Warmerly
A free plan with no card and no end date, or a 7-day trial on paid plans, which needs a card.
Warmerly
Warmbox
One-to-one · Free plan or trial
Free plan or trial
One row, in depth: what each tool does, the verified numbers, and who each suits.
Warmbox details read from its pricing, home, features, agency and checker pages and its help centre on 21 October 2026.
Warmerly
A free plan with no card and no end date, or a 7-day trial on paid plans, which needs a card.
Warmbox
No trial on its pricing page; its agency page says "Start your Free Trial. No credit card required". Length not stated.
The short answer
Free plan or trial, in one look.
Warmerly has a free plan with no card and no end date, and a 7-day trial on paid plans that needs a card. Warmbox's pricing page lists no free plan or trial, but its agency page says "Start your Free Trial. No credit card required". The trial length and limits are not stated on the pages we read. Last checked 22 October 2026.
Warmbox
No trial on its pricing page; its agency page says "Start your Free Trial. No credit card required". Length not stated.
The picture
Drawn side by side.
The first eight days
Each lane is one way in. Day 8 is where a Warmerly paid trial turns into a charge.
WarmerlyWarmbox
WarmerlyFree plan: $0, no card, no end date
WarmerlyPaid trial: 7 days, card needed, first charge on day 8
Card needed
WarmboxWarmbox: a free trial, no card, per its agency page. Length not stated
No card
18
Example calendar. Free has no clock. Warmbox's pricing page lists no trial, and we found no length for the one its agency page mentions.
Where each says it
The page that carries the offer
WarmerlyWarmbox
Pricing page and refunds policy
- Free: 1 mailbox, no card
- Paid plans: 7-day trial, card needed
- Payments taken are not refunded, per its refunds policy
Agency page only
- Pricing page: no free plan or trial listed
- Agency page: "No credit card required"
- Length and limits: not stated
Warmbox pages read on 21 October 2026. Terms change, so read each company's own terms before you buy.
How Warmerly does it
Warmerly, in detail.
A free plan that does not expire, and a card-backed 7-day trial on paid plans.
01
Free is a plan, not a countdown
Free costs $0 and needs no card. It has no end date and includes 1 mailbox, 1 active campaign and 100 campaign sends a month.
Warmerly product, checked 21 October 2026
02
The paid trial takes a card
Starter, Growth and Agency start with a 7-day trial. A card is needed to start it, nothing is charged until day 8, and you can cancel before then.
Warmerly product, checked 21 October 2026
03
A sandbox mailbox from signup
Every signup gets a free sandbox mailbox that is already warming, so there is something to see before you connect your own.
Warmerly product, checked 21 October 2026
04
No trial on LinkedIn accounts
A LinkedIn account is $19 a month from the first day.
Warmerly product, checked 21 October 2026
05
Free has no clock
Free includes 1 mailbox, 1 active campaign, 500 leads per campaign, 100 campaign sends a month, 250 email verifications and 3 placement tests a month.
Warmerly product, checked 21 October 2026
06
Trial allowances are Starter's
During a trial, monthly allowances are Starter's whichever tier you trial, while the mailbox and campaign limits are the trialled tier's own.
Warmerly product, checked 21 October 2026
07
One trial per workspace
Each workspace gets one trial. If it has had one before, a later subscription is charged straight away and the card form says so before you confirm.
Warmerly product, checked 21 October 2026
08
Longer trials exist
A visitor who claims the 30-day offer on the site gets 30 days with the first charge on day 31, and an approved Startups application has its own longer trial.
Warmerly product, checked 21 October 2026
09
You can see the end date
The trial end date is in Settings under Billing. If you cancel before it, you are not charged.
Warmerly product, checked 21 October 2026
10
You can skip the trial
In the setup step you can subscribe now instead of taking the trial, and the card is charged immediately.
Warmerly product, checked 21 October 2026
How Warmbox does it
Warmbox, in detail.
A no-card free trial mentioned on one page, and nothing about a trial on the pricing page.
01
Pricing page: none listed
The pricing page lists four plans and no free plan, trial, refund or guarantee.
warmbox.ai/pricing · read 21 October 2026
02
Agency page: a free trial
The agency page carries the line "Start your Free Trial. No credit card required".
warmbox.ai/warmbox-for-agency · read 21 October 2026
03
Cancel from the app
Its help centre says a "Cancel Subscription" button stops the plan. Trials and refunds are not covered in that article.
help.warmbox.ai/en/articles/4803489-manage-my-subscription · read 21 October 2026
04
First results take time
Its pricing FAQ says it usually takes between 15 and 30 days of warming to see first results.
warmbox.ai/pricing · read 21 October 2026
05
The agency page promises a trial
The line reads "Start your Free Trial. No credit card required", next to a sign-up form with a thank-you message.
warmbox.ai/warmbox-for-agency · read 22 October 2026
06
The pricing page has Get Started buttons
Each plan has a Get Started button and the page names no trial, refund or guarantee.
warmbox.ai/pricing · read 22 October 2026
07
How long results take, per its FAQ
The pricing FAQ says it usually takes between 15 and 30 days of warming without any interruption to see first results.
warmbox.ai/pricing · read 22 October 2026
08
How long, per its help centre
A help article says most users see the full benefits within 30 to 50 days, and in some cases up to 90 days.
help.warmbox.ai/en/articles/5103657-how-long-does-it-take-to-warm-up-an-inbox · read 22 October 2026
09
Cancelling
The Cancel Subscription button is under Settings, Billing, Subscriptions. The article says nothing of refunds.
help.warmbox.ai/en/articles/4803489-manage-my-subscription · read 22 October 2026
10
Book a demo
The site navigation offers a Book a demo link next to Get Started.
warmbox.ai · read 22 October 2026
What Warmbox does not say
We looked, and found no statement on these. That is about its published pages only, not about the product.
- The length of the free trial
- What a trial includes or limits
- Any refund or money-back terms
- How many days the free trial lasts
- How many inboxes or emails a trial allows
- Whether the trial turns into a paid plan on its own
- A refund or money-back policy
Where the sources disagree
We report each version rather than pick one.
- Warmbox: the agency page mentions a free trial, while the pricing page lists none.
- Warmbox's pricing page lists no trial, while its agency page offers a free trial with no credit card required.
- Warmbox's pricing FAQ gives 15 to 30 days to first results, while its help article gives 30 to 50 days for the full benefit and up to 90 for new or damaged domains. These are different claims (first results against full benefit) but a reader could take them as one.
The numbers
Only what we could verify.
| Measure | Warmerly | Warmbox |
|---|---|---|
| Free plan or trial | A free plan with no card and no end date, or a 7-day trial on paid plans, which needs a card. | No trial on its pricing page; its agency page says "Start your Free Trial. No credit card required". Length not stated. |
| Free plan | Yes, 1 mailbox, no card | Not listed on its pricing page |
| Card for the free offer | None | "No credit card required" on its agency page |
| Paid-plan trial | 7 days, card needed | Length not stated |
| Time to first results, its own FAQ | Ramp reaches 50 a day on day 30 | 15 to 30 days |
| Free offer, card needed | None | "No credit card required" on the agency page |
| Free offer, length | No end date | Not stated |
| Free offer, mailboxes | 1 | Not stated |
| Paid plan trial, card needed | Yes | Not stated |
| Trial, first charge | Day 8 | Not stated |
| Longer offers | 30-day offer, and a Startups programme | None found |
| Time to first results, pricing FAQ | Ramp reaches 50 a day on day 30 | 15 to 30 days |
| Time to full benefit, help centre | Not stated as a promise | 30 to 50 days, up to 90 |
The plans
Every plan, side by side.
Warmerly
Free$01 mailbox · capped sends · no card
Starter$195 mailboxes · no cap on sends
Growth$4925 mailboxes · no cap on sends
Agency$179100 mailboxes · client workspaces · API
MaxCustomMore than 100 mailboxes
Warmbox
Solo$191 inbox · 50 emails a day · $15 billed yearly
Start-up$793 inboxes · 250 emails a day · $69 billed yearly
Growth$1596 inboxes · 500 emails a day · $139 billed yearly
TeamCustomCustom inboxes · no price shown
Per month, monthly billing. Warmbox shows a yearly price for each of its three plans ($15, $69 and $139) and no price for Team; read on warmbox.ai/pricing on 21 October 2026. Warmerly's email plans cover mailboxes; its LinkedIn add-on is charged per account on top.
In practice
What it means for you.
Our reading of the facts above. Not a promise, and not the only reasonable reading.
Ask before you rely on a Warmbox trial
Its trial appears on one page and is missing from the pricing page. Confirm length and limits when you sign up.
Warmerly's free plan has no clock
You can warm one mailbox for as long as you like. Campaign sends are capped at 100 a month on Free.
Test both before you pay
Warmerly lets you warm one mailbox on Free with no card. Warmbox's trial is on one page only, so ask support for its length before you rely on it.
Do not read a trial as a result
Neither tool promises where your campaign mail will land. Warmbox's own two articles disagree on how long results take.
Set a reminder for day 7 on Warmerly
Paid plans charge on day 8 unless you cancel, and the end date is in billing settings.
Warm one mailbox first
A Warmerly Free mailbox follows the same ramp as a paid one, so you can see the first 30 days before you add more.
Check which plan your trial matches
On Warmerly the trial uses Starter's allowances, whichever tier you trial.
Who it suits
Pick the one that fits.
Warmerly
Warmerly is the better fit if
- You want a plan that does not expire
- You want the free offer written on the pricing page
- You want a free plan that does not expire
- You want the trial terms written down before you give a card
- You want to warm a mailbox for 30 days at no cost to see the ramp
- You want to try campaigns as well as warm-up
- You want a stated first-charge date
Warmbox
Warmbox is the better fit if
- You want a no-card trial of a warmup-only product
- You want to see its dashboard before choosing a plan
- You want a no-card trial of a warm-up only tool and can get its length from support
- You want to look at its dashboard and four recipes before choosing
- You are an agency and the agency page matches your case
- You want a demo call offered on the site
Questions
Does Warmbox have a free trial?
Its pricing page lists none, but its agency page says "Start your Free Trial. No credit card required". Length and limits are not stated.
Does Warmerly have a free plan?
Yes, 1 mailbox with no card and no end date. Paid plans have a 7-day trial that needs a card, with the first charge on day 8.
How soon do results show?
Warmbox says 15 to 30 days. Warmerly's ramp reaches 50 a day on day 30.
Are there longer offers?
Warmerly has a 30-day offer and a Startups programme. We found none on Warmbox.
Sources
- Warmbox pricing
- Warmbox for agencies
- Warmbox help: manage my subscription
- Warmbox help: how long does it take to warm up an inbox
Warmbox pages were read on 21 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
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.