Every figure below was read off the vendor's own pricing page on 29 September 2026, in US dollars, and is quoted as published. This page compares on monthly billing, the rate you pay without a yearly commitment, and shows the annual rate beside it where the vendor publishes one. Where a vendor doesn't publish a number, this page says so rather than estimating.
Two findings up front, because they decide what you should buy:
- The same nominal product ranges from $7.50 to $96 per mailbox per month on annual billing. A 12.8× spread for a service every vendor describes in near-identical language. Folderly is the top of that range and publishes only a yearly-billed rate.
- At 50 mailboxes, standalone warmup costs more than a whole sending platform that includes warmup. Standalone runs $199 to $4,800 a month; the four sequencers with warmup included run $69 to $99.
Three pricing shapes (this is the part that matters)
Before the tables: warmup is sold in three structurally different ways, and comparing headline prices across them produces nonsense.
A. Per mailbox. A rate × your inbox count, usually with volume breakpoints. Scales linearly and punishes inbox-heavy setups. (Warmup Inbox, MailReach, Folderly)
B. Pooled daily volume, unlimited inboxes. You buy a total daily warmup send budget and split it across as many mailboxes as you like. Decouples price from inbox count entirely. (Mailivery, and it is the cheapest standalone option at scale because of this, not because the product is cheaper)
C. Included with the sender. Warmup as a feature of a sequencing platform, at no extra charge. The platform's price is driven by monthly email volume and contacts, not mailbox count. (Instantly, Smartlead, Saleshandy, lemlist)
Warmbox sits between A and B: fixed tiers with hard inbox caps.
Standalone warmup, priced
| Vendor | Monthly billing | Annual billing | Shape | Daily warmup volume | Notes as published |
|---|---|---|---|---|---|
| Warmup Inbox | Basic $19/inbox, Pro $59, Max $99 (1 inbox) | Basic $15, Pro $49, Max $79 | Per mailbox, falling with every inbox added | 75 / 250 / 1,000 per inbox | Basic per inbox, monthly: $16 at 10 inboxes, $12 at 25, $9.50 at 50. Annual: $12.50, $9, $7.50. The page opens on annual. 7-day trial, no card. Above 50 inboxes, quoted. |
| Warmbox | Solo $19 (1 inbox), Start-up $79 (3), Growth $159 (6) | $15 / $69 / $139 | Fixed tiers, hard inbox caps | 50 / 250 / 500 total | Published tiers stop at 6 inboxes; above that, custom. Lists Gmail, Outlook, Yahoo, iCloud, Zoho, SendGrid, Brevo, Mailgun and Amazon SES. |
| MailReach | $25/mailbox (1 to 5), $19.50 (6 to 20), $18 (21 to 50), $16 (51 to 100) | $20 / $15.60 / $14.40 / $12.80 | Per mailbox, banded | Up to 100 per mailbox | Warmer plus 20 spam-test credits. More credits monthly: 50 for $30, 200 for $95, 500 for $210. Above 100 mailboxes, custom. A banner offers 20% off the first 30 days: a promotion, not the rate. |
| Mailivery | Starter $29, Professional $79, Business $199 | $21.75 / $59.25 / $149.25 | Pooled volume, unlimited mailboxes | 200 / 800 / 2,500 shared (plan cards). The comparison section on the same page says 100 / 600 / 2,000 | Per-mailbox cap 100/day on Starter, 250/day on the other two. Includes verification credits (100 / 500 / 2,000), placement tests (10 / 30 / 100), blacklist monitors (2 / 10 / 50), seats (2 / 4 / 10). |
| Warmy.io | "Plans starting from $49 / month", the entire published figure | Not published | Undisclosed | Not published | No tier names, no per-mailbox rate, no breakpoints. Describes a 1M+ mailbox network, a seed list, Postmaster data and an API. 7-day trial, no card. |
| Folderly | Not published | $96/mailbox/mo, shown under "Yearly, Save 20%" | Per mailbox | Not published | The pricing URL now redirects to a products page, which shows only the yearly rate. Its placement-testing product: free for 2 tests/mo, $79/mo for 100 tests, or $799/year. Demo requested for the main product. |
Census: 5 of 6 publish a usable price. Warmy publishes a floor, which for budgeting purposes is not a price. It is an invitation to a call. Folderly publishes a price only for yearly billing, so any monthly comparison with it is uneven by construction; the tables below mark it.
The spread: $7.50/mailbox (Warmup Inbox Basic at 50 inboxes, annual) to $96/mailbox (Folderly, yearly). That is 12.8×. None of these vendors publishes evidence that would justify the difference, and none can: warmup effectiveness is not independently measurable from outside the mailbox providers.
Bundled warmup: the senders that include it
| Vendor | Monthly billing | Annual billing | Mailboxes | Sends per month | Warmup |
|---|---|---|---|---|---|
| Smartlead | Base $39, Pro $94, Unlimited Smart $174, Unlimited Prime $379 | $32.50 / $78.30 / $144.50 / $314.60 | "All Smartlead plans include unlimited email accounts at no extra cost" (vendor FAQ) | 6,000 / 90,000 / 150,000 / 500,000 | Warmup pool on every tier, graded by plan: "Foundation" on Base, "Growth" on Pro, "Premium" on the two Unlimited tiers |
| Saleshandy | Starter $41, Pro $99, Scale $189 | $34 / $76 / $149 | Unlimited, "no per-inbox fees"; sender rotation across 10 / 100 / 1,000 accounts | 6,000 / 100,000 / 200,000 | Included on all tiers; "daily warm-up sending limit as per your plan" |
| Instantly | Growth $47, Hypergrowth $97, Light Speed $358; Enterprise custom | $37.60 / $77.60 / $286.30 | "Unlimited Email Accounts" on all published tiers | 5,000 / 125,000 / 500,000 (the annual view lists Hypergrowth at 100,000) | "Unlimited Email Warmup" on all published tiers |
| lemlist | Email $69, Multichannel $109 per user; Enterprise custom | $55 / $87 | Email: "unlimited users & email senders". Multichannel: 5 senders per user | 50,000 on Email as displayed (the volume is selectable); unlimited on Multichannel | "lemwarm and built-in deliverability protections are included in all plans" |
Note what drives the bundled price: monthly send volume and contact counts, not mailbox count. Every entry tier here stops at 5,000 to 6,000 sends a month, except lemlist's. Forty mailboxes sending 3,000 emails a month in total fit the entry tier of Smartlead, Instantly and lemlist; Saleshandy's Starter connects them all but rotates a sequence across only 10.
The arithmetic
Warmup cost only, at three scales, on each vendor's published monthly-billing rate and its cheapest tier that covers the sending. Annual rates are in the notes.
1 mailbox
| Option | Monthly | What you get |
|---|---|---|
| Warmup Inbox Basic | $19 | warmup only, 75/day ($15 annual) |
| Warmbox Solo | $19 | warmup only, 50/day ($15 yearly) |
| MailReach | $25 | warmup + 20 spam tests ($20 annual) |
| Mailivery Starter | $29 | warmup 200/day + verification + 10 placement tests |
| Smartlead Base | $39 | warmup + the whole sequencer, 6,000 sends/mo |
| Saleshandy Starter | $41 | warmup + the whole sequencer, 6,000 sends/mo |
| Warmy | ≥$49 | undisclosed |
| Folderly | $96 (yearly billing only) | warmup only |
Even at one mailbox, a full sending platform with warmup included (Smartlead Base, $39) costs $57 a month less than Folderly's yearly-billed warmup-only rate.
10 mailboxes at ~30 sends/day each (≈6,600 sends/month)
| Option | Monthly | Working |
|---|---|---|
| lemlist Email | $69 | 50,000/mo covers 6,600 ✓ ($55 annual) |
| Mailivery Professional | $79 | 800/day pooled = 80/day per mailbox (60 on the page's lower figure) |
| Smartlead Pro | $94 | Base's 6,000/mo is too small; Pro's 90,000 ✓ |
| Instantly Hypergrowth | $97 | Growth's 5,000/mo is too small; Hypergrowth's 125,000 ✓ |
| Saleshandy Pro | $99 | Starter's 6,000/mo is too small; Pro's 100,000 ✓ ($76 annual) |
| Warmup Inbox Basic | $160 | $16 × 10 ($125 annual) |
| MailReach | $195 | $19.50 × 10 ($156 annual) |
| Warmbox | n/a | published tiers cap at 6 inboxes |
| Folderly | $960 (yearly billing) | $96 × 10 |
At ten mailboxes, standalone warmup runs $79 to $960/month and a sequencer that includes warmup runs $69 to $99/month. The cheapest standalone option, Mailivery, lands inside the bundled range, but it buys warmup alone; every bundled price also buys the sending. Ten mailboxes still ramping, and sending under 5,000 a month between them, fit the entry tiers instead: Smartlead $39, Saleshandy $41, Instantly $47.
50 mailboxes at ~30 sends/day each (≈33,000 sends/month)
| Option | Monthly | A year, billed monthly | Working |
|---|---|---|---|
| lemlist Email | $69 | $828 | 50,000/mo covers 33,000 ✓ ($660/yr on annual billing) |
| Smartlead Pro | $94 | $1,128 | Base's 6,000/mo is too small; Pro's 90,000 ✓ |
| Instantly Hypergrowth | $97 | $1,164 | 125,000/mo ✓ |
| Saleshandy Pro | $99 | $1,188 | 100,000/mo and 100-account rotation ✓ ($912/yr on annual billing) |
| Mailivery Business | $199 | $2,388 | 2,500/day pooled = 50/day per mailbox (40 on the page's lower figure) |
| Warmup Inbox Basic | $475 | $5,700 | $9.50 × 50 ($4,500/yr on annual billing) |
| MailReach | $900 | $10,800 | $18 × 50 ($8,640/yr on annual billing) |
| Folderly | $4,800 (yearly billing) | $57,600 | $96 × 50 |
Compare like with like, on annual billing. Folderly's published rate puts warmup alone at $57,600 a year for a 50-mailbox setup. Saleshandy Pro on annual billing is $912 a year and includes the sequencer, the sending and the warmup. That is a 63× difference in the annual bill for a component that, by every vendor's own description, does the same job.
A correction to an earlier draft of this page, stated plainly: it priced this row on Smartlead Base at $39 and said Smartlead published no send ceiling. The pricing page does publish one: 6,000 emails a month on Base. At 33,000 sends the cheapest Smartlead tier that fits is Pro, at $94.
So when does standalone warmup make sense?
Three cases, and they're narrower than the category's marketing implies.
1. You send from something with no warmup. In-house systems, CRM-native senders, platforms you're locked into. This is the genuine buyer, and the one every vendor in the standalone table is actually serving.
2. You want placement testing more than warmup. MailReach's spam tester, Warmy's 500K US seed list, Folderly's Inbox Insights: in that case testing is the product and warmup is attached. Price it as a testing purchase: Folderly's Inbox Insights at $79/mo for 100 tests, or MailReach's extra spam-test credits at $95/mo for 200 or $210/mo for 500, compared against what your sender already bundles.
3. You distrust the bundled pool and want a different one. Defensible as a preference, unverifiable as a decision. No mailbox provider publishes anything about pool quality or pool detection, and every claim you'll read about it comes from a party selling a pool or selling an alternative to one. The honest state of that question.
If none of those apply and you're buying a sender anyway, you have already bought warmup. Smartlead is the one to read closely: its pool is graded by plan, so the warmup on Base is not the warmup on Pro.
And when does no warmup tool make sense?
One or two mailboxes. Ramp by hand over a month with real conversations: better signals, the pool question never arises, and it costs the domain and the mailbox: roughly $7–8 in month one. The day-by-day plan, with copy-paste DNS records.
What none of these prices include
Warmup is the small line. The full deliverability bill:
| Component | Typical cost | Note |
|---|---|---|
| Sending domains | $10–15/yr each | One per 3–5 mailboxes is common practice |
| Mailbox hosting, direct | ~$6–7/user/mo in most regions | Workspace pricing is geo-localised: read at ₹270/user/mo on workspace.google.com/pricing, 29 Sep 2026 [unverified] |
| Mailbox hosting, reseller | $2.50–$4.50/inbox/mo for real Workspace/365 mailboxes | Vendor-reported range [unverified] |
| Email verification | Per record, volume-dependent | Non-negotiable; bounces kill domains faster than anything else |
| Placement testing | Free tier → $79/mo (Folderly Inbox Insights, 100 tests) → $210/mo (MailReach, 500 extra credits) | Often bundled with standalone warmup |
| Warmup | $0 extra when bundled → $4,800/mo (Folderly at 50 mailboxes, yearly billing) | This page |
| Operator time | The largest line, never invoiced | See what's actually automated |
At 50 mailboxes across 12 domains, hosting alone is roughly $125–350/month before anything else. Warmup is rarely the number that decides a stack, which is exactly why the 63× spread above goes unexamined.
Method and limits
Ten vendors, sampled: not the full category. Every figure was read from the vendor's own pricing page on 29 September 2026 with the currency set to US dollars. Where a page offers a billing toggle, both rates were read and the monthly one is used in the tables, with the annual rate alongside. Folderly shows only a yearly-billed rate, so its rows are marked. Where a page contradicts itself (Mailivery's daily volumes), both figures are given. Cost-model rows are arithmetic on those published rates plus the stated tier ceilings; they are not quotes, and enterprise/custom tiers are excluded because they are not published.
Vendor claims about network size, daily limits, simulated response rates, seed lists and detection are reported as claims, attributed, and not verified here. Prices in this category change without notice: re-read the source page before committing.
Not tested: whether any of this works. Warmup effectiveness cannot be credibly measured from outside the mailbox providers, and the parties claiming to measure it are the parties selling it. This page prices the products. It does not endorse the category.