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Head-to-head · Email Clients

Newton Mail vs Spike

  • Updated Oct 2026
  • Both researched from official sources
  • 7 checks side by side
Higher score Newton Mail #16 in Email Clients 7.8/10 Free plan · 14-day trial Free planFree trial✓ 4 of 4 features Visit Newton Mail
Spike #18 in Email Clients 7.6/10 Free plan Free plan✓ 3 of 4 features Visit Spike

Newton Mail leads on 0 checks, Spike on 2, 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 scoreNewton Mail · 7.8/10
  • Lowest starting priceSpike · $4/user/mo
  • Free planboth
  • Free trialonly Newton Mail
  • Most featuresNewton Mail · 4 of 4

Newton Mail scores higher on our rubric for email clients: 7.8 against 7.6 out of 10; our editors rank them #16 and #18.

Spike is cheaper to start at $4/user/mo against $5/user/mo. Spike leads on account limit: 3 accounts versus 2 accounts.

Newton Mail is the better fit for users wanting an affordable all-platform client. Spike is the better fit for conversational email and team collaboration.

  • Newton Mail fits best

    Users wanting an affordable all-platform client

  • Spike fits best

    Conversational email and team collaboration

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 Newton Mail 7.8/10 Visit ↗ Spike 7.6/10 Visit ↗
At a glance
Editor score 7.8 7.6
Ranking #16 in Email Clients #18 in Email Clients
Best for Users wanting an affordable all-platform client Conversational email and team collaboration
Pricing model Free plan + paid Free plan + paid
Starting price $5/user/mo $4/user/mo (best)
Free plan ✓ ✓
Free trial 14 days —
Deployment Cloud, Desktop, Mobile Cloud, Desktop, Mobile
Platforms Web, Windows, macOS, Linux, iOS, Android Web, Windows, macOS, iOS, Android
Support Email, Community, Docs Email, Live chat, Docs
Integrations 14 integrations 12 integrations
Built for Solo, Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features Newton Mail 4/4 · Spike 3/4
Unified inbox ✓ ✓
Offline access ✓ (best) Not checked yet
Scheduled sending ✓ ✓
Calendar tools ✓ ✓
Specs
App coverage All All
Account limit 2 accounts 3 accounts (best)
Our review
Pros
  • Works across web, Windows, macOS, Linux, iOS, and Android
  • Unified inbox, offline access, rules, search, and scheduled sending
  • Supports Gmail, Outlook, IMAP, iCloud, Yahoo, and more
  • Unified inbox supports Gmail, Outlook, Yahoo, iCloud, Hotmail, and IMAP
  • AI summaries, generation, scheduled sending, and priority sorting
  • Calendar, tasks, notes, calls, and shared inboxes in one app
Cons
  • The Free plan supports only two email accounts
  • Unlimited accounts require a paid Pro or Team plan
  • Shared inboxes and admin controls are limited to Team
  • Free supports one email address, 60 days of search, and 1 GB storage
  • Pro supports unified inboxes for up to three email addresses
  • Unlimited email addresses require the $12 Ultimate plan
Our verdict

Newton Mail is an email client for individuals and teams managing multiple Gmail, Google Workspace, Outlook, Microsoft 365, and IMAP accounts. It brings those accounts into a unified inbox across web, Windows, macOS, Linux, iOS, and…

Read the review →

Spike is an email client for individuals, professionals, and teams that want email and collaboration features in one workspace. It turns traditional email threads into chat-like conversations and connects Gmail, Outlook, Yahoo, iCloud,…

Read the review →
  1. Newton MailEmail Clients 7.8Free plan · 14-day trial
  2. SpikeEmail Clients 7.6Free plan

Strengths and trade-offs

  • Newton Mail — where it wins

    • Works across web, Windows, macOS, Linux, iOS, and Android
    • Unified inbox, offline access, rules, search, and scheduled sending
    • Supports Gmail, Outlook, IMAP, iCloud, Yahoo, and more

    Where it doesn't

    • The Free plan supports only two email accounts
    • Unlimited accounts require a paid Pro or Team plan
    • Shared inboxes and admin controls are limited to Team

  • Spike — where it wins

    • Unified inbox supports Gmail, Outlook, Yahoo, iCloud, Hotmail, and IMAP
    • AI summaries, generation, scheduled sending, and priority sorting
    • Calendar, tasks, notes, calls, and shared inboxes in one app

    Where it doesn't

    • Free supports one email address, 60 days of search, and 1 GB storage
    • Pro supports unified inboxes for up to three email addresses
    • Unlimited email addresses require the $12 Ultimate plan

All email clients comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update