The average professional spends 28% of their workday on email. Two hours gone before anything real happens. Most AI email assistants promise to fix this, and most do not. Finding the right AI email assistant means figuring out which of these tools actually saves time and which one just adds another subscription to your stack.
Superhuman changed its pricing. Here is what that means
Superhuman was acquired by Grammarly in July 2025, and by October 2025 the pricing had been restructured around a unified suite that bundles Grammarly’s writing tools and Coda’s collaborative documents. This matters because the old Starter plan at $30 per month no longer exists for new users. Superhuman Mail, the actual email client with keyboard shortcuts, split inbox, and AI drafting, is now only available on the Business plan at $33 per member per month billed annually, or $40 month-to-month. The Free and Pro plans exist but do not include email access at all. They give you AI chat, Grammarly features, and Coda docs.
For anyone comparing prices across review articles published before October 2025, those articles are wrong. The $24.99 or $30 Starter plan they reference is gone. New subscribers pay $33 per month minimum to get Superhuman email, and that bundle includes Grammarly Pro and Coda whether you use them or not.
What Superhuman actually does well
The keyboard-first interface remains the core product. J and K navigate between messages, E archives, R replies, and Cmd+K opens a command palette. After two days the shortcuts become automatic. After five days, going back to regular Gmail feels like switching from a mechanical keyboard to a tablet keyboard. The split inbox automatically separates VIP contacts, team threads, newsletters, and receipts into different lanes. Power users processing 100 or more emails daily report saving 20 to 40 minutes per day.
AI drafting analyzes your sent emails to learn your tone and vocabulary. Type one sentence and Superhuman expands it into a full response. About 35 to 40% of drafts are accepted without edits based on aggregated reviewer data. Auto Drafts generate suggestions while you are looking at the email. Per-contact voice matching learns your phrasing patterns for specific correspondents over time, so the draft for your CFO sounds different from the draft for a cold sales intro.
Instant Search returns results in under 100 milliseconds, significantly faster than native Gmail search on large mailboxes. Read receipts show when and where recipients opened your message. Follow-up reminders surface emails that have not received a reply. CRM integrations with HubSpot, Salesforce, and Pipedrive are included.
The catch
At $33 per month, Superhuman targets a narrow group: professionals who spend two or more hours daily on email and whose time value justifies the cost. Below that threshold the math does not work. Gmail and Outlook only, no IMAP or custom providers. Mobile app is functional but noticeably slower than desktop. There is no free trial. You need an onboarding call before getting access, which is unusual for a software product in 2026.
Shortwave: The smartest Gmail upgrade
Shortwave was built by former Google engineers and works exclusively with Gmail. Five pricing tiers: free with basic AI features, Business at $24 per user per month billed annually ($30 monthly), Premier at $36 per user per month annually ($45 monthly), Max at $100 per user per month for executives needing maximum AI capacity, and Enterprise for organizations with 50 plus seats.
Business gets 150 to 300 daily AI requests, 5-year search history, instant AI replies, and personalized AI writing. Premier doubles the AI capacity and unlocks unlimited search history. Max offers six times the Business tier’s AI capacity with the most powerful AI models.
AI bundles change how you think about email
Instead of a chronological inbox, Shortwave groups related emails intelligently. Shipping notifications cluster together. LinkedIn alerts form their own bundle. A package delay from the same shipping provider sits separately from their promotional newsletter, even though both come from the same address. The grouping understands context, not just sender. This is the feature that Shortwave users cite most often as the reason they switched from Gmail.
The search advantage
AI Search is Shortwave’s strongest capability. Type “find the email about the Q3 budget from Sarah last month” and it finds the exact message, not approximately, precisely. Gmail’s native search requires exact phrases, date filters, and label combinations. Shortwave understands intent. Multiple reviewers report saving 15 to 20 minutes across test periods when searching for old conversations that Gmail could not locate.
The AI Assistant sidebar, introduced in 2026, acts as a conversational interface for your inbox. Select any email or thread and ask it to summarize, draft a reply in a specific tone, extract action items, or explain technical content. For complex multi-party email chains, Shortwave’s drafting quality often exceeds Superhuman’s because it pulls context from the entire thread.
Shortwave vs Superhuman
These two are the strongest AI email assistant options for Gmail power users, but they optimize for different things. Superhuman optimizes for speed. The keyboard-driven interface and split inbox minimize time per email. If you process 80 to 100 emails daily, Superhuman wins. Shortwave optimizes for understanding your inbox. The AI Bundles and natural language search help you find and comprehend, not just process. If you frequently need to locate old emails or understand long threads, Shortwave wins.
Pricing favors Shortwave. Business at $24 per month is cheaper than Superhuman’s $33 per month minimum. The free tier makes evaluation risk-free. But Superhuman’s keyboard workflow creates a compounding speed advantage at high volumes that Shortwave cannot match.
Spark: The multi-account budget option
Spark’s 2026 pricing has three paid tiers. Free includes smart inbox, unlimited email accounts, and basic productivity features. Plus at $99 per year ($8.25 per month) adds Spark Plus AI with extended monthly credits, AI Assistant with 1 year of history, 40 AI meeting notes per month, and custom templates. Pro at $199 per year ($16.58 per month) unlocks unlimited AI meeting notes, full email history, auto-drafts, auto-labels, HubSpot integration, and advanced team collaboration with read statuses and shared inboxes.
As an AI email assistant, As an AI email assistant, Spark does not have the best AI in this comparison. Superhuman and Shortwave both produce better drafts and more accurate search results. What makes Spark worth considering is that it supports Gmail, Outlook, Exchange, iCloud, Yahoo, and IMAP accounts in one unified inbox. For freelancers or consultants juggling three or more email addresses across different providers, it is the only option here that handles that without workarounds.
Mobile apps are the best in this comparison. For teams looking to build automated workflows beyond just email, the automation landscape has expanded with options like Zapier alternatives and custom pipeline builders. Spark’s team collaboration features, shared inboxes with AI-powered assignment suggestions, collaborative draft editing, and collision detection, make it the practical choice for small teams sharing a common inbox. AI processing happens on-device where possible, using anonymized server-side data otherwise. For regulated industries handling sensitive client communications, this privacy-first approach matters.
Gmail’s built-in AI
Google keeps adding AI features to Gmail. “Help me write” generates full drafts from short descriptions. Thread summaries appear above long conversations. Natural language search is improving but inconsistent compared to Shortwave. And if you already use Claude for writing tasks, its drafting capabilities rival some dedicated email assistants. If you spend under an hour daily on email and use Gmail, the built-in features are sufficient. Paying $33 per month to optimize a 45-minute daily problem makes no sense.
Match the tool to your volume
Under 30 emails per day on Gmail: Stick with Gmail’s built-in AI. Free, improving, and enough for light use. Graduate to Shortwave when searching for old emails starts taking more time than writing new ones.
30 to 80 emails per day on Gmail: Shortwave Business at $24 per month. The AI Bundles and Search save the most measurable time at this volume. Start with the free tier to see if bundle-based organization fits your workflow.
50 or more emails per day, Gmail or Outlook, and time value above $50 per hour: Superhuman Business at $33 per month. The split inbox and keyboard speed create compounding gains at high volume. At $33 per month saving 45 minutes daily, the cost per hour recovered is roughly $1.10. That is a strong return if your time is worth $50 or more per hour.
Multiple email providers: Spark Plus at $99 per year. It is the only option here that unifies three or more providers in one inbox. Do not overbuy an AI email assistant for volume you do not have, and do not use free tools when email is costing you two hours of productive time every single day.
