Selecting the right person for a job saves time and resources. However, sifting through resumes is inefficient and leads to unreliable results.
Pre-employment testing offers an objective way to streamline your hiring process and improve the quality of hires. Test results provide insight into a candidate’s skills, cognitive ability, and personality traits. Objective criteria take the guesswork out of comparing unreliable resume claims.
Choosing the right platform to suit your business ensures it reaps the benefits pre-employment testing offers. To help with your decision, this article compares the features of TestGorilla and Aon.
Table of contents
- How does TestGorilla work?
- How does Aon work?
- TestGorilla vs. Aon: Test libraries
- TestGorilla vs. Aon: Functionalities for hiring developers
- TestGorilla vs. Aon: Video interviews
- TestGorilla vs. Aon: Candidate experience and company branding
- TestGorilla vs. Aon: Enterprise and startup friendliness
- TestGorilla vs. Aon: Quality control
- TestGorilla vs. Aon: Anti-cheating measures
- TestGorilla vs. Aon: Reporting and analytics
- TestGorilla vs. Aon: Customer support
- TestGorilla vs. Aon: Pricing
- TestGorilla vs. Aon: Ease of use
- Conclusion: TestGorilla vs. Aon
- Streamline your hiring process with pre-employment testing
- ✅ Get started with TestGorilla today
How does TestGorilla work?
TestGorilla improves the recruitment process by delivering unbiased insights.
TestGorilla’s library has more than 280 scientifically vetted tests, providing comprehensive results in less time. You can measure cognitive ability, personality traits, and technical skills like coding language proficiency.
TestGorilla makes it easy to build job-specific assessments in minutes. Choose tests from TestGorilla’s library, or create your own and send a link directly to your candidates.
Assessments can be customized with job-specific test questions, video interview questions, custom coding challenges, and more.
TestGorilla creates detailed reports with easy-to-read analytics that help you understand your talent pool better. Robust anti-cheating and quality-control measures ensure accurate data. Hiring teams using TestGorilla are equipped to make informed decisions faster.
How does Aon work?
Aon offers a wide range of pre-employment testing. Tests are categorized as follows:
- Ability tests (for cognitive ability)
- Personality questionnaires
- Knowledge tests (for job-specific skills)
Each online assessment consists of several tests or questionnaires, which you can combine to target the skills or attributes necessary for each role.
Premade assessments are available to improve high-volume hiring and select early-career or apprentice candidates.
Aon offers multilingual assessments that are adaptable across cultures. Tests measure job-specific skills as well as personality traits and general cognitive ability.
Aon assessment data is compiled into detailed reports that compare and rank candidates.
TestGorilla vs. Aon: Test libraries
Both TestGorilla and Aon offer extensive test libraries.
A comprehensive test library enables you to build quality assessments faster because you can find relevant questions for a number of common roles.
It can also be useful for creating custom test questions. These can identify a candidate’s ability to manage challenges unique to your business.
TestGorilla’s test library

TestGorilla’s test library offers more than 280 test questions that measure:
- Cognitive ability
- Personality traits
- Situational judgment
- 10+ languages
- Role-specific skills (such as digital marketing knowledge)
- Programming skills
TestGorilla also lets you fully customize assessments. Combine tests from the test library or create your own custom questions. Response formats can also be customized and include:
- Multiple-choice
- Open text
- Video response
- File upload
- Coding challenges
TestGorilla also supports international hiring, with localized websites in 11 languages.
Aon’s test library

Aon offers more than 70 specific ability tests, as well as cognitive ability and personality tests. Tests can be combined to build an assessment that aligns with each job’s requirements.
Tests are available in multiple languages, although it’s unclear whether Aon offers any tests in language comprehension.
Customization is not offered for Aon’s assessments. Tests must be selected from Aon’s test library.
Test libraries: Comparison chart at a glance
TestGorilla | Aon | |
Cognitive ability tests | Yes | Yes |
Situational judgment tests | Yes | Yes |
Job-specific tests | Yes | Yes |
Software tests | Yes | Yes |
Programming tests (including coding challenges) | Yes | Yes |
Language tests | Yes | Unknown |
Personality tests | Yes | Yes |
Culture-add test | Yes | Yes |
Your own custom tests | Yes | No |
Custom questions per assessment | Yes | No |
Test recommendations for each job role | Yes | No |
Multiple tests per assessment | Yes | Yes |
TestGorilla vs. Aon: Functionalities for hiring developers
Hiring developers requires assessing unique, highly technical skills. Pre-employment testing can identify a candidate’s skill level clearly and objectively.
Look for platforms offering a range of coding languages and development framework tests. Features like code playback give additional insight into how each candidate approaches a challenge.
Hiring developers with TestGorilla
TestGorilla provides a library of more than 80 tests specifically measuring programming skills. These include mobile- and web-development frameworks, popular coding languages like Python, and custom coding challenges.
Tests can be customized to reflect your organization’s unique requirements. TestGorilla also enables playback of all coding challenges so you can see firsthand how the candidate approached each challenge.
Hiring developers with Aon
Aon offers a range of programming-specific tests. These cover common coding languages and development frameworks. Test results are automatically graded, and a report ranks candidates by their skill level.
Code playback gives a review of each candidate’s approach. Coding simulations are also available to replicate the custom coding challenges a developer would likely encounter in your organization.
Functionalities for hiring developers: Comparison chart at a glance
TestGorilla | Aon | |
Web-development frameworks | Yes | Yes |
Mobile-development frameworks | Yes | Yes |
Algorithmic-thinking challenges | Yes | Yes |
Debugging challenges | Yes | Yes |
Language-specific concept challenges | Yes | Yes |
Your own custom coding challenges | Yes | Yes |
Code-playback function | Yes | Yes |
Automated scoring | Yes | N/A |
TestGorilla vs. Aon: Video interviews
Incorporating one-way video interviews and custom video questions into assessments help measure a candidate’s communication skills.
One-way video interviews can also replace recruiter screening calls to save time. This feature can evaluate large pools of potential talent efficiently, helping you select the best candidates to invite for a face-to-face interview.
TestGorilla’s video interviews
TestGorilla provides user-friendly one-way interviews that let candidates record responses. Candidates are free to record themselves at the best time for them, and your hiring team can also review responses at their convenience.
TestGorilla enables you to add custom video questions to further tailor assessments. Members of your hiring team can add comments and scores to video responses, making sharing feedback simple.
Video questions give deeper insight into candidate communication skills. They also add variety to the testing process, preventing test abandonment.
Aon’s video interviews
Aon also enables one-way video interviews and video response questions.
Questions can be customized to encourage answers relevant to the open job role.
Reports from video interviews can be reviewed by members of the hiring team, but responses can’t be annotated.
Video interviews: Comparison chart at a glance
TestGorilla | Aon | |
One-way video interview | Yes | Yes |
Custom video questions | Yes | Yes |
Recording of candidates’ attempts | Yes | No |
Recording and playback on any device | Yes | Yes |
Rate and comment video answers | Yes | No |
TestGorilla vs. Aon: Candidate experience and company branding
Candidates are more likely to complete pre-employment testing if they believe the tests are reasonable and easy to use. Features that improve a candidate’s experience include limiting test length, providing a mobile-friendly platform, and ensuring access to support.
Company branding features also help to provide unified candidate communication. These include integrating your company’s logo and brand colors into correspondence as well as customized options like video intro and outro messages.
The candidate experience with TestGorilla
TestGorilla provides a seamless candidate experience. You can add your company logo and colors to assessments, and it’s easy to create custom video and email communications.
Candidates are offered support directly to ensure they’re able to complete assessments to the best of their ability. Tests and assessments can be accessed on mobile devices and don’t require an account to log in.
The candidate experience with Aon
Aon supports sharing company branding on communications as well as intro and outro videos. However, companies can’t customize written correspondence such as invitation or rejection emails.
Candidates can access Aon’s testing platform on mobile devices but must create a separate login with Aon before completing assessments.
Candidate experience and company branding: Comparison chart at a glance
TestGorilla | Aon | |
Your company’s intro or outro video | Yes | Yes |
Assessments branded with your company logo and colors | Yes | Yes |
Customizable invitation and rejection emails | Yes | No |
No login required for candidates | Yes | No |
Mobile friendly | Yes | Yes |
Help and support for your candidates | Yes | Yes |
Typical test length | 10 minutes | 15 minutes |
Qualifying questions prior to assessment | Yes | No |
TestGorilla vs. Aon: Enterprise and startup friendliness
Effective pre-employment testing platforms can cater to businesses of all sizes, from startups to large-scale enterprises.
Keep an eye out for features like API access, bulk candidate management, and ATS integrations to scale pre-employment testing as your business grows.
TestGorilla’s enterprise and startup friendliness
TestGorilla caters to the pre-employment testing needs of both small and large-scale hiring.
A free forever plan makes it possible for even the smallest business to improve its hiring process. TestGorilla’s plans also offer flexibility for companies with intermittent recruitment needs.
Large enterprises also benefit, thanks to features like bulk candidate actions, API access, multiple user controls, and ATS integrations.
TestGorilla is committed to continuously developing new features to support the diverse needs of all customers, irrespective of their size.
Aon’s enterprise and startup friendliness
Aon integrates with more than 80 ATS platforms. It also provides assessments in multiple languages, which can be beneficial to global enterprises. However, Aon lacks the bulk candidate actions and API access that are necessary for many large organizations.
Aon doesn’t offer a free plan or features targeting support for small businesses.
Enterprise and startup friendliness: Comparison chart at a glance
TestGorilla | Aon | |
ATS integration | Yes | Yes |
Multiple users and role-based rights management | Yes | Yes |
GDPR compliant | Yes | Yes |
Multiple candidate invitation options | Yes | N/A |
Public link to invite candidates | Yes | N/A |
Public links for each candidate source | Yes | N/A |
Bulk invite candidates (CSV/XLSX upload) | Yes | N/A |
Track candidate stages from invited to hired | Yes | Yes |
API access | Yes | N/A |
TestGorilla vs. Aon: Quality control
Test results must be reliable and accurate before they can improve hiring decisions. You can determine a platform’s reliability and accuracy by examining its quality-control processes.
Look for measures like science-based question development, extensive quality checks, and adapting to feedback.
TestGorilla’s quality-control processes
TestGorilla puts every test through a 28-step quality-control process before it’s published. Subject-matter experts, psychometricians, peer reviewers, and copywriters all contribute to quality reviews.
TestGorilla continuously improves tests by soliciting feedback from customers and test-takers. Test questions are also retired after they have appeared a set number of times to prevent the possibility of web leaks.
Aon’s quality-control processes
Aon claims it provides research-backed psychometric assessments. It offers a wide variety of tests that are intended to measure cognitive ability, personality, and job-specific skills.
Per Aon’s website, each test is subjected to robust assessment. However, Aon doesn’t define how it reviews its tests, nor does it describe its quality-control processes in detail.
Quality control: Comparison chart at a glance
TestGorilla | Aon | |
Proprietary algorithms that continuously improve the quality of each test | Yes | N/A |
Extensive quality checks before tests go live | Yes | N/A |
Questions replaced after reaching exposure limit | Yes | N/A |
Customer feedback used to improve tests | Yes | N/A |
Test-taker feedback used to improve tests | Yes | N/A |
TestGorilla vs. Aon: Anti-cheating measures
Anti-cheating measures ensure a level playing field for all candidates.
These measures prevent candidates from researching answers during the assessment and identify when someone other than the candidate accesses a test.
Common anti-cheating measures include test time limits, disabling copy and paste, and logging the test-taker’s IP address.
TestGorilla’s anti-cheating measures
TestGorilla confirms a candidate’s identity with IP address monitoring and regular webcam snapshots (with permission).
TestGorilla also uses full-screen monitoring to identify when a candidate clicks outside the test window and disables copy and paste to minimize the risk of candidates sharing questions.
Test questions are randomized within each test and drawn from a large pool of questions. This makes it less likely that candidates can prepare in advance. Questions are retired after a certain number of appearances to limit the impact of leaks.
Aon’s anti-cheating measures
Aon offers optional virtual proctoring to give oversight while a candidate completes their assessment.
Tests are subject to a time limit, but candidates can also take ungraded practice tests before their assessment without a time limit.
Aon doesn’t define any further anti-cheating measures but warns candidates that they may be subject to a retest prior to hiring.
Anti-cheating measures: Comparison chart at a glance
TestGorilla | Aon | |
IP address logging (to avoid multiple attempts by the same candidate) | Yes | No |
Logging of candidate location | Yes | No |
Webcam snapshots (with the option to turn on/off) | Yes | No |
Full-screen mode detection (to avoid research during the test) | Yes | No |
Randomized questions per test | Yes | No |
Large question pool for each test | Yes (100+) | N/A |
Questions and answers not visible to employers to protect test integrity | Yes | No |
Time limit on tests | Yes | Yes |
Copy-paste disabled | Yes | No |
TestGorilla vs. Aon: Reporting and analytics
Reliable pre-employment testing software should enable you to compare candidate results easily and generate informative reports.
Benchmarking features can help gauge the quality of candidates in your talent pool. Adding notes to reports helps to recall details about each candidate and makes it easier to share observations with the rest of your hiring team.
TestGorilla’s reporting and analytics features
TestGorilla provides comprehensive reports that summarize results and make it easy to identify top candidates.
Individual candidate reports compare test-takers against each other and against a scoring benchmark. An overview report gives insights into all candidates who took an assessment.
Each report can be easily downloaded in PDF, XLSX, and CSV formats for distribution. Notes and ratings can be added to reports to help share observations and prepare for interviews.
Aon’s reporting and analytics features
Aon doesn’t disclose how it displays reports or any methods for sharing results among hiring team members.
Reports are created and visible within the assessment software. Some skills tests, like coding challenges, can be automatically graded and reported.
Reporting and analytics: Comparison chart at a glance
TestGorilla | Aon | |
PDF reports of assessments and individual candidates | Yes | N/A |
Excel and CSV reports of assessments and individual candidates | Yes | N/A |
Comprehensive overview of all current and past candidates | Yes | N/A |
Scoring benchmarks for candidates (including percentile rank scoring) | Yes | N/A |
Add your ratings and personal notes for candidates | Yes | N/A |
TestGorilla vs. Aon: Customer support
Quality customer support ensures that both hiring teams and candidates can use testing software effectively.
Hiring teams can be sure they’re using all the available features to support efficient recruitment, and candidates can have faith in the testing process, knowing they can access help when it’s needed.
Most pre-employment testing platforms offer customer support through live chat, email, and phone.
TestGorilla’s customer support
TestGorilla provides support directly via live chat and email.
New customers on any paid plan receive an in-depth onboarding tour to get acquainted with the platform.
TestGorilla also offers a comprehensive online help center with detailed guides for both customers and candidates.
Aon’s customer support
Aon doesn’t clarify how customers or candidates can obtain support.
A limited FAQ section is available for candidates. It explains the test process and what to expect during an assessment.
Customer support: Comparison chart at a glance
TestGorilla | Aon | |
Live chat | Yes | N/A |
Help center | Yes | Limited FAQs |
Email support | Yes | N/A |
Training and onboarding tour | Yes | N/A |
Phone assistance | No | N/A |
TestGorilla vs. Aon: Pricing
Most pre-employment testing platforms price their services with a fixed rate per user per month. Some providers offer flexible plans like pay-as-you-go models or free plans.
Pricing can vary based on the available features or the size of your business.
TestGorilla’s pricing
TestGorilla offers flexible pricing to meet a wide range of hiring needs.
A Free forever plan gives access to 10 tests, including personality tests.
TestGorilla offers three paid plans (billed annually):
- Pay as you go at $312 per year. Includes access to more than 280 tests for unlimited account users.
- Scale at $3,900 per year. Includes ATS integrations, PDF reports, customizable tests, and other features, plus access to the full library of tests for unlimited users.
- Business at $26,400 per year. Includes everything in the Scale plan, as well as API access, a custom onboarding demo, and a customer and candidate support SLA.
Custom pricing options are also available.
Aon’s pricing
Aon shares pricing by custom quote only.
Pricing: Comparison chart at a glance
TestGorilla | Aon | ||
Plan | Price (billed annually) | Plan | Price |
Free | $0 | Quotes available by request | |
Pay as you go | $26 per month | ||
Scale | $325 per month | ||
Business | $2,200 per month |
TestGorilla vs. Aon: Ease of use
An easy-to-use platform creates a seamless experience for your hiring team and candidates.
Features that support ease of use include quick navigation, intuitive interface design, and easy-to-follow instructions.
TestGorilla’s user interface and ease of use
TestGorilla makes it quick and easy to set up an assessment and send it to candidates. The intuitive interface is inviting for users and helps streamline the hiring process.
Candidates are tracked on the platform from invite to outcome. Even high-volume recruiting can be organized thanks to bulk invitations and automated result comparison.
Test-takers find a straightforward testing process that provides easy-to-understand and comprehensive instructions.
Aon’s user interface and ease of use
Aon provides an uncomplicated interface to encourage test completion. However, it’s unclear how straightforward it is for hiring team members to create assessments and track candidates through the process.
Reports also appear to be available through the assessment software but can’t be readily shared among hiring team members.
Conclusion: TestGorilla vs. Aon
TestGorilla and Aon both offer a wide range of pre-employment assessments. Tests on either platform can measure cognitive ability, personality traits, and job-specific skills. Specialized tests like coding challenges are also available on both platforms.
Test reliability is vital to ensure your pre-employment testing correctly identifies the best candidates. TestGorilla thoroughly vets tests before they are published and continuously reviews questions to make sure they perform as intended. Aon provides no details on how each test is validated.
Another important factor in test reliability is a candidate’s potential to cheat on a test. TestGorilla provides robust anti-cheating measures that ensure results can be trusted. In contrast, Aon only enables virtual proctoring as an extra option.
TestGorilla’s flexible and transparent pricing also stands out, as well as its reputation for providing an easy-to-use platform.
Streamline your hiring process with pre-employment testing
Pre-employment testing offers insights beyond what resumes reveal and improves hiring outcomes. A skills-based hiring approach saves time and resources while providing fair recruitment.
TestGorilla helps you make better hires without bias. Sign up for our Free plan today, or contact us for a free 30-minute live demo and discover how TestGorilla can enhance your hiring process.