Replai vs Shortwave
Shortwave is an AI-native Gmail client with thread summaries and inline suggestions. Replai learns your voice and drafts replies wherever you already work. Here is how they line up.
Shortwave replaces your email client. Replai doesn't.
To use Shortwave, you leave Gmail's native interface and move into Shortwave's app. It becomes your inbox. Replai sits beside whatever you already use - keep Gmail or Outlook exactly as it is and draft replies separately. One asks you to migrate. The other asks you to paste.
Replai vs Shortwave: which should you use?
Shortwave replaces your Gmail client with built-in AI for inbox bundling, reply suggestions, and message search. Replai works with the client you already use and focuses on personalized replies built from your saved writing examples. Shortwave means migrating to a new client. Replai does not. Use Gmail and want a redesigned inbox with AI built in? Shortwave is worth a look. Want better replies without changing clients? Replai is simpler.
Best for at a glance
| Use case | Replai | Shortwave |
|---|---|---|
| Try without connecting email account | ✓ | ✗ |
| Personalized replies matching your writing style | ✓ | ~ |
| Inbox organization and triage | ~ | ✓ |
| Free plan with meaningful features | ✓ | ~ |
~ = partial support, limited availability, or requires additional configuration.
Full feature comparison: Replai vs Shortwave
| Feature | Replai | Shortwave |
|---|---|---|
| Email reply generation | ✓ | ✓ |
| Works without inbox access | ✓ | ✗ |
| Personalized writing style | ✓ | ~ |
| Inbox organization | ~ | ✓ |
| Gmail support | ✓ | ✓ |
| Outlook support | ✓ | ✗ |
| Thread summarization | ~ | ✓ |
| Free plan | ✓ | ~ |
| No account required to try | ✓ | ✗ |
| Mobile app | ~ | ✓ |
~ = partial support, limited availability, or in development. Last verified June 2026.
Replai vs Shortwave pricing
Prices shown are approximate. Verify at the vendor's website before purchasing.
What this costs over a year
Shortwave Pro is about $144 a year, plus the hidden cost of learning a new client. Replai’s drafting is free and Pro is ~$72 a year with no client change. If you would only use Shortwave for its AI replies, you are paying double Replai’s price - and migrating - to get them.
Setup and ease of use: Replai
Replai's free reply generator needs no account, no Gmail connection, and no client switch - paste text, get a draft. Want it inside your mailbox? Pro connects over OAuth in under two minutes. Either way, nothing moves: you keep your inbox and the way you already reach it.
- No email account connection for the free tool
- Account setup takes under two minutes
- Works in any browser, desktop or mobile
- No browser extension to install
Setup and ease of use: Shortwave
Shortwave replaces your Gmail client outright. You sign in with your Google account and Shortwave becomes your main inbox interface. All your existing Gmail is still there - just inside Shortwave's redesigned layout.
Setup is quick, but you have to be comfortable doing all your daily email in an unfamiliar client.
Replai vs Shortwave: privacy and data access
Replai data access
- The free tool needs no email account access
- You decide exactly what goes into the reply generator
- Your reply identity stores only the examples you choose to save
- The free tool stores no raw email content
- More in our security and privacy standards
- Read our full privacy policy
Shortwave data access
- Needs Google account access as a Gmail client replacement
- Stores and processes your email through Shortwave's infrastructure
- AI features read email content to build summaries and suggestions
- Read Shortwave's privacy policy before you migrate your Gmail
- Shortwave is Google-backed; check current data-sharing terms
Shortwave Gmail and Outlook support
| Email platform | Replai | Shortwave |
|---|---|---|
| Gmail (personal) | ✓ | ✓ |
| Gmail (Google Workspace) | ✓ | ✓ |
| Outlook (personal) | ✓ | ✗ |
| Outlook (Microsoft 365) | ✓ | ✗ |
| Works without email client connection | ✓ | ✗ |
Where Replai may be better
- You use Outlook as well as Gmail - Shortwave is Gmail-only, with no Outlook support
- You do not want to leave your current client for a new app
- You want drafts that match your voice, formal or casual
- You want a reply generator that works without connecting your inbox at all
- You want it working now, without moving your email history into a new client
Where Shortwave may be better
- You are a Gmail user willing to switch clients entirely
- You want inbox organization, AI replies, and search in one interface
- You prefer a redesigned inbox over your current Gmail layout
- You work asynchronously with teammates in shared email threads
- You want thread summaries inline, without leaving your inbox
Going from Shortwave back to Gmail (and what you keep)
Shortwave reads your existing Gmail account, so leaving is mostly a matter of signing back into the Gmail interface - your mail, labels, and history are already there. Shortwave-only structures like bundles and snoozed states do not carry over, so check for snoozed threads before you stop, then revoke its access from your Google Account’s third-party access page.
Liked Shortwave’s AI replies but not the client switch? That is the exact gap Replai fills - drafting in your own voice from inside whatever client you use. Save a few sent emails as writing examples and compare the output to what Shortwave suggested. The personalization approach is different, not just the interface.
Our recommendation
If you are a committed Gmail user willing to adopt a new client and want AI woven through triage, bundling, and reply suggestions, Shortwave is worth trying. If you want AI reply help without changing clients, Replai needs no migration and starts free with no account.
How this comparison was written
For this Shortwave comparison, we looked at Gmail-client replacement, AI summaries, inbox bundling, reply suggestions, and migration effort. A tool that swaps the whole interface deserves different judgment than one that works beside your current client.
We make Replai, so we flag our privacy and setup advantages with care. We also note where Shortwave's integrated Gmail experience wins for people who actually want a redesigned inbox, not a standalone drafting workflow.
Read our full methodology About ReplaiFrequently asked questions
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Get a reply in your own words without connecting your inbox. Use the comparison above to decide whether you need a heavier tool.