TestnHire vs. Plum.io - AI & Psychology in Testing

In a world where hiring heavily relies on CVs, resumes, and past experiences that can be inflated, inconsistent, or difficult to compare, organizations are increasingly resorting to assessment platforms that offer more objective evaluations based on skills and behaviors. TestnHire and Plum.io are two such platforms. While they differ in their candidate evaluation methods, both incorporate technology (including AI and structured testing) to aid hiring teams in making more informed, equitable, and data-based decisions.​

The comparison facilitates the understanding of the hiring managers and the HR professionals about which type of assessments these platforms are particularly good at, which situation is most apt for each, and the compromises that may be involved in the decision process concerning one platform over the other.

What TestnHire Offers

​TestnHire is “The Talent Assessment Tool for Smart Hiring Decisions”.  The main aspects of its proposal are

• More than 400 assessments in the form of tests are available in the library that were created by over 50 subject-matter experts for the specific purpose of testing.
• Support for different areas, which includes programming (20+ languages) and possibly other skills, where testing is already done to some extent.
• A feature where the employers can make their own assessments with the help of AI-specified questions and skill tags - thus, it can be tailored to a company’s exact requirements.
• An employer’s process in which they can call the candidates, have the candidates take (online) assessments, and then immediately, through AI-generated scoring, benchmarking, and a detailed performance summary, analyze the results - all this before any interview is scheduled.

In essence, TestnHire focuses on skill-oriented examination, particularly for technical or hard skills, and employs AI for automatic scoring and comparison, which diminishes human effort in scoring tasks.

Plum.io's Advantages

​In contrast to TestnHire, it is more focused on psychometrics and behavioral evaluation, applying I/O psychology to recruitment.

Key Features:

• Plum's evaluations are the basis for determining soft skills that last a lifetime, such as personality, problem-solving, social intelligence, adaptability, learning agility, motivation, leadership potential, etc.
• The main assessment technique is the Plum Discovery Survey, which is also referred to as "Plum Assessment." The time taken for this assessment is said to be around 25 minutes.
• By using the famous "Big Five" personality model along with assessing fluid intelligence and social intelligence, the survey is able to predict a candidate's long-term performance, cultural fit, and even leadership potential.
• With the help of Plum Role Model, employers are able to translate a job description into a behavioral blueprint, which includes the soft skills and behavioral traits that are most likely to lead to success in that role. After that, the responses of the candidates are compared with this blueprint, and data-driven "job fit" scores are generated.
• Plum asserts that its assessments are four times more predictive than just referring to resumes.
• Due to the fact that the exam is conducted online and is scalable, Plum considers itself particularly suitable for high-volume early-career or campus hiring, where many applicants are funneled, and soft-skill/potential-based screening helps to identify the best fits.

​In a nutshell, Plum.io gives priority to people’s behavior, mindset, potential, and fit over their past experiences or hard skills.

Comparing Approaches: Skills vs. Behavior/Potential

​The major difference in philosophy between TestnHire and Plum.io is the aspect that they are measuring and the corresponding outputs that are most suitable for their applications.

TestnHire - Skill-First, Performance-oriented

1. ​Objective, quantifiable skill tests: TestnHire, by offering a library of over 400 skills tests (and custom ones), allows employers to test precisely what they need: coding, domain knowledge, or specialized tasks. In positions where technical competence or job-specific skills are prerequisites, this makes TestnHire a highly logical choice.
2. AI-driven evaluation and comparison: The platform scores and ranks applicants automatically. This results in quicker hiring, human impartiality in test scoring, and smooth ranking/shortlisting.
3. ​Perfect for positions where skills are the most important factor: Such as engineering, programming, and data analysis - the performance is heavily based on actual ability rather than personality or potential.

However, TestnHire’s focus implies it may provide a narrow view of soft skills, cultural fit, behavior under pressure, leadership potential, or motivation unless those aspects are specifically assessed (and that might need custom test design).

Plum.io - Behavior-/Potential-First, Psychology-informed

1. Science-based psychometric assessment: Plum relies on the I/O psychology principles and aims to assess the deep and often-hidden characteristics that are the most important for successful job placement, and they are adaptability, social skills, leadership potential, learning agility, resilience, and motivation. With this method, it is sometimes impossible to gain such insight through resumes or technical tests.
2. Job-fit and role matching through behavioral blueprinting: Plum Role Model associates necessary characteristics with positions; thus, managers can methodically connect psychological compatibility instead of qualifications. This lowers bias, improves consistency, and guarantees that a person's traits are in harmony with the demands of the job.
3. Soft skills screening that can be scaled up - perfect for early-career/high-volume hiring: For those jobs that attract a lot of applicants and where the potential of an applicant is more important than their experience (such as entry-level and campus hires), Plum can help in screening the candidates who have a high chance of succeeding in the long run.

Plum does not necessarily evaluate hard skills or domain-specific competencies. Hence, for a position that requires programming, advanced domain knowledge, or technical skills, Plum’s soft skill assessment might not be enough alone. Moreover, behavioral evaluations can only go so far; they provide a tendency, not an actual performance guarantee under real-world limitations.

Use-Cases and When to Choose Which

​TestnHire

It is ideal when you need skill-based accuracy and technical validation.

It works best for engineering, software development, data science, QA, or any specialized technical or non-technical role where you want objective verification of coding ability, domain knowledge, or logical reasoning. It’s also valuable for large applicant pools where a quick skills-based shortlist is needed. With its predesigned interview questions, TestnHire supports specific testing needs that generic behavioral tools can’t match.​

Plum.io

It is more suitable for positions where emotional intelligence and future potential are important. Plum's psychometric method is of great help in the case of jobs requiring adaptability, leadership, teamwork, creativity, or client interaction. It is applicable for hiring of fresh graduates, campus recruitment drives, and large-scale recruitment where personality and culture are better indicators of success than the candidates' limited experience. Plum is also beneficial in the incorporation of strategies for long-term talent development and retention.

Conclusion

In comparing TestnHire and Plum.io, technology is the main element in both companies. However, they have different approaches to what gets measured, how it gets measured, and what insights get delivered.

TestnHire is the best choice in hiring situations where the emphasis is placed on the hard skills, domain knowledge, and technical competence - rapid and objective measurement of the current capability of a candidate is what TestnHire offers.

Plum.io is the best option in cases where soft skills, behavioral traits, adaptability, potential, and cultural fit are the major considerations - it takes into account what a candidate could possibly become and how likely he or she is to be a long-term employee.

In a lot of hiring scenarios, particularly in the current dynamic and fast-changing job market, the most intelligent solution may not be to exclude either option but rather to use both so that they can support one another. This hybrid method brings about a more all-encompassing, balanced, and just way of selecting the right candidates: answering both “Are they capable of doing the job today?” and “Will they develop, fit in, and be successful in the long run?”

Also Read: TestGorilla Alternatives – Finding the Right Assessment Platform