Folderly vs Warmy:  Email Deliverability Platforms Compared (2026)

Warmy email warmup runs through your existing provider on a protected network of over a million real Google Workspace, Microsoft 365, and consumer inboxes. To look like human activity, it runs during working hours in the recipient's time zone, ramps up gradually, and stops at night and on weekends.

Warmy also simulates natural engagement: it opens, replies, and marks emails as important, and rescues them from spam. You can pick warmup providers and use your own templates and topics in 30+ languages. Auto-archive keeps warmup messages out of your inbox.

Warmy offers warmup through a 500,000+ US seed list across Gmail, Outlook, Yahoo, corporate, and regional providers, including mobile seeds on real US devices.

You can download the list or connect via Warmy's API for monthly rotation and then send your warmup campaigns to it. The seed accounts open emails, move them out of spam, scroll, and click links to help build sender reputation before you launch real email campaigns. Combined with peer-to-peer warmup, this warms new mailboxes and domains much faster than warmup alone.

With Warmy, most new domains can expect noticeable improvement within 3–6 weeks. Previously used domains may improve within 3 weeks. The timeline can be shorter if you add seed-list warmup and follow Adeline AI's recommendations. Domains with heavily damaged sender reputations can take longer, and on Expert and Platinum plans, your dedicated CSM can build a recovery plan.

For ongoing upkeep, Warmy automatically pauses warmup sends to providers that reject messages, and also sends blacklist and reputation alerts. For extra context, Adeline AI explains what is hurting inbox placement and what to fix next.

Start with authentication failures. SPF, DKIM, and DMARC are the main email authentication protocols stated in Google's sender requirements.

Warmy's DMARC monitoring identifies the services sending email on your behalf and shows their SPF and DKIM alignment results. To collect these reports, add Warmy's reporting address to your DMARC record. The DMARC tracker shows who is sending as your domain, what fails authentication, and the exact record you should change. You can also use free SPF and DMARC generators to create correct records in minutes.

Warmy continuously tracks domain and IP reputation for every sending domain and IP and sends alerts when a signal drops.

Google's new version of Postmaster Tools no longer displays domain and IP reputation. Warmy still pulls the available data, including spam rate, authentication, and delivery errors, into the same dashboard as your warmup and placement results. Warmy is also launching its own built-in Postmaster-style reputation tracking (coming soon), so you can measure your domain and IP reputation now that Google no longer shows it.

Warmy's placement tests run outside the warmup network and break results down by provider. Auto-tests run on a schedule, always giving you a fresh baseline.

For reliable comparisons, keep the email template and provider mix consistent between tests. If most of your prospects use Microsoft 365, pay close attention to those results before increasing send volume, even if the overall score still looks healthy.

Warmy automatically archives warmup emails to keep your inbox focused on everyday conversations. Review placement results alongside replies and conversions from your campaigns: placement shows where messages land, while campaign responses help you assess how well your targeting and messaging work.

Email deliverability describes your ability to reach recipients' inboxes. Inbox placement testing measures where a sample of messages actually lands.

That distinction matters because a successful delivery only confirms that the receiving server accepted the message, but it could still land in spam. Gmail's Promotions tab still counts as the inbox, so reports should separate tab placement from spam placement.

With Warmy, you get both: warmup builds reputation, while placement tests show inbox, Promotions, and spam placement for each provider.

When comparing results, check what each percentage includes. Server acceptance, delivery to any inbox tab, and primary-only placement measure different things.