Superhuman vs Shortwave (2026): Which Email AI Wins Now?

Last updated: 2026-07-06

Superhuman and Shortwave now cost about the same to get started — Shortwave’s 2026 reprice to a per-seat, team-oriented model (Business at $30/seat/month) put it right next to Superhuman’s $30 Starter plan. The old “Shortwave is 2-3x cheaper” argument is dead. The real decision now is workflow: Superhuman wins on raw speed and passive Auto Drafts; Shortwave wins on AI-native search and cross-app automation via Tasklet.

Quick Verdict

• Superhuman and Shortwave now cost about the same to start — the old price-driven argument for Shortwave no longer holds.
• Superhuman wins on speed and passive Auto Drafts that appear without prompting.
• Shortwave wins on AI-native semantic search and Tasklet’s cross-app automation.

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Comparison Snapshot

How I Evaluated This

I judged both tools on real email workflow — speed, drafting quality, and how they fit into a broader tool stack — rather than by price alone, since Shortwave’s pricing changed enough since this piece first published that the original cost argument no longer holds. Every price below was re-verified in July 2026.

Where Superhuman Wins

Speed. Nothing touches it. Every action in Superhuman is optimized for speed from the ground up. Load times are near-instant. Keyboard shortcuts cover everything — archive, snooze, reply, move, search — without lifting your hands from the keyboard. Users consistently report processing email 2-3x faster than in any other client. After a few weeks with it, going back to regular Gmail feels like driving through mud.

Passive Auto Drafts. This is the feature that separates Superhuman from everything else. You open a thread that needs a reply. The draft is already there, written in your voice, based on the conversation context. You didn’t ask for it. You didn’t type a prompt. It just appeared.

I’ve built something similar for clients using a Lindy agent — analyzing their last few dozen sent emails to extract their writing patterns, then pre-drafting replies in that style. The first time they saw a draft that sounded immediately like them, the reaction was always the same. “This is uncanny.” That’s where Superhuman’s Auto Drafts has gotten. It trains on your full email history. The longer you use it, the better it gets.

The difference between Superhuman’s Auto Drafts and Shortwave’s Ghostwriter is this: Superhuman’s draft is already sitting there when you open the email. Shortwave’s AI writes a draft when you ask it to. Both end up with a good draft. One requires a step, one doesn’t.

Auto Labels. Incoming email gets sorted before you even open the app. Needs a reply, waiting on someone, FYI, cold pitch — triage is done. For anyone who spends real mental energy deciding what to do with each email as it arrives, this is a meaningful reduction in friction.

Where Shortwave Wins

Price used to be the story here — it isn’t anymore. Shortwave repriced in 2026 to a per-seat, team-oriented model: Business at $30/seat/month, Premier at $45, and Max at $120. There’s no more $7 Personal or $14 Pro tier. At the entry level, Shortwave Business ($30/month) costs almost exactly the same as Superhuman’s Starter plan ($30/month). Over three years, Shortwave runs about $1,080 and Superhuman about $1,188 — a gap of roughly $108, not the $700-900 difference this comparison used to turn on.

Superhuman still has no free tier. Shortwave’s free tier still exists, but it’s limited AI — not a real trial of Ghostwriter or Tasklet.

So if you were choosing Shortwave purely to save money, that reason is largely gone. The decision now comes down to which workflow — passive drafting and speed, or AI-native search and cross-app automation — actually fits how you work.

Tasklet cross-app automation. This launched in October 2025 and it’s a big deal for anyone who wants their inbox connected to their broader workflow. Tasklet is essentially an automation layer built specifically for Shortwave — connects your email to Slack, Notion, Asana, HubSpot, and thousands of other tools through a natural-language interface.

You tell it what you want to automate, and it figures out how to wire things together. Auto-turn emails into todos. Flag certain types of messages and drop them into a project tracker. Summarize weekly digests and post them to Slack. It runs in the background without you doing anything.

Superhuman has no equivalent. It’s a fast email client with good AI drafting, but it doesn’t connect outward into your tool stack the way Shortwave does.

AI Search. Shortwave’s semantic search across your full email history is genuinely useful. You can describe what you’re looking for in plain language — “that contract from the Singapore client last year” — and it finds it. Superhuman has search, but it’s keyword-based. For heavy email archives, this is a real difference.

Stability. Shortwave is an independent company doing one thing. No acquisition news. No bundling confusion. Just an email app trying to be the best email app. In 2026, that kind of focus matters more than it used to.

The AI Drafting Comparison

Both tools train on your writing history. The output quality from both is genuinely good. But the experience of using them is different.

Superhuman: you open an email, the draft is there. Review, tweak, send.

Shortwave: you open an email, you tap the AI button or ask Ghostwriter to draft a reply. It writes something that sounds like you. Review, tweak, send.

The end result is similar. The workflow has one more step with Shortwave. For 50+ emails a day, that adds up. For 20 emails a day, you won’t notice.

Shortwave recently upgraded to Claude Sonnet 4.6 as its base AI model (Advanced tier gets Sonnet 4.6 with adaptive thinking, Expert tier gets Opus 4.6). That’s a capable model for email writing. Whether Superhuman’s voice training beats Claude Sonnet trained on your history is honestly hard to call without doing it side by side… but Superhuman’s approach of passive inference (it watches how you write, then pre-drafts, with no prompting) is architecturally different from Shortwave’s chat-first approach.

Pricing Table

The Grammarly Acquisition Wildcard

In July 2025, Grammarly acquired Superhuman, which had last been valued at around $825 million in a 2021 funding round — the actual acquisition terms were undisclosed. By October 2025, Grammarly had rebranded its parent company to “Superhuman” and the email app became “Superhuman Mail,” bundled into a “Superhuman Suite” with Coda, Grammarly’s writing tools, and Superhuman Go.

A few months later, the entity acquired Rows, a spreadsheet startup.

The honest read: this is a lot of product bundling in a short period for something people paid a premium for specifically because it was focused and fast. Rahul Vohra is still running Superhuman Mail. The core product hasn’t degraded.

But if you’re pricing out Superhuman today as a new customer, you’re buying into a company that is actively being integrated into a larger platform. That integration might make the product better (Grammarly’s writing AI improving Auto Drafts is a reasonable thesis). It might dilute it. Nobody knows yet.

Current existing users on old pricing: no immediate reason to leave.

New users evaluating fresh today: weigh the uncertainty. The product is still excellent. The company story is messier than it was.

The 3-Year Cost Math

At $33/month annual for Superhuman vs $30/month for Shortwave Business:

• Shortwave Business over 3 years: ~$1,080
• Superhuman over 3 years: ~$1,188
• Difference: ~$108

That’s a gap of about $108 over three years — a fraction of what this comparison used to claim. If you’re choosing based on price alone, it’s genuinely close to a coin flip now. If Superhuman saves you 4 hours per week and you value your time at $50/hour, that’s $10,400 in time value annually, but that math was never really about the $108 gap in the first place.

If you need Shortwave’s Premier tier ($45/seat/month) to match Superhuman’s full AI feature set, the comparison actually reverses — Shortwave becomes the pricier option over three years (~$1,620 vs Superhuman’s ~$1,188).

Who Should Pick Which

Pick Shortwave if:

• You want AI-native semantic search across your full email history
• You use Gmail or Google Workspace
• You want your inbox connected to your other tools (Tasklet automation)
• You send fewer than 50 emails a day
• Team features and shared inbox context matter to you

Pick Superhuman if:

• Email is genuinely your job and you’re sending 50+ emails daily
• You want passive Auto Drafts that appear without prompting
• You’re willing to invest in learning the keyboard system
• You also use Outlook (Shortwave doesn’t support it)
• You were already paying for Grammarly Business

Price is no longer the deciding factor here — at the entry level, the two now cost almost exactly the same. This comes down to workflow: pick Superhuman for speed and passive drafting, Shortwave for AI-native search and cross-app automation.

A Note on SaneBox

Worth mentioning: SaneBox works on top of either client. It’s a filtering layer that sits between your email provider and your client, pushing newsletters and low-priority stuff into a separate folder before it hits your inbox. Starts at $7/month.

Shortwave Free + SaneBox gets you a smart inbox experience for $7/month total. That’s a combination worth knowing if you’re not ready to commit to a paid email client yet.

Learn more about SaneBox

FAQ

Does Shortwave work with Outlook?

No. Shortwave is Gmail and Google Workspace only. If you need Outlook support, Superhuman is the only AI email client that covers both. Most people in this comparison are Gmail users, but if you’re on a Microsoft stack, it’s a dealbreaker for Shortwave.

What is Tasklet and does it cost extra?

Tasklet is a separate automation product that integrates natively with Shortwave. It connects your inbox to apps like Slack, Notion, Asana, and HubSpot, and runs automations 24/7 without you doing anything. It’s a separate subscription from Shortwave itself. If cross-app automation is a priority, check Tasklet’s pricing alongside Shortwave Pro.

What happened to Superhuman after the Grammarly acquisition?

Grammarly acquired Superhuman in October 2025 and rebranded the parent company to “Superhuman.” The email app is now called “Superhuman Mail” and is part of a “Superhuman Suite” that bundles in Coda, Grammarly’s writing tools, and Superhuman Go. Rahul Vohra remains CEO of Superhuman Mail. New users access full features through plans tied to the suite, starting around $33/month annually.

Can I use both Superhuman Auto Drafts and Shortwave Ghostwriter to compare?

Partially. Shortwave’s free tier lets you test the basics, but full Ghostwriter access now requires the Business plan ($30/month) since Shortwave discontinued its cheaper Personal and Pro tiers in 2026. Superhuman doesn’t have a free tier at all, but they offer onboarding sessions. The most honest comparison is to actually send email from both for a week. The passive vs active drafting difference becomes obvious immediately once you’re in real use.

Is Shortwave’s AI as good as Superhuman’s?

For voice matching, both are strong. Shortwave now runs on Claude Sonnet 4.6, which is a capable model for writing. The quality of drafts from both is genuinely good. The bigger difference is workflow: Superhuman’s drafts appear passively, Shortwave’s require a prompt. Whether that step matters depends entirely on your email volume.

Related: Best AI Email Tools (2026) | Superhuman vs Spark (2026) | SaneBox Review: Does AI Email Filtering Actually Work?

Want help building a custom email automation system? Check out our AI workshops at Asian Efficiency.

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