Side by side
Mailfast vs ReplyAssistant
2 tools side by side, on the data we have on file for each.
| Mailfast | ReplyAssistant | |
|---|---|---|
| Price | Free | Free |
| Free tier | Yes | No |
| Our score | 3.9 / 5 | 3.8 / 5 |
| Our line on it | Self-destructs after 60 minutes. | ReplyAssistant checks grammar, translates text, and helps you write better emails or messages, but it may struggle with extremely long documents. |
| Best for | Signing up for services, protecting privacy. | Writers, translators |
| Not for | People needing long-term email storage | Long document writers |
| Platforms | Web | iOS, iPadOS |
| Category | Writing | Writing |
| Best described as | AI Email Writer | AI Email Writer |
| Last checked | 4 Oct 2026 | 5 Oct 2026 |
We have not written a verdict for this pairing
The table above is the data on each tool's own page, side by side. A written head-to-head goes further: it names a winner per use case and says who should stay where they are. Those are written by a reviewer, pair by pair, so this one may not have its verdict yet.