Warmy vs Mailreach 2026: Which Email Warmup Tool Is Worth the Money?
Warmy and Mailreach are both paid email warmup tools. We compare network size, features, pricing, and when you should skip both entirely.
Two Paid Warmup Tools, One Question: Are Either Worth It?
Email warmup tools solve a real problem. New inboxes have no sending reputation. Send cold email from a fresh account and a big chunk of it lands in spam. Warmup tools fix that by sending emails between a network of real accounts, generating positive engagement signals (opens, replies, "not spam" actions) that build reputation before your campaigns go live.
Instantly and Smartlead both include warmup free with every plan. So the real question when comparing Warmy and Mailreach is not just which one is better. It is whether you need a dedicated warmup tool at all, given that the most popular cold email platforms include it for nothing.
What Warmy Does
Warmy (warmy.io) is one of the more fully featured standalone warmup tools on the market. The core product warms your inboxes through a network of 500,000+ real email accounts. Those accounts send to each other, open each other's emails, move things from spam to inbox, and reply, creating the engagement signals that email providers use to judge sender reputation.
Beyond warmup, Warmy includes a spam placement test (similar to GlockApps) that shows you where a test email lands across major providers, blacklist monitoring across 100+ lists, DNS health checks for SPF/DKIM/DMARC, and AI-generated warmup email content so the warmup emails do not look templated.
Warmy pricing:
- Free: 1 inbox, up to 50 warmup emails per day
- Starter: $49/month, 5 inboxes
- Business: $99/month, 15 inboxes
- Expert: $199/month, unlimited inboxes
Warmy works with Google Workspace, Outlook 365, and custom SMTP providers.
What Mailreach Does
Mailreach (mailreach.co) takes a cleaner, more focused approach. The product warms inboxes and provides spam score monitoring. No built-in spam testing tool. No blacklist monitoring dashboard. Just warmup and health reporting.
The network is smaller than Warmy's. Mailreach operates across roughly 10,000 to 15,000 accounts. This is not necessarily a problem — warmup network size matters less than network quality, meaning real active accounts with authentic engagement patterns. But a 50x difference in network size does translate to different reputation-building speed, especially for Outlook inboxes which need more signals.
Mailreach pricing:
- 1 mailbox: $25/month
- 5 mailboxes: $79/month ($15.80 per mailbox)
- 10 mailboxes: $139/month ($13.90 per mailbox)
- 25 mailboxes: $299/month ($11.96 per mailbox)
Mailreach integrates with Google Workspace, Outlook 365, and SMTP.
Direct Comparison
| Feature | Warmy | Mailreach |
|---|---|---|
| Warmup network size | 500,000+ accounts | ~10,000-15,000 accounts |
| Spam placement test | Yes (built-in) | No (separate tool needed) |
| Blacklist monitoring | Yes (100+ lists) | No |
| DNS health checks | Yes | Basic |
| AI warmup content | Yes | No |
| Google Workspace support | Yes | Yes |
| Outlook 365 support | Yes | Yes |
| Custom SMTP support | Yes | Yes |
| Price (5 inboxes) | $49/month | $79/month |
| Price (15 inboxes) | $99/month | $209/month (est.) |
| Free plan | Yes (1 inbox) | No |
Warmup Speed: Does Network Size Matter?
In practice, both tools deliver Google Workspace inboxes to 80%+ inbox placement within 14 to 18 days. The gap in warmup speed is real but small, roughly 2 to 3 days faster with Warmy's larger network. That difference matters at scale, not for individual inbox testing.
Where the network size difference shows up more clearly is Outlook 365. Microsoft is slower to trust new accounts than Google, and Outlook inboxes benefit more from a larger, more diverse warmup network. Teams running heavy Outlook infrastructure have reported faster reputation building with Warmy versus Mailreach.
The Option Nobody Talks About: Free Warmup on Your Sending Platform
If you are using Instantly or Smartlead, you already have email warmup included at no extra cost. Instantly's warmup network is 1 million+ accounts — double Warmy's and roughly 70x Mailreach's. Warmup runs in the background automatically alongside your campaigns.
Smartlead's built-in warmup runs a similar network. Neither charges extra for it. So if you are already paying for Instantly at $37 to $97 per month, adding Warmy at $49 to $199 per month on top is paying twice for a feature you already own.
The only time a standalone tool makes sense is when you send cold email through a platform that does not include warmup, like Woodpecker or some SMTP setups, or when you need the additional diagnostic features (Warmy's spam placement test and blacklist monitoring) that go beyond what your sending platform offers.
The Third Option: Skip Warmup Entirely
There is a fourth path that most warmup tool comparisons ignore. Buy pre-warmed inboxes.
Providers like Puzzle Inbox deliver Google Workspace and Outlook 365 inboxes that have already completed 14+ days of warmup before delivery. You connect them to your sending platform and start campaigns within 24 to 48 hours. No warmup tool needed. No warmup wait. No warmup cost.
The math: Warmy Business plan at $99/month for 15 inboxes, running for 3 months of warmup, costs $297. That money covers 85 pre-warmed Outlook inboxes from Puzzle Inbox at $0.35 each, or 66 pre-warmed Google Workspace inboxes at $4.50 each. You get more inboxes, zero wait time, and the warmup cost becomes one purchase rather than an ongoing monthly subscription.
When to Choose Warmy Over Mailreach
Warmy is the better tool if you are paying for a standalone warmup tool at all. The larger network, the built-in spam testing, and the blacklist monitoring give you materially more value for a lower price than Mailreach, especially at 5 to 15 inboxes. Mailreach is more expensive per mailbox and provides fewer features. The only scenario where Mailreach edges out Warmy is if you want simplicity and already have a separate tool for spam testing and blacklist monitoring.
Warmy vs Mailreach: what cold email operators actually need to compare
Most "Warmy vs Mailreach" comparisons online compare feature checkboxes. Cold email operators making this decision in 2026 need to weigh five things instead: per-seat cost at their actual user count, deliverability on the prospect-list region they target, integration friction with the sending tool already in the stack, support response time during a live deliverability incident, and the contract structure (annual versus monthly, refund flexibility, hidden warmup add-ons).
Pricing comparison: Warmy vs Mailreach
Headline pricing is the first thing most buyers see, but real total cost of ownership depends on what is bundled and what is an add-on. For Warmy and Mailreach, the dimensions to model carefully are: per-seat cost on the smallest viable plan, the price step from the entry tier to the next tier (where most growth-stage teams end up), credits or sending limits that bottleneck heavy users, warmup tool subscriptions sold separately, deliverability monitoring add-ons, and any minimum-order constraints that inflate the entry point. Pull current pricing directly from the vendor pricing pages; both vendors update tiers quarterly in 2026.
Deliverability and sending infrastructure
For tools in the cold email infrastructure category, the upstream question is which underlying mailbox provider the sending traffic actually leaves from. Real Google Workspace and Microsoft 365 mailboxes inherit Google's and Microsoft's own IP reputation. Custom SMTP infrastructure does not. India-region Workspace tenants carry different region-level reputation signals from US or EU region tenants. If Warmy and Mailreach differ on this dimension, that single difference outweighs most of the feature comparison. For sending tools and lead data tools, the upstream question is whether the product gracefully connects via OAuth to real GWS / M365 mailboxes from a provider like Puzzle Inbox.
Integration friction with the existing stack
Most operators do not pick Warmy or Mailreach in isolation. The decision is shaped by what the rest of the stack already runs on. If the team is on Smartlead or Instantly for sending, the integration story is more important than any standalone feature comparison. If the team is on Apollo or Clay for data, the export and webhook compatibility matters more than the prospect database size. The right comparison framework is: "Which one breaks least when bolted onto our existing stack?" not "Which one has more features on a vendor demo deck?"
Support and incident response
Both Warmy and Mailreach have public support channels. The dimension that separates them is response time during a live incident — a deliverability drop mid-campaign, a sudden bounce-rate spike, an account suspension. Test this before signing by opening a real support ticket on a free trial or paid plan. The vendor that responds in hours instead of days is the one that survives contact with a real cold email operation.
Where Puzzle Inbox fits
Whichever of Warmy or Mailreach the team picks, the sending infrastructure layer is upstream of the tool decision. Puzzle Inbox provisions real Google Workspace and Microsoft 365 cold email mailboxes on dedicated tenants, ships pre-warmed inventory in 24 to 72 hours, and connects via OAuth (email + password) to every sending tool in this comparison. See the pricing page, Google Workspace plans, or Outlook 365 plans for current per-inbox numbers. Reviews follow our published editorial methodology.
Warmy vs Mailreach FAQ
Which is cheaper, Warmy or Mailreach?
The cheaper of Warmy and Mailreach at your specific seat count depends on the tier each vendor places you on. Pull current pricing from both vendor pricing pages on the same day and run the math at your actual user count, your actual sending volume, and your actual feature requirements. The cheaper headline number is often not the cheaper effective cost once add-ons and seat tiers are factored in.
Which has better deliverability, Warmy or Mailreach?
Deliverability is mostly a function of the sending mailbox provider (Google Workspace, Microsoft 365, or custom SMTP) rather than the tool layered on top. If Warmy and Mailreach both connect to real GWS or M365 mailboxes, the deliverability difference is small. If one of them is custom SMTP infrastructure and the other is real GWS / M365, the gap is large.
Can I switch between Warmy and Mailreach later?
Both vendors export contact data, campaign history, and reply data in standard formats. Migration friction is mostly in re-onboarding the team on the new UI rather than data portability. Budget a week for the switch.
What is a good alternative to Warmy and Mailreach?
The alternatives most cold email operators evaluate alongside Warmy and Mailreach live in the same category. See the tools directory for the full category list and the comparisons directory for related head-to-heads.
Related Reading
- Best Cold Email Inbox Providers in 2026: 10 Services Compared — We ranked and compared the 10 best cold email inbox providers on pre-warming, DNS quality, platform diversity, pricing, and support speed.
- The 8 Best Email Verification Tools for Cold Email in 2026 — The 8 best email verification tools ranked by accuracy, price, and speed. ZeroBounce, NeverBounce, MillionVerifier, and more compared.
- Best B2B Data Providers for Cold Email in 2026 (Ranked by Value) — The 8 best B2B data providers for cold email in 2026. Apollo, ZoomInfo, Cognism, Clay, and more ranked by value, accuracy, and use case.
- Cold Email Infrastructure Checklist: Everything You Need Before Sending Your First Email — The complete cold email infrastructure checklist for 2026. 15 items to verify before your first send so you don't burn domains or land in spam.
- The Complete Cold Email Tools Stack for 2026: What You Actually Need — What cold email tools you actually need in 2026. Essentials, nice-to-haves, and what you can skip. Infrastructure, sending, data, and verification.
Ready to start sending?
Puzzle Inbox provisions pre-warmed Google Workspace and Outlook 365 cold email inboxes ready to send within 24-72 hours. See the pricing page, the how-it-works walkthrough, or the our-process page for full details. Comparisons follow our editorial methodology.