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Side-by-side comparisonBy the Warmy deliverability team Updated 8 min read
Mailmend facts checked against its own website, October 2026
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Mailmend is a Gmail Primary-tab tool for ecommerce brands on Klaviyo. It adds custom code to your email templates to move campaigns out of the Promotions tab and then measures the lift with A/B tests inside Klaviyo. Pricing is custom on annual plans and there's a 30-day free trial.
Warmy is a full email deliverability platform from $49/month. It has warm-up on a 1M+ mailbox network and a 500,000+ US seed list and placement tests that show how many emails land in the inbox and Promotions and spam at each provider and also DMARC and reputation monitoring. If your only issue is Gmail's Promotions tab in Klaviyo Mailmend targets exactly that. If emails land in spam or you send cold or B2B email or you need to see placement beyond Gmail Warmy covers more.
KEY TAKEAWAYS
Warmy: Keep email out of spam and prove placement at every provider
Mailmend: Move Gmail campaigns from Promotions to Primary
Warmy: Any sender: ecommerce, B2B, cold email, agencies
Mailmend: Ecommerce brands and publishers on Klaviyo
Warmy: Warms up mailboxes and domains on 1M+ real mailboxes
Mailmend: Not listed
Warmy: Inbox, Promotions and spam by provider, including Gmail
Mailmend: Placement check on its own rotating test inboxes, then A/B tests in Klaviyo
Warmy: DMARC, blacklists, domain and IP reputation
Mailmend: Performance dashboard; no DMARC or reputation monitoring listed
Warmy: Five published plans, $49–$429/month, billed monthly
Mailmend: Custom pricing on annual plans; book a demo
Warmy: 7 days, no credit card
Mailmend: 30 days; starts after your first A/B test
Mailmend solves one problem well and that's Gmail's Promotions tab. When you compare Mailmend with Warmy line by line the difference is scope. Warmy tracks inbox and spam and Promotions across providers and works on the reputation behind them.
| Criterion | Warmy | Mailmend |
|---|---|---|
| Positioning | All-in-one, self-serve email deliverability platform | Gmail Primary-tab placement for ecommerce brands and publishers |
| Email warm-upKey difference | 1M+ real, protected Google Workspace, Microsoft 365 and B2C mailboxes | Not listed |
| Seed listKey difference | 500,000+ real US seed accounts, desktop and mobile; rotated monthly; engage with your real campaigns | Not listed |
| Inbox placement testing | Included: 5–50 tests/month by plan; inbox, Promotions and spam by provider, including Gmail | Placement check on a rotating set of test inboxes, used to tune its Gmail code |
| Measuring campaign lift | Placement tests before and after a change | A/B tests inside Klaviyo |
| Reputation monitoringKey difference | Domain/IP reputation tracking, blacklist alerts, spam-placement reports | Not listed |
| Authentication toolsKey difference | SPF, DKIM and DMARC tracking, record checks and DMARC report analysis | Not listed |
| Gmail tab placement | Shows how many emails land in Promotions | Core feature: custom drag-and-drop code in Klaviyo templates |
| Works with | Any ESP, CRM or mailbox, including Klaviyo | Klaviyo (flows and campaigns) |
| Support and setup | Self-serve in minutes via OAuth or SMTP/IMAP; 24/7 human support | Done-for-you setup; dedicated account manager, email and Slack support |
| PricingKey difference | From $49/month, billed monthly | Custom pricing on annual plans; book a demo |
| Free trial | Seven days, no credit card required | 30 days; starts after the first A/B test |
Mailmend details come from its public website and pricing page and were checked October 2026 (see sources). Mailmend is a trademark of its respective owner.
No Credit Card Required | Cancel Anytime
If your only problem is Gmail's Promotions tab and you send through Klaviyo Mailmend is built for that one job. If emails land in spam or you're comparing tools to prevent emails from landing in the Promotions tab and also want to see the rest of the picture Warmy fits.
To fix emails going to spam
Warm-up, monitoring and expert help.
To see placement at every provider
Inbox, Promotions and spam for Gmail, Outlook, Yahoo and more.
Transparent monthly pricing
Published plans from $49/month.
Cold email and B2B sending
Warmy works with any mailbox or sending tool.
Authentication and reputation checks
DMARC, blacklists, domain and IP reputation.
A Gmail Primary-tab fix inside Klaviyo
Custom code with done-for-you setup.
Campaign lift reported inside Klaviyo
A/B tests with and without the code.
See where your campaigns land folder by folder. Run a free deliverability test or start a 7-day free trial.
Warmy publishes five plans. Mailmend doesn't publish pricing and you book a demo.
| Pricing detail | Warmy | Mailmend |
|---|---|---|
| Starting price | $49 / month | Quote (not published) |
| Billing | Monthly | Not published |
| Plans |
|
|
| Placement tests | Included in every plan | A/B tests in your email platform |
| Also included | Google Postmaster integration, API access, custom warmup settings, agency dashboard, Deliverability Academy, private community. 7-day free trial, no credit card. | Revenue guarantee claimed on its site |
Prices in USD are from each vendor's public pricing page and were checked October 2026. Prices can change so confirm on the vendor's site before buying.
Trusted by 35,000+ happy businesses like marketers and entrepreneurs and affiliates.
“Warmy has been a game changer for us. The platform pays for itself many times over.”
“If you do cold email, Warmy will increase your efficiency, improve your deliverability, and cut your costs.”
Thomas Tzouridis“I've purchased many marketing tools before. Often, once you buy, you're on your own. With Warmy, they care about you.”
These get mixed up all the time and they need different fixes. The Promotions tab is a category inside the Gmail inbox. The email was delivered and Gmail filed it as promotional. Recipients can move messages between tabs and some use Gmail without tabs at all.
The spam folder is different. It means a filter decided the message was unwanted and that's usually because of sender reputation or authentication or complaints or content.
Before you buy a fix find out which one you're dealing with. A placement test that shows inbox and Promotions and spam side by side answers that in a few minutes.
| Problem | What it means | What to check | Tool that helps |
|---|---|---|---|
| Emails landing in the Promotions tab | Delivered to the inbox; Gmail categorized the message as promotional | Message type and layout, what subscribers expect, how much of your list uses Gmail | Warmy placement test (Promotions by provider); Mailmend for Klaviyo’s Gmail Primary tab |
| Emails land in spam | A filter marked the message as unwanted | Sender reputation, complaints, list quality, content triggers | Warmy warm-up, reputation tracking, Template Checker |
| SPF, DKIM or DMARC fail | Mailbox providers can’t verify the sender | DNS records and every service that sends as your domain | Warmy DMARC monitoring; free SPF and DMARC generators |
| Domain or IP on a blocklist | Some providers may reject or filter your mail | Which list, which domain or IP, and since when | Warmy blacklist alerts; free Blacklist Checker |
| Reputation is dropping | Providers trust your mail less, so filtering gets stricter | Spam rate in Google Postmaster Tools, complaint and bounce trends | Warmy reputation tracker with Google Postmaster integration |
Gmail also expects bulk senders to authenticate with SPF and DKIM and DMARC and offer one-click unsubscribe and keep spam complaints low. If you're fighting the Promotions tab check these first because they affect every folder and not just Primary. For a deeper look at how to avoid the Gmail Promotions tab see our guide on why emails land there.
Warmy email warmup runs through your existing provider on a protected network of over a million real Google Workspace and Microsoft 365 and consumer inboxes. It ramps up gradually during working hours and simulates natural engagement like opens and replies and marking emails as important and rescuing them from spam.
Warmy adds a 500,000+ US seed list across Gmail and Outlook and Yahoo and corporate and regional providers including mobile seeds on real US devices. Send your campaigns to the list and the seed accounts open emails and move them out of spam and scroll and click links so your actual campaigns get real engagement.
SPF and DKIM and DMARC are the core protocols in Google's sender requirements. Warmy's DMARC monitoring shows who is sending as your domain and what fails and the exact record to change and domain and IP reputation is tracked with alerts when a signal drops.
Warmy's placement tests run outside the warmup network and break results down by provider and show how many emails reached the inbox and Promotions and spam. Scheduled auto-tests keep a fresh baseline so you can see if a change helped.
Any tool that promises Primary placement should be judged on two things. Where the email actually lands and whether that changed what customers did. No single method shows both so use them together.
Seed placement test
A/B test with a holdout in Klaviyo
Complaint and spam-rate tracking
Run a baseline placement test before you change anything.
Split a comparable audience into a test group and a holdout and keep the content and send time the same.
Judge clicks and revenue per recipient and not opens. Apple Mail Privacy Protection and other privacy features inflate open rates.
Watch spam complaints in Google Postmaster Tools. Gmail asks bulk senders to keep the spam rate below 0.3%.
Repeat across several campaigns before you decide it works.
Does Mailmend work for your list? This is how you'd find out and Warmy's placement tests give you the independent half of the answer.
Check the result independently. Warmy's placement tests show how many emails reach the inbox and Promotions and spam at Gmail and every other provider.
Keep the basics covered. Mailmend doesn't list warm-up or authentication or reputation monitoring and Warmy handles those for the same domain.
Stay in Klaviyo. Warmy works with Klaviyo and other ecommerce platforms so nothing changes in your sending setup.
If your emails are going to spam and not Promotions a Primary-tab fix won't reach the cause. Looking for a Mailmend alternative that covers reputation and authentication and placement across providers? Start a 7-day trial and run a baseline test and compare.
This page is written by Warmy so we have a stake in the outcome. Every Mailmend detail comes from Mailmend's own website and pricing page and was checked October 2026 and we point out what Mailmend does well. We keep vendor claims like customer counts and revenue lifts and guarantees separate from features we could confirm and we don't repeat numbers we can't verify. Where a detail isn't published we say "not listed." Warmy details come from Warmy's pricing page and product documentation. Spot something out of date? Tell us and we'll correct it.
Book a free demo or get a free 7-day trial (no credit card required) and see how Warmy can improve your email deliverability.
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