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A data-grounded look at how these two writing & content tools stack up — to help you pick the right writing & content tool in 2026.
Quick verdict
There's barely a point between ContentIn and Shortwave on our Editor Score. Pick ContentIn if you want AI ghostwriter trained on your writing style; choose Shortwave for voice-aware AI reply drafting. On pricing, Shortwave is the one with a free or freemium plan, so it's the cheaper place to start.
| Rating | 4.3 / 5 | 4.4 / 5 |
| Pricing | Subscription | Freemium |
| Free tier | ||
| Best for | AI ghostwriter trained on your writing style | voice-aware AI reply drafting |
AInexfinder Editor Score — our editorial rating from features, value and pricing, blended with verified user reviews where a tool has them.
AI ghostwriter and scheduler for LinkedIn
AI-native email client that drafts in your voice
Choose ContentIn if…
Choose Shortwave if…
It comes down to fit, not a single winner: ContentIn leans into AI ghostwriter trained on your writing style, while Shortwave is built for voice-aware AI reply drafting. Our Editor Score can't separate them (4.3 vs 4.4), so let pricing and feature fit break the tie. Shortwave is the lower-cost place to start thanks to its free or freemium plan; the other is worth a trial if its feature set fits better.
Shortwave has the higher AInexfinder Editor Score (our editorial rating from features, value and pricing, blended with verified user reviews where a tool has them), but "better" depends on your needs — compare features, pricing and the pros & cons above to decide.
ContentIn (subscription) is best for AI ghostwriter trained on your writing style, while Shortwave (freemium) is best for voice-aware AI reply drafting. See the full feature and pricing comparison above.
Shortwave has a free or freemium plan, so it's the cheaper way to start. For paid plans, check each tool's current pricing on its review page.
Shortwave is usually the easier starting point thanks to a lower barrier to entry. Beginners should favour a free tier and a simple interface over raw power.
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Senior AI Tools Reviewer
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Last updated June 2026. Comparisons are ranked by our Editor Score (features, value and pricing, blended with verified user reviews where a tool has them) — see our methodology.