Superhuman

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

4.8•88 reviews•

4K followers

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

4.8•88 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, Missive, Spark, LIAM, and Inbox Zero.

Shortwave

4.7 ·

Choose Shortwave if...

✓you want GTD-style bundles for faster triage
✓you rely on Gmail and want smarter organization
✓you need AI summaries inside long threads

See details ↓

Missive

4.6 ·

Choose Missive if...

✓you need shared inboxes with team assignments
✓you want internal chat alongside email threads
✓you need rules and escalations for accountability

See details ↓

Spark

4.1 ·

Choose Spark if...

✓you manage many accounts across multiple devices
✓you want gatekeeper controls for new senders
✓you prefer lower-cost sorting over premium speed

See details ↓

LIAM

Choose LIAM if...

✓you want AI drafting inside Gmail without switching
✓you need scheduling help with human approval
✓you can’t install a new email client

See details ↓

Inbox Zero

4.8 ·

Choose Inbox Zero if...

✓you need bulk unsubscribe and clutter cleanup
✓you want sender-based review to clear fast
✓you prefer open-source options for more control

See details ↓

What to Consider

Superhuman is the benchmark for premium, speed-first email—built around keyboard-driven triage, fast search, and a streamlined “get through your inbox” feel. The alternatives landscape is less about raw speed and more about which philosophy you want: Shortwave leans into GTD-style processing with bundles and lightweight AI summaries, Missive optimizes for teams with shared inboxes and internal collaboration, and Spark focuses on multi-account convenience plus sender “gatekeeping” and automated sorting. On the other end of the spectrum, LIAM adds AI drafting/triage inside Gmail without switching clients, while Inbox Zero targets bulk cleanup and unsubscribing with an open-source, clutter-reduction mindset.

In evaluating these options, we weighed workflow fit (solo vs team, processing style, and organization depth), integration constraints (especially Gmail/Google Workspace), and the tradeoffs between switching to a new client versus augmenting an existing inbox. We also considered cross-platform reliability and performance, the practicality and trustworthiness of AI features, collaboration and accountability needs, and overall pricing/value—including privacy and control for those who prefer open-source or minimal vendor lock-in.

Shortwave

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

4.7 · 23 reviews

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Bundles are the heart of Shortwave, making it a compelling alternative to Superhuman when the goal is structured, repeatable inbox processing rather than pure speed. Instead of treating every message as a one-off decision, Shortwave groups related emails so entire categories can be handled together, deferred, or reviewed at a set cadence.

That GTD-style flow is especially strong for Gmail and Google Workspace users who want more “big picture” clarity while still moving quickly. Once bundles are tuned, it becomes easier to scan what matters, postpone lower-priority categories, and keep the inbox from re-filling with noisy threads.

Shortwave also differentiates with AI that shows up as practical in-context affordances, like summaries embedded directly in threads. This is ideal for long emails where the priority is comprehension and triage, not necessarily generating lots of new copy.

If Superhuman feels like it optimizes for rapid action but not deeper organization, Shortwave is the pick for people who want a processing system that continuously reduces cognitive load.

Best for

Best for Gmail users who want a GTD-style workflow with bundles and quick AI summaries.

Standout features

✓Bundles for batched triage
✓GTD-style processing workflow
✓In-thread AI summaries
✓Strong search and thread handling
✓Fast keyboard-driven navigation

Missive

Email, Chat and Tasks for Productive Teams

4.6 · 11 reviews

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Missive is built for teams that need email to behave like an operations hub, not a personal productivity sport. Compared with Superhuman’s individual speed focus, Missive prioritizes shared inbox workflows where ownership, context, and accountability matter as much as response time.

Collaboration is the standout: internal chat, comments, and @mentions live right alongside customer or partner threads, so teams can coordinate without messy CC chains or forwarding. That makes it easier to keep external communication crisp while still discussing decisions internally.

On the control side, Missive’s rules, assignments, and escalation paths help teams avoid dropped balls as volume grows. It’s a better fit than Superhuman when multiple people need to see the same conversation, route it correctly, and track who’s responsible.

For solo users, the customization and organization tools can still be valuable, but Missive shines most when email is a shared system of record for support, ops, or sales.

Best for

Ideal for support, ops, and sales teams running shared inboxes with clear ownership.

Standout features

✓Shared inboxes and assignments
✓Internal chat and thread comments
✓Custom rules and escalations
✓Team accountability workflows
✓Cross-platform apps

Spark

All in one email solution.

4.1 · 70 reviews

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Multi-account convenience is where Spark pulls ahead, especially for people juggling several personal and work inboxes across devices. Rather than competing with Superhuman’s premium “fastest inbox” positioning, Spark leans into practical daily management: quick setup, unified access, and automated organization.

Spark’s sorting helps tame volume by splitting newsletters, notifications, and priority messages into distinct streams. That “pre-organized inbox” approach can feel more immediately helpful than a speed-first client when the main problem is noise, not throughput.

Another differentiator is gatekeeper-style sender control, which adds a layer of protection against unwanted senders before they become routine distractions. Combined with cross-device syncing, it’s a strong option for people who live on mobile and hop between platforms.

If the appeal of Superhuman is polished productivity at a premium price, Spark is often chosen for broader coverage and inbox hygiene features that make everyday mail more manageable.

Best for

Best for people managing many email accounts who want automatic sorting and sender control.

Standout features

✓Unified multi-account inbox
✓Cross-device sync and setup
✓Smart sorting for newsletters and notifications
✓Gatekeeper approve or block new senders
✓AI summarization and writing assistance

LIAM

Email drafts in your voice + inbox organising + scheduling

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LIAM takes a different angle by improving email and scheduling from inside Gmail rather than asking users to adopt a new client. That makes it a strong alternative to Superhuman for teams with IT constraints, entrenched Gmail habits, or anyone who wants AI assistance without changing their entire inbox workflow.

Its core value is hands-on help with triage, drafting, and meeting coordination while keeping a human in control. The “never send without approval” model is designed for people who want the leverage of automation but still need confidence and oversight on every outbound message.

Because LIAM works where email already happens, onboarding is typically lighter than switching to a new app with a new shortcut system. For users who mostly like Gmail but want faster replies, better follow-through, and easier scheduling, that trade-off can beat a premium client experience.

If Superhuman is about optimizing the interface, LIAM is about adding an assistant layer that reduces the time spent composing and coordinating without disrupting existing routines.

Best for

Ideal for Google Workspace users who want AI help inside Gmail without switching clients.

Standout features

✓Works inside Gmail
✓AI drafting in your voice
✓Scheduling assistance
✓Human approval before sending
✓Triage and follow-up support

Inbox Zero

Clean up your inbox in minutes. Open source.

4.8 · 14 reviews

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Inbox Zero is the pragmatic alternative when the real pain is years of accumulated clutter, not the need for a faster email client. Instead of competing with Superhuman’s day-to-day speed benefits, it focuses on big wins like bulk cleanup, subscription management, and rapid decluttering.

The unsubscribe workflow is central: it helps identify recurring senders, review them in batches, and remove yourself from lists that quietly compound over time. Grouping emails by sender also makes it easier to evaluate what’s worth keeping versus what can be archived or deleted at scale.

Its open-source posture appeals to people who want more control over how tools interact with their inbox, and it fits well as a “reset button” before adopting any long-term email workflow. Even for Superhuman users, it can be a complementary step to reduce noise first.

When the priority is reclaiming a clean baseline quickly, Inbox Zero offers a more direct path than switching clients and hoping new habits solve old backlog.