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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.

The core difference between Sifta and Shortwave is the assumption each tool makes about how you want to spend your time. Shortwave assumes you want a better way to be in your inbox, so it ships a faster client with AI features layered on top. Sifta assumes you do not want to be in your inbox at all, and pushes the AI work into the background while delivering the output through iMessage. Both can be useful, but they are solving different problems. Shortwave is the right pick if your goal is to spend less time per email while still processing each one yourself. Sifta is the right pick if your goal is to stop processing email altogether and let an AI handle the triage on your behalf.

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Quick Answer

Sifta and Shortwave both use AI to improve your relationship with email, but they take fundamentally different approaches: Shortwave is a premium AI-enhanced email client you open and navigate, while Sifta is a background agent that monitors your inbox and texts you via iMessage when something needs your attention. Shortwave excels for power users who want a faster in-app experience; Sifta is the choice for professionals who want to stop visiting their inbox entirely. Both support Gmail, but only Sifta supports Outlook.

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

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

Sound Familiar?

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.

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.

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

How Sifta Fixes This

✓

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.

✓

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.

✓

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

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.

Ready to make your inbox optional?

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