

Alpha Anywhere

Intellimas

DHTMLX

Firebase

RadSystems

CaptainCasa Enterprise Client

Appery.io

Ionic

PerfectApps

Oracle APEX

Kissflow

Claris FileMaker

Neptune DXP

Microsoft Power Apps

EASA

AWS Amplify

Thunkable

TSQL.APP

OutSystems

AppGini

Adalo

Joget DX

UI Bakery

GeneXus

Hope UI

Kaizen Framework

KnowledgeKube

Avalonia UI

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