Top 10 Famous Websites Built with React JS in 2021

Krunal Shah

Jun 09, 2021 | 10 min read

Websites built with ReactJS

Websites promote you 24/7, no employee will do that’- Paul Cookson

The above-mentioned quote describes the importance of a good website. Especially in today's business world where it is essential to be in the periphery of customers, a good website is necessary. Now to build a good website, you need state-of-the-art technology that is flexible and makes the website scalable for end-users.

Over the past few years, websites built with React JS have made a mark of their own. Moreover, we have seen many market leaders opting for React JS in order to increase their user base. Some of the prime examples are Facebook, Airbnb, Instagram, Salesforce, BBC, Reddit and many more.

The above-mentioned list of leading companies using React JS is a clear indicator of an important thing. It shows that the efficacy of React JS development is not limited to a certain genre or business.

React JS has a plethora of features that has made the framework immensely popular for website development. It has a view layer in MVC and a JavaScript library for creating superlative user interfaces. The positive impact of ReactJS is reinstated in Q1 of Facebook of 2021. The monthly active users of the social media giant have soared a whopping 2.85 billion in Q1 of 2021.

Table of content

In this blog, we will study about the 10 most promising and famous websites with ReactJS. Moreover, we will also understand what makes ReactJS a ‘rollicking website development framework’

What makes ReactJS a leading website development framework technology?

React JS development framework technology

Source: Stack Overflow

If we say that ReactJS is ubiquitous, it will not be an overstatement. The modern-day audiences have varied interests when it comes to websites. The leading category in this is news and media followed by tech websites and art and entertainment and many more. Due to its flexible nature, ReactJS is capable enough to develop any kind of website. Besides this, we have listed some of the top reasons why ReactJs is so popular.

Reusable UI and high development speed

ReactJS uses JavaScript framework. Moreover, be it ReactJS for the mobile website or desktop website, its entire codebase contains separate modules. These modules have specific purposes which thereby increases the web development speed.

Also, the developers don’t need to rewrite the codes if they are introducing any new version of the website. The debugging process in websites with ReactJS is fairly simple and straightforward as well.

Better performance

Unlike the Document Object Model (DOM) hierarchy, ReactJS uses Virtual DOM. This plays an important part in making the website light and also improving its DOM version. With the help of the virtual DOM. The browser updates nodes where changes are required.

Thus, it plays a vital role in increasing the performance of the app, user satisfaction and making the app faster.

Developing SEO friendly websites

It’s an unwritten rule that no matter how good a website is, if it doesn’t have visitors, it is of no use. Websites with ReactJS are accessible and SEO friendly as they have server-side rendering features. Thus, these websites have a better chance of getting higher SEO rankings in comparison to websites with client-side rendering.

Thus, ReactJS provides more opportunities for better website’s SEO.

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Now, it is time to look at the top websites who have made their mark in 2021.

Top 10 websites built with ReactJS in 2021

ReactJS has some impeccable features that has made it a ‘darling’ of newer and even established websites. We will understand a few of the top runners in detail.

Outlook Websites Built with React JS


The companies who manage to utilize all the services of ReactJS to its core reach at the helm of their genre. The success story of is no different. Outlook was first introduced by Microsoft in 2017 as a tool that manages personal information. The product is readily available in both mobile and desktop versions and has emails, contacts, task components. Etc.

Microsoft talks very highly about the more responsive nature of ReactJS with the JavaScript framework. The responsive nature has helped the website to appear fresher for the audience. In addition, the upgraded search features and the modern conversation style has made a positive lasting impression on the end-users.

With the help of ReactJS framework, the website has implemented a new design which helps the users to see things speedily. Be it photos, attached files, or even a basic email, the accessibility of the ReactJS website has increased tremendously.


Codecademy Websites Built with React JS

Source: Codecademy

As the name itself suggests, Codecademy is a platform to provide coding classes. The ReactJS website serves the needs of over 25 million users with its impeccable user interface. The website has seamless transition between the pages and shows engaging graphics to make the students understand the content clearly.

The JavaScript framework assists the website to be high on performance and become highly user-oriented. But there is more that Codeacademy does for its users with the help of ReactJS.

The website has high-ended animations which helps the users to understand the content and implement it properly. The neatly designed animations play an important role in enhancing the ‘positive word of mouth’ publicity of the website. Moreover, the rich ReactJS library will assist the designers to do their best job with respect to the website.

When you use ReactJS, you can implement engaging animations with minimal coding. Thus, ReactJS also reduces the web development time without compromising on the quality. These features have made Codecademy a front running ReactJS website in 2021.

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Asana Websites Built with React JS

Source: Asana

This website application works with an aim to increase the communication between teams. Thus, with the help of JavaScript framework, the collaboration, communication within the team improves which leads to better end-product.

Coordination is an important thing when it comes to teamwork. Asana with its highly intrigued UI and seamless features helps the teams get their work organised. On the platform you can easily add and assign tasks to the teams and track their work thoroughly. Thus, it becomes easier for the team members to understand the task as they have a clear outline in front of them. This outline helps them to hit their deadlines consistently without any confusion or time overlap.

Moreover, all the team members can find their work in a shared workspace which increases transparency. Due to such innovative features, Asana has been a leading ReactJS website in 2021 and has delivered astounding results.


Cloudflare Websites Built with React JS

Source: Cloudflare

Along with top quality performance, it is inevitable in the modern world to have a secured and reliable website. Cloudflare is a platform that renders top-notch security and guaranteed reliability to the website application.

With the flexible nature of ReactJS, Cloudflare has been capable of rendering its services to a wide range of companies. Be it gaming, ecommerce, entertainment, financial services and more, when it comes to security, Cloudflare is second to none.

Sites built with ReactJS are moulded according to the usage and requirement. This is the prime reason why Cloudflare is on the rise in terms of performance and usability in 2021. It renders immaculate solutions related to mobile app and website protections and assists in the team-building process.

Cloudflare also understands the ever-changing needs and demands of the customers. Thus, the ReactJS website is now readily available for production needs. Thus, it has become even easier for the users to deploy and collaborate faster sites.

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Trello Websites Built with React JS

Source: Trello

‘Change is the only constant’ and this aspect is applicable to everything in life as well as in website development. For almost a decade, the web-task management system ran on Coffeescript and the Backbone JS framework. But with the dynamic nature and the changing demands, it became time to opt for more vibrant stacks.

With the help of ReactJS, Trello has been one of the best websites when it comes to fantastic responsiveness. Moreover, it has well-designed components to cater all the changing needs of the customers. Also unlike the architecture that was built on Backbone JS, ReactJS enhances the capabilities of Trello. It also gives a clear caching procedure that is easier to follow.

Along with React, the website has Typescript and GraphQL has its primary tools. These tools helps the ReactJS website to overcome all the rising issues and deliver the best service. Thus, Trello is one of the most loved sites with ReactJS in 2021.


Grammarly Websites Built with React JS

Source: Grammarly

Grammarly has undoubtedly emerged as one of the leading digital writing assisting tool. The ReactJS website uses high end technologies such as Artificial Intelligence and Natural Language Processing. Through these technologies, the website is able to render the best services and has undoubtedly become a ‘crowd favourite’.

Along with AI and NLP, the website uses deep learning algorithms and machine learning as well. These tools assist the site with ReactJS to not only correct the sentence but also provide a better alternative. For example, if there is a grammatical error in the sentence, Grammarly will highlight it and provide a better form.  Thus, the user will not only be understanding its mistake but will also get the power to convey things properly.

With the help of JavaScript framework, the website offers different things like plagiarism detection, spelling check, grammar check, etc. Thus, the ‘X-factor’ in Grammarly has made one of the ‘superstars’ of 2021.

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Clearbit Websites Built with React JS

Source: Clearbit

Knowing and understanding the needs of the customers is very essential in the modern business world. Being a marketing data engine for customer interactions, Clearbit does a tremendous job.

It helps the businesses to understand the needs of their customers so that they can make better marketing strategies. The marketing strategies thus made would be sustainable and long lasting.  Clearbit also assists the companies to identify their future prospects and help them to expand their user base.

In addition to expansion of the user base, the site with ReactJS plays a pivotal role in rendering personalized services. Since the businesses are able to understand the demands, they do not beat around the bush in terms of services. Thus as the services get highly personalized, it has a positive impact on the customer retention ratio as well.

The companies can even personalize their sales and marketing interaction. Thus, as they will hit the pain-points of the customers on a regular basis, they will increase their revenue.


Whereby Websites Built with React JS

Source: Whereby

As we still live in a pandemic-ridden world, remote working has become the ‘need of the hour’. Whereby renders superlative services when it comes to video conferencing and making video meetings easy.  Whether you are looking for hassle-free video meetings or enhancing your customer experience, Whereby can serve as a one-stop destination.

This ReactJS website focuses on using simple APIs to embed all the meetings in either the mobile app for website. The ease of usage has made Whereby as one of the leading platforms to conduct online professional meetings, etc. Moreover, the site with ReactJS has no complex maintenance and allows the users to create one-time meeting rooms.

It also renders fast integration. Thus, it helps in developing better websites and mobile applications and bring in the video meeting with a simple frame. Thus, choosing ReactJS for your next project would become a wiser decision.

Revolut Business

Revolut Business Websites Built with React JS

Source: Revolut Business

This ReactJS website allows its user to create a prolific and borderless business account with all the personalized tools. Through the personalized tools, the website gives the businesses the ultimate control over their professional finances. As the companies become more aware about their finances, they are able to invest their money only in the needful things.

Today’s business environment is very dynamic. Thus, if you have a platform that manages everything under one umbrella, it gives you a much-needed edge over your peers. With Revolut business, the companies can keep away from the mundane and focus on what is more important.

Since much time and money is invested in innovative things, the ReactJS website with JavaScript framework aids in business development. It also renders domestic and international business accounts to make payments easier. A global business account will aid in easy exchange and transfer of money without any hidden fees.

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Sanity Business Websites Built with React JS

Source: Sanity

We could unanimously agree to the fact that no matter how technically-advanced we become, content will always remain the king. Sanity is one of the fastest growing and flexible content delivery platforms. It helps in delivering the content to digital devices and products.

The site with ReactJS lets you treat any kind of content as a form of structured data. Thus it becomes easier to flow the data across the APIs and enhance the consumer experiences. In addition, the API will also allow you to access the data as per requirement.


We are a team of expert developers, testers and business consultants who strive to deliver nothing but the best. Planning to build a completely secure and efficient React app? 'Hire ReactJS Developers'.


It is a clear fact that ReactJS development is growing at a rapid pace and it is here to stay. Thus, it is necessary to have a leading, experienced ReactJS development company as your ally during the web development process.

There is no doubt about the efficiency of the website development framework. Moreover, due to its versatility and flexible nature, ReactJS would be a leading technology of the future.

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Krunal Shah

Krunal Shah is the CTO and Co-founder at Third Rock Techkno. With extensive experience gained over a decade, Krunal helps his clients build software solutions that stand out in the industry and are lighter on the pocket.

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