shouldiuse.io

VERDICT

Should I use Irrational Exuberance?

(none) - lethain.com

Depends. lethain.com is a free personal blog on engineering leadership, not a product to buy or deploy. Engineering leaders should read it for free; anyone evaluating software should look elsewhere.

Confidence

Low. Based on ~50 public sources; nearly all discuss Robert Shiller's book of the same name, not lethain.com. Only the security-page check directly addresses the site.

Ratings

  • Value for moneyNo evidence in sources.
  • Ease of useNo evidence in sources.
  • Feature depthNo evidence in sources.
  • Support qualityNo evidence in sources.
  • Security postureNo security page found on site.

Pricing

Not disclosed

ModelNot disclosed
Monthly feesNot disclosed
HardwareNot disclosed

Best for

  • Staff+ engineers
  • Engineering managers and CTOs
  • Readers wanting free leadership essays

Not for

  • Anyone shopping for software
  • Teams needing support, SLAs, or admins
  • Buyers wanting Shiller's finance book
  • Procurement or security reviews

Gotchas - check before you buy

medium

Name collides with Shiller's finance book; almost all search evidence is irrelevant to this site.

low

No security page found, so security review steps can't be completed.

Pros and cons

Pros

Not disclosed

Cons

  • No security page published; nothing to vendor-assess
  • Not a product: no pricing, features, or support documented

Sources & method

Analyzed 9/20/2026 - 6 sources - No known vulnerabilities found in the sources reviewed.

official x1review x3security x1news x1

Key stats

  • Not rated

    Rating

  • Not disclosed

    Starting price

  • 6

    Sources

  • Analyzed

  • Value for money. No evidence in sources.
  • Ease of use. No evidence in sources.
  • Feature depth. No evidence in sources.
  • Support quality. No evidence in sources.
  • Security posture. No security page found on site.

Pricing

Not disclosed

Security

No known vulnerabilities found in the sources reviewed.

What users say

All review evidence found covers Robert Shiller's book of the same name, not lethain.com; no user feedback on this site surfaced.

Full analysis

Based on ~50 public sources; nearly all discuss Robert Shiller's book of the same name, not lethain.com. Only the security-page check directly addresses the site.

Not a product — Will Larson's free engineering-leadership blog. Nothing to buy, nothing to deploy.

Methodology

Based on ~50 public sources; nearly all discuss Robert Shiller's book of the same name, not lethain.com. Only the security-page check directly addresses the site.

Sources

  1. Irrational Exuberance by Robert J. Shiller — Goodreadsgoodreads.com
    review
  2. Security pagelethain.com
    security
  3. Anyone read Irrational Exuberance? : r/REBubblereddit.com
    review
  4. Irrational Exuberance: A Book Revieweinvestingforbeginners.com
    review
  5. Irrational Exuberance, Third Edition — Princeton University Presspress.princeton.edu
    official
  6. Irrational exuberance — Wikipediaen.wikipedia.org
    news

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