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Side-by-side comparisonBy the Warmy deliverability team Updated 9 min read
Smartlead facts checked against its own website and help center, October 2026
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Smartlead is a cold email platform from $39/month with unlimited mailboxes and Smartlead warmup included. The warmup pool depends on your plan and placement testing runs through its SmartDelivery add-on after seven free tests. Warmy is a deliverability platform from $49/month per mailbox with placement tests in every plan and it works with any sender and Smartlead too.
Short version: Smartlead is built to send and Warmy is built to manage deliverability. The two work well together.
Key differences
Same goal which is inbox placement but the two tools do different jobs. Here's the quick read.
Warmy: Dedicated email deliverability platform
Smartlead: Cold email platform with built-in warmup
Warmy: $49/month per mailbox ($41 billed annually)
Smartlead: $39/month, unlimited mailboxes
Warmy: The same 1M+ warm-up network on every plan
Smartlead: Pool tier depends on plan: Foundation, Growth, or Premium
Warmy: Included in every plan
Smartlead: Seven free manual tests, then SmartDelivery from $49/month
Warmy: 24/7 support, onboarding manager, and dedicated CSM on every plan
Smartlead: CSM calls from Unlimited Smart; dedicated manager on Unlimited Prime
Warmy: Yes. Connect your Smartlead mailboxes to Warmy
Smartlead: Yes. Keep Smartlead for sending
You can keep sending from Smartlead. Here's what a dedicated deliverability layer adds.
Smartlead's SmartDelivery gives you seven free manual placement tests and then moves to paid plans from $49/month with 120 campaign sequence tests on the entry tier. Warmy includes placement tests in every plan so checking where a campaign lands doesn't need a second subscription.
Why it matters: you can test before every big send and you don't have to watch a separate budget line.
Smartlead's warmup covers the mailboxes connected to Smartlead. If your domain also sends newsletters from Klaviyo or sequences from HubSpot or product email through SendGrid Warmy can warm and monitor those mailboxes in the same dashboard.
Why it matters: mailbox providers judge your domain on all of its mail and not only the cold emails.
On Smartlead your plan decides which warmup pool your mailboxes join: Foundation on Base, Growth on Pro and Premium from Unlimited Smart. Every Warmy plan runs on the same 1M+ warm-up network with a working-hours schedule. From Business up you pick the warmup language and from Premium up the warmup topic.
Why it matters: warmup traffic that matches your real campaigns sends cleaner signals to Gmail and Outlook.
Every Warmy plan includes 24/7 support and an onboarding manager and a dedicated CSM backed by a team of 120+ deliverability experts. On Smartlead CSM calls start with Unlimited Smart ($174/month) and a dedicated manager comes with Unlimited Prime ($379/month).
Why it matters: when replies drop mid-campaign you talk to someone who reads your data whatever plan you're on.
Source: G2 comparison of Smartlead and Warmy, as of October 29, 2026.
| G2 rating | Warmy | Smartlead |
|---|---|---|
| Quality of Support | 9.4 | 8.6 |
| Ease of Use | 9.4 | 8.8 |
| Meets Requirements | 9.4 | 8.9 |
| Email Deliverability category | 9.1 | 8.5 |
Smartlead helps you send cold email at scale and sells deliverability tools on top. Warmy is the deliverability layer itself. Here's the full picture including where Smartlead is the stronger pick.
| Criterion | Warmy | Smartlead |
|---|---|---|
| Positioning | All-in-one, self-serve email deliverability infrastructure | Cold email outreach platform with built-in warmup |
| Warmup networkKey difference | 1M+ real, protected Google Workspace, Microsoft 365, and B2C mailboxes; the same network on every plan | Shared pool; tier depends on plan (Foundation, Growth, Premium); Ultra Premium by eligibility |
| Warmup settings | Working-hours schedule on every plan; warmup language from Business; warmup topic from Premium | Daily warmup volume and ramp-up settings |
| Seed listKey difference | Seed List suite: 500,000+ real US seed accounts, desktop and mobile | Seed accounts used inside SmartDelivery tests; no standalone seed list product |
| Inbox placement testingKey difference | Included in every plan | Seven free manual tests, then SmartDelivery from $49/month; also works for mailboxes outside Smartlead |
| Reputation and blacklist monitoring | Domain and IP reputation tracking, blacklist alerts, spam-placement reports | 400+ blacklists monitored with alerts in SmartDelivery |
| Authentication | SPF, DKIM, and DMARC tracking, record checks, and DMARC report analysis | SPF, DKIM, and DMARC checks and DMARC reports in SmartDelivery; free checkers on its website |
| Google Postmaster integrationKey difference | Included on every plan | Not listed on its pricing page |
| AI | Adeline AI on every plan | SmartAssistant: AI diagnostics for DNS, warmup, connections, and spam triggers |
| Email verification | Built-in | Credit packs from $32, on all plans |
| Campaign sending | Not a sending tool; works with any ESP or outreach tool | Sequences, mailbox rotation, unlimited mailboxes |
| Developer API | Documented API | API and webhooks from Pro |
| Agencies | Agency dashboard | Client workspaces and white-label at $29/month each from Pro; 3 included on Unlimited Prime |
| SupportKey difference | 24/7 support; onboarding manager and dedicated CSM on every plan | CSM calls from Unlimited Smart; dedicated manager and private Slack on Unlimited Prime |
| Pricing model | Per mailbox, from $49/month; annual billing gets two months free | Flat plans from $39/month with unlimited mailboxes; annual billing saves 17% |
| Free trial | Seven days, no credit card required | Free trial, no credit card required |
Smartlead details come from its public pricing page and help center and were checked October 2026 (see sources). Smartlead is a trademark of its respective owner.
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Warmy publishes five plans. Smartlead prices four plans by sending volume and contacts.
| Pricing detail | Warmy | Smartlead |
|---|---|---|
| Starting price | $49 / month | $39 /month (Base) |
| Billing | Monthly | Monthly or yearly |
| Plans |
|
|
| Placement tests | Included in every plan | SmartDelivery: 7 free manual tests, then from $49/month |
| Also included | Google Postmaster integration, API access, custom warmup settings, agency dashboard, Deliverability Academy, private community. 7-day free trial, no credit card. | Verified prospect emails as an add-on |
Prices in USD from each vendor's public pricing page, checked October 2026. Prices can change so confirm on the vendor's site before buying.
Smartlead's entry price covers sending. Placement testing and stronger warmup pools sit on top. Here's how the monthly numbers add up once the seven free tests are used.
| Setup | Monthly cost | What you get |
|---|---|---|
| Smartlead Base + SmartDelivery Growth | $39 + $49 = $88 | Sending (6,000 emails/month), Foundation warmup pool, 120 placement tests |
| Smartlead Unlimited Smart + SmartDelivery Growth | $174 + $49 = $223 | Sending (150,000 emails/month), Premium warmup pool, CSM calls, 120 placement tests |
| Your Smartlead plan + Warmy Starter | Your plan + $49 per mailbox | 1M+ warm-up network, 100 warmup emails/day, placement tests, onboarding manager, and dedicated CSM |
If you warm dozens of mailboxes Smartlead's flat pricing is hard to beat on cost. Warmy makes the most sense on the mailboxes and domains that carry your revenue or when you need deliverability help across more than one sender.
Rated 4.8/5 on G2 and 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.”
Need a cold email sender? Smartlead fits. Need to know and fix where your emails land? Warmy fits and the two work together.
Placement tests without a separate add-on
Included in every Warmy plan.
Deliverability for any sending tool
Works with ESPs, CRMs, and outreach tools alike.
The same warmup network whatever plan you're on
1M+ warm-up network from Starter up.
Hands-on expert help on every plan
24/7 support, onboarding manager, and dedicated CSM.
A cold email sequencer
Smartlead runs multi-mailbox outreach campaigns.
To warm dozens of mailboxes at a flat price
Smartlead includes unlimited mailboxes and warmup.
White-label sending for agency clients
Client workspaces from $29/month each.
See where your cold emails really land. Run a free deliverability test or start a 7-day free trial.
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. Every plan uses that same network. Warmup sends during working hours in the recipient's time zone and ramps up gradually and slows down at night and on weekends.
Warmy simulates natural engagement. It opens emails and replies and marks them as important and rescues them from spam. From the Business plan up you can pick the warmup language and from Premium up the topic so warmup traffic looks like the mail you actually send. Auto-archive keeps warmup messages out of your inbox.
The other difference is where it works. Warmy's warmup isn't tied to one sending tool so a mailbox you use in Smartlead and a domain you send newsletters from can sit side by side in one dashboard.
Smartlead is a cold email platform for sending sequences across many mailboxes and rotating senders and managing replies. Warmup is built into it.
The method is peer-to-peer. When you connect a mailbox and turn warmup on it joins Smartlead's shared pool. Smartlead sends warmup emails between mailboxes in the pool and pool members open and reply to them automatically. Warmup is included on every plan with no per-mailbox charge and that's what Smartlead means by unlimited Smartlead email warmup.
Smartlead also recommends keeping warmup running after campaigns start. It balances warmup and campaign sends within each mailbox's daily limit so warmup volume drops as campaign volume grows.
Unlimited doesn't mean identical. The pool your mailboxes join is tied to your plan.
| Pool | Available on | What Smartlead says it's for |
|---|---|---|
| Foundation | Base ($39/month) | Entry-level warmup for low-volume sending and early reputation building |
| Growth | Pro ($94/month) | A step up for growing volume |
| Premium | Unlimited Smart ($174) and Unlimited Prime ($379) | Higher-quality pool for scaling |
| Ultra Premium | By eligibility (Pro and Unlimited Smart users can qualify) | Smartlead's highest-quality pool, based on account criteria |
Both tools can show you where emails land. The difference is how you get there and what it costs and what sits around the test.
SmartDelivery is Smartlead's placement testing tool. It sends your email to seed accounts at Gmail and Outlook and Yahoo and other providers and reports inbox and Promotions and spam placement. It also monitors 400+ blacklists with alerts and checks SPF and DKIM and DMARC and shows DMARC reports. You can run manual tests on mailboxes outside Smartlead too.
You get seven free manual tests. After that SmartDelivery is a separate plan: Growth at $49/month (120 campaign sequence tests) and Pro at $174/month (unlimited tests plus extras like placement-optimized copy and white-label access) and Expert at $599/month. Inside the app SmartAssistant adds AI diagnostics for DNS and warmup and spam triggers.
You're on Base and replies are falling
Your mailboxes warm up in the Foundation pool and your free tests are used. Before you upgrade two subscriptions run a placement test on your real campaign template to see if the problem is reputation or content or a specific provider.
One domain and more than one sender
Cold email goes out through Smartlead but the same domain sends newsletters from Klaviyo or follow-ups from HubSpot. Smartlead's warmup only covers the mailboxes connected to it. Domain-level monitoring and DMARC reports show the whole picture.
An agency with clients on different senders
Some clients send from Smartlead and others from an ESP or their own SMTP. One deliverability dashboard across all of them is easier than one per sending tool.
Warmy's placement tests run outside the warmup network and break results down by provider and show inbox and Promotions and spam. Scheduled auto-tests keep a fresh baseline. Keep the template and provider mix consistent between tests and if most of your recipients use Microsoft 365 watch those results before raising volume even when the overall score looks healthy.
Warmy's Seed List suite gives you 500,000+ real US seed accounts across Gmail and Outlook and Yahoo and corporate and regional providers including mobile seeds on real US devices.
Send your campaign to the list and the seed accounts open emails and move them out of spam and scroll and click links. You get placement data from real mailboxes and engagement signals on your actual campaign.
Smartlead uses seed accounts inside SmartDelivery to measure placement. It doesn't offer a standalone seed list for adding engagement to live sends.
Start with authentication. SPF and DKIM and DMARC are the core protocols in Google's sender requirements and one failing record can undo weeks of warmup.
Smartlead offers free SPF and DKIM and DMARC and blacklist checkers on its website plus full checks and DMARC reports inside SmartDelivery. If you buy mailboxes through Smartlead's SmartSenders DNS is set up for you.
Warmy's DMARC monitoring shows who is sending as your domain and what fails and the exact record to change. Free SPF and DMARC generators create correct records in minutes and the free Template Checker flags spam triggers in your copy before you send.
You don't need to move anything out of Smartlead. Here's a simple way to set it up.
Connect your sending mailboxes. Add the mailboxes you send from in Smartlead to Warmy via OAuth or SMTP/IMAP. Not sure how many you need for your volume? The free Mailbox Calculator will tell you.
Check authentication. Review SPF and DKIM and DMARC in Warmy and fix anything that fails before you raise volume.
Run a baseline placement test. Use your real campaign template to see inbox and Promotions and spam results by provider.
Scale against the baseline. Schedule auto-tests and raise volume step by step while the results hold.
Every Smartlead detail on this page comes from Smartlead's own pricing page and help center, checked October 2026. Where Smartlead's pages disagree we go with the pricing page and help center over blog posts. Where a detail isn't published we say "not listed" and we don't guess. Warmy details come from Warmy's pricing and product documentation. Ratings come from G2 on the date shown.
Spot something out of date? Tell us and we'll correct it.
Warmy publishes this page and sells one of the products compared. Smartlead is a trademark of its respective owner and Warmy isn't affiliated with or endorsed by Smartlead.
Update history
October 29, 2026: Page published. Smartlead pricing, SmartDelivery, warmup pools, and G2 ratings checked.
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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