Page 80 | Best Application Development Software in the UK of 2026

Onyx

Onyx is an open source AI platform that integrates seamlessly with your company's documents, applications, and personnel, enhancing productivity across various teams. It enables users to find answers across all team applications, and AI assistants powered by your organization's unique knowledge, accessible directly within your workflow. Developers can build custom workflows using open-source APIs, facilitating the creation of AI applications tailored to specific needs. Onyx connects to over 40 applications, including Asana, Google Drive, Slack, and Zendesk, ensuring real-time synchronization with document-level access. The platform supports deployment in various environments, such as fully air-gapped setups within your Virtual Private Cloud (VPC) or on-premise, ensuring data security by preventing information from leaving your deployment. Document-level permissions are automatically inherited from connected sources.

Starting Price: $16 per month

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TestLabs

TestLabs is an AI-powered platform that automates app testing on real devices, assisting developers in meeting Google Play's 20 Real Device Testing Policy. The platform eliminates manual testing, allowing developers to focus on app development. It tests apps on 20 real devices to ensure compatibility, performance, and compliance with Google Play’s policies. TestLabs streamlines the compliance process, accelerating app readiness for the Play Store and avoiding launch delays. Providing an affordable, high-quality service, reduces the expenses associated with managing in-house testing setups. The platform safeguards app data with advanced encryption and secure protocols, ensuring complete privacy and trust. Leveraging over a decade of app testing expertise, TestLabs offers actionable feedback to enhance app performance and user experience. Users receive daily updates and comprehensive reports, providing clear visibility into the testing process and results.

Starting Price: $19 per month

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Hubble

Hubble is an all-in-one user research platform designed to empower product teams with continuous user insights throughout the product development cycle. It offers a suite of tools, including unmoderated research capabilities such as usability tests, concept tests, prototype tests, design AB tests, live product tests, card sorting, and tree tests. These features enable teams to test product ideas early, scale user research insights, and make informed product decisions. Hubble also provides in-product surveys to collect contextual feedback from users, enhancing engagement and survey response rates. Additionally, it offers participant recruitment services, granting access to a diverse pool of over 4 million B2B and B2C user personas across 150 countries, streamlining the research recruitment process. The platform integrates with tools like Figma for seamless prototype testing and supports various question types for comprehensive data collection.

Starting Price: $95 per month

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Hellooo

Hellooo is an AI-powered user interview software designed to streamline product discovery by generating insights across multiple user interviews within minutes. The platform offers an all-in-one solution for recordings, transcripts, and insights, enhancing the efficiency of user research processes. It provides high-quality transcripts in over 100 languages, delivering results in five minutes or less, which facilitates immediate sharing of highlights post-interview. Hellooo analyzes user sentiments and emotions, offering factual analyses that help understand user feelings throughout the interview. Users can query the AI researcher to uncover patterns, customer journeys, and pain points across qualitative data, enabling swift and informed decision-making. The platform integrates with tools like Google Meet, Zoom, and Teams, allowing users to record interviews directly or upload existing files to start generating insights promptly.

Starting Price: $29 per month

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Progressier

Progressier is a no-code toolkit that transforms existing web applications into fully-featured Progressive Web Apps (PWAs), enhancing user engagement across devices and browsers. It enables universal installation, allowing web apps to be seamlessly installed on iOS, Android, Windows, macOS, and Chrome OS, with step-by-step guidance available in over 20 languages. The platform offers a comprehensive push notification system, facilitating the creation, scheduling, and management of notifications through an intuitive dashboard or API, compatible with various JavaScript frameworks and low-code platforms. Progressier provides a no-code caching strategy builder, allowing users to select predefined strategies and apply them to specific resources, with the platform automatically generating the necessary service worker logic. Additionally, it offers a PWA management suite, enabling centralized control of app components.

Starting Price: $15 per month

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Patchstack

Patchstack is a comprehensive security solution designed to protect WordPress websites from vulnerabilities in plugins, themes, and the core platform. By automatically deploying highly targeted virtual patches, it mitigates high and medium-priority vulnerabilities without altering your site's code or performance. As the world's largest vulnerability discloser, Patchstack has issued over 9,100 virtual patches, safeguarding users up to 48 hours before competitors. Its real-time detection prioritizes vulnerabilities based on exploitation likelihood, reducing alert fatigue. Supported by a vast community of ethical hackers, Patchstack serves as the official security contact for more than 560 plugins, including popular ones like Visual Composer, Elementor, and WP Rocket. It offers next-generation security for enterprise needs, ensuring compliance with standards such as SOC2 and PCI-DSS 4.0. Patchstack's user-friendly interface provides actionable security suggestions.

Starting Price: $89 per month

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21st

21st.dev

21st is a developer platform that provides the fastest way to add AI agents directly into applications. The platform offers an SDK that allows developers to define, deploy, and run AI agents with minimal infrastructure setup. Developers can integrate agents using popular frameworks such as Next.js, React, TypeScript, Python, and Node.js. 21st includes built-in features like chat interfaces, session history, tool execution, memory, and real-time streaming responses. The platform also manages backend components such as sandboxed execution environments, authentication, rate limits, and observability. With support for Claude Code and Codex runtimes, developers can build agents that interact with tools, files, and APIs securely. By handling infrastructure and deployment automatically, 21st enables teams to launch production-ready AI agents quickly.

Starting Price: Free

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Hyperbrowser

Hyperbrowser is a platform for running and scaling headless browsers in secure, isolated containers, built for web automation and AI-driven use cases. It enables users to automate tasks like web scraping, testing, and form filling, and to scrape and structure web data at scale for analysis and insights. Hyperbrowser integrates with AI agents to facilitate browsing, data collection, and interaction with web applications. It offers features such as automatic captcha solving to streamline automation workflows, stealth mode to bypass bot detection, and session management with logging, debugging, and secure resource isolation. The platform supports over 10,000 concurrent browsers with sub-millisecond latency, ensuring scalable and reliable browsing with a 99.9% uptime guarantee. Hyperbrowser is compatible with various tech stacks, including Python and Node.js, and provides both synchronous and asynchronous clients for seamless integration.

Starting Price: $30 per month

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Dromo

Dromo is a self-service data file importer that deploys in minutes, enabling users to onboard data from CSV, XLS, XLSX, and more. It offers an embeddable importer that guides users through validating, cleaning, and transforming data files, ensuring the final output meets quality standards and is in the expected format. Dromo's AI-powered column matching simplifies mapping imported data to your schema, and its powerful validations integrate seamlessly with your application. The platform operates securely with features like private mode, where data is processed entirely within the user's web browser, and allows direct writing of files from the browser to your cloud storage without intermediaries. Dromo is SOC 2 certified and GDPR-ready, emphasizing data privacy and security. It also provides customization options to match your brand's style and supports extensive language options.

Starting Price: $399 per month

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Glue Studio

Revolutionizing product testing, validation, and verification to deliver products to market, faster. Get suitable instrument recommendations based on testing and performance needs, preferences, and even availability. Generate and collaborate in-line on test plans and let Glue automatically revise to accommodate the impacts. Glue Studio is a cloud-hosted, Software-as-a-Service product. It is the first product built on top of the Glue Engine and serves to accelerate test plan development and execution by automating specification and requirement testing, instrument selection, and execution automation. Glue Studio feathers into your current workflow seamlessly by taking design documents (exported from whatever design tool you currently use) and generating test plans based on advanced document knowledge building. Built on top of industry-leading cybersecurity architecture, Glue Studio provides a safe and secure place to store and use proprietary data.

Starting Price: $1,500 per month

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Opengrep

Opengrep is an open-source static code analysis engine designed to identify security vulnerabilities within codebases. As a fork of Semgrep, it maintains a similar focus on providing fast and powerful code pattern search capabilities across more than 30 programming languages, including Python, JavaScript, and Go. Opengrep enables developers to define custom rules for pattern matching, facilitating the detection of potential security issues and promoting adherence to coding standards. By integrating Opengrep into the development workflow, teams can proactively address vulnerabilities, thereby enhancing the overall security and reliability of their software projects.

Starting Price: Free

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TRAE

ByteDance

TRAE is an advanced AI-powered development environment that acts as a 10x engineering assistant for developers. It can autonomously understand project requirements, write code, debug issues, and deliver complete software solutions. TRAE integrates seamlessly into your workflow with intelligent features like real-time collaboration, contextual understanding, and predictive coding assistance. Its SOLO mode enables developers to build, test, and deploy entire applications with minimal input. Using Model Context Protocol (MCP), TRAE dynamically connects to tools, APIs, and external data to optimize performance and accuracy. Designed for speed, precision, and security, TRAE empowers developers to ship production-ready software faster than ever before.

Starting Price: Free

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Stagehand

Stagehand is an AI-driven web browsing framework that enhances Playwright's capabilities, enabling developers to automate browsers using natural language instructions. Built by Browserbase, it introduces three intuitive APIs, act, extract, and observe, on top of Playwright's base page class, facilitating web automation through straightforward commands. For instance, developers can navigate to a webpage, identify elements like search bars, extract specific data such as product prices, and perform actions like adding items to a cart, all through natural language directives. This approach simplifies the creation of durable, self-healing, and repeatable web automation workflows, reducing the complexity and fragility often associated with traditional methods. Stagehand is fully compatible with existing Playwright code, allowing for seamless integration into current projects. By leveraging AI, it offers a more intuitive and efficient way to handle browser automation tasks.

Starting Price: Free

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PhantomJS

PhantomJS is a headless web browser scriptable with JavaScript, running on Windows, macOS, Linux, and FreeBSD. Utilizing QtWebKit as its back-end, it offers fast and native support for various web standards, including DOM handling, CSS selectors, JSON, Canvas, and SVG. This makes it an optimal solution for tasks such as page automation, screen capture, headless website testing, and network monitoring. For example, a simple script can load a webpage and capture it as an image.

Starting Price: Free

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HtmlUnit

HtmlUnit is a "GUI-Less browser for Java programs" that models HTML documents and provides an API to interact with web pages, such as invoking pages, filling out forms, and clicking links, similar to a standard web browser. It offers fairly good JavaScript support, which is constantly improving and is capable of handling complex AJAX libraries, simulating browsers like Chrome, Firefox, or Edge depending on the configuration used. Typically used for testing purposes or retrieving information from websites, HtmlUnit is not a generic unit testing framework but is intended to simulate a browser within another testing framework such as JUnit or TestNG. It is utilized as the underlying "browser" by various open source tools like WebDriver, Arquillian Drone, and Serenity BDD, and is employed by many projects for automated web testing, including Apache Shiro, Apache Struts, and Quarkus.

Starting Price: Free

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Zombie.js

Zombie.js is a lightweight, headless testing framework for Node.js that enables developers to simulate browser environments for testing client-side JavaScript code without the need for a graphical browser. It allows for the automation of web interactions such as form submissions, link clicks, and navigation, facilitating full-stack testing in a simulated environment. Developers can utilize Zombie.js to perform actions like visiting web pages, filling out forms, and asserting conditions within their test suites. The framework integrates seamlessly with testing libraries like Mocha, providing a streamlined approach to writing and executing tests.

Starting Price: Free

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trifleJS

TrifleJS is a headless browser designed for test automation, utilizing the .NET WebBrowser class and the V8 JavaScript engine to emulate Internet Explorer environments. Its API is modeled after PhantomJS, making it familiar to users of that framework. TrifleJS supports various versions of Internet Explorer, allowing emulation of IE7, IE8, and IE9, depending on the installed version. Developers can execute scripts via the command line, specifying the desired IE version for emulation. The platform offers an interactive mode (REPL) for debugging and testing JavaScript code.

Starting Price: Free

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SlimerJS

SlimerJS is a free, open source scriptable browser for web developers, allowing interaction with web pages through external JavaScript scripts. It enables tasks such as opening web pages, clicking links, and modifying content, making it useful for functional tests, page automation, network monitoring, screen capture, and web scraping. Unlike PhantomJS, SlimerJS runs on top of Gecko, the browser engine of Mozilla Firefox, instead of WebKit, and can operate in both headless and non-headless modes. APIs of SlimerJS are similar to the APIs of PhantomJS but there are a few differences in their behavior. However, most of the scripts for PhantomJS run perfectly well with SlimerJS right now.

Starting Price: Free

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Nakama

Heroic Labs

Nakama is an open source game server framework developed by Heroic Labs, designed to facilitate the creation of real-time, multiplayer, and social games across various platforms, including Godot, Unity, Unreal Engine, and more. It provides a comprehensive suite of features such as real-time multiplayer capabilities, customizable matchmaking algorithms, leaderboards, in-game chat, and support for in-game currencies. Developers can extend Nakama's functionality using server-side logic written in Go, TypeScript, or Lua, allowing for authoritative game mechanics and enhanced control over game state. The platform also offers open-source client libraries tailored for different game engines and languages, ensuring seamless integration and flexibility in game development. Nakama is your dedicated server, not another multi-tenant SaaS. Add custom features and secure authoritative gameplay logic directly to your game server.

Starting Price: Free

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jBrowserDriver

Daniel Hollingsworth

jBrowserDriver is a programmable, embeddable web browser driver compatible with the Selenium WebDriver specification. It is headless, WebKit-based, and written in pure Java. The project is open source and licensed under the Apache License v2.0. To run jBrowserDriver from a remote Selenium server, start the remote Selenium server(s) and use the appropriate code to call jBrowserDriver remotely. For building from source, install and configure Maven v3.x and run mvn clean compile install from the project root. To use in Eclipse, either import the existing Java project from the root directory or import the Maven file. For usage, jBrowserDriver can be used like any other Selenium WebDriver or RemoteWebDriver and works with Selenium Server and Selenium Grid.

Starting Price: Free

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WebKit

WebKit is a fast, open source web browser engine used by Safari, Mail, App Store, and many other applications on macOS, iOS, and Linux. It serves as the foundation for rendering web content and executing JavaScript in these applications. Developers can contribute to the project by reporting bugs or submitting code. Web developers can follow WebKit's development, check feature status, and download Safari Technology Preview to experiment with the latest web technologies. The project emphasizes real-world web compatibility, standards compliance, stability, performance, battery life, security, privacy, portability, usability, and ease of code modification. WebKit is open source and available under the BSD 2-Clause license, with the exception of the WebCore and JavaScriptCore components, which are available under the GNU Lesser General Public License.

Starting Price: Free

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ScrapFly

Scrapfly offers a suite of APIs designed to streamline web data collection for developers. Their web scraping API enables efficient extraction of web pages, handling challenges like anti-scraping measures and JavaScript rendering. The Extraction API utilizes AI and large language models to parse documents and extract structured data, while the screenshot API allows for capturing high-quality visuals of web pages. These tools are built to scale, ensuring reliability and performance as data needs grow. Scrapfly also provides comprehensive documentation, SDKs in Python and TypeScript, and integrations with platforms like Zapier and Make to facilitate seamless integration into various workflows.

Starting Price: $30 per month

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TestQuality

TestQuality is a modern test management platform designed for QA and development teams to build, run, and manage test cases, plans, runs, and cycles efficiently. It supports modern testing workflows like shift-left, BDD, TDD/ATDD, and continuous testing, offering seamless integration with tools such as Jira, GitHub, Selenium, Playwright, and Jenkins. The platform provides powerful test analytics to help teams understand the quality of their tests and the performance of their QA processes. TestQuality's live two-way integration ensures that your testing efforts are synchronized with your development and QA workflows in real time. It also allows for the import of test results from popular CI/CD, test automation, and unit testing systems, or through its robust REST API, facilitating integration with any DevOps workflow. With customizable roles, permissions, and scalable pricing plans, TestQuality can be tailored to meet the specific needs of both small teams and large enterprises.

Starting Price: $90 per month

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AppWarp

ShepHertz Technologies

AppWarp is a powerful real-time multiplayer game development framework that enables seamless integration of interactive online gameplay across multiple platforms. Supporting over 18 SDKs, including iOS, Android, Unity3D, and Cocos2Dx, it allows developers to create engaging real-time and turn-based multiplayer experiences effortlessly. AppWarp offers essential features like matchmaking, connection stability, and cross-platform functionality, ensuring smooth gameplay interactions. Developers can leverage its intuitive client-side tools to manage virtual rooms, lobbies, and communication using a custom binary protocol. For those needing more control, AppWarp S2 provides an on-premise server solution, allowing developers to host their own authoritative game servers with advanced customization options such as server-side authentication and game logic.

Starting Price: $100 per month

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PlayerIO

PlayerIO provides a robust suite of tools and services tailored for developers of online games, allowing them to focus on creating engaging experiences without worrying about backend complexities. The platform includes powerful features like a cloud-based database for scalable data storage, a file storage system for asset management, and comprehensive hosting solutions. It also supports multiplayer game functionalities and offers extensive analytics, virtual economy systems, and easy integration with multiple payment gateways, positioning itself as a one-stop solution for game development needs.

Starting Price: $24.95 per month

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Phaser

Phaser is a fast, free, and fun open source HTML5 game framework that offers WebGL and Canvas rendering across desktop and mobile web browsers. It has been actively developed for over 10 years. Phaser is built on and around web standards and puts the browser first. Web export isn't an afterthought or checkbox on a feature list; it's our home. Phaser is fully open source, and you have unrestricted access to every last line of code in the core library. Phaser has more ready-made templates than any other game framework and is a great CLI tool. Games made with Phaser have been used as the cornerstone for marketing campaigns for years. They've been deployed everywhere, including as prominent features on sites for major Hollywood film blockbusters, massive brand promotional campaigns, educational content, interactive experiences, TV shows, news reports, charity fund-raising broadcasts, live events marketing, and so many more.

Starting Price: $9 per month

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RPG Maker

RPG Maker is a series of game development engines that enable users to create their own role-playing games without prior programming experience. Each version of RPG Maker offers unique features and improvements to cater to different development needs. The latest installment, RPG Maker MZ, includes enhancements to the map editor, character generator, database, animations, and plug-ins, allowing for more customization than ever before. RPG Maker MV expands platform support to include MacOSX, Android, and iOS, with improvements to the map editor, higher resolution, and easy-to-use plug-ins. RPG Maker VX Ace is known for its intuitive interface and extensive library of assets and scripts, making it a great starter engine for beginners while still powerful enough for developers. The RPG Maker series provides a comprehensive set of tools, including a versatile map editor for designing environments, a character generator for creating original characters, and more.

Starting Price: Free

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Defold

Defold is a free and open source game engine designed for high-performance cross-platform game development. It comes fully featured out of the box, requiring no setup or configuration, allowing developers to simply download the editor and start creating. The engine includes a visual editor, code editor, Lua scripting, Lua debugger, scene editor, particle editor, and tilemap editor, and supports both 2D and 3D game development. With a single codebase and no need for external tools, Defold enables publishing to major platforms such as PlayStation5, PlayStation4, Nintendo Switch, Android, iOS, macOS, Linux, Windows, Steam, HTML5, and Facebook. It offers a component-based system for building games, allowing the use of basic building blocks to create complex behavior, and supports writing game logic using Lua. Developers can add new functionality from the asset portal, set up their own local build environment, and write native code to extend the engine.

Starting Price: Free

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MonoGame

MonoGame is a free and open-source framework that allows developers to create cross-platform games using C# and other .NET languages. It supports multiple platforms, including Windows, macOS, Linux, Android, iOS, PlayStation 4, PlayStation 5, Xbox One, and Nintendo Switch. MonoGame provides a comprehensive set of features, such as 2D and 3D rendering, sound playback, input handling, and content management, enabling the development of high-quality games across various genres. The framework is a re-implementation of Microsoft's XNA 4 API, ensuring familiarity for developers with XNA experience. Notable games developed with MonoGame include "Streets of Rage 4," "Carrion," "Celeste," and "Stardew Valley." MonoGame is actively maintained by the MonoGame Foundation and its community, with ongoing updates and support.

Starting Price: Free

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Gideros

Gideros is a free and open-source cross-platform game development framework that enables developers to create high-performance 2D games using the Lua programming language. It offers instant testing on real devices through Wi-Fi, eliminating the need for lengthy export or deployment processes. Built on C/C++ and OpenGL, Gideros ensures that games run at native speed, fully utilizing the power of CPUs and GPUs. The framework supports easy extension through plugins, allowing developers to import existing code in C, C++, Java, or Objective-C and bind it to Lua. Gideros provides its own class system with standard object-oriented programming practices, enabling clean and reusable code. The comprehensive development environment includes a lightweight IDE, players for desktops and devices, a texture packer, and a font creator. Gideros supports multiple platforms, including Windows, macOS, Linux, iOS, Android, and HTML5.

Starting Price: Free

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Best Application Development Software in the UK - Page 80

Compare the Top Application Development Software in the UK as of May 2026 - Page 80