Warmerly
Runs on Warmerly's servers: a web app, plus an Android app installed directly. Nothing to keep open.
Warmerly
Dux-Soup
One-to-one · Local app or cloud
Local app or cloud
One row, in depth: what each tool does, the verified numbers, and who each suits.
Dux-Soup details read from its pricing page, home page, integrations and feature pages and help centre on 22 October 2026.
Warmerly
Runs on Warmerly's servers: a web app, plus an Android app installed directly. Nothing to keep open.
Dux-Soup
STACKED local is a Mac and Windows desktop app on your machine; STACKED cloud runs on its infrastructure.
The short answer
Local app or cloud, in one look.
Warmerly has no desktop app. It runs warmup and sending on its own servers, with a web app and an Android app. Dux-Soup gives a choice: STACKED local, a Mac and Windows desktop app on your own machine, or STACKED cloud, which runs on its infrastructure and keeps campaigns going when your computer is off. Last checked 22 October 2026.
Dux-SoupDux-Soup ahead on this row
STACKED local is a Mac and Windows desktop app on your machine; STACKED cloud runs on its infrastructure.
The picture
Drawn side by side.
Where the work happens
From each side's own description
WarmerlyDux-Soup
Warmerly
You open the web appWarmerly's servers run warmup and sendingYour mailboxes and LinkedIn accounts
Dux-Soup
STACKED local: your own machineSTACKED cloud: its infrastructureAlways on in cloud only
Dux-Soup's pages list what cloud adds and do not say what local cannot do when the computer is off. Warmerly's LinkedIn runs through a hosted provider.
What you get
As each side lists it
WarmerlyDux-Soup
WarmerlyWarmerly
- Web appYes
- Android appInstalled directly
- Desktop appNo
- Runs with your computer offYes
Dux-SoupDux-Soup
- Desktop appMac and Windows
- STACKED local$55 a seat a month
- STACKED cloud$99 a seat a month
- Runs with your computer offCloud only
Dux-Soup's servers are managed by Elastx AB, which is ISO 27001 certified, per its security policy. Where its data is stored is not stated.
How Warmerly does it
Warmerly, in detail.
Warmerly runs as a web app. Its warmup, campaign and background workers run on its own servers, so nothing has to stay open on your computer.
01
Warmup and sending run on Warmerly's servers
Production runs a web process and separate warmup, campaigns, verify, whatsapp and cron processes, so warmup and sending continue when your browser is closed.
Warmerly product, checked 22 October 2026
02
A web app and an Android app
The dashboard is a web app. The Android app is installed directly rather than from a store.
Warmerly product, checked 22 October 2026
03
LinkedIn goes through a hosted provider
A LinkedIn account connects through a hosted third-party service, LinkupAPI, so it can show as disconnected when that service has a problem.
Warmerly product, checked 22 October 2026
04
Where Warmerly has no equivalent
There is no desktop app and no way to run Warmerly's LinkedIn activity from your own machine.
Warmerly product, checked 22 October 2026
05
Mailbox health is checked from the server side
SPF, DKIM, DMARC and MX are re-checked every 6 hours for each connected domain, whether or not anyone has the app open.
Warmerly product, checked 22 October 2026
06
Reconnecting LinkedIn is done by adding it again
A disconnected LinkedIn account is reconnected from Accounts by adding it again, because the hosted provider keeps no password Warmerly can sign in with.
Warmerly product, checked 22 October 2026
07
A public status page
Warmerly's status page probes each component, including mail health between its own mail servers, and opens incidents automatically. Dux-Soup's cloud article, by contrast, states no uptime or service commitment, so there is nothing equivalent to compare on its side.
Warmerly product, checked 22 October 2026
How Dux-Soup does it
Dux-Soup, in detail.
Dux-Soup sells the same product in two places to run it.
01
STACKED local
Per its pricing page it 'runs on your own machine, desktop app (Mac/Win)' at $55.00 a month per seat, or $41.25 billed annually.
dux-soup.com/pricing · read 22 October 2026
02
STACKED cloud
It 'runs on our infrastructure, managed and monitored', at $99.00 a month per seat, or $74.17 billed annually, and campaigns run continuously without a machine left on.
dux-soup.com/pricing · read 22 October 2026
03
Cloud keeps working with the computer off
Its help article says campaigns keep running when STACKED is closed or your computer is off.
support.dux-soup.com/article/829-why-choose-stacked-cloud · read 22 October 2026
04
An admin dashboard on cloud
The article says you can manage unlimited accounts from a single Admin dashboard, with fixed seats paid upfront and flexible seats billed on usage for plans with more than 5 seats.
support.dux-soup.com/article/829-why-choose-stacked-cloud · read 22 October 2026
05
Who runs its servers
Its security policy says Dux-Soup servers are managed by Elastx AB, which is ISO 27001 certified. The policy was last updated on 4 December 2023.
support.dux-soup.com/article/223-dux-soup-security-policy · read 22 October 2026
06
A web app and browser extension
Its help centre lists a web app and browser extension as an alternative setup.
support.dux-soup.com · read 22 October 2026
07
Mac and Windows installers
The get-stacked page offers a Windows installer and two Mac installers, for Apple Silicon and Intel.
dux-soup.com/get-stacked · read 22 October 2026
08
A browser dashboard as well
The pricing page lists dashboard access via a browser alongside the client app installed on your computer.
dux-soup.com/pricing · read 22 October 2026
09
Fixed and flexible seat plans on cloud
The cloud article describes fixed seats paid in advance and flexible seats billed on usage, with flexible available only on plans with more than 5 seats.
support.dux-soup.com/article/829-why-choose-stacked-cloud · read 22 October 2026
10
A sub-processor list exists
The help centre lists a Privacy policy, 'Are we GDPR compliant?' and a List of sub-processors, which we did not read.
support.dux-soup.com · read 22 October 2026
11
Server hosting is named
The security article says its servers are managed by Elastx AB, and last updated on 4 December 2023.
support.dux-soup.com/article/223-dux-soup-security-policy · read 22 October 2026
What Dux-Soup does not say
We looked, and found no statement on these. That is about its published pages only, not about the product.
- Where its data is stored
- Encryption in transit or at rest
- How a LinkedIn session or IP address is handled on cloud
- What local cannot do when the computer is off, since the pages list what cloud adds
- Where cloud sessions run and which IP addresses LinkedIn sees
- Uptime commitments for cloud
The numbers
Only what we could verify.
| Measure | Warmerly | Dux-Soup |
|---|---|---|
| Local app or cloud | Runs on Warmerly's servers: a web app, plus an Android app installed directly. Nothing to keep open. | STACKED local is a Mac and Windows desktop app on your machine; STACKED cloud runs on its infrastructure. |
| Where it runs | Warmerly's servers | Your machine on local, its infrastructure on cloud |
| Desktop app | No | Yes, Mac and Windows |
| Keeps running with your computer off | Yes | On cloud only |
| Entry price | $19 a month on Starter | $55 a seat a month on local, $99 on cloud |
| Mobile app | Android, installed directly | Not stated |
| Always-on automation | Yes, all work runs on its servers | On cloud only |
| Browser access | The whole app is in the browser | A dashboard, plus the desktop client on local |
| Seat billing options on cloud | One plan price | Fixed prepay, or flexible post-pay above 5 seats |
In practice
What it means for you.
Our reading of the facts above. Not a promise, and not the only reasonable reading.
Local depends on your computer
Its pages say local runs on your machine, so a closed or sleeping computer is a question to ask.
Cloud costs more per seat
$99 a month against $55 on monthly billing.
Warmerly never needs your machine
Warmup and sending run on its servers.
Closing the laptop on Friday
On Warmerly, warmup and scheduled sends continue, and LinkedIn actions dispatch every minute from its own worker. On Dux-Soup local the desktop app has to be running, so Friday's queue waits until Monday. On cloud it carries on.
Travelling with a work laptop
The local app runs on one machine, so a second computer needs its own setup and a seat. On cloud you start campaigns from anywhere. Warmerly needs only a browser.
A team of six
Six cloud seats are $594 a month at the monthly price, and since the flexible billing option starts above 5 seats, six is the first size where it applies (our arithmetic).
Choosing for control
Local runs on your own machine. Cloud and Warmerly run on someone else's servers. Choose by where you want the automation to run.
What to check when something is down
Warmerly shows component status publicly. For Dux-Soup cloud, ask support how outages are announced, since its cloud article says only that infrastructure is managed and monitored.
Who it suits
Pick the one that fits.
Warmerly
Warmerly is the better fit if
- You want nothing to keep open on your computer
- You want warmup and sending to run all day
- You do not need a desktop app
- You want nothing to install and nothing to keep open
- You would like email and LinkedIn in one web app
- You want server-side checks that run on a schedule
Dux-Soup
Dux-Soup is the better fit if
- You want the option of running on your own machine
- You want a managed cloud that you can choose per seat
- You manage many accounts from one Admin dashboard
- You want LinkedIn activity to run from your own computer
- You want an always-on cloud option as well
- You want a Mac or Windows desktop app
Questions
Does Dux-Soup run in the cloud?
Yes, on STACKED cloud at $99 per seat a month, or $74.17 billed annually. STACKED local at $55 per seat a month runs on your own Mac or Windows machine.
Does Warmerly need to be left running on my computer?
No. Warmup and sending run on Warmerly's servers. There is a web app and an Android app.
Do I need to install anything for Warmerly?
No. It runs in the browser. An Android app can be installed directly.
Can Dux-Soup run without my computer on?
On STACKED cloud, yes. On local, the desktop app has to be running.
Where does Dux-Soup host its servers?
Its security article says they are managed by Elastx AB. It does not say where the data sits.
Sources
- Dux-Soup pricing
- Help: why choose STACKED cloud
- Help: security policy
- Dux-Soup help centre
- Dux-Soup get STACKED
Dux-Soup pages were read on 22 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.