Warmerly
Yes
Warmerly
Smartlead
One-to-one · Built-in campaign sender
Built-in campaign sender
One row, in depth: what each tool does, the verified numbers, and who each suits.
Smartlead details read from its pricing page, home page and help centre on 17 and 19 October 2026.
Warmerly
Yes
Smartlead
Yes
The short answer
Built-in campaign sender, in one look.
Both send multi-step email sequences from your own connected mailboxes, with A/B variants, a schedule and stop-on-reply. Smartlead sells its sending by monthly email and contact allowance (Base $39: 6,000 emails; Prime $379: 500,000), rotates across unlimited mailboxes and adds manual task and call steps. Warmerly does not meter sends on paid plans, limits mailboxes by plan, puts LinkedIn steps and condition branches in the same sequence, ramps new mailboxes from 3 a day, scales a mailbox down as its bounce rate climbs, and runs a launch-readiness check before Start. Smartlead publishes more in its API docs on rotation and sending limits and says it has a high bounce rate auto-protection, but gives no threshold. Last checked 19 October 2026.
Smartlead
Yes
The picture
Drawn side by side.
How fast a new mailbox gets to full volume
Emails per mailbox per day, over the first 20 sending days
WarmerlySmartlead
01020304050
Smartlead suggests 40 to 50 a day per mailbox, warm-ups included
Warmerly's default mailbox limit: 30 a day
Day 13: 15 a day
Day 1: 3 a day
1510131520
Emails per mailbox per day (vertical)Sending day (horizontal)
| Sending day | Emails per mailbox per day |
|---|---|
| 1 | 3 |
| 5 | 7 |
| 10 | 12 |
| 13 | 15 |
| 14 and after | 15 |
What happens as bounces climb
Drag the bounce rate and see what Warmerly does to the mailbox
WarmerlySmartlead
| Bounce rate over 7 days | Effect on the mailbox's daily cap |
|---|---|
| Under 2 per cent | Untouched |
| 2 to 3 per cent | Multiplied by 0.75 |
| 3 to 5 per cent | Multiplied by 0.5 |
| 5 per cent and over | Multiplied by 0.25 |
| 7 per cent and over | Mailbox paused |
| Under 25 sends | No action |
What a month of sending could cost
Set your mailboxes and limits, then see which plan covers the volume
WarmerlySmartlead
Up to 6,600 emails a month at full limits, before any ramp
Warmerly
Growth, $49 a month
Priced by mailboxes: Starter $19 (5), Growth $49 (25), Agency $179 (100). No send meter on paid plans, so the limit you hit first is each mailbox's daily limit.
Smartlead
Base, $39 a month
- Base $396,000
- Pro $9490,000
- Unlimited Smart $174150,000
- Unlimited Prime $379500,000
Arithmetic only: mailboxes x daily limit x sending days. Smartlead also counts contacts (Base 2,000, Pro 30,000), so a plan can run out of contacts before emails. A real campaign sends fewer, because of ramps, follow-up timing and lead limits. Prices read 19 October 2026 and change.
| Product | Plan | Price a month | Allowance |
|---|---|---|---|
| Smartlead | Base | $39 | 6,000 emails, 2,000 contacts |
| Smartlead | Pro | $94 | 90,000 emails, 30,000 contacts |
| Smartlead | Unlimited Smart | $174 | 150,000 emails |
| Smartlead | Unlimited Prime | $379 | 500,000 emails |
| Warmerly | Starter | $19 | 5 mailboxes, no send meter |
| Warmerly | Growth | $49 | 25 mailboxes, no send meter |
| Warmerly | Agency | $179 | 100 mailboxes, no send meter |
Feature by feature
Where Smartlead is ahead, where we are, and where it is even
WarmerlySmartlead
| Feature | Warmerly | Smartlead |
|---|---|---|
| Multi-step sequences with waits | Yes. Email and wait steps | Yes. Multi-step email sequences with timed follow-ups |
| Branching inside a sequence | Yes. Condition steps on opened, clicked, replied or timeout (canvas editor) | Partly. Subsequences triggered by lead categories; stop on reply, clicks or opens |
| LinkedIn steps in the sequenceWarmerly ahead | Yes. Connection and message steps | Not found. Not among its step types (Email, Manual Task, Call) |
| Manual task and call stepsSmartlead ahead | Not found. Not in our step list | Yes. Manual Task, and Call for SmartDialer users |
| A/B variants | Yes. Any email step; winner on genuine replies, then opens | Yes. Subject or body; pattern-based or randomized split |
| Rotation across a large fleetSmartlead ahead | Partly. Mailboxes you assign; 5, 25 or 100 by plan | Yes. Automatic rotation, unlimited accounts |
| Ramp for new mailboxesWarmerly ahead | Yes. 3 a day, up 1 a day to 15 | Not found. Not described in the setup article |
| Bounce protectionWarmerly ahead | Yes. Graded brake, pause at 7 per cent, thresholds published | Partly. Auto-protection exists; threshold not published |
| Pre-launch checkWarmerly ahead | Yes. 13 kinds; errors block, warnings need acknowledging | Partly. Three: leads, a step, accounts assigned |
| Client workspaces and white labelSmartlead ahead | Partly. Client workspaces on Agency | Yes. From Pro; 3 on Prime; white label $29 a month per client |
On screen
What it looks like.
WarmerlySample data
How Warmerly does it
Warmerly, in detail.
Sequences with email, wait, LinkedIn and condition steps, per-mailbox daily limits, a volume ramp, a graded bounce brake with a pause at 7 per cent, spam-flag slow-downs and a pre-launch readiness check. Sends are not metered on paid plans.
01
Sequences and branching
A sequence is made of email steps, wait steps, LinkedIn connection and message steps, and condition steps that branch on opened, clicked, replied or timeout, in a list editor or a drag-and-drop canvas (only the canvas can build branches). Templates include a plain three-step intro and a LinkedIn-then-email sequence.
Warmerly product, checked 19 October 2026
02
Scheduling
Each campaign has sending days (Monday to Friday by default), an hour window (09:00 to 17:00 by default) and a timezone. A recipient-local window (08:00 to 17:00 by default) is evaluated in the lead's own timezone when it can be worked out from country and region.
Warmerly product, checked 19 October 2026
03
Per-mailbox limits and pacing
Each mailbox has its own daily campaign limit, 30 by default. A campaign can add a volume ramp (3 emails per mailbox on day 1, rising by 1 a day to 15 by default), switched on automatically for young mailboxes. A reputation brake scales a mailbox down once its seven-day bounce rate passes 2 per cent, and a campaign pauses at 7 per cent bounces or 30 per cent undeliverable leads, each after at least 25 sends.
Warmerly product, checked 19 October 2026
04
Pre-launch readiness check
A check runs before Start. Errors block the launch, such as no usable step, no sending account, no queued leads or an unknown merge tag. Warnings do not block, but Start refuses once until you acknowledge them, such as a sender whose DNS check is warn or fail, more than five senders on one domain, spam-style copy or no tracking domain for the unsubscribe link.
Warmerly product, checked 19 October 2026
05
A/B variants, unsubscribes and replies
Any email step can run versions side by side. A winner is picked on genuine replies first and falls back to opens, and open tracking is off by default. Campaign emails carry List-Unsubscribe headers and a footer link, unsubscribes go on a workspace-wide suppression list, and a genuine reply stops the lead's sequence by default.
Warmerly product, checked 19 October 2026
06
What is and is not capped
Sending is not metered on paid plans. The Free plan is capped at 100 campaign sends a month and 1 mailbox. Mailboxes are limited by plan (5, 25, 100) and leads per campaign are limited on Starter (2,500).
Warmerly product, checked 19 October 2026
07
The ramp counts sending days
The default ramp is 3, 4, 5 and so on up to 15, reaching full volume on the 13th sending day. A day means a day in the campaign's sending days, so with Monday to Friday sending, weekends hold the cap flat. The ramp can only tighten a mailbox's own daily limit, never raise it.
Warmerly product, checked 19 October 2026
08
A bounce brake before the pause
Below 2 per cent bounces over 7 days a mailbox is untouched. From 2 per cent its daily cap is multiplied by 0.75, from 3 per cent by 0.5 and from 5 per cent by 0.25. At 7 per cent the mailbox is paused instead. None of it applies under 25 sends, and the cap never goes below 1 a day.
Warmerly product, checked 19 October 2026
09
Thirteen kinds of launch check
The readiness table lists 13 kinds of check, 7 that block (no usable step, plan gate, no sender, no queued leads, unknown merge tag, missing brief for an AI opener, failed AI provider probe) and 6 that warn (no postal address, thin lead research, DNS warn or fail or more than 5 senders on one domain, a free mailbox still waiting, no tracking domain for the unsubscribe link, spam-style copy). Warnings need one acknowledgement.
Warmerly product, checked 19 October 2026
10
Spam flags slow sending automatically
A sweep of what each mailbox and workspace sends to the outside world writes a send factor. A slow-band mailbox gets 0.5 and a pause-band one 0.25 at once; a slowed workspace gets 0.5 and a restricted one 0.1. The campaign engine applies it with no setting to turn on.
Warmerly product, checked 19 October 2026
How Smartlead does it
Smartlead, in detail.
A cold-email sender built around mailbox rotation and per-mailbox limits, sold by monthly emails and contacts, with unlimited mailboxes, A/B variants, manual task and call steps, and a set of delivery protections whose thresholds are not published.
01
Plans are sized by emails and contacts
Base is $39 a month for 6,000 emails and 2,000 contacts, Pro is $94 for 90,000 emails and 30,000 contacts, Unlimited Smart is $174 for 150,000 emails and Unlimited Prime is $379 for 500,000 emails (monthly billing). The pricing page says all plans include unlimited email accounts. Contacts for the two Unlimited plans are not stated.
smartlead.ai/pricing · read 19 October 2026
02
Sequences, schedule and rotation
The API docs list multi-step email sequences with timed follow-ups, a scheduler with sending times and a timezone field, automatic rotation between your connected email accounts, stop-on-reply settings and open and click tracking with a privacy mode.
api.smartlead.ai/core/campaigns · read 19 October 2026
03
Sending limits
The help centre says the mailbox-level 'Messages per day' setting can be changed, with a recommendation of 40 to 50 in total including cold emails and warm-ups. The campaign setting 'Max new leads sent per day' refers to new leads that receive their first email, and does not include follow-ups. The campaign send interval must be longer than the mailbox's minimum time gap.
helpcenter.smartlead.ai/en/articles/58-issues-with-the-number-of-emails-being-sent-out · read 19 October 2026
04
Categories can trigger subsequences
The lead categories article says categories can be used as triggers for subsequences, for example a lead marked 'Requested info' is added to a 'Send more info' drip sequence automatically.
helpcenter.smartlead.ai/en/articles/51-lead-categories · read 19 October 2026
05
Clients and white label
The pricing FAQ says clients can be added from the Pro plan onwards, Unlimited Prime includes 3 clients or workspaces and 3 SmartServers, and white-labelling is an add-on at $29 a month per client workspace.
smartlead.ai/pricing · read 19 October 2026
06
Step types and A/B variants
The campaign setup help article lists three step types: Email, Manual Task and Call (SmartDialer users only). An email step takes a subject and body, wait times, and A/B variants for subject lines or body copy, with Write with AI, AI Spintax and templates. Variant distribution is Pattern-based (recommended) or Randomized and cannot be changed once the campaign is live.
helpcenter.smartlead.ai/en/articles/442-how-to-create-an-email-campaign-in-smartlead-the-new-version · read 19 October 2026
07
Settings and protections
The same article lists stop-on-reply, clicks or opens, plain text mode, enhanced sending and delivery, switches to disable open and click tracking, a split of sending across Gmail, Outlook and Others, high bounce rate auto-protection, domain-level rate limiting, an unsubscribe message added to all emails, and webhooks. It gives no numbers for the bounce protection, windows or limits.
helpcenter.smartlead.ai/en/articles/442-how-to-create-an-email-campaign-in-smartlead-the-new-version · read 19 October 2026
08
Three launch checks
Before Launch Campaign the article says to confirm leads are added, at least one sequence step exists and email accounts are assigned. It lists no other warnings or validation messages. Statuses are Draft, Active, Paused and Stopped.
helpcenter.smartlead.ai/en/articles/442-how-to-create-an-email-campaign-in-smartlead-the-new-version · read 19 October 2026
09
Matching leads to sender accounts
The API guide describes AI ESP Matching, which matches leads to sender accounts using the lead's email provider, account deliverability scores, sending patterns and historical performance, alongside rotation between connected accounts. It also lists a Follow-up Percentage setting and Min Time Between Emails.
api.smartlead.ai/core/campaigns · read 19 October 2026
10
Reply categorisation is a campaign setting
The campaign settings include 'SmartLead AI reply categorisation' or 'Manual Only'. The article does not say how the categorisation works or how accurate it is.
helpcenter.smartlead.ai/en/articles/442-how-to-create-an-email-campaign-in-smartlead-the-new-version · read 19 October 2026
What Smartlead does not say
We looked, and found no statement on these. That is about its published pages only, not about the product.
- The numbers behind high bounce rate auto-protection and domain-level rate limiting: no threshold, window or minimum sample is published in the pages read.
- Branching conditions inside a sequence beyond stop-on-reply, clicks or opens, and the call-step dispositions: none are described in the setup article.
- LinkedIn steps: not among the step types listed (Email, Manual Task, Call) and not mentioned on the pricing or home page.
- A ramp-up schedule for campaign sends: the help article on send limits gives only the 40 to 50 messages a day recommendation, warm-ups included.
- Any spam-copy check inside the campaign sender. SmartDelivery's copy scoring is a separate add-on.
Watch: Smartlead in its own words
Videos from Smartlead's own channel. They load from YouTube only when you press play.
The numbers
Only what we could verify.
| Measure | Warmerly | Smartlead |
|---|---|---|
| Built-in campaign sender | Yes | Yes |
| Price of the sender | Included in every plan; Free capped at 100 campaign sends a month | From $39 a month (Base), sized by emails and contacts |
| Emails a month | Not metered on paid plans | 6,000 (Base) to 500,000 (Unlimited Prime) |
| Mailboxes | 5, 25 or 100 by plan ($19, $49 or $179 a month); more on a call | Unlimited accounts on every plan |
| Per-mailbox daily limit | 30 campaign sends by default, changeable | Messages per day, 40 to 50 suggested including warmups |
| Mailbox rotation | Campaigns send from the mailboxes you assign to them | Automatic rotation across connected accounts |
| Step types | Email, wait, LinkedIn connection and message, condition | Email, Manual Task, Call (SmartDialer) |
| A/B variants | Any email step; winner picked on genuine replies, then opens | Subject or body variants; pattern-based or randomized split |
| Ramp for new mailboxes | 3 a day, up 1 a day to 15, full on the 13th sending day | Not described in the setup article |
| Bounce protection | Cap x0.75 from 2%, x0.5 from 3%, x0.25 from 5%, paused at 7% | High bounce rate auto-protection; threshold not published |
| Pre-launch check | 13 kinds of check; errors block, warnings need acknowledging | Three: leads added, a sequence step, accounts assigned |
| Spam-style copy check | Launch warning (score 25 or more, over 5 links or 3 images) | Not in the sender; scoring is in the SmartDelivery add-on |
| Client workspaces | Agency plan | From Pro; 3 included on Unlimited Prime; white label $29 a month per client |
| Contacts on the starting plan | Leads per campaign capped at 2,500 on Starter | 2,000 contacts (Base) |
In practice
What it means for you.
Our reading of the facts above. Not a promise, and not the only reasonable reading.
Our reading: the two caps shape the bill
Smartlead's cost rises as you send more. Warmerly's rises as you add mailboxes, and each mailbox also has its own daily campaign limit. At the default of 30 a day, 5 mailboxes reach roughly 4,500 sends in a 30-day month unless you raise the limit, so high volume on few mailboxes needs a higher limit and healthy mailboxes.
Our reading: Smartlead is built for rotation at scale
Unlimited mailboxes, rotation, client workspaces and white label suit agencies running very large fleets. Warmerly's Agency plan covers up to 100 mailboxes with client workspaces.
Our reading: Warmerly leans on guard rails
The readiness check, ramp and reputation brake exist to stop a new mailbox sending too much too soon. They are guard rails some people find helpful and others find restrictive.
Our reading: Smartlead's launch check is short, ours is long
Smartlead names three checks. Warmerly has 13 kinds. More checks are not automatically better: some people want the guard rails and some find the acknowledgement step slows them down.
Our reading: neither product publishes a full recipe
Warmerly's brake and ramp numbers are in our own docs. Smartlead's bounce protection exists but has no published threshold, so test it on a small list before you rely on it.
Our reading: variants exist on both sides
Do not choose on A/B testing alone. Both can run subject or body versions. Smartlead lets you pick a pattern-based or random split, and Warmerly picks a winner on genuine replies before opens.
Who it suits
Pick the one that fits.
Warmerly
Warmerly is the better fit if
- You send from up to 100 mailboxes and prefer not to watch a monthly email meter.
- You want LinkedIn steps and branching in the same sequence as email.
- You want a readiness check and a ramp that slow a new mailbox down automatically.
Smartlead
Smartlead is the better fit if
- You need unlimited mailboxes and automatic rotation across a large fleet.
- You want client workspaces and white-label options built for agencies.
- You send high volume and want a plan sized in emails, up to 500,000 a month.
- You want manual task or call steps in the same campaign, or an AI split of sending by recipient provider.
Questions
How does Smartlead limit sending?
By monthly emails and contacts, from 6,000 on Base ($39) to 500,000 on Unlimited Prime. Accounts are unlimited on every plan.
How does Warmerly limit sending?
Paid plans are not metered. Each mailbox has a daily limit, 30 by default, and Free is capped at 100 campaign sends a month.
Which steps does each sequence support?
Warmerly: email, wait, LinkedIn connection and message, and condition. Smartlead: email, Manual Task and Call (SmartDialer).
How does each handle bounces?
Warmerly scales a mailbox down as its bounce rate climbs and runs a launch-readiness check before Start. Smartlead says it has high bounce rate auto-protection but gives no threshold.
Sources
- Smartlead pricing (read 2026-10-19)
- Smartlead API: campaigns (read 2026-10-19)
- Smartlead help: number of emails sent (read 2026-10-19)
- Smartlead help: lead categories (read 2026-10-19)
- Smartlead home page (read 2026-10-19)
- Smartlead help: create a campaign (read 2026-10-19)
- Smartlead on YouTube (official channel, linked from smartlead.ai)
Smartlead pages were read on 19 October 2026. Plans and wording change, so check the vendor's own page before you decide. Warmerly details come from the product as it runs today.
More features
- All features
- Starting price (per month)
- Mailboxes on the starting plan
- Most mailboxes on a published price
- Emails per month on the starting plan
- Highest published send volume
- Contacts on the starting plan
- Warmup
- Spam-folder rescue
- SPF, DKIM and DMARC monitoring
- Inbox placement testing
- Shared reply inbox
- LinkedIn steps in the same sequence
- Ready-made mailboxes
- Agency and white-label
- Integrations
- API
- Free plan or trial
See it on your own mailbox.
Connect a mailbox. Warmerly runs alongside whatever you send from now, so you can compare before you move anything.
Free plan, no card. Paid plans: 7-day trial, first charge on day 8.