shouldiuse.io

Categories

VERDICT

Should I use Ipip?

Not disclosed - ipip.org

Depends. Free, peer-validated public-domain Big Five items — great if you can run and score a questionnaire yourself. If you want hosted scoring and polished reports, buy a wrapper like NovoPsych or Truity instead.

Confidence

Medium. Based on ~40 public sources; many 'IPIP' hits are unrelated (IP-in-IP tunnels, geolocation, banking) and were excluded.

Ratings

  • Value for money
  • Ease of use
  • Feature depth
  • Support qualityNo evidence of any support model
  • Security postureNo product-specific findings; only name collisions

Pricing

Free

Public domain

ModelNot disclosed
Monthly feesNot disclosed
HardwareNot disclosed
Free tierYes

Best for

  • Academic personality researchers
  • Psychologists needing public-domain scales
  • Survey builders embedding validated Big Five items
  • Self-explorers on a zero budget

Not for

  • Teams wanting hosted scoring, dashboards, and polished reports
  • Non-technical users — raw items, zero hand-holding
  • Anyone needing vendor support or SLAs
  • Network engineers — the IPIP tunnel protocol is unrelated

Gotchas - check before you buy

medium

Third-party sites charge for IPIP-based tests though the underlying items are free.

medium

No vendor support or SLA — it is an academic resource, not a product.

medium

Verify identity before entering data; documented official site is.org.

low

CVE search results conflate IPIP with Linux kernel tunnels and an npm package — none apply here.

Pros and cons

Pros

  • Free and public-domain, unlike commercial personality tests
  • Validated in peer-reviewed reliability studies
  • Huge item pool: 3,320 items
  • Anyone may administer the scales
  • Multiple lengths available (50, 120, 300 items)

Cons

  • No hosted app — you administer and score tests yourself
  • Users often struggle to interpret raw results
  • Name collides with IP tunnels, geolocation vendors, banking terms
  • Documented official site is.org, not

Sources & method

Analyzed 10/02/2026 - 8 sources - No known vulnerabilities found in the sources reviewed.

official x4review x3security x1

Key stats

  • Value for money: 5/5

    Rating

  • Free

    Starting price

  • 8

    Sources

  • Analyzed

  • Value for money: 5/5. Free public domain; no license needed
  • Ease of use: 2/5. Raw items only; users build own front-ends
  • Feature depth: 4/5. 3,320 items; many scale lengths and facets
  • Support quality. No evidence of any support model
  • Security posture. No product-specific findings; only name collisions
  • Free Cost Public-domain personality items
  • 3,320 Item pool Items listed on the official site
  • 50–300 Item lengths IPIP-50, 120 and 300 variants in use
  • ipip.ori.org Official home Evidence points here, not ipip.org

Pricing

Public domain

Free

  • All 3,320 items free to use
  • Administer for research or practice
  • No paid tier from the project itself

Security

No known vulnerabilities found in the sources reviewed.

What users say

Hobbyists and students widely take IPIP-based Big Five tests, often needing help interpreting results or building friendlier front-ends.

“Just took IPIP-NEO-300 (I think I'm doomed)”
Reddit, r/intj
“I made a user-friendly implementation of the IPIP-NEO ...”
Reddit, r/psychology
“Can someone interpret my IPIP 300 results particularly ...”
Reddit, r/BigFive
Full analysis

Based on ~40 public sources; many 'IPIP' hits are unrelated (IP-in-IP tunnels, geolocation, banking) and were excluded.

Free, academically validated Big Five item pool. Nothing to buy — but no scoring app, support, or hand-holding.

Methodology

Based on ~40 public sources; many 'IPIP' hits are unrelated (IP-in-IP tunnels, geolocation, banking) and were excluded.

Sources

  1. IPIP Home (official)ipip.ori.org
    official
  2. 3320 IPIP Itemsipip.ori.org
    official
  3. Administering IPIP Measures, with a 50-item Sampleipip.ori.org
    official
  4. International Personality Item Pool — Wikipediaen.wikipedia.org
    official
  5. Reliability and Concurrent Validation of the IPIP Big-Fivepmc.ncbi.nlm.nih.gov
    review
  6. Psychometric Properties of the International Personality Item Poolpmc.ncbi.nlm.nih.gov
    review
  7. Reddit: user-built friendly IPIP-NEO implementationreddit.com
    review
  8. OpenCVE: Ipip CVE search (name collisions)app.opencve.io
    security

Rate this review

Anonymous. You can change your vote.

Loading votes…

Comments

One queue. No nested comments. Give a display name first. Limit: 200 words per comment and 7 comments per day. You can edit or delete yours.

Save a name to write a comment.

0 / 200 words

No comments yet.