Best open-source psychometrics tools, ranked by real installs (Oct 2026)
We keep install counts on every app in our catalog, so this psychometrics roundup is built from real numbers, not hunches.
The catalog currently carries 10 psychometrics options. LimeSurvey leads on installs, and several entries trade places week to week.
How they stack up
| # | App | Category | Installs | From |
|---|---|---|---|---|
| 1 | LimeSurvey The classic open-source survey system — question types, quotas, tokens & MPDF export | Psychometrics | 2 800 | €0.023/hr |
| 2 | Big Five Personality Test The open-source Big Five (OCEAN) assessment with per-trait breakdowns | Psychometrics | 1 400 | €0.023/hr |
| 3 | Open-Source Psychometrics Project Community-run personality test platform — IPIP-style inventories with instant scoring | Psychometrics | 760 | €0.023/hr |
| 4 | PsyToolkit Survey + cognitive-task toolkit: reaction-time experiments and questionnaires in the browser | Psychometrics | 540 | €0.023/hr |
| 5 | The Experiment Factory Reproducible psychology experiment containers — batteries of standard tasks | Psychometrics | 480 | €0.046/hr |
| 6 | JATOS Just Another Tool for Online Studies — host, run and manage web experiments | Psychometrics | 420 | €0.023/hr |
| 7 | OpenJung Jungian type explorer — cognitive-function questionnaires with open scoring | Psychometrics | 410 | €0.018/hr |
| 8 | International Personality Item Pool The public-domain IPIP inventory library — 3000+ personality items, free to use | Psychometrics | 350 | €0.018/hr |
| 9 | formr R-powered survey framework — complex questionnaires, diaries and longitudinal runs | Psychometrics | 310 | €0.046/hr |
| 10 | SAPA Project Synthetic Aperture Personality research platform — large-sample web assessments | Psychometrics | 260 | €0.046/hr |
What each one is good at
LimeSurvey
Its daily work — build questionnaires with logic is what LimeSurvey does best. It runs comfortably on 1 vCPU / 2 GB here. Best for researchers. Start here if you want the safe pick.
Big Five Personality Test
Big Five Personality Test covers take the 50-item Big Five test without demanding a manual. Plan for 1 vCPU and 2 GB of RAM. Made with coaches in mind. Worth a demo before you commit to the leader.
Open-Source Psychometrics Project
Open-Source Psychometrics Project covers run personality inventories without demanding a manual. Spec: 1 vCPU, 2 GB RAM, 30 GB disk. Best for psychology hobbyists. Lesser known, often a better fit for smaller teams.
PsyToolkit
Its daily work — build cognitive experiments (Stroop is what PsyToolkit does best. It runs comfortably on 1 vCPU / 2 GB here. Best for psychology teachers. Lesser known, often a better fit for smaller teams.
What it costs to run
You can try any of them for the price of a coffee per day: Pay as you go works out near €0.046 an hour at full spec, and pausing stops the meter. The install wizard pre-selects the right plan for you.
Generated 2026-10-22 from live catalog data · all guides