Comparison
Warmy vs Warmup Inbox 2026: Who Publishes Real Prices?
October 12, 2026 · 5 min read
Warmy starts near $9/mo but gates pricing behind signup. Warmup Inbox lists flat per-mailbox rates up front. Full 2026 pricing and feature breakdown.
The sending setup
Warmy is an AI-driven warmup platform that scores inbox health and writes its own warmup threads, but its pricing page hides mailbox caps until you sign up. Warmup Inbox skips the AI layer and publishes flat per-mailbox rates in the open. For a team warming up 10+ domains, that disclosure gap changes how fast you can actually budget either tool.
By Rishabh Ambasta, Founder, Modern Inbound.
At a glance
- Most transparent pricing: Warmup Inbox, flat per-mailbox tiers listed on its public pricing page, no signup wall.
- Best AI-driven warmup content: Warmy, generates varied reply threads and scores inbox health automatically.
- Cheapest entry tier: Warmy, around $9 to $10/mo for a handful of mailboxes, per Warmy's pricing page.
- Honest reframe: Neither tool replaces a managed warmup process; both just automate sending fake back-and-forth email.
Warmy vs Warmup Inbox: pricing side-by-side
Warmy's lowest tier runs about $9 to $10/mo per Warmy's pricing page, but the page doesn't show how many warmup emails that includes until you click into checkout. Warmup Inbox publishes a flat per-mailbox rate on its pricing page with the sending volume listed in the same breath. If you're comparing on price alone, Warmup Inbox wins on disclosure even when the sticker price lands close to Warmy's.
| Comparison axis | Warmy | Warmup Inbox |
|---|---|---|
| Pricing transparency | Tiers listed, mailbox caps hidden until signup | Flat per-mailbox rate shown on the pricing page |
| Starting price | Around $9 to $10/mo, per Warmy's pricing page | Around $10 to $15/mo per mailbox, per Warmup Inbox's pricing page |
| Free trial | Short free trial, no card required | Trial gated behind a signup form |
| AI-generated warmup content | Yes, writes varied reply threads automatically | Template-based, less variation |
| ESP-specific warmup | Tunes sending patterns per ESP (Gmail, Outlook) | One warmup pattern across ESPs |
| API access | Available on paid tiers | Limited or absent on lower tiers |
| Google Postmaster integration | Built-in reputation pull | Not natively integrated |
Who actually tells you the price before signup?
Warmup Inbox is the only one of the two that shows real numbers without an account. Warmy requires an email signup before the checkout page reveals mailbox limits and overage pricing, which is a friction point for anyone comparing five tools in one afternoon.
We run deliverability setups for clients at Modern Inbound and this is the exact pattern that slows down procurement. A buyer bounces between four warmup tool tabs, three show pricing instantly, one makes them sign up first. The one that gates pricing loses the comparison shopper every time, regardless of whether its actual plan is cheaper.
Feature breakdown: AI content, ESP tuning, and API access
Warmy's AI-generated warmup threads are the meaningful technical edge here. It varies subject lines, reply timing, and thread length automatically, which looks more like real human email traffic to Gmail and Outlook's spam filters than a templated back-and-forth.
Warmup Inbox skips that layer entirely. It runs a simpler warmup pattern that works fine for a handful of mailboxes but doesn't adapt per ESP the way Warmy claims to, per Warmy's product page. If you're warming up 20+ domains ahead of a cold outbound push, that ESP-specific tuning matters more than the price gap.
Warmy pros and cons
- Pro: AI-generated warmup threads look less templated to spam filters.
- Pro: Google Postmaster integration pulls reputation data into one dashboard.
- Pro: Cheapest entry tier of the two, around $9 to $10/mo.
- Con: Pricing page hides mailbox caps and overage fees until you sign up, which is the exact complaint this comparison exists to flag.
Warmup Inbox pros and cons
- Pro: Flat per-mailbox pricing is visible without creating an account.
- Pro: Simple enough that a non-technical founder can set it up in an afternoon.
- Con: No AI-generated content, so warmup emails look more templated over time.
- Con: No native Google Postmaster pull, so you're checking reputation somewhere else anyway.
Who should actually choose which tool?
Choose Warmup Inbox if you're a solo founder or small agency warming up fewer than 10 mailboxes and want to see the exact bill before you commit a card. Choose Warmy if you're running 20+ domains and the AI-varied warmup content is worth paying a little more to find out whether it actually holds reputation better over 90 days.
Neither tool replaces a managed deliverability process. Both just automate the fake back-and-forth that keeps a mailbox warm; neither handles domain setup, DNS records, or the actual cold outbound campaign sitting behind the warmup. If you'd rather not run that stack yourself, Modern Inbound's Setup service handles domains, 20 mailboxes, 14-day warmup, and verified sending as one execution layer, so you're not stitching together a warmup tool, a DNS guide, and a sending platform on your own.
Too Busy to Run Outbound Yourself?
Modern Inbound handles research, infrastructure, warm-up, account lists, copy tests, sending, replies, and routing. The team has delivered 6,000+ warm leads.
FAQ
Is Warmy or Warmup Inbox cheaper in 2026?
Warmy's entry tier runs about $9 to $10/mo, slightly below Warmup Inbox's per-mailbox rate of roughly $10 to $15, per each tool's pricing page. The gap narrows fast once you add mailboxes, since Warmup Inbox bills flat per seat.
Which tool publishes pricing without requiring signup?
Warmup Inbox lists its per-mailbox rate directly on its pricing page. Warmy requires an email signup before checkout reveals mailbox caps and overage fees.
Does Warmy or Warmup Inbox use AI to generate warmup emails?
Warmy generates varied warmup threads automatically using AI, adjusting subject lines and reply timing. Warmup Inbox uses a more templated approach without that variation layer.
Can I use Warmy or Warmup Inbox with Google Postmaster Tools?
Warmy has a built-in Google Postmaster integration that pulls reputation data into its dashboard. Warmup Inbox doesn't natively integrate, so you'd check Postmaster Tools separately.
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We build and run outreach inside your business for 90 days, then it stays yours. Tell us your offer and your market and we tell you if it fits.
Rishabh AmbastaFounder, Modern Inbound
Runs a research-led cold email agency measured in delivered replies. Before that, outbound for SaaS teams from $1M to $50M ARR. LinkedIn
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