Superhuman vs Spark: which email client is right for you?

Last updated October 2026

Superhuman and Spark both promise to fix the way you handle email, but they approach the problem from different angles. Superhuman is built around raw speed and keyboard-driven workflows, targeting professionals who spend hours a day in their inbox and want to cut that time in half. Spark, developed by Readdle, leans into smart categorization and team collaboration, with a generous free tier that makes it accessible to anyone who wants a better inbox without a monthly bill.

This comparison breaks down how each client handles pricing, features, AI, collaboration, and platform support so you can decide which one fits your workflow.

At a glance

Superhuman pricing

Superhuman does not offer a free tier or a free trial. Every plan requires a paid subscription, and the client works on top of an existing Gmail or Outlook account, so you also need a Google Workspace or Microsoft 365 subscription.

The Starter plan costs $25 per user per month when billed annually, or $30 per user per month on a monthly basis. It includes Split Inbox, over 100 keyboard shortcuts, AI-powered writing, Auto Summarize, Snippets, a built-in calendar, Share Availability, and virtual conferencing integrations. Every paid plan comes with a 1-on-1 onboarding session, which is a nice touch for teams rolling out a new tool.

The Business plan runs $33 per user per month on an annual contract, or $40 per user per month billed monthly. It adds Auto Drafts, Ask AI (a natural-language search across your inbox and calendar), Custom Auto Labels, and CRM integrations with HubSpot, Salesforce, and Pipedrive. CRM integrations on this tier are read-only.

Enterprise pricing is custom and brings SOC 2 Type 2 compliance, SAML single sign-on, SCIM provisioning, BYOK encryption, data loss prevention, feature toggles, usage analytics, and a dedicated support team.

Superhuman also offers a Suite bundle that packages Superhuman Mail with Grammarly, Coda, and the Go launcher app. The Suite has its own pricing tiers, starting with a free plan that includes AI writing across Suite apps but does not include Superhuman Mail itself.

Spark pricing

Spark takes a different approach by offering a fully functional free tier. The free plan includes Smart Inbox, unlimited email accounts, Smart Notifications, essential productivity tools, and a built-in calendar. Free users also get a limited preview of Spark's AI Assistant, though they cannot purchase AI add-ons separately.

The Plus plan costs $8.25 per user per month when billed annually ($99 per year), or $10 per user per month on a monthly basis. It adds advanced email productivity features, the full Spark +AI suite, 40 AI Meeting Notes per month, essential team collaboration, custom templates, and productivity integrations.

The Pro plan costs $16.58 per user per month on an annual contract ($199 per year), or $20 per user per month billed monthly. Pro includes everything in Plus along with unlimited AI Meeting Notes, read statuses, advanced team collaboration, HubSpot integration, and Spark CLI with triage access.

Enterprise pricing requires contacting sales and adds advanced security controls, a dedicated success manager, and 1-on-1 productivity coaching.

Yearly plans across all tiers save roughly 17% compared to monthly billing.

Speed and keyboard shortcuts

Superhuman was designed around the idea that email should feel instant. The interface loads quickly, transitions are fluid, and every action can be triggered from the keyboard. The Cmd+K (Mac) or Ctrl+K (Windows) command palette opens a searchable list of every available action, and there are over 100 dedicated shortcuts for archiving, replying, snoozing, labeling, and navigating between messages. If you come from a Vim or terminal background, Superhuman will feel familiar.

Spark also supports keyboard shortcuts through its Command Center, though the experience is more conventional. Spark's strength is less about raw speed and more about reducing the number of emails you need to deal with in the first place. Smart Inbox automatically sorts messages into categories like Personal, Notifications, and Newsletters, so your attention goes to what matters first. Both clients are fast, but Superhuman is the one that markets speed as a core feature.

AI features

Both clients have invested heavily in AI, though they implement it differently.

Superhuman includes AI writing assistance on all paid plans. You can draft emails in your own voice and tone, and Auto Summarize generates a one-line summary above each conversation thread that updates as new messages arrive. On the Business plan, Ask AI lets you search your inbox and calendar with natural-language questions, and Auto Drafts prepares follow-up emails for you to review and send.

Spark's AI features (branded as Spark +AI) are available starting on the Plus plan. The suite includes AI Compose for drafting emails, a My Writing Style feature that learns how you write, Rephrase and Shorten tools for editing, translation, and email summarization. Spark also offers AI Meeting Notes, which are capped at 40 per month on Plus and unlimited on Pro. Spark has announced Autopilot and Auto-Drafts features as coming soon on the Pro tier.

If AI is central to your workflow, Superhuman gives you more on the entry-level paid plan, while Spark offers a broader set of AI editing tools at a lower price point once you move to Plus.

Inbox management

Superhuman's Split Inbox divides your email into customizable tabs. You might have tabs for your team, VIPs, newsletters, and tools, and you work through each split sequentially. The goal is to process email in batches rather than jumping between unrelated messages. Auto Labels on the Business plan use AI to tag incoming mail automatically.

Spark's Smart Inbox takes a more opinionated approach. It categorizes email for you into groups like People, Notifications, and Newsletters, and surfaces priority messages at the top. Gatekeeper lets you decide which new senders land in your inbox and which get redirected. You can pin important emails, mute threads, group messages by sender, and block unwanted contacts. Spark also bundles newsletters and notifications into collapsible sections so they do not clutter your main view.

Both approaches work well, but they suit different mindsets. Superhuman's splits give you control over the structure, while Spark's smart sorting does more of the thinking for you.

Team collaboration

Team features are where Spark has traditionally had an edge. Spark offers shared inboxes, real-time shared drafts, task assignments with status tracking, team comments on emails, and the ability to share individual threads with teammates. These features start on the Plus plan and expand on Pro. For small teams that need to manage a shared support or sales inbox, Spark's collaboration tools are robust without requiring a separate helpdesk product.

Superhuman's team features focus on visibility and communication within email threads. Team Comments let you annotate emails and @mention colleagues without forwarding or BCCing. Recent Opens shows a live feed of who has opened your emails, helping you time follow-ups. Shared live email views let teams look at the same message together. These are useful for sales teams and account managers, but they are less about managing a shared inbox and more about coordinating around individual conversations.

Email provider and platform support

Superhuman works exclusively with Gmail (personal and Google Workspace) and Outlook (Microsoft 365). It does not support other email providers. The client is available on Mac, Windows, iOS, and Android.

Spark supports a wider range of providers, including Gmail, Outlook, iCloud, Yahoo, and any provider that uses IMAP. It is available on Mac, Windows, iOS, Android, and Apple Watch. Spark also supports nine languages. If you use an email provider outside the Google and Microsoft ecosystems, Spark is the only option here.

Calendar and scheduling

Both clients include built-in calendars. Superhuman's calendar integrates with Google Calendar and Outlook Calendar, and the Share Availability feature lets you send open time slots to contacts without leaving the email client. Virtual conferencing integrations (Zoom, Google Meet, and others) are built in.

Spark's calendar is similarly integrated and works alongside the AI Meeting Notes feature on paid plans. Meeting Notes automatically generate summaries and action items from your calendar events, which can save time for people who attend a lot of meetings.

Privacy and security

Superhuman's Enterprise plan includes SOC 2 Type 2 compliance, GDPR compliance, SAML SSO, SCIM provisioning, BYOK encryption, and data loss prevention controls. Read statuses rely on tracking pixels, which means recipients who block external images will not trigger a read notification.

Spark states that user data is solely used for product optimization and is never shared with third parties. Storage and encryption run on Google Cloud infrastructure. Enterprise-tier customers get additional security controls, though Spark does not publicly list specific compliance certifications on its pricing page.

Who Superhuman is best for

Superhuman is designed for professionals and teams who live in their inbox and want to move through email as quickly as possible. If you value keyboard-driven workflows, read statuses for timing follow-ups, and CRM integrations for sales or account management, Superhuman delivers on those fronts. The 1-on-1 onboarding session helps new users adopt the shortcuts and workflow patterns that make the tool worthwhile. The lack of a free tier means you are committing to at least $25 per month before you try it, so it works best for people who already know they need a faster email experience.

Who Spark is best for

Spark is a strong choice for individuals and small teams who want a capable email client without a high starting cost. The free tier is functional enough for personal use, and the Plus plan at $8.25 per month delivers AI features and team collaboration that would cost significantly more on Superhuman. Spark's broader email provider support and cross-platform availability (including Apple Watch) make it more flexible. If you manage a shared inbox or need real-time collaboration on drafts, Spark's team features are more developed than Superhuman's at comparable price points.

Where Fabric fits

Both Superhuman and Spark improve how you read and respond to email, but neither helps you organize everything else. Your inbox is one slice of your digital life. Notes, bookmarks, documents, files, and content from dozens of other apps still live in separate silos.

Fabric is a personal cloud and context layer that connects over 30 apps, including Gmail, into a single searchable space. Instead of switching between tools to find what you need, Fabric brings everything together and makes it findable.

AI search lets you find anything across all your connected apps using natural language. The AI assistant works across your entire knowledge base, not just your inbox. Notes and docs give you a place to capture and develop ideas alongside the content you have already saved. And when you are ready to share, publishing turns any note or document into a shareable page.

Fabric offers a free tier with no credit card required. Paid plans start at $8 per month on an annual plan, or $10 per month billed monthly. Fabric also plants a tree for every user who signs up.

You can use Fabric alongside either Superhuman or Spark. Connect your Gmail account to Fabric, and your emails become part of your searchable knowledge base alongside everything else you save.

Related comparisons

If you are still deciding on the right email setup, these comparisons may help.

• Superhuman vs Gmail

• Superhuman vs Hey

• Fyxer vs Superhuman

• Superhuman vs Outlook

• Best email client for professionals

• Best AI email assistant

Frequently asked questions

Is Superhuman worth the price?

That depends on how much time you spend in email and how much that time is worth. Superhuman claims to save users four or more hours per week through keyboard shortcuts, Split Inbox, and AI features. For professionals billing at high hourly rates or managing large volumes of email, the $25 to $40 monthly cost can pay for itself quickly. For casual email users, the price is hard to justify when free or cheaper alternatives exist.

Does Spark have a free plan?

Yes. Spark's free tier includes Smart Inbox, unlimited email accounts, Smart Notifications, essential productivity tools, and a built-in calendar. You also get a limited preview of the AI Assistant. The free plan is functional enough for personal use, though team collaboration and full AI features require a paid subscription.

Can I use Superhuman with Yahoo or iCloud email?

No. Superhuman only supports Gmail (including Google Workspace) and Outlook (Microsoft 365). If you use Yahoo, iCloud, or another IMAP provider, Superhuman will not work for you. Spark supports all of these providers.

Which app has better AI features?

Both are strong, but they emphasize different things. Superhuman includes AI writing and Auto Summarize on its entry-level plan, with Ask AI and Auto Drafts on Business. Spark offers a wider range of AI editing tools (rephrase, shorten, translate) and AI Meeting Notes, but these require the Plus plan at minimum. Superhuman's AI is more tightly integrated into the speed-focused workflow, while Spark's AI covers more ground in content editing and meeting productivity.

Is Spark safe to use?

Spark states that user data is used solely for product optimization and is never shared with third parties. The service runs on Google Cloud with encryption. However, like any third-party email client, Spark requires access to your email account, which means trusting a third party with your messages. Review Spark's privacy policy and your organization's security requirements before connecting sensitive accounts.

Does Superhuman work on Linux?

Superhuman does not offer a native Linux client. It is available on Mac, Windows, iOS, and Android. Spark also lacks a native Linux app but shares the same platform coverage. Linux users may need to look at web-based alternatives or clients like Thunderbird.

Can I use Spark for team email management?

Yes, and this is one of Spark's strengths. The Plus plan includes essential team collaboration, and the Pro plan adds advanced collaboration features including shared inboxes, real-time shared drafts, task assignments with tracking, and team comments. For small teams managing shared email addresses (support, sales, info), Spark can replace a basic helpdesk tool.

Does Superhuman have read receipts?

Superhuman calls this feature "read statuses." It shows you when a recipient opens your email, and the Recent Opens feed gives you a live view of which emails were recently read. This is useful for timing follow-ups in sales or outreach. The feature relies on tracking pixels, so it will not register opens from recipients who block external images.

Which is cheaper for a team of five?

On annual billing, a team of five on Superhuman Starter would cost $125 per month ($25 per user). The same team on Spark Plus would cost $41.25 per month ($8.25 per user). Spark Pro for five users runs $82.90 per month ($16.58 per user). Even Spark's most expensive self-serve plan is cheaper than Superhuman's entry-level tier, and Spark's free plan costs nothing if you do not need AI or team features.

Is Fabric free?

Yes. Fabric offers a free tier with no credit card required. You can connect your apps, save content, and use AI search at no cost. Paid plans at $8 per month (annual) or $10 per month (monthly) unlock additional storage and features. Fabric works alongside any email client, adding a searchable knowledge layer on top of your inbox and 30 other connected apps.

Can I switch from Superhuman to Spark or vice versa?

Both clients sit on top of your existing email provider, so switching between them does not affect your actual email. Your messages, folders, and labels stay with Gmail or Outlook. You can try Spark's free plan while still using Superhuman to compare the experience side by side. The main adjustment will be learning a new set of shortcuts and adapting to a different inbox layout.

Do either of these apps work offline?

Superhuman offers offline support on its desktop and mobile apps, allowing you to read, search, and compose emails without an internet connection. Messages send automatically when you reconnect. Spark also supports offline access on its native apps, letting you read cached emails and draft replies while disconnected. Both handle offline use reasonably well for short periods.