Superhuman

The most productive email app. Save 4 hours a week.

4.8•91 reviews•

4K followers

The most productive email app. Save 4 hours a week.

4.8•91 reviews•

4K followers

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Superhuman is the most productive email app ever made. Fly through your inbox, with powerful AI features for writing, summarizing, replying, and searching. Be more responsive to what matters most, with Split Inbox and follow-up Reminders. And collaborate faster than ever before, with Team Comments. Superhuman works seamlessly with Gmail and Outlook, and helps teams save four hours per person, every single week.

The Best Superhuman Alternatives

The best Superhuman alternatives are Shortwave, Spark, Missive, Inbox Zero, and Slashy.

Shortwave

4.7 ·

Choose Shortwave if...

✓you want bundled email delivered at scheduled times
✓you prefer structured, GTD-style processing for Gmail
✓you want AI summaries embedded in email threads

See details ↓

Spark

4.1 ·

Choose Spark if...

✓you manage multiple accounts across several devices
✓you want to screen unfamiliar senders before inbox delivery

See details ↓

Missive

4.6 ·

Choose Missive if...

✓your team needs shared ownership and email escalation
✓you want internal discussions alongside customer conversations
✓you need customizable rules for team email workflows

See details ↓

Inbox Zero

4.8 ·

Choose Inbox Zero if...

✓you need bulk cleanup of accumulated email subscriptions
✓you want to review clutter by sender
✓you prefer an open-source inbox cleanup tool

See details ↓

Slashy

5.0 ·

Choose Slashy if...

✓you need a unified inbox for multiple accounts
✓you want natural-language control over labels and automations
✓you want email access through iMessage or Slack

See details ↓

What to Consider

Superhuman is a prominent premium email client known for keyboard-first workflows, fast inbox processing, and AI assistance. Its alternatives take distinct approaches: Shortwave emphasizes bundled, scheduled email triage, Spark focuses on multi-account convenience and sender screening, and Missive centers on team collaboration and accountability. Inbox Zero offers an open-source approach to subscription cleanup, while Slashy stands out for its unified inbox and conversational AI controls.

The evaluation considered inbox organization, AI usefulness, account and device support, collaboration, ease of use, and value. Review-backed benefits were distinguished from product-described capabilities, with particular attention to version-specific complaints, platform limitations, and the depth of evidence behind direct Superhuman comparisons.

Shortwave

Intelligent email, powered by AI — Smarter & faster email designed for stress-free productivity

4.7 · 23 reviews

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Bundled email and scheduled delivery make Shortwave a compelling Superhuman alternative for users who want more control over when messages demand attention. Grouping related messages creates a clearer overview of incoming mail, while scheduled delivery lets entire categories arrive at designated times. This approach suits people who prioritize structured processing over working through individual messages as they appear.

Shortwave also embeds AI assistance into everyday email tasks through thread summaries and contextual explanations. Those tools make it useful even for people who want help understanding conversations rather than composing replies. Responsive keyboard navigation and a GTD-friendly workflow preserve the efficiency that attracts many users to Superhuman.

The main trade-off is that Shortwave’s organizational approach can feel prescriptive, particularly when automatic labels classify messages too aggressively. It is strongest for Gmail users who welcome bundles and scheduled processing, rather than those seeking an exact replica of Superhuman’s workflow.

Best for

Best for high-volume Gmail users who want bundled email, scheduled delivery, and structured inbox processing.

Standout features

✓Bundles for related email
✓Scheduled delivery by email category
✓Integrated AI thread summaries
✓Keyboard-driven inbox triage
✓Built-in unsubscribe tools

Spark

All in one email solution.

4.1 · 70 reviews

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Managing several email accounts across devices is Spark’s clearest appeal as a Superhuman alternative. Its account synchronization simplifies setup on additional devices, reducing the friction of reconnecting each inbox separately. This makes it especially useful for people juggling personal, client, and business addresses.

Spark’s Gatekeeper adds control over unfamiliar senders by letting users approve or block them before their messages clutter the main inbox. Separate groupings for newsletters, notifications, and priority senders support a more selective approach to daily triage. Automatic summaries for selected senders can also make recurring newsletters easier to digest.

Spark is a relevant option for users reconsidering Superhuman’s subscription cost, although value depends on the features and plan required. Its redesigned interface and platform-specific stability issues are important trade-offs, so multi-account convenience should not be mistaken for a universally smoother experience.

Best for

Best for people managing multiple email accounts across devices who also want stronger screening of unfamiliar senders.

Standout features

✓Multi-account synchronization across devices
✓Gatekeeper screening for unfamiliar senders
✓Newsletter and notification grouping
✓Automatic summaries for selected senders
✓Internal team email discussions

Missive

Email, Chat and Tasks for Productive Teams

4.6 · 11 reviews

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For teams whose email needs extend beyond individual productivity, Missive offers a collaboration-centered alternative to Superhuman. Its strengths lie in coordinating responsibility, escalating conversations, and keeping colleagues aligned around external communication. The distinction is not simply having comments, but making shared email an operational workspace.

Internal discussions sit alongside the relevant conversation, reducing forwarding and separate messages that fragment context. Teammates can tag colleagues, coordinate handoffs, and use custom rules to support repeatable workflows. This makes Missive particularly useful for support, operations, and service teams where accountability matters as much as inbox speed.

Missive also offers extensive customization without abandoning a familiar email interface, giving freelancers a reason to consider it alongside team users. Its breadth introduces more setup complexity than a narrowly focused personal email workflow, but that trade-off makes sense when coordination is the primary goal.

Best for

Best for support, operations, and service teams that need shared email accountability, internal discussion, and reliable handoffs.

Standout features

✓Shared email coordination and accountability
✓Internal discussions alongside email threads
✓Colleague tagging and escalation workflows
✓Custom email rules
✓Customizable notifications across devices

Inbox Zero

Clean up your inbox in minutes. Open source.

4.8 · 14 reviews

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Subscription overload, rather than day-to-day email speed, is the problem Inbox Zero addresses most directly. It offers a focused alternative to Superhuman for people whose immediate priority is clearing accumulated mailing lists and promotional messages. Bulk unsubscribe tools help tackle the source of clutter instead of repeatedly processing the same unwanted senders.

Sender-level views bring related messages together without requiring repeated manual searches. That makes it easier to assess an old inbox and decide which subscriptions still deserve attention. The straightforward cleanup workflow is particularly appealing when a full email-client change would be unnecessary.

Inbox Zero’s open-source approach also distinguishes it for users who prefer that software model, although openness alone does not guarantee privacy or easy self-hosting. It is best understood as a focused decluttering option rather than a like-for-like replacement for Superhuman’s keyboard-driven email workspace.

Best for

Best for people overwhelmed by years of email subscriptions who want a straightforward, open-source cleanup tool.

Standout features

✓Bulk mailing-list unsubscribe tools
✓Sender-level message views
✓Focused inbox decluttering workflow
✓Open-source software

Slashy

The AI assistant that does email for you

5.0 · 6 reviews

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A unified inbox gives Slashy a clear advantage for people who find Superhuman’s separate-account workflow limiting. Bringing multiple accounts together helps professionals working across businesses or client identities manage email in one place. That makes account consolidation a substantive reason to switch, independent of its AI features.

Slashy also uses natural-language interaction for more than drafting replies. Users can create labels and automations, adjust prioritization, and ask contextual questions through its assistant. Personalized drafts and memory about frequent correspondents further suit people who want AI woven into their workflow rather than confined to occasional writing assistance.

Access through iMessage or Slack adds another distinction for professionals handling email between meetings. Mobile lag and bugs remain potential trade-offs, and platform availability matters for users who need consistent access everywhere. Slashy is therefore especially appealing when unified account management and conversational control outweigh the need for a more established mobile experience.