Warmy vs MailReach: Which Email Warmup Tool Fits Your Use Case

Pick MailReach if you send B2B cold email from a handful of Google Workspace or Microsoft 365 mailboxes and want simple per-mailbox pricing with placement tests included. Pick Warmy if you send to consumers, warm ESP or marketing platform sending, want warmup in your own templates and language, or run 20 or more mailboxes and Warmy confirms its plan volume is shared. Our Warmy review and MailReach review cover each tool in full.

Some tool links here are affiliate links (disclosure). Nerdy Joe is an affiliate of both Warmy and MailReach, so we earn whichever you choose, and we recommend by use case rather than by vendor. You can see Warmy's plans or see MailReach's plans as you read.

We did not test either tool hands-on. Every fact below comes from each vendor's own website, help center and terms, read in November 2026, with sources at the end.

Warmy vs MailReach: the quick verdict

Side by side

Pricing compared

Warmy's pricing page shows only "Plans starting from $49/ month". Its own comparison pages list five plans: Starter $49 (100 warmup emails a day), Business $129 (300), Premium $189 (1,000), Expert $279 (2,000) and Platinum $429 (5,000), as of November 2026. MailReach's blog lists $25 per mailbox for 1 to 5 mailboxes, $19.50 for 6 to 20 and $18 for 21 to 50, and its pricing page shows the $19.50 rate and 20% off on annual billing.

The catch is on Warmy's side. Its MailReach comparison says several mailboxes can share one plan's volume, while its lemwarm comparison says "$49 per mailbox, per month". We show both readings below as our arithmetic, not as fact.

The shared column follows Warmy's own assumption of 100 warmup emails a day per mailbox, so 5 mailboxes need 500 a day and land on Premium. Warmy's MailReach page draws the same conclusion: MailReach cheaper for 1 to 5 mailboxes, about even near 10, Warmy cheaper from about 20. That is Warmy's comparison, and it rests on the shared reading.

On annual billing MailReach drops to $20 for one mailbox and about $156 a month for 10. Warmy's terms mention annual fees billed in advance, but no annual price is published.

Full breakdowns are in our Warmy pricing and MailReach pricing guides. Before you buy Warmy, ask how many mailbox slots your plan includes.

Trials, billing and exits

• Warmy: a 7-day free trial with no card, limited by its terms to one mailbox and one user. Monthly fees are billed post-paid around the 1st for the prior period, all fees are non-refundable per the terms, and you cancel through support (chat, WhatsApp or email) at least five business days before renewal.
• MailReach: no free trial of the warmer is advertised, but the spam test is free for 3 tests per 24 hours. You are billed monthly in advance by card, a started month is not refunded, and you cancel by disconnecting your email accounts, effective the following month.

Warmup approach

Both tools run automated conversations between your mailbox and a network of inboxes that open, reply to and rescue the emails from spam. They differ on network, content and audience.

Network. Warmy says its network has more than 1 million mailboxes (its FAQ cites at least 300,000), mainly Warmy-managed with a smaller share of customer accounts, split into B2B and B2C networks. MailReach says it has 30,000+ inboxes, primarily Google Workspace and Microsoft 365. Neither publishes how members are screened, so treat both sizes as vendor claims.

Content. Warmy generates warmup content by industry, topic and language (30+ languages), and lets your own templates make up as much as 100% of warmup traffic. MailReach takes the opposite view: it does not offer template, industry or local-language warmup and argues these have no positive effect on reputation. These are each vendor's positions; we have no test data to settle it.

Providers. Both work with Google Workspace, Microsoft 365 and SMTP providers such as SendGrid, Mailgun, Amazon SES and Brevo. Warmy also lists connection guides for Mailchimp, Marketo, Yahoo, AOL, GMX and others, and positions itself for ESP and marketing platform sending. MailReach says it is not for B2C newsletters or ecommerce promos.

Volume and ramp. MailReach caps warmup at up to 100 emails a day per mailbox, and its Autopilot typically ramps to around 40 to 50 a day. Warmy's plans range from 100 to 5,000 warmup emails a day, with slow, medium and fast speeds, and Warmy recommends slow.

How long to warm. MailReach recommends at least 14 days of warmup before any campaign on a new mailbox or domain. Warmy's product page suggests about 3 to 4 weeks for a new domain and mailbox, and its help center says at least 2 months. Both say to keep warmup running after launch.

Placement testing

MailReach spam test. You send your real email to 30+ MailReach seed mailboxes at Google, Microsoft and Yahoo and get placement, content and authentication checks. The free tool scores out of 10, while the API returns a 0 to 100 score. Every warmup plan includes at least 20 credits, and 200 credits cost $210 a month.

Warmy deliverability test. The free version needs no sign-up and reports Inbox, Promotions, Spam and Unreceived by provider. In the app you choose B2C providers (Gmail, Outlook, Yahoo, Zoho) and B2B ones (Google Workspace, Microsoft 365, SMTP), and a test uses 15 credits in Warmy's example. Warmy also documents placement tests inside real campaigns, for up to 7 days, though not for Yahoo or custom SMTP.

Warmy seed list. This has no MailReach equivalent. Warmy's seed list is an engagement product: you add seed addresses to your real campaign, and the seeds open, click and move your email out of spam. That is still non-recipient engagement, and seed list prices are not published; ask when you compare Warmy's plans.

We cover test methods in more depth in our guide to running an inbox placement test.

Both scores measure warmup emails

MailReach's Reputation Score is based on where warming emails land, and MailReach says it is not an indicator that a mailbox is ready for campaigns. Warmy's deliverability score is likewise "based on warm-up emails". Neither score tells you how your real campaign lands, which is why the placement tests matter.

Extras beyond warmup

Warmy bundles more. Its comparison pages list email verification, DMARC monitoring, a Google Postmaster integration, API access and an agency dashboard in every plan. It also offers the Adeline AI assistant (automatic plan adjustments are "coming soon", per Warmy) and an MCP connection; our in-depth Warmy review covers each.

MailReach stays narrower: warmup, spam tests, free SPF and DKIM checkers, the Co-pilot assistant and an email verifier whose pricing and limits we could not find. If you already verify lists elsewhere, see our roundup of email verification tools.

Alerts, API and agency use

• Alerts. Warmy sends alerts by email, SMS, Slack or webhook, including blacklist alerts. MailReach sends Slack or webhook alerts on 11 documented events, such as score drops and disconnected accounts.
• API. Warmy documents a REST API with 60 requests a minute, but its API page also says to schedule a short call for access. MailReach says its API has no extra cost; numeric rate limits are not published.
• Agencies. Warmy offers free team members and up to 100 workspaces. MailReach offers an agency overview with tags and per-domain reputation. Neither advertises white label, and both sets of terms restrict reselling the service, so agencies should confirm terms with the vendor.

Google and warmup: what each vendor says

Google's sender guidelines recommend increasing volume slowly to engaged recipients and do not mention warmup tools. Gmail's program policies prohibit automating Gmail in ways that mislead or deceive users. In 2023, GMass said Google required it to shut down its API-based warmup.

MailReach says Google has not banned warmup and that it follows provider rules. Warmy says it operates independently of the Gmail API restrictions that GMass faced because it connects over IMAP, although its own help center says OAuth connections for Google Workspace and Microsoft 365 use the Gmail API or Microsoft Graph API. Both vendors' terms make customers responsible for following their email provider's policies.

Google has not published a position on warmup networks specifically, so treat automated warmup as a practice Google neither endorses nor explicitly names. Warmup engagement comes from network inboxes, not real prospects, and Google's spam-rate thresholds apply to real recipient complaints.

Ratings and each vendor's own comparison

Each vendor publishes a comparison page that favors itself. MailReach's "vs Warmy" page says Warmy needs a demo call before you start and has limited inbox testing, which conflicts with Warmy's current self-serve trial and placement tests in every plan.

Warmy's "vs MailReach" page says Warmy fits better from about 20 mailboxes or for B2C. Read both as marketing.

Which should you choose?

Choose MailReach if:

• You send B2B cold email from 1 to about 10 mailboxes.
• You want a clear per-mailbox price and easy month-to-month cancellation.
• You want placement test credits included and a free spam test to start.
• You agree with MailReach that template and language warmup are unnecessary.

Choose Warmy if:

• You send to consumers, or warm ESP and marketing platform sending.
• You want warmup content in your own templates, topics or language.
• You want seed list engagement, verification and DMARC monitoring in one subscription.
• You run 20 or more mailboxes and Warmy confirms in writing that plan volume is shared.

Consider neither if you only warm cold email mailboxes inside Instantly, Smartlead or PlusVibe, which include warmup for unlimited mailboxes in the sending plan. Our list of Warmy alternatives covers those options, and our guide to cold email infrastructure helps you count mailboxes first.

Ready to decide? Start Warmy's 7-day free trial, or run MailReach's free spam test on your real campaign.

Rather not build the list yourself?

Warmup keeps mailboxes healthy, but the list, the copy and the daily sending decide whether outbound books meetings.

Nerdy Joe is owned by Agency Growth Partners (AGP), and AGP builds verified lists and runs outbound for agencies. If you would rather hand that off, book a call with David.

Bottom line on Warmy vs MailReach

MailReach is the simpler, cheaper choice for small B2B cold email setups, with placement tests included and an easy exit. Warmy is broader: B2C and ESP warmup, custom warmup content, seed list engagement and more bundled tools, and it may cost less at 20 or more mailboxes if its volume is shared.

Settle the mailbox slot question with Warmy first, then read the full Warmy review and check Warmy's current plans.

Sources

• Warmy pricing
• Warmy vs MailReach (Warmy comparison page, updated November 2026)
• Warmy vs lemwarm (Warmy comparison page, updated November 2026)
• Warmy terms of service
• Warmy help: trial guide
• Warmy help: how to cancel your subscription
• Warmy FAQ
• Warmy email warm-up product page
• Warmy help: email sending process
• Warmy help: how long should I use Warmy
• Warmy help: template warm-up
• Warmy help: connection guide
• Warmy help: temperature settings
• Warmy help: inbox deliverability checker
• Warmy help: placement test on campaigns
• Warmy free email deliverability test
• Warmy seed list
• Warmy help: credits system
• Warmy help: notification hub
• Warmy API
• Warmy AI (Adeline)
• Warmy help: workspaces
• Warmy blog: GMass alternative (Warmy on Gmail API restrictions)
• G2: Warmy reviews
• Capterra: Warmy reviews
• Trustpilot: Warmy
• MailReach pricing
• MailReach blog: Warmup Inbox pricing (MailReach tier table)
• MailReach terms of use
• MailReach: how email warmup works
• MailReach email warmup
• MailReach email spam test
• MailReach API docs
• MailReach API docs: spam test
• MailReach for agencies
• MailReach for deliverability consultants
• MailReach help: getting started after connecting a mailbox
• MailReach vs Warmy (MailReach comparison page)
• MailReach blog: email warmup, in-house vs third-party services
• G2: MailReach reviews
• Capterra: MailReach reviews
• Trustpilot: MailReach
• Google: email sender guidelines
• Gmail program policies
• GMass: warmup shutting down