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Spark

Cross-platform email app from Readdle with a smart inbox, AI writing and shared team inboxes.

Free plan + paidEmail clients
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About Spark

Spark is an email client from Readdle that sorts incoming mail into personal messages, notifications and newsletters, and lets you snooze, pin, schedule and set follow-up reminders. Its Gatekeeper feature screens first-time senders, and the built-in AI assistant can summarise threads and draft replies. Teams can share threads, comment privately on emails and write messages together. It works with Gmail, Outlook, iCloud, Yahoo and any IMAP account. A free plan covers individuals with unlimited accounts and the core inbox features; paid Plus and Pro plans, billed per user, add the full AI features, meeting notes, larger team tools and admin controls. Spark runs on Mac, Windows, iPhone, iPad and Android. Because it syncs through Readdle's servers to provide push notifications and team features, people with strict privacy requirements may prefer a client that connects directly to the mail server. Some users also find that the newer AI-heavy layout adds clutter.

Best for: People and small teams who want one smart inbox across all their devices.

Pros and cons

What works

  • Free plan with unlimited accounts and a smart inbox
  • Shared threads, private comments and joint drafting for teams
  • Native apps on Mac, Windows, iOS and Android

Why people leave

  • Mail syncs through Readdle's servers
  • Best AI and team features need a per-user subscription
  • No web app

Top Spark alternatives

See all 6
  1. 1Canary Mail logo
    Canary Mail

    Similar cross-platform client with PGP encryption and lower paid tiers.

    66.5
  2. 2Superhuman Mail logo
    Superhuman Mail

    A premium, keyboard-first inbox for heavy email users on Gmail or Outlook.

    62.6
  3. 3Missive logo
    Missive

    Goes further on team collaboration, with shared inboxes, assignments and SMS.

    59.6
  4. 4Airmail logo
    Airmail

    An Apple-only client with more customisation and no per-user team pricing.

    57.2
  5. 5Ed
    Edison Mail

    A free multi-account client with fast unsubscribe and sender blocking.

    55.3

Why people left Spark

In reviewers' own words, from reviews of the apps they moved to. These are their opinions, not ours.

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Reviews

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Spark: common questions

Is Spark free?

Spark has a free plan and paid plans. Free plan: Yes, unlimited email accounts (checked on Spark's own site).

Is Spark open source?

No, Spark is not open source.

What platforms does Spark run on?

Spark is available for macOS, Windows, iOS and Android.

What are the best alternatives to Spark?

The highest-ranked Spark alternatives right now are Canary Mail, Superhuman Mail and Missive. See the full ranked list for pricing, platforms and verified facts.

See all 6 Spark alternatives