SemiAnalysis
Depends
Confidence: Medium
Buy if you're an AI-infra investor, GPU cloud operator, or chip strategist who needs institutional research and data feeds.
New check
Comparison
SemiAnalysis and Irrational Analysis | Substack both land on Depends.
Buy if you're an AI-infra investor, GPU cloud operator, or chip strategist who needs institutional research and data feeds.
irrationalanalysis.substack.com
Serious semiconductor investors buy this for engineering-depth takes on chips, optics, and AI hardware.
| Compare | ||
|---|---|---|
| Verdict | Depends | Depends |
| Best for | AI/semiconductor investors | Semiconductor stock investors |
| Who it's not for | Anyone expecting analytics software . it's research content, not a tool | Beginner investors wanting simple stock picks |
| Privacy | No vulnerabilities found for SemiAnalysis itself; pasted domain shows no security page and is likely a typo.13 | No product vulnerabilities apply; the Substack platform confirmed a 2026 breach exposing subscriber emails and phone data. |
| Support quality | No support evidence reviewed | No support evidence available |
| Public sentiment | Respected for depth and market influence, but skeptics warn against trusting its calls uncritically.⁸ | Reddit investors frequently share and debate the newsletter's semiconductor theses, and r/FPGA lists it as a recommendation. |
| Biggest gotcha | Double-check the domain: vs . you may be on the wrong site13 | Substack confirmed a data breach exposing user emails and phone data in February 2026 |