What is the best free online IQ test?

123test offers a genuinely free 10-question estimate with instant results and no registration, and iqtest.net is free with immediate results. CogniFit's IQbe is free but requires creating an account. Free tests are short estimates — good for curiosity, too brief for a reliable profile.

What's the most rigorous online IQ test?

RIOT (riotiq.com) makes the strongest rigor claims we could verify: developed by Dr. Russell T. Warne, an educational psychology scholar and their Chief Scientist, 15 subtests across 6 cognitive abilities, a stated margin of error of ±3.7 IQ points, and one-time pricing ($25–50) with no subscription.

Are online IQ tests accurate?

Every online test — free or paid, including ours — produces an estimate, not a clinical score. Only a psychologist-administered instrument like the WAIS gives a formally valid result. Judge online tests by transparency: published methodology, stated margins of error and honest claims.

Which IQ tests use subscriptions, and what should I check first?

myiq.com, brainmanager.io and IQ Revealed all use paid trials that convert to recurring subscriptions. brainmanager.io does not display what its trial costs. Before entering a card on any of them, find the renewal price and cycle, locate the cancellation path, and read the refund policy. We print ours on the pricing page.

The Best Online IQ Tests in 2026, Compared Honestly

There is no single "best" online IQ test — there's a best free estimate (123test), a most rigorous one-time measurement (RIOT), and full subscription suites (ours included). What matters is knowing which you're buying and what the renewal terms are before a card comes out. We checked every site below on August 25, 2026 and report only what their own pages state.

Disclosure: this comparison is published by IQ Revealed, one of the products listed. We include ourselves, state our terms identically to everyone else's, and link every competitor so you can verify. We are not affiliated with, endorsed by or connected to any other service named on this page — 123test, iqtest.net, CogniFit, RIOT (riotiq.com), brght.org, myiq.com or brainmanager.io; their names are used only to identify the services compared, and every fact about them comes from their own site or terms.

One rule applies to all of them: an online score is an estimate for self-insight — see how accurate IQ tests really are — and no website substitutes for a psychologist-administered test.

IQ Revealed (this site)

Subscription: $1 / 7-day trial, then $29.99 every 28 days. Best for: A full testing-and-training suite with transparent subscription terms.

40-question matrix-reasoning test, ~15 minutes; score with classification band, percentile, ranking against the general population, certificate
Personality, career and relationship tests plus adaptive brain training in the same membership
Scoring methodology published; renewal terms printed on the pricing page; two-click cancellation; published refund policy

123test.com

Free (short test); paid one-time tests $12.99. Best for: A genuinely free quick estimate with zero commitment.

Free test: 10 questions, instant estimate, "Free and No registration"
Paid one-time options: Culture Fair Intelligence Test (25 questions) and Classical Intelligence Test (44 questions), $12.99 each

RIOT (riotiq.com)

One-time purchase: $25 basic / $50 full (both listed as reduced from $50/$150). Best for: The most rigorous single measurement without a subscription.

Developed by Dr. Russell T. Warne, their Chief Scientist, described on their site as an educational psychology scholar
Full test: 15 subtests, 6 cognitive indices, ~52 minutes, stated margin ±3.7 IQ; basic: 5 subtests, ~13 minutes, ±5.6
Free try-out offered; priced as a one-time purchase, with no subscription listed

CogniFit (cognifit.com)

Free IQ test; broader training platform is freemium. Best for: A free, science-flavored test if you don't mind registering.

IQbe: non-verbal test of fluid intelligence, "designed to be completed online in minutes", described as scientifically validated
Requires creating an account — "Create free account. No credit card required."

iqtest.net

Free test; optional electronic certificate offered afterwards. Best for: A no-friction free run-through.

Free with results shown immediately on completion
"If you like your result at the end of the test, you can request an electronic certificate" — they do not publish its price

brght.org

Paid, from $19.95. Best for: Benchmark-heavy reporting and repeat testing.

Adaptive test (IRT-based) that adjusts question difficulty to your answers
Report benchmarks your score against people in your target job, university and city; unlimited retakes

brainmanager.io

A "small fee" starting a 7-day trial that converts to a subscription. Best for: A quick certificated result — if you note the trial terms first.

"Get your IQ score within 10 minutes"; they publish no item count
"The trial turns into a full subscription after 7 days." Neither the entry fee nor the post-trial price is displayed — the fee renders literally as "$undefined" on their home page. Find both before paying

myiq.com

Subscription: $1 / 7-day trial, then $29.99 every 28 days. Best for: A polished funnel with a large review base — read the renewal terms first.

Item count not published; "up to 20 minutes" per their pricing FAQ; returns a score with breakdown and a cognitive profile, with courses and further tests listed as included
4.1 on Trustpilot across 136,000+ reviews; dominant complaint theme is unexpected recurring charges; refunds discretionary per terms

How to choose in 30 seconds

Just curious? Take a free one (123test, iqtest.net, CogniFit).
Want one rigorous number, no strings? RIOT's one-time tests.
Want testing plus training over time? A subscription suite — then judge on transparency: renewal terms visible before checkout, published methodology, easy cancellation. That standard is why we publish ours, and it's the standard you should hold everyone to, including us. See also: IQ Revealed vs myiq.com, is myiq.com legit? and — if you need to leave one — how to cancel a myiq.com subscription.