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Head-to-head · AI Email Assistants

Spark +AI vs Superhuman Go

  • Updated Oct 2026
  • Both researched from official sources
  • 6 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 Go #2 in AI Email Assistants 8.8/10 Free plan Free plan✓ 0 of 5 features Visit Superhuman

Spark +AI leads on 0 checks, Superhuman Go 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 scoreSpark +AI · 9.2/10
  • Free planboth
  • Free trialonly Spark +AI
  • Most featuresSpark +AI · 4 of 5

Spark +AI scores higher on our rubric for ai email assistants: 9.2 against 8.8 out of 10; our editors rank them #1 and #2.

Spark +AI is the better fit for people who want AI help across everyday email tasks. Superhuman Go is the better fit for free cross-app assistance and automations.

  • Spark +AI fits best

    People who want AI help across everyday email tasks

  • Superhuman Go fits best

    Free cross-app assistance and automations

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 Go 8.8/10 Visit ↗
At a glance
Editor score 9.2 8.8
Ranking #1 in AI Email Assistants #2 in AI Email Assistants
Best for People who want AI help across everyday email tasks Free cross-app assistance and automations
Pricing model Free plan + paid Free plan + paid
Starting price $10/user/mo —
Free plan ✓ ✓
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 14 integrations
Features Spark +AI 4/5 · Superhuman Go 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
  • 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
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
  • Email Assistant and personal app connectors require Pro
  • Team connectors and Superhuman Mail access require Business
  • Enterprise pricing is custom
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 →

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 →
  1. Spark +AIAI Email Assistants 9.2Free plan · 7-day trial
  2. Superhuman GoAI Email Assistants 8.8Free plan

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 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
  • 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 Go8.8/10 · Free plan

    A cross-platform AI assistant with email help, connected apps, and custom automations.

    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