Warmup Inbox vs InboxWarm.ai

Warmup Inbox7.6Visit InboxWarm.ai7.6Visit

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

vs

InboxWarm.ai #5 in Email Warmup Software 7.6/10 From $15/mo · 10-day trial ✓ 3 of 3 features Visit InboxWarm.ai

• Warmup Inbox fits best

  Users wanting free warmup plus deliverability tools

• InboxWarm.ai fits best

  Growing teams managing many private warmup inboxes

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 ↗	InboxWarm.ai 7.6/10 Visit ↗
At a glance
Editor score	7.6	7.6
Ranking	#4 in Email Warmup Software	#5 in Email Warmup Software
Best for	Users wanting free warmup plus deliverability tools	Growing teams managing many private warmup inboxes
Pricing model	Free plan + paid	Paid
Starting price	Not published	Not published
Free plan	✓ (best)	—
Free trial	—	—
Free trial length	7 days · no card needed	10 days · no card needed
Deployment	Cloud	Cloud
Platforms	Web	Web
Support	Email, Live chat	Email, Docs · 24/7
Integrations	10 integrations	6 integrations
Built for	Solo, Small business, Mid-market, Enterprise	Small business, Mid-market, Enterprise
Features Warmup Inbox 0/3 · InboxWarm.ai 3/3
Custom warmup schedule	Not published	✓ (best)
Spam monitoring	Not published	✓ (best)
Multiple mailboxes	Not published	✓ (best)
Specs
Warmup network	Not published	Private
Daily email limit	Not published	100 /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	Private seed-inbox network with AI-generated replies and simulated engagement Supports Gmail, Outlook, SMTP/IMAP, SendGrid, Amazon SES, and Mailgun REST API plus inbox placement and SPF, DKIM, and DMARC monitoring
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	No free plan; the 10-day trial applies before paid billing The 1-mailbox plan allows up to 100 warmup emails per day Costs are charged per inbox, which can matter for larger mailbox counts
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 →	InboxWarm.ai is an email warmup and deliverability platform for startups, agencies, SaaS teams, and enterprises managing multiple sending inboxes. It automates warmup messages and engagement across a private seed-inbox network, while… Read the review →

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

• InboxWarm.ai — where it wins

  • Private seed-inbox network with AI-generated replies and simulated engagement
  • Supports Gmail, Outlook, SMTP/IMAP, SendGrid, Amazon SES, and Mailgun
  • REST API plus inbox placement and SPF, DKIM, and DMARC monitoring

  Where it doesn't

  • No free plan; the 10-day trial applies before paid billing
  • The 1-mailbox plan allows up to 100 warmup emails per day
  • Costs are charged per inbox, which can matter for larger mailbox counts

• 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 →
• InboxWarm.ai7.6/10 · From $15/mo · 10-day trial

  A focused warmup platform with private inbox networking, monitoring, and API access.

  Visit InboxWarm.aiFull verdict →