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Head-to-head · AI Email Assistants

Spark +AI vs Missive

  • 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
Missive #4 in AI Email Assistants 8.5/10 30-day trial Free trial✓ 0 of 5 features Visit Missive

Spark +AI leads on 2 checks, Missive 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 trialboth
  • Most featuresSpark +AI · 4 of 5

Spark +AI scores higher on our rubric for ai email assistants: 9.2 against 8.5 out of 10; our editors rank them #1 and #4.

Spark +AI offers free plan; Missive doesn't. Spark +AI is cheaper to start at $10/user/mo against $14/user/mo.

Spark +AI is the better fit for people who want AI help across everyday email tasks. Missive is the better fit for teams coordinating email and other shared communications.

  • Spark +AI fits best

    People who want AI help across everyday email tasks

  • Missive fits best

    Teams coordinating email and other shared communications

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 ↗ Missive 8.5/10 Visit ↗
At a glance
Editor score 9.2 8.5
Ranking #1 in AI Email Assistants #4 in AI Email Assistants
Best for People who want AI help across everyday email tasks Teams coordinating email and other shared communications
Pricing model Free plan + paid Paid
Starting price $10/user/mo (best) $14/user/mo
Free plan ✓ (best) —
Free trial 7 days 30 days
Free trial length 7 days 30 days · no card needed
Deployment Desktop, Mobile Cloud, Desktop, Mobile
Platforms macOS, Windows, iOS, Android Web, Windows, macOS, iOS, Android
Integrations 14 integrations 16 integrations
Features Spark +AI 4/5 · Missive 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
  • Shared inboxes add assignments, comments, mentions, and collaborative drafting.
  • Rules, automations, scheduled sending, and follow-ups support repeatable workflows.
  • AI tools, calendar features, integrations, and API access extend email work.
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
  • There is no ongoing free plan after the 30-day trial.
  • Integrations, automations, analytics, and API access start with Productive.
  • SAML and SSO, IP restriction, and advanced reporting require Business.
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 →

Missive brings team and personal inboxes together with email, SMS, and social accounts, giving support, sales, agency, and other business teams a shared place to coordinate communication. Teammates can assign conversations, add internal…

Read the review →
  1. Spark +AIAI Email Assistants 9.2Free plan · 7-day trial
  2. MissiveAI Email Assistants 8.530-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

  • Missive — where it wins

    • Shared inboxes add assignments, comments, mentions, and collaborative drafting.
    • Rules, automations, scheduled sending, and follow-ups support repeatable workflows.
    • AI tools, calendar features, integrations, and API access extend email work.

    Where it doesn't

    • There is no ongoing free plan after the 30-day trial.
    • Integrations, automations, analytics, and API access start with Productive.
    • SAML and SSO, IP restriction, and advanced reporting require Business.
  • 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 →
  • Missive8.5/10 · 30-day trial

    Missive combines shared inbox workflows with AI tools, starting at $14 per user monthly when billed annually.

    Visit MissiveFull 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