Searching for a reliable ReactJS web development company? DesignRush helps you find top experts trusted by Fortune 500 brands. With 40,000+ vetted agencies and over 100,000 client-agency matches monthly, our platform ensures you get the best fit for your needs. Compare providers by industry expertise, client type, budget, reviews, team size, and portfolio.

Discover the top React.js Development Companies for Your Project

2 Companies-Rankings updated: September 03, 2026

DesignRush evaluates all React.js developers listed based on their technical expertise, past work, and client reviews. Some listings may be paid.

React.JS
React.JS × Publishing × $25,000 - $50,000 ×Clear Filters
  • Level up your web presence

    Level Level is a high-end WordPress agency from Rotterdam. We engineer complex, large-scale platforms for enterprise and public sector clients. No templates, no shortcuts. We deliver bespoke, secure solutions with an unwavering focus on accessibility (WCAG 2.2), performance, and clean code...

    Top Services:

    • WordPress Website Design
    • Web Development
    • Software Development
    • eCommerce Development
    • UI/UX Design
    • Show more
    Location
    Rotterdam, Netherlands
    Number of Employees
    Under 49
    Average Hourly Rate
    $149/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    18 Projects Listed

    Level Level Services

    • WordPress Website Design
    • Web Development
    • Software Development
    • eCommerce Development
    • UI/UX Design
    • IT Compliance Solution
    • Web Design
    • Digital Strategy
    • SEO
    • Digital Services
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • FD Mediagroep
    • ICTU
    • IFFR (International Film Festival Rotterdam)
    • Discriminatie.nl
    • ABN AMRO
    • Business Insider
    • Cordaid International
    • Brussels Airport
    • Fietsersbond
    • Gemeente Almere
    Data sourced from the agency's DesignRush profile

    Level Level Reviews & Testimonials

    • Jarik Oosting
      Jarik Oosting Review from Google
      5.0

      Jarik Oosting's Review Sourced from Google

      Very good WordPress agency. They do what they say and do not sell unnecessary things. Planning is realistic and budgets are also well worked with. Definitely recommended.

    • Nic. Oud Marketing
      Nic. Oud Marketing Review from Google
      5.0

      Nic. Oud Marketing's Review Sourced from Google

      LevelLevel provided us with the right guidance during the construction of our new responsive website. Very satisfied with the delivery and excellent ranking results in a short time.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Your Strategic Digital Partner for Growth and Efficiency.

    For over 20 years, we've built complex digital products. We've learned that most problems don't start in code. They start before teams align on direction, before assumptions surface, before anyone knows what questions to ask...

    Top Services:

    • Web Development
    • WordPress Website Design
    • Web Design
    • Branding
    • eCommerce Development
    • Show more
    Location
    Krakow, Poland
    Number of Employees
    50 - 99
    Average Hourly Rate
    $99/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    16 Projects Listed

    Xfive Services

    • Web Development
    • WordPress Website Design
    • Web Design
    • Branding
    • eCommerce Development
    • Mobile App Development
    • UI/UX Design
    • Logo Design
    • Product Design
    • Software Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Quest Cruises
    • Rare Assembly
    • Van Cafe
    • Olera
    • Yanmar
    • The Nature Conservancy
    • UC Berkeley
    • OECD
    • Universiteit Leiden
    • Houston Faces
    Data sourced from the agency's DesignRush profile

    Xfive Reviews & Testimonials

    • Lukas Szabo
      Lukas Szabo Digital dad at Dads sro
      5.0

      eCommerce Development Review from Lukas Szabo

      The project involved redesigning the website for an internationally acclaimed and award-winning wine producer. Key deliverables included modernizing the website, integrating e-commerce, connecting it with the accounting system, and enhancing the user experience.Our specific requests for the project include:- Modernize clients website- Easy to manage content- Easy to manage online store products- Implementation of ecommerce - Integration of the ecommerce shop with clients accounting systemFollowing the successful completion of the project, our client saw a substantial improvement in business performance. The outcomes achieved include:- A 75% increase in the number of visitors- A 25% increase in overall revenue- A 100% increase in online revenue- The launch of online sales for additional merchandiseThe project was managed by a project manager with the support of two team members. We utilized Basecamp for project management and communicated via email and phone. The project was delivered on schedule, with all requirements meticulously implemented. The vendor diligently adhered to all specifications, and the QA team ensured that everything met the requested standards.We were highly satisfied with the project's management and delivery. We would definitely recommend them and look forward to collaborating again in the future.Their processes are transparent, and their communication is highly professional. They demonstrated flexibility in both pricing and delivery. Additionally, they provide post-launch services, including website maintenance and growth support.Their client care, communication, and development standards are exceptional, and we hope they continue to maintain this high level of quality.

    • Kent Fenwick
      Kent Fenwick VP of Demand Gen at Hubba
      5.0

      Web Development Review from Kent Fenwick

      Certainly! Here's the revised review with the project timeline adjusted to 2017:We had the pleasure of working with Xfive back in 2017 on a project to build a microsite for a new product launch, and we couldn't have been happier with the results. Xfive demonstrated exceptional expertise and professionalism throughout the entire process.From the outset, their team understood our vision and requirements perfectly. They built a fantastic microsite that not only met but exceeded our expectations. The design was sleek, user-friendly, and tailored to our brand's identity. Their technical skills were evident in the smooth functionality and responsiveness of the site.We highly recommend Xfive to anyone looking for top-notch web development services. Their team's dedication, skill, and professionalism are truly commendable. We look forward to working with them again on future projects.

    • PaweÅ‚ StrÄ…czek
      Paweł Strączek Review from Google
      5.0

      Paweł Strączek's Review Sourced from Google

      Flexible working hours, good team, ambitious projects and good coffee, location in the city center, free parking. Possibility to work remotely, from the office or in a mixed model. I recommend!!!

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews

Frequently Asked Questions About React.js Developers

What are the typical React.js development services?

React.js development companies provide end-to-end services that span the entire software development lifecycle, from strategy and design to development and launch. Core services include: 

  • React.js consulting: Guiding businesses on building and optimizing their React applications through component selection, architecture design, and roadmap development. 
  • Custom React.js development: Engineering applications tailored to a business's specific needs, goals, and existing IT infrastructure, and typically include web design and web development.  
  • UI/UX design: Delivering intuitive interfaces, clear user flows, and standardized design systems that align with a brand and its target users. 
  • API integration: Connecting the React frontend to back-end systems, third-party tools, and external data sources to support seamless functionality and user experiences. 
  • Platform migration: Rebuilding or migrating legacy frontends to React to improve maintainability, usability, and performance, often with minimal disruption. 
  • Maintenance and support: Providing post-launch monitoring, debugging, performance optimization, and technical support. 

Many React.js developers also offer specialized expertise, including SaaS products, web application development, customer portals, eCommerce solutions, and minimum viable products (MVPs).  

Some React.js development companies may also offer digital marketing services, such as content marketing, search engine optimization (SEO), and branding. 

What is the difference between React and React Native?

The main difference is that React is used to build web user interfaces, while React Native is for developing mobile applications. Here are more details on their differences: 

 ReactReact Native
Primary platformsWebsites, web applications, and single-page applicationsiOS and Android mobile apps
Tech baseJavaScript/TypeScript with React for web UIJavaScript/TypeScript with React, rendered through native UI components
Best forBusinesses building browser-based products, customer portals, dashboards, eCommerce sites, and SEO-focused web experiencesBusinesses building cross-platform mobile apps for both iOS and Android with shared logic and accelerated development time
ExamplesFacebook, Instagram, Netflix webMicrosoft Teams and Shopify

What are the typical React developer tools?

React.js developers typically choose their stack based on a client's product goals, technical requirements, and existing systems. For example, they may use Formik for complex forms and validation, Storybook for developing and testing components in isolation, and MUI for production-ready UI components and design systems. 

Common React developer tools: 

  • Core front-end: React, JavaScript, TypeScript, HTML, CSS 
  • State and data fetching: Redux, TanStack Query 
  • UI and styling: Tailwind CSS, MUI, Storybook 
  • Testing: Jest, React Testing Library, Cypress 
  • Back-end options: Express, Laravel, Rails, ASP.NET 
  • Databases and infrastructure: PostgreSQL, SQL Server, Redis 

Can React.js developers build AI-powered features into web applications?

Yes. A React.js developer can build AI-powered features into a web application by integrating model APIs, SDKs, and AI workflows into the product experience.   

Depending on your goals, this may include providers such as Google Gemini or Anthropic Claude, along with React developer tools, like Vercel's AI SDK for building chat, search, recommendation, and automation experiences in React-based apps. 

These companies can help you build features such as: 

  • Personalized content and recommendations based on user behavior 
  • Chatbots and virtual assistants for real-time customer support 
  • Smart search with autocomplete, semantic search, and related-result suggestions 
  • AI-assisted dashboards that generate summaries, reports, forecasts, and insights from business data 

When should you hire a React.js development company instead of using an in-house team?

The right choice depends on your project goals, internal capacity, timeline, and need for control. You may want to hire a React.js development company if: 

  • You have a short-term or time-sensitive project, but your internal team is already at capacity. 
  • You do not have the specialized expertise required for the project, such as React architecture, performance optimization, migration, or AI feature integration. 
  • You need to accelerate delivery without hiring and onboarding a full internal team. 
  • You want access to a broader range of skills, such as design, front-end engineering, QA, and post-launch support, through a single external partner. 
  • You need temporary support to fill skill gaps or expand delivery capacity. 

Use an in-house team when: 

  • The application is a core business product that requires long-term ownership and deep institutional knowledge. 
  • The project involves highly sensitive systems, proprietary logic, or strict security and compliance requirements. 
  • You need close day-to-day collaboration, faster internal feedback loops, and direct control over priorities. 
  • The product requires continuous iteration and alignment with multiple internal teams over time. 

ReceiveFreeProposals

For your project

1

Specify your budget, timeline and project requirements

2

Our experts curate a list of up to 5 most qualified candidate agencies

3

We connect you with them so you can choose the most suitable partner