Warmerly
A test per mailbox; accuracy is limited, with no dedicated Gmail or Outlook seed list yet
Warmerly
lemlist
One-to-one · Inbox placement tests
Inbox placement tests
One row, in depth: what each tool does, the verified numbers, and who each suits.
lemlist details read from its pricing page, home page and help centre on 21 October 2026.
Warmerly
A test per mailbox; accuracy is limited, with no dedicated Gmail or Outlook seed list yet
lemlist
Tests at 100 credits each, with results by provider
The short answer
Inbox placement tests, in one look.
lemlist runs inbox placement tests inside its Deliverability Hub at 100 credits each, with results by provider, and advises 1 to 2 a month. Warmerly has a placement test per mailbox, but it has no dedicated Gmail or Outlook seed list yet, so most tests run against its own warmup pool and are less accurate. lemlist is ahead here. Last checked 21 October 2026.
lemlistlemlist ahead on this row
Tests at 100 credits each, with results by provider
The picture
Drawn side by side.
What each placement test is
Where the test mail goes and what you get back
Warmerlylemlist
A test on each mailbox
- Up to 4 targets
- Inbox 100, promotions 60, spam 10, missing 0
- Limited accuracy: no dedicated seed list yet
A test for 100 credits
- 100 credits a test
- 1 to 2 tests a month advised
- Inbox, tabs, spam or missing, by provider
Warmerly's own page tells you when a run was degraded. We found nothing on how lemlist picks its test inboxes.
On screen
What it looks like.
WarmerlySample data
How Warmerly does it
Warmerly, in detail.
A placement test per mailbox, with limited accuracy until real seeds exist. Warmerly labels a test run against its own pool as such and keeps it out of health scores.
01
What a test does
It sends one message to up to 4 targets, 2 on the same provider and 2 on another, and after a short wait checks INBOX, Promotions, Spam and Junk over IMAP. Inbox scores 100, promotions 60, spam 10 and missing 0, averaged.
Warmerly product, checked 21 October 2026
02
How long it takes
A test started from the dashboard waits a fixed 30 seconds before reading the targets, so a run with four targets takes about 45 to 60 seconds. The result is stored even if you close the page.
Warmerly product, checked 21 October 2026
03
No dedicated seed list yet
Real measurement needs seed mailboxes at Gmail, Outlook or Yahoo. On 15 October 2026 the table that holds them had never held a real row in production, so tests fall back to Warmerly's own pool.
Warmerly product, checked 21 October 2026
04
A degraded run is labelled and contained
Warmerly's own pool mailboxes accept almost everything, so a run against them scores near 100 whatever the sender's reputation. The account page shows a Limited accuracy note, and such a run never writes health data, never feeds the spam score and never raises the mailbox's sending quota.
Warmerly product, checked 21 October 2026
05
A second source of real targets, switched off
Code exists to use consenting Gmail and Outlook mailboxes of other customers in the warmup network as targets. Its switch is off by default and the document says it has not been run against production.
Warmerly product, checked 21 October 2026
06
How many
Monthly test allowances are 3 on Free, 5 on Starter, 25 on Growth and 100 on Agency. A daily sweep tests up to 5 mailboxes and skips any mailbox tested in the last 24 hours.
Warmerly product, checked 21 October 2026
How lemlist does it
lemlist, in detail.
Tests are run on demand from the Deliverability Hub and cost credits. The article treats placement as the main reputation signal once campaigns are live.
01
Cost and frequency
Each inbox placement test costs 100 credits. The article advises 1 to 2 tests a month, no more, because weekly testing mostly shows normal day to day variation.
help.lemlist.com/en/articles/13751256-monitor-deliverability-with-lemlist-deliverability-hub · read 21 October 2026
02
How you run one
Click Run inbox placement test, choose a sender that is really sending, optionally attach a campaign and step, add a subject and content or let lemlist fill them from the step, confirm 100 credits are available, and run it.
help.lemlist.com/en/articles/13751256-monitor-deliverability-with-lemlist-deliverability-hub · read 21 October 2026
03
Results
Results show inbox, tabs, spam or missing, by provider such as Google, Microsoft and SMTP/IMAP, typically ready within a few minutes. The table lists date, campaign, step, user, mailbox, lead test data, score and source.
help.lemlist.com/en/articles/13751256-monitor-deliverability-with-lemlist-deliverability-hub · read 21 October 2026
04
Reading a result
If Google and Microsoft look fine but SMTP lands in spam, the article points at content rather than infrastructure. If several providers are affected it suggests reviewing sender reputation, domain health and content, and lowering volume.
help.lemlist.com/en/articles/13751256-monitor-deliverability-with-lemlist-deliverability-hub · read 21 October 2026
05
A fallback
If you do not run tests, keep lemwarm at 10 a day. One of the two must always be in place, per the article.
help.lemlist.com/en/articles/13751256-monitor-deliverability-with-lemlist-deliverability-hub · read 21 October 2026
06
Credits and what they buy
The pricing page lists a lead data enrichment add-on of 2,000 credits a month for $20 monthly ($16 yearly), which it describes as 400 emails or 100 phone numbers. The FAQ says credits pay for data features and roll over while the subscription is active. How many credits each plan includes is not stated.
lemlist.com/pricing · read 21 October 2026
07
Hub availability
The Deliverability Hub, where tests are run, is included in all plans and in the free trial. Running a test needs at least 100 credits.
help.lemlist.com/en/articles/13751256-monitor-deliverability-with-lemlist-deliverability-hub · read 21 October 2026
What lemlist does not say
We looked, and found no statement on these. That is about its published pages only, not about the product.
- How lemlist picks its test inboxes, and the accuracy of its results.
- How many inboxes or recipients one test uses.
- How many credits each plan includes, and the price of a credit outside the add-on bundle.
- Which providers are covered beyond Google, Microsoft and SMTP/IMAP.
The numbers
Only what we could verify.
| Measure | Warmerly | lemlist |
|---|---|---|
| Inbox placement tests | A test per mailbox; accuracy is limited, with no dedicated Gmail or Outlook seed list yet | Tests at 100 credits each, with results by provider |
| Cost of a test | Counts against a monthly allowance | 100 credits |
| Tests a month, entry paid plan | 5 on Starter | 1 to 2 advised |
| Results shown by | Averaged score | Provider |
| Targets per test | Up to 4 | Not stated |
| Time to a result | About 45 to 60 seconds | A few minutes |
| Tests a month on Growth | 25 | 1 to 2 advised |
| Dedicated seed list | Not yet | Not stated |
In practice
What it means for you.
Our reading of the facts above. Not a promise, and not the only reasonable reading.
Reading a result
Treat a Warmerly test as a rough check. A degraded run never changes health, and the account page says Limited accuracy.
Credits
lemlist's tests spend the same credits as enrichment, so frequent testing has a cost.
What 100 credits is worth
At the enrichment add-on's list rate of $20 for 2,000 credits, 100 credits is $1.00, so the advised 1 to 2 tests a month is $1 to $2 of credits, or 100 to 200 of the 2,000. That is arithmetic on a different product's price, since lemlist does not say what credits cost on the plan itself. The honest cost of a test is small. The question is whether the result is worth reading.
Scoring a sample by hand
Suppose a Warmerly test with four targets finds two messages in the inbox, one in Promotions and one in spam. The score is (100 + 100 + 60 + 10) divided by 4, which is 67.5. That is one average, so it cannot show that Gmail was fine and Outlook was not. lemlist's per provider breakdown can, which is the main reason it is ahead on this row.
Why the score near 100 means little
Warmerly's warmup pool mailboxes accept almost everything, so a degraded test returns about 100 even for a sender with a poor reputation. The Limited accuracy note is there for that reason. Until seeds at the big providers exist, use the result to confirm that sending works, not to prove inbox placement.
How often to test
lemlist says 1 to 2 a month, no more. Warmerly's allowance is 5 a month on Starter and 25 on Growth, and a daily sweep also tests up to 5 mailboxes. More tests are possible on Warmerly, but with a pool that is mostly its own, more tests do not add much information.
Who it suits
Pick the one that fits.
Warmerly
Warmerly is the better fit if
- You want a free check built into the mailbox page, and accept its limits.
- You want placement kept out of automatic stops.
- You want a quick sanity check that sending works, repeated as often as your allowance permits.
- You would rather not spend credits to test.
lemlist
lemlist is the better fit if
- You want results by provider and are happy to spend credits.
- You want placement trends beside bounce and spam data.
- You want to attach a test to a campaign step and test the content you actually send.
- You want a documented routine for how often to test.
Questions
How accurate is Warmerly's placement test?
Limited for now: with no dedicated Gmail or Outlook seed list it tests against Warmerly's own warmup pool, and the page says so. lemlist's tests cost 100 credits and report by provider.
Does a Warmerly placement test change my sending limits?
A run against Warmerly's own pool never does: it does not write health data and cannot raise the quota. A run against real seeds would feed the spam score, which can lower a mailbox's warmup quota.
How much does a lemlist placement test cost?
100 credits each, per its Deliverability Hub article, which advises 1 to 2 a month. It does not say how many credits each plan includes.
How long does a placement test take?
On Warmerly about 45 to 60 seconds from the dashboard. In lemlist results are typically ready within a few minutes and show Pending until then.
Which providers does lemlist report?
The article names Google, Microsoft and SMTP/IMAP, and for each whether the message landed in the inbox, the tabs, spam or went missing. It does not list others.
Sources
lemlist 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
- All features
- Starting price (per month)
- LinkedIn and email in one sequence
- What the price scales with
- Emails per month
- Senders or mailboxes
- Daily sending limits
- Lead database
- Personalisation
- Calling, SMS and WhatsApp
- Email warmup
- SPF, DKIM and DMARC monitoring
- LinkedIn account warmup
- Shared inbox
- CRM and integrations
- 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.