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Instantly Warmup vs Warmy: Built-in Warmup or a Dedicated Platform? (2026)

By the Warmy deliverability team Updated 7 min read

Instantly facts checked against its own website, October 2026

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real warmup mailboxes
1M+
real warmup mailboxes
US seed accounts
500K+
US seed accounts
per month, billed monthly
$49
per month, billed monthly
human support
24/7
human support

Instantly is a cold email platform. Warmup comes inside its outreach plans (Growth $47/month, Hypergrowth $97, Light Speed $358), and Instantly says there's no warmup-only plan. Inbox placement testing is a separate add-on.

Warmy is a dedicated deliverability platform from $49/month that works alongside any sender, including Instantly: a 1M+ mailbox network, a 500,000+ US seed list, placement tests, and DMARC monitoring.

Key takeaways

Instantly vs Warmy at a glance

Warmy pricing
Five plans from $49/month to $429/month, billed monthly.
Instantly pricing
Outreach plans $47, $97, $358/month; warmup included, no warmup-only plan.
Focus
Instantly is built for sending campaigns. Warmy is built only for deliverability.
Placement testing
Instantly sells Inbox Placement as an add-on. Warmy includes tests on every plan.
Works together
Many teams send with Instantly and use Warmy to warm up and monitor the same mailboxes.

Side by side

Warmy vs Instantly

Instantly's warmup supports its own sending. Warmy works with whatever you send from.

  • Positioning

    WarmyAll-in-one, self-serve email deliverability infrastructure
    InstantlyCold email outreach platform with built-in warmup

  • Warmup network

    Warmy1M+ real, protected Google Workspace, Microsoft 365, and B2C mailboxes
    InstantlyWarmup pool; size not disclosed

  • Seed list

    Warmy500,000+ real US seed accounts, desktop and mobile; rotated monthly; speeds up warmup
    InstantlyNot listed

  • Warmup-only plan

    WarmyYes, Warmy is deliverability-only
    InstantlyNo; warmup comes with outreach plans

  • Inbox placement testing

    WarmyIncluded: 5–50 tests/month by tier, with automated testing
    InstantlySeparate Inbox Placement add-on

  • Authentication tools

    WarmySPF, DKIM, and DMARC tracking, record checks, and DMARC report analysis
    InstantlyNot a focus of the outreach plans

  • Works with other senders

    WarmyKlaviyo, Mailchimp, HubSpot, SendGrid, ActiveCampaign, Google Workspace, Microsoft 365, and SMTP
    InstantlyWarms accounts connected to Instantly

  • Email verification

    WarmyBuilt-in
    InstantlyLead verification via Instantly credits

  • Developer API

    WarmyDocumented API included on every plan
    InstantlyAPI, Zapier, and webhooks on outreach plans

  • Customer support

    Warmy24/7 human support; dedicated CSM and deliverability consultant on Expert/Platinum
    InstantlyChat support; priority support on higher plans

  • Pricing

    WarmyFrom $49/month, billed monthly
    InstantlyOutreach from $47/month

  • Free trial

    WarmySeven days, no credit card required
    Instantly14-day trial with limited contacts and emails

Instantly details come from its public website and help pages, checked October 2026 (see sources). Instantly is a trademark of its respective owner.

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01

Email warmup process

Warmy email warmup runs through your existing provider on a protected network of over a million real Google Workspace, Microsoft 365, and consumer inboxes. It sends during working hours in the recipient's time zone, ramps up gradually, and slows down at night and on weekends.

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

How Instantly does itInstantly includes unlimited warmup for connected accounts on paid outreach plans, with advanced warmup settings on higher tiers.
02

Using seed lists

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

Send your campaigns to the list and the seed accounts open emails, move them out of spam, scroll, and click links. Combined with peer-to-peer warmup, this warms new mailboxes and domains much faster than warmup alone.

How Instantly does itInstantly doesn't list a seed list for engaging with your campaigns.
03

Authentication and sender reputation

Start with authentication. SPF, DKIM, and DMARC are the core protocols in Google's sender requirements.

Warmy's DMARC monitoring shows who is sending as your domain, what fails, and the exact record to change. Free SPF and DMARC generators create correct records in minutes, and domain and IP reputation is tracked continuously with alerts when a signal drops.

How Instantly does itInstantly offers reputation protection and bounce detection inside its sending platform.
04

Measuring results

Warmy's placement tests run outside the warmup network and break results down by provider, showing inbox, Promotions, and spam. Scheduled auto-tests keep a fresh baseline.

Keep the template and provider mix consistent between tests. If most of your recipients use Microsoft 365, watch those results before raising volume, even when the overall score looks healthy.

How Instantly does itInstantly sells Inbox Placement testing as a separate add-on.

Pricing

Instantly vs Warmy Pricing

Warmy offers five deliverability plans. Instantly sells outreach plans with warmup included, plus separate credits and add-ons.

Warmy and Instantly pricing compared
Pricing detailWarmyInstantly
Starting price$49 / month$47 / month (outreach)
BillingMonthlyMonthly or annual
Plans
  • Starter100 warmup emails/day · 5 tests/mo$49
  • Business300 warmup emails/day · 10 tests/mo$129
  • Premium1,000 warmup emails/day · 25 tests/mo$189
  • Expert2,000 warmup emails/day · 50 tests/mo$279
  • Platinum5,000 warmup emails/day · 50 tests/mo$429
  • Growth5,000 emails · 1,000 contacts$47
  • Hypergrowth125,000 emails · 25,000 contacts$97
  • Light Speed500,000 emails · 100,000 contacts$358
  • EnterpriseCustom
Placement testsIncluded in every planInbox Placement add-on, priced separately
Also includedGoogle Postmaster integration, API access, custom warmup settings, agency dashboard, Deliverability Academy, private community. 7-day free trial, no credit card.Lead data and AI agents via separate credit plans

Prices in USD from each vendor's public pricing page, checked October 2026. Prices can change; confirm on the vendor's site before buying.

Social proof

What Senders Are Saying about Warmy

Rated 4.9/5 on G2 and trusted by 35,000+ businesses.

TESTIMONIALS

Loved by senders who live in the inbox

★★★★★5.0
“Warmy has been a game changer for us. The platform pays for itself many times over.”
Darren Prine
Co-founder and CRO, Cloud Tech Gurus
★★★★★5.0
“If you do cold email, Warmy will increase your efficiency, improve your deliverability, and cut your costs.”
Thomas TzouridisThomas Tzouridis
CEO, ActiScale
★★★★★5.0
“I've purchased many marketing tools before. Often, once you buy, you're on your own. With Warmy, they care about you.”
Gábor Majer
Founder, Nord Sales Company

The verdict

When to Choose Warmy vs Instantly

Keep Instantly for sending if you like it. Use Warmy to make sure those emails reach the inbox.

Which tool to choose for each need
If you want…Choose
Deliverability independent of your senderWarmy works with any ESP, CRM, or SMTP setup. Warmy
Placement tests includedNo add-on needed. Warmy
A seed list and DMARC monitoringBoth included in Warmy. Warmy
Expert deliverability help24/7 human support and a dedicated consultant on Expert and Platinum. Warmy
To send cold campaigns and find leadsInstantly is a sending and lead platform.Instantly

Using Instantly already? Connect the same mailboxes to Warmy in minutes. Start with a free deliverability test.

FAQ

FAQs

Instantly is a cold email sending platform with built-in warmup. Warmy is a dedicated deliverability platform with a 1M+ mailbox network, a 500,000+ US seed list, placement tests, and DMARC monitoring that works with any sender.

Sources & methodology

How we checked this comparison

Every Instantly detail on this page comes from Instantly's own public website and help pages, checked October 2026. Where a detail isn't published, we say "not disclosed" rather than guess. Warmy details come from Warmy's pricing page and product documentation. Spot something out of date? Tell us and we'll correct it.

  • Instantly pricing page
  • Instantly Help: Plans overview
  • Instantly Help: Outreach plans comparison

See Warmy's warmup, monitoring, and deliverability tools in action

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