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Head-to-head · Email Warmup Software

Warmup Inbox vs MailStrike

  • Updated Sep 2026
  • Both researched from official sources
  • 4 checks side by side
Higher score Warmup Inbox #4 in Email Warmup Software 7.6/10 Free plan · paid from $15/mo (annual) · 7-day trial Free plan✓ 0 of 3 features Visit Warmup Inbox
MailStrike #6 in Email Warmup Software 7.5/10 From $18/mo (annual) ✓ 3 of 3 features Visit MailStrike

Warmup Inbox leads on 1 check, MailStrike on 3, and 0 are even. Who comes out ahead on the 4 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreWarmup Inbox · 7.6/10
  • Free planonly Warmup Inbox
  • Most featuresMailStrike · 3 of 3

Warmup Inbox scores higher on our rubric for email warmup software: 7.6 against 7.5 out of 10; our editors rank them #4 and #6.

Warmup Inbox offers free plan; MailStrike doesn't. MailStrike offers custom warmup schedule; Warmup Inbox doesn't publish it. MailStrike offers spam monitoring; Warmup Inbox doesn't publish it. MailStrike offers multiple mailboxes; Warmup Inbox doesn't publish it.

Warmup Inbox is the better fit for users wanting free warmup plus deliverability tools. MailStrike is the better fit for teams needing configurable shared-network warming.

  • Warmup Inbox fits best

    Users wanting free warmup plus deliverability tools

  • MailStrike fits best

    Teams needing configurable shared-network warming

Advertiser disclosure: iTechGuides is reader-supported. We may earn a commission when you click some links. It never changes our verdict. How we rank.

Side by side

Feature Warmup Inbox 7.6/10 Visit ↗ MailStrike 7.5/10 Visit ↗
At a glance
Editor score 7.6 7.5
Ranking #4 in Email Warmup Software #6 in Email Warmup Software
Best for Users wanting free warmup plus deliverability tools Teams needing configurable shared-network warming
Pricing model Free plan + paid Paid
Starting price Not published Not published
Free plan ✓ (best) —
Free trial — —
Deployment Cloud Cloud
Platforms Web Web
Support Email, Live chat Email
Compliance GDPR GDPR
Integrations 10 integrations 12 integrations
Built for Solo, Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features Warmup Inbox 0/3 · MailStrike 3/3
Custom warmup schedule Not published ✓ (best)
Spam monitoring Not published ✓ (best)
Multiple mailboxes Not published ✓ (best)
Specs
Warmup network Not published Shared
Daily email limit Not published 30 /day
Mailbox providers Not published Not published
Our review
Pros
  • Automated warmup through a network of real inboxes
  • Monitors inbox, spam, category placement, reputation, and blacklists
  • Supports major mailbox providers plus REST API access
  • AI personas create two-way warming conversations for each mailbox.
  • Placement tests show inbox, promotions, or spam results by provider.
  • SPF, DKIM, DMARC, MX checks, spam rescue, and maintenance warming are included.
Cons
  • Pricing is charged per inbox, which can increase with mailbox volume
  • Advanced warmup controls begin on the Pro plan
  • Max is required for premium support and unlimited developers API
  • There is no free plan.
  • Warming uses a shared network rather than an isolated mailbox network.
  • Solo supports one mailbox; larger mailbox counts require higher tiers.
Our verdict

Warmup Inbox is a web and API platform for sales, marketing, recruiting, and agency teams that send outbound email. It automates warmup through a network of real inboxes while tracking inbox, spam, and category placement. The product also…

Read the review →

MailStrike is an email deliverability platform for founders, cold-outreach teams, high-volume senders, and B2C marketers. It connects Google Workspace, Microsoft 365, or SMTP/IMAP mailboxes and warms them through AI-generated, two-way…

Read the review →
  1. Warmup InboxEmail Warmup Software 7.6Free plan · paid from $15/mo (annual) · 7-day trial
  2. MailStrikeEmail Warmup Software 7.5From $18/mo (annual)

Strengths and trade-offs

  • Warmup Inbox — where it wins

    • Automated warmup through a network of real inboxes
    • Monitors inbox, spam, category placement, reputation, and blacklists
    • Supports major mailbox providers plus REST API access

    Where it doesn't

    • Pricing is charged per inbox, which can increase with mailbox volume
    • Advanced warmup controls begin on the Pro plan
    • Max is required for premium support and unlimited developers API

  • MailStrike — where it wins

    • AI personas create two-way warming conversations for each mailbox.
    • Placement tests show inbox, promotions, or spam results by provider.
    • SPF, DKIM, DMARC, MX checks, spam rescue, and maintenance warming are included.

    Where it doesn't

    • There is no free plan.
    • Warming uses a shared network rather than an isolated mailbox network.
    • Solo supports one mailbox; larger mailbox counts require higher tiers.
  • Warmup Inbox7.6/10 · Free plan · paid from $15/mo (annual) · 7-day trial

    A broad warmup and monitoring toolkit with flexible mailbox connections and API access.

    Visit Warmup InboxFull verdict →
  • MailStrike7.5/10 · From $18/mo (annual)

    A configurable warmup platform with placement testing, analytics, and shared-network warming.

    Visit MailStrikeFull verdict →

More comparisons

All email warmup software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026

Last updated · How we research and update