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Sifta vs Shortwave: Two Very Different Ways to Fix Email Overload

Sifta and Shortwave both use AI to help you get on top of your inbox — but they take fundamentally different approaches. Shortwave is a beautiful, AI-enhanced email client you switch to. Sifta is a background agent that monitors your inbox and texts you via iMessage when something needs your attention. Which one is right depends entirely on how you want to relate to email.

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Sound Familiar?

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You've switched email clients before — the first week feels great, then six weeks later you're back to the same inbox-checking habit, just in a different app.

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Shortwave is genuinely beautiful, but it's still a destination you have to travel to. When you're in back-to-back meetings, it's as invisible as Gmail.

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You don't want a better inbox interface — you want your inbox to stop demanding your constant attention.

How Sifta Fixes This

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Sifta isn't a client you switch to — there's no interface to learn, no shortcut keys to memorize, no new habit to build. It works silently in the background and reaches you through iMessage, the messaging app already on your iPhone.

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When something important lands in your inbox, Sifta texts you: sender, summary, and whether action is needed. You decide in seconds — no app to open.

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Shortwave makes your inbox faster. Sifta makes your inbox optional. They're solving different problems.

Sifta vs Shortwave: Side-by-Side

Feature
Sifta
Shortwave
How it works
Background AI agent — monitors your inbox and texts you
AI-enhanced email client — you open and use it like Gmail
Delivery channel
iMessage texts to your iPhone
In-app (web browser + iOS/Android app)
AI email summaries
Yes — texted proactively, no inbox visit needed
Yes — read inside the Shortwave app
Inbox-free days
Yes — Sifta handles triage, texts you what matters
No — you visit Shortwave daily to process email
No separate app required
Yes — uses your existing Messages app
No — requires the Shortwave app or web interface
Gmail support
Yes
Yes
Outlook support
Yes
No (Gmail / Google Workspace only)
Pricing
$49 / month
Free tier available; Pro at $18 / user / month
Best for
Professionals who want to stop going to their inbox
Power users who want a faster, smarter in-app experience

What You Get

No app to install — Sifta arrives as a contact in your existing Messages app

Gmail AND Outlook supported (Shortwave is Gmail-only)

Works while you're in meetings, travelling, or heads-down without a screen

2–5 targeted alerts per day replace 77+ inbox checks

Frequently Asked Questions

What's the main difference between Sifta and Shortwave? +

Shortwave is a premium email client that replaces Gmail's interface with a faster, AI-enhanced experience — think smarter sorting, AI-written replies, and a cleaner inbox UI. Sifta is not an email client at all. It's a background agent that reads your inbox and texts you via iMessage when something genuinely needs your attention. With Sifta, you never need to open an email app.

Does Shortwave support Outlook? +

No. As of 2026, Shortwave supports Gmail and Google Workspace accounts only. Sifta fully supports both Gmail and Outlook via standard OAuth.

Can I use Sifta and Shortwave at the same time? +

Yes. Sifta operates as an independent layer on your Gmail or Outlook account. You can keep Shortwave as your read/write interface while Sifta handles proactive alerting. Many users find this combination useful: Shortwave for when they do sit down to process email, Sifta so they don't have to sit down as often.

Shortwave has a free tier — does Sifta? +

Sifta is currently $49/month with early access. Shortwave offers a free tier with limited features and a Pro plan at $18/month. If cost is the deciding factor, Shortwave's free tier offers low-risk trial. If eliminating inbox visits is the goal, Sifta offers something Shortwave does not.

Who is Sifta best for vs Shortwave? +

Sifta is best for busy professionals — founders, executives, investors, recruiters — who want to reduce the time they spend on email to near-zero. Shortwave is best for power users who enjoy being in their inbox and want the fastest, most feature-rich Gmail experience available. Both are high-quality products for genuinely different use cases.

Does Sifta summarise emails the way Shortwave does? +

Yes, but with a different delivery model. Shortwave shows AI summaries inside the app when you open it. Sifta texts you the summary proactively the moment an important email arrives — before you've ever opened your inbox. The result is that you're informed in real time rather than discovering summaries when you eventually sit down to check email.

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Ready to make your inbox optional?

Sifta is in early access at $49/month. Works with Gmail and Outlook — setup takes 2 minutes.

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