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Head-to-head · AI Email Assistants

Superhuman Go vs Mailbutler Smart Assistant

  • Updated Oct 2026
  • Both researched from official sources
  • 6 checks side by side
Higher score Superhuman Go #2 in AI Email Assistants 8.8/10 Free plan Free plan✓ 0 of 5 features Visit Superhuman
Mailbutler Smart Assistant #3 in AI Email Assistants 8.6/10 Free plan · 14-day trial Free planFree trial✓ 4 of 5 features Visit Mailbutler

Superhuman Go leads on 0 checks, Mailbutler Smart Assistant on 0, and 6 are even. Who comes out ahead on the 6 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreSuperhuman Go · 8.8/10
  • Free planboth
  • Free trialonly Mailbutler Smart Assistant
  • Most featuresMailbutler Smart Assistant · 4 of 5

Superhuman Go scores higher on our rubric for ai email assistants: 8.8 against 8.6 out of 10; our editors rank them #2 and #3.

Superhuman Go is the better fit for free cross-app assistance and automations. Mailbutler Smart Assistant is the better fit for affordable email productivity across major platforms.

  • Superhuman Go fits best

    Free cross-app assistance and automations

  • Mailbutler Smart Assistant fits best

    Affordable email productivity across major platforms

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Side by side

Feature Superhuman Go 8.8/10 Visit ↗ Mailbutler Smart Assistant 8.6/10 Visit ↗
At a glance
Editor score 8.8 8.6
Ranking #2 in AI Email Assistants #3 in AI Email Assistants
Best for Free cross-app assistance and automations Affordable email productivity across major platforms
Pricing model Free plan + paid Free plan + paid
Starting price — $7/user/mo
Free plan ✓ ✓
Free trial — 14 days
Deployment Cloud, Desktop, Mobile, Browser extension Cloud, Desktop, Mobile, Browser extension
Platforms Web, Windows, macOS, iOS, Android, Chrome extension Web, Windows, macOS, Linux, iOS, Android, Chrome extension
Integrations 14 integrations 5 integrations
Features Superhuman Go 0/5 · Mailbutler Smart Assistant 4/5
Inbox triage Not checked yet ✓ (best)
AI reply drafting Not checked yet ✓ (best)
Automatic sending Not checked yet —
Thread summaries Not checked yet ✓ (best)
Follow-up actions Not checked yet ✓ (best)
Specs
Email platforms Not checked yet Not checked yet
Our review
Pros
  • Free plan includes synced conversations across desktop, mobile, and browser
  • Pro adds email drafting, inbox organization, app connectors, and custom agents
  • Works across web, desktop, mobile, and Chrome extension
  • Drafts keyword-based messages and context-aware replies
  • Summarizes email and identifies actionable tasks
  • Works with Apple Mail, Gmail, and Microsoft Outlook
Cons
  • Email Assistant and personal app connectors require Pro
  • Team connectors and Superhuman Mail access require Business
  • Enterprise pricing is custom
  • Smart Assistant requires Smart or Business after the 14-day trial
  • Starter emails carry a visible Mailbutler watermark
  • No automatic email sending
Our verdict

Superhuman Go is an AI assistant and agent platform for individuals and teams who want contextual help across websites, desktop apps, browser extensions, and mobile devices. It can refine writing, summarize content, prepare meeting…

Read the review →

Mailbutler Smart Assistant adds AI drafting, replies, summaries, and task detection to an email productivity toolkit. It is aimed at people who want help composing and organizing email across Apple Mail, Gmail, or Microsoft Outlook,…

Read the review →
  1. Superhuman GoAI Email Assistants 8.8Free plan
  2. Mailbutler Smart AssistantAI Email Assistants 8.6Free plan · 14-day trial

Strengths and trade-offs

  • Superhuman Go — where it wins

    • Free plan includes synced conversations across desktop, mobile, and browser
    • Pro adds email drafting, inbox organization, app connectors, and custom agents
    • Works across web, desktop, mobile, and Chrome extension

    Where it doesn't

    • Email Assistant and personal app connectors require Pro
    • Team connectors and Superhuman Mail access require Business
    • Enterprise pricing is custom

  • Mailbutler Smart Assistant — where it wins

    • Drafts keyword-based messages and context-aware replies
    • Summarizes email and identifies actionable tasks
    • Works with Apple Mail, Gmail, and Microsoft Outlook

    Where it doesn't

    • Smart Assistant requires Smart or Business after the 14-day trial
    • Starter emails carry a visible Mailbutler watermark
    • No automatic email sending

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