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Head-to-head · AI Email Assistants

Spark +AI vs Superhuman Mail

  • Updated Oct 2026
  • Both researched from official sources
  • 7 checks side by side
Higher score Spark +AI #1 in AI Email Assistants 9.2/10 Free plan · 7-day trial Free planFree trial✓ 4 of 5 features Visit Spark
Superhuman Mail #7 in AI Email Assistants 8.2/10 Paid ✓ 0 of 5 features Visit Superhuman

Spark +AI leads on 2 checks, Superhuman Mail on 0, and 5 are even. Who comes out ahead on the 7 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreSpark +AI · 9.2/10
  • Lowest starting priceSpark +AI · $10/user/mo
  • Free planonly Spark +AI
  • Free trialonly Spark +AI
  • Most featuresSpark +AI · 4 of 5

Spark +AI scores higher on our rubric for ai email assistants: 9.2 against 8.2 out of 10; our editors rank them #1 and #7.

Spark +AI offers free plan; Superhuman Mail doesn't. Spark +AI is cheaper to start at $10/user/mo against $25/user/mo.

Spark +AI is the better fit for people who want AI help across everyday email tasks. Superhuman Mail is the better fit for teams seeking premium email productivity.

  • Spark +AI fits best

    People who want AI help across everyday email tasks

  • Superhuman Mail fits best

    Teams seeking premium email productivity

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature Spark +AI 9.2/10 Visit ↗ Superhuman Mail 8.2/10 Visit ↗
At a glance
Editor score 9.2 8.2
Ranking #1 in AI Email Assistants #7 in AI Email Assistants
Best for People who want AI help across everyday email tasks Teams seeking premium email productivity
Pricing model Free plan + paid Paid
Starting price $10/user/mo (best) $25/user/mo
Free plan ✓ (best) —
Free trial 7 days —
Deployment Desktop, Mobile Cloud, Desktop, Mobile, Browser extension
Platforms macOS, Windows, iOS, Android Web, Windows, macOS, iOS, Android, Chrome extension
Integrations 14 integrations 11 integrations
Features Spark +AI 4/5 · Superhuman Mail 0/5
Inbox triage ✓ (best) Not checked yet
AI reply drafting ✓ (best) Not checked yet
Automatic sending — Not checked yet
Thread summaries ✓ (best) Not checked yet
Follow-up actions ✓ (best) Not checked yet
Specs
Email platforms Other Not checked yet
Our review
Pros
  • Drafts, rewrites, proofreads, translates, and summarizes email
  • Searches email, attachments, calendar, and meeting notes
  • Available on macOS, Windows, iOS, and Android
  • AI drafting and inbox organization support faster email workflows
  • Split Inbox, reminders and scheduled sending aid follow-up triage
  • Calendar tools, offline access and team collaboration extend beyond email
Cons
  • The Free plan highlights do not include Spark +AI or AI Assistant
  • Plus includes 40 AI Meeting Notes; unlimited notes require Pro
  • Drafts need user review; automatic sending without approval is not supported
  • No free plan; Starter begins at $25 per member per month, billed annually
  • Business features such as Auto Drafts and Ask AI require the $33 tier
  • Works with Gmail or Microsoft 365-hosted accounts rather than a unified inbox
Our verdict

Spark +AI is the AI feature set within Readdle’s Spark email client, aimed at individuals and teams who want help with routine email work. It covers drafting and quick replies, proofreading, rewriting, tone adjustment, translation, and…

Read the review →

For individuals and teams working in Gmail or Microsoft 365, Superhuman Mail combines an email client with AI-assisted drafting, inbox organization, follow-up tools and calendar functions. Its Split Inbox is designed to help triage…

Read the review →
  1. Spark +AIAI Email Assistants 9.2Free plan · 7-day trial
  2. Superhuman MailAI Email Assistants 8.2Paid

Strengths and trade-offs

  • Spark +AI — where it wins

    • Drafts, rewrites, proofreads, translates, and summarizes email
    • Searches email, attachments, calendar, and meeting notes
    • Available on macOS, Windows, iOS, and Android

    Where it doesn't

    • The Free plan highlights do not include Spark +AI or AI Assistant
    • Plus includes 40 AI Meeting Notes; unlimited notes require Pro
    • Drafts need user review; automatic sending without approval is not supported

  • Superhuman Mail — where it wins

    • AI drafting and inbox organization support faster email workflows
    • Split Inbox, reminders and scheduled sending aid follow-up triage
    • Calendar tools, offline access and team collaboration extend beyond email

    Where it doesn't

    • No free plan; Starter begins at $25 per member per month, billed annually
    • Business features such as Auto Drafts and Ask AI require the $33 tier
    • Works with Gmail or Microsoft 365-hosted accounts rather than a unified inbox
  • Spark +AI9.2/10 · Free plan · 7-day trial

    A broad AI email toolkit across four platforms, with paid AI features starting at $10 per user monthly.

    Visit SparkFull verdict →
  • Superhuman Mail8.2/10 · Paid

    A premium Gmail and Outlook client with AI, scheduling and shared inbox workflows.

    Visit SuperhumanFull verdict →

More comparisons

All AI email assistants comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update