Quick answer
Superhuman is a premium, keyboard-driven email client built for speed and focus, with AI features layered on top of a famously polished, fast interface. Shortwave is built directly on Gmail, is cheaper, and leans harder into AI as the core feature — AI-written replies, automatic categorization, and a built-in AI assistant you can just ask questions to about your inbox. Superhuman wins on raw interface speed; Shortwave wins on AI depth and price.
Both of these exist because Gmail's default interface, for power users, has not fundamentally changed in a decade. Both charge you to fix that, just with different priorities.
Superhuman: speed first, AI second
Superhuman's whole identity is built around speed — keyboard shortcuts for nearly everything, an onboarding call that trains you to use them, and an interface stripped of anything that slows you down. AI features (auto-summarize threads, write-a-reply, triage suggestions) are real and useful, but they are additions to an already-strong product, not the reason it exists.
- Extremely fast, keyboard-first interface with a real onboarding process
- AI thread summaries, smart reply drafting, and inbox triage
- Works with Gmail and Outlook accounts
- Premium pricing — noticeably more expensive than most competitors
Shortwave: AI first, built on Gmail
Shortwave takes the opposite approach: it is explicitly an AI-native email client, built directly on top of your existing Gmail account rather than replacing your provider. You can ask its AI assistant to find an email, summarize a thread, draft a reply in your voice, or auto-sort incoming mail into categories — all as first-class features, not add-ons.
- Built on Gmail — your data stays in your Gmail account, Shortwave is the interface layer
- AI assistant you can chat with directly about your inbox
- Automatic categorization and bundling of similar emails
- Lower price point than Superhuman, with a usable free tier
Which one is actually faster to use day to day?
Superhuman, for pure navigation and triage speed once you've learned its shortcuts — that muscle memory investment is the whole point of the onboarding call. Shortwave is faster for a different kind of task: asking a question about your inbox in plain English instead of manually searching and reading through threads.
Is Superhuman worth the extra cost?
If you live in your inbox for hours a day and value shaving seconds off every single action, the muscle-memory speed gain compounds and the price starts to make sense. If your email volume is moderate, or you'd rather have the AI do more of the actual work instead of just letting you move faster through it manually, Shortwave's price and feature mix is the better deal.
Neither tool is a substitute for actual inbox habits. Even the fastest AI email client won't save someone who lets 4,000 unread emails accumulate and expects the software to reconcile that alone.
What about privacy — are these tools reading my email?
Both need access to your inbox content to work, since that access is the product. Read each company's current privacy policy for specifics on data retention and whether email content is used for model training, since these policies do change over time and matter more than marketing copy.
Related reading
Bottom line
Choose Superhuman if speed and interface polish are worth a premium to you. Choose Shortwave if you want AI doing more of the actual inbox work at a friendlier price. Both beat stock Gmail for anyone drowning in email — the choice between them comes down to what kind of help you actually want.
