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Shortwave vs Subjectgenius
A factual side-by-side comparison of Shortwave and Subjectgenius. We compare pricing, categories, free tiers and official websites — no invented scores.
Updated 2026-10-22
Quick take
Both Shortwave and Subjectgenius are Freemium. Pick the one whose tagline and categories match your use case, then check the alternatives below.
| Pricing | Freemium | Freemium |
|---|---|---|
| Categories | Email / AI Chat / Marketing | |
| Best for | An AI inbox on top of Gmail | Subjectgenius — AI Email for marketing |
| Free tier | Yes — free or freemium | Yes — free or freemium |
| Website | www.shortwave.com | subjectgeni.us |