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Head-to-head · AI Email Assistants

Spark +AI vs MailMaestro

  • 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
MailMaestro #5 in AI Email Assistants 8.4/10 Free plan · 14-day trial Free planFree trial✓ 4 of 5 features Visit MailMaestro

Spark +AI leads on 1 check, MailMaestro on 0, and 6 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 planboth
  • Free trialboth

Spark +AI scores higher on our rubric for ai email assistants: 9.2 against 8.4 out of 10; our editors rank them #1 and #5.

Spark +AI is cheaper to start at $10/user/mo against $12/user/mo.

Spark +AI is the better fit for people who want AI help across everyday email tasks. MailMaestro is the better fit for outlook and Gmail users wanting focused AI help.

  • Spark +AI fits best

    People who want AI help across everyday email tasks

  • MailMaestro fits best

    Outlook and Gmail users wanting focused AI help

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 ↗ MailMaestro 8.4/10 Visit ↗
At a glance
Editor score 9.2 8.4
Ranking #1 in AI Email Assistants #5 in AI Email Assistants
Best for People who want AI help across everyday email tasks Outlook and Gmail users wanting focused AI help
Pricing model Free plan + paid Free plan + paid
Starting price $10/user/mo (best) $12/seat/mo
Free plan ✓ ✓
Free trial 7 days 14 days
Free trial length 7 days 14 days
Deployment Desktop, Mobile Cloud, Browser extension
Platforms macOS, Windows, iOS, Android Web, Chrome extension
Integrations 14 integrations 5 integrations
Features Spark +AI 4/5 · MailMaestro 4/5
Inbox triage ✓ ✓
AI reply drafting ✓ ✓
Automatic sending — —
Thread summaries ✓ ✓
Follow-up actions ✓ ✓
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
  • Drafts and improves messages using conversation context and tone controls
  • Summarizes email threads and attachments, with reminders and inbox triage
  • Connects with Outlook, Gmail, and their calendars for meeting responses
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
  • Free plan limits compose, reply, and improve requests to three per week
  • Auto-send is not included
  • Enterprise features include custom integrations and data retention
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 →

MailMaestro is an AI email assistant for professionals who want help composing, refining, and replying to messages, as well as organizing an inbox. It works with Microsoft Outlook and offers Gmail through a Chrome extension. Drafts can use…

Read the review →
  1. Spark +AIAI Email Assistants 9.2Free plan · 7-day trial
  2. MailMaestroAI Email Assistants 8.4Free plan · 14-day trial

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

  • MailMaestro — where it wins

    • Drafts and improves messages using conversation context and tone controls
    • Summarizes email threads and attachments, with reminders and inbox triage
    • Connects with Outlook, Gmail, and their calendars for meeting responses

    Where it doesn't

    • Free plan limits compose, reply, and improve requests to three per week
    • Auto-send is not included
    • Enterprise features include custom integrations and data retention
  • 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 →
  • MailMaestro8.4/10 · Free plan · 14-day trial

    Draft, refine, summarize, and organize email with AI across Outlook and Gmail.

    Visit MailMaestroFull 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