Newton Mail vs Spark Mail

Newton Mail

• People who want the same mail app on Mac, Windows, iPhone and Android
• Knowing whether a sent email was opened, and by which recipient
• Small teams that share a thread or a support@ address

Spark Mail

• People juggling several email accounts across desktop and phone
• Individuals who want a free client with a unified inbox and send later
• Small teams that want to comment on emails and draft replies together

Newton Mail

• The Free plan is limited to 2 email accounts, 15 read receipts a month, 3 templates and 20 AI actions a day.
• Shared inboxes need the Team plan, which has a 2-seat minimum and is offered through a Request Access button.
• There is no webmail: the web portal is for account and settings management only.
• A Linux build is linked from the homepage, but the pricing page lists apps for Mac, Windows, iPhone and Android only.

Spark Mail

• The vendor lists apps for Mac, Windows, iOS and Android only; there is no web or Linux version.
• Gatekeeper, Priority, Spark +AI and third-party integrations require Plus or higher.
• Shared inboxes, read statuses and the HubSpot integration are limited to Pro and Enterprise.
• The free plan's AI is a limited preview: 5 meeting notes in total and 1 month of email history for the AI Assistant.

Newton Mail

Read receipts

Sent emails are tracked without any extra step, with per-recipient open tracking. The Free plan includes 15 read receipts a month and Pro makes them unlimited.

Snooze and send later

Snooze takes an email out of the inbox until a time you choose and syncs across devices. Send Later schedules a message to arrive at a set time.

Shared threads

Share a whole conversation with teammates, comment privately beside it and let authorized people reply from your address, with an activity log. Creating shared threads needs Pro.

Newton AI

The Today view triages the inbox by priority and Compose helps write emails. Usage is capped at 20 AI actions a day on the Free plan and 200 on Pro.

Connected apps and MCP server

Save an email to Todoist, Evernote, OneNote, Trello or Asana in one click, and use the MCP server to search, read, draft and schedule email from Claude and other AI assistants.

One inbox for Gmail, Outlook and IMAP

Works with Gmail and Google Workspace, Outlook and Microsoft 365, and IMAP accounts such as iCloud, Yahoo and Fastmail, with full-text search across every account at once.

Spark Mail

Smart Inbox and unified inbox

Brings every connected account into one inbox and separates priority mail from newsletters and notifications. Included in the free plan.

Gatekeeper and Priority

Gatekeeper lets you accept or block new senders before they land in the inbox, and Priority highlights chosen senders. Both are part of Plus and above.

Spark +AI and AI Assistant

+AI drafts, proofreads, summarizes and translates email. The AI Assistant answers questions about your mail, reaching back 1 month on Free, 1 year on Plus and without limit on Pro.

Snooze, Send Later and reminders

Snooze a message, set it aside, schedule a send or get a follow-up reminder. These scheduling tools are in the free plan.

Team collaboration

Share a thread with teammates, discuss it in private comments and write drafts together in real time. Shared inboxes for addresses such as support@ need Pro.

Calendar and AI meeting notes

A built-in calendar can add Zoom, GoTo or Microsoft Teams call links. AI meeting notes are capped at 5 in total on Free and 40 a month on Plus, and unlimited on Pro.

Newton Mail

• Free$0

  2 email accounts with a unified inbox, snooze, send later and signatures, 3 templates, 15 read receipts a month and 20 AI actions a day.

• Pro$5

  per month, billed annually ($6.99 billed monthly)

  Unlimited email accounts, read receipts and templates, 200 AI actions a day, the ability to create shared threads, and priority email support.

• Team$12

  per user / month, billed annually ($15 billed monthly)

  Everything in Pro for each seat, plus 3 shared inboxes per workspace, send-as delegation, shared team templates and admin controls. 2 seats minimum.

Spark Mail

• Free$0

  Unlimited accounts, Smart Inbox, unified inbox, snooze, send later, reminders, calendar and 5 lifetime AI meeting notes.

• Plus$8.25

  per user / month, billed annually ($99); $10 billed monthly

  Adds Gatekeeper, Priority, Spark +AI, the AI Assistant with 1 year of history, 40 AI meeting notes a month, integrations and team collaboration.

• Pro$16.58

  per user / month, billed annually ($199); $20 billed monthly

  Everything in Plus, plus shared inboxes, read statuses, unlimited AI meeting notes, HubSpot integration and Spark CLI triage access.

• EnterpriseCustom

  Everything in Pro, plus security and controls, a dedicated success manager and 1:1 productivity coaching.

Newton Mail

• Annual discount

  Save 28% on Pro with annual billing

  Pro is $5 a month billed annually against $6.99 billed monthly, which the pricing page labels a 28% saving. Team is $12 a user a month annually against $15 monthly.

Spark Mail

• Annual discount

  Save 17% with annual billing

  The pricing page shows Plus at $99 a year instead of $120 and Pro at $199 a year instead of $240 when billed annually, a 17% saving over paying monthly.