What is Interview Zen? The Ultimate Guide to a Free Technical Assessment Platform

technical assessment platform


Are you looking for a better way to hire skilled developers? Interview Zen is here to help. With over 500,000 interviews conducted on the platform since its inception, our platform enhances the interview process and allows hiring managers to assess more candidates more accurately than traditional methods.

For a more detailed review of the importance of technical assessments in hiring software developers, you can read our article Why Conduct Technical Assessments When Hiring Software Developers.

In the highly competitive field of software development, hiring the right talent is a challenge millions of companies face yearly. As the demand for software developers grows, Interview Zen has emerged as an invaluable resource in the technical hiring process. 

With over 500,000 interviews conducted on the platform since its inception, leading to thousands of successful job placements, Interview Zen is far more than just an interviewing tool. It’s your trusted partner in finding the ideal candidate for your team, offering precise coding tests and assessments to streamline your hiring journey.

According to a recent report by Evans Data Corporation, there are 26.9 million software developers worldwide, which is expected to rise to 28.7 million by 2024.

The 20th edition of the State of the Developer Nation Report states that there are 24.3 million software developers around the world – that´s 20% more than in 2020. The report predicts that by 2030, there will be 45 million active software developers.

Given these market trends, the market for software developers is vast and continually expanding. Thus, tools like Interview Zen are useful and essential in efficiently navigating this expansive talent pool to find the perfect fit for your organization. This means more jobs, more candidates, and a greater need for Interview Zen.

In this article, we walk you through the history of Interview Zen, its cost, its unique features, and the numerous benefits it offers for hiring managers and companies.

History and Background

Let’s start from the beginning. Interview Zen’s founder, James Summerfield, initially created the platform as a tool to help him hire developers in his corporate role. Frustrated by the time-consuming nature of traditional whiteboard interviews and technical assessments, he developed a solution enabling him to screen candidates more efficiently. Realizing the broad applicability of his creation, James quickly made the platform public and kept it both free and even ad-free.

After launching the original version of the app in 2010, Interview Zen gained rapid recognition. It caught the attention of prominent bloggers on Hubspot and Hacker News, quickly growing its user base. By the mid-2010s, Interview Zen had already facilitated over 100,000 interviews, solidifying its reputation as a go-to platform for technical assessments.

Unlike other technical assessment platforms, Interview Zen focused on user-friendliness and genuine effectiveness, setting it apart from its competitors.

Fast forward to today, Interview Zen has conducted more than 500,000 interviews with thousands of companies. With over one million hours logged and 1.5 million questions solved, the platform hasn’t just stood the test of time; it’s continued to grow and earn trust in the industry.

What fuels Interview Zen’s growth and sets it apart? It’s simple: the platform is cost-effective, free, and flexible. You can create an interview with just three clicks, send it to candidates, and easily review their responses. While other platforms have complicated the process with unnecessary features and cumbersome sign-ups, Interview Zen has stuck to what works. This straightforward approach has not only helped it grow but has also made it a favorite among customers.


Interview Zen wins against all competitors in cost-effectiveness because it’s free – for now. Unlike other platforms that charge hundreds of dollars for similar services, Interview Zen is currently free to use. The focus is on maximizing its reach and usage, so for now, you can take advantage of all its robust features without worrying about the cost. Although there are plans to introduce pricing eventually, the platform remains committed to providing free access for the time being.

The free price model makes it easier for all companies, big or small, to try out a top-of-the-line developer assessment platform without budget concerns. The platform is not only faster than competitors but also free of charge. Many of our users are loyal and repeat customers. Hundreds of new hiring managers are discovering and trying out Interview Zen for their recruitment needs each month.

For more on how Interview Zen compares to other platforms, look at our Top Software Developer Assessment Platforms list.

Features of Interview Zen

When it comes to selecting a technical assessment platform, Interview Zen sets itself apart by prioritizing simplicity. Our platform offers straightforward yet effective functionalities specifically designed to make the hiring process smoother and more efficient.

Below are some of its standout features:

1. Custom Programming Questions

Interview Zen supports various programming languages, allowing you to tailor your technical assessments accurately. Whether you’re hiring for Python, C/C++, C#, Java, JavaScript, PHP, R, or other languages, you can create unlimited custom questions in various languages. This ensures that your assessments are uniquely suited to meet your hiring requirements. 

To experience these features firsthand, you can try the demo available on the Interview Zen website.

2. Speedy Review

Interview Zen allows hiring managers to review recorded interviews at varying speeds, like 1x, 2x, or even 5x. This functionality provides valuable insights into how the candidate processed the question, how quickly they worked, and how much they modified their code throughout the assessment. This feature lets you better understand the candidate’s technical skills and problem-solving abilities.

technical assessment platform

3. Unique URL

Each interview you generate has a unique URL displayed on your dashboard. You can invite candidates by sending them the interview link or adding it to a job posting. This makes the process of taking the interview incredibly straightforward for candidates.

technical assessment platform

4. Easy to Use

Interview Zen focuses on offering essential features that are not only effective but also easy to navigate. With just three clicks, you can create an interview, send out invites, and begin evaluating candidates. This user-friendly approach sets it apart as a preferred choice for online assessments.

If you want to know how to structure your technical interviews effectively, check out our guide on How to Structure Technical Interviews for Software Developers.

Benefits of Interview Zen

When it comes to technical hiring, Interview Zen offers a host of advantages that directly contribute to the efficiency and effectiveness of your recruitment efforts.

Here’s a detailed look at these benefits:

1. Cost Efficiency

While competitors like Codility and CoderPad charge substantial fees for their services, Interview Zen remains a free platform. Codility’s pricing begins at $5,000, targeting larger organizations with significant hiring budgets. On the other hand, CoderPad’s plans range from free to $575 per month, depending on the number of interviews you conduct.

Interview Zen has maintained its no-cost model by emphasizing simplicity and ease of use. We aim for as many people as possible to benefit from the platform. By choosing Interview Zen, you’re not just saving money but investing in a platform committed to streamlining the hiring process.

2. Simplicity

Interview Zen lets you start your hiring process without any hassle. Unlike platforms with a steep learning curve, ours is designed for quick adoption. With just a few clicks, you’re ready to invite candidates to an interview, allowing you to concentrate on evaluating talent rather than navigating a complex interface.

3. Enhanced Interview Process

Interview Zen enables you to screen 10x the number of candidates compared to traditional methods. This high-throughput approach gives hiring managers the advantage of a broader talent pool, allowing for more informed decision-making.

4. Remote Capabilities

Interview Zen recognizes that hiring managers and candidates have diverse schedules and can be in different time zones. The platform lets you do interviews whenever is best for you and the candidate. You don’t have to be online at the same time to complete the interview process. This approach not only removes geographical barriers but also accommodates the varying availabilities of both parties, making it a highly versatile tool in modern recruitment.

5. Immediate Candidate Assessment

Interview Zen quickly sends the hiring manager a recording of the candidate’s coding session. This way, you can review the interview at your own pace, making the decision-making process faster and more flexible.

For those hiring Python developers, please read our article on Best Practices for Hiring Python Developers, which offers valuable insights.

How Interview Zen Works

The platform is designed to simplify the assessment process with a simple, three-step process that effectively identifies the best candidates for your needs.

Below is an in-depth explanation of how Interview Zen works, focusing on these three simple steps: Create, Invite, and Review.

Step 1: Create

Kick off your hiring process by crafting the perfect set of questions. Interview Zen allows you to design questions that align closely with the job role. Be as creative and specific as you want, ensuring you can effectively gauge a candidate’s technical skills and suitability for the position.

technical assessment platform

Once you’ve set up your assessment, take a look at these 10 Example Interview Questions for Software Engineers to include in your next interview.

Step 2: Invite

Once your questions are ready, the next step is to invite candidates to take the assessment. You can invite them individually or cast a wider net by posting the interview link on job boards. This ensures you reach a diverse pool of potential hires, be they full-time, part-time, or freelance developers.

technical assessment platform

Step 3: Review

Interview Zen lets you review recorded interviews with your team and gives real-time feedback during coding tests. These features help you make quick and informed hiring decisions. You get to understand how a candidate thinks and talks while coding and your team can easily discuss and decide who’s the best fit. This way, you find the best people for the job without spending much time or money.

technical assessment platform


Interview Zen has emerged as a remarkable platform that simplifies the technical hiring process. From its origins as a tool developed by founder James Summerfield to its present status as an industry-trusted solution, it offers many advantages. With unique features like custom programming questions, speedy review options, and immediate candidate assessments, the platform focuses on efficiency and effectiveness. 

Interview Zen is also cost-effective and currently free to use, making it accessible for companies of all sizes. Its straightforward design ensures you can focus on evaluating talent, thus aiding you in making well-informed hiring decisions.

Ready to make your hiring process more efficient and effective? Click here to get started with Interview Zen and take your technical hiring to the next level.


What does InterviewZen do?

InterviewZen lets hiring managers create technical interviews to send to candidates. Hiring managers create their interview with questions and let them send a generated link to take the interview.

What functionality does InterviewZen provide?

InterviewZen lets hiring managers create custom interview questions and lets hiring managers play back in real time. It can support sending multiple candidates to the same interview for consistency in interviewing.

Is Interview Zen suitable for remote teams?

Yes, Interview Zen is designed to accommodate remote hiring and includes features to simplify the process.

Does Interview Zen offer support for coding languages other than Python and JavaScript?

Yes, Interview Zen supports a broad range of programming languages, including Python, JavaScript, C/C++, C#, Java, PHP, and R. Additional languages can be added upon request to meet your specific hiring needs.

Can I customize the interview questions?

Absolutely, you can create custom questions that are specific to the job role you are hiring for.

Explore Interview Zen

Ready to simplify your hiring process? Don’t wait. Give Interview Zen a try today. Check out their home page to get started.

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