WarmerlyWarmerly ahead on this row
Sequences, pre-launch checks and one reply inbox, with no cap on sends on paid plans.
Warmerly
TrulyInbox
One-to-one · Campaign sending
Campaign sending
One row, in depth: what each tool does, the verified numbers, and who each suits.
TrulyInbox details read from its pricing page, home, features, how-it-works, network, why-trulyinbox and agencies pages, V2 blog post, refund policy, terms, privacy policy, API docs and help centre on 21 October 2026.
Warmerly
Sequences, pre-launch checks and one reply inbox, with no cap on sends on paid plans.
TrulyInbox
No campaign sending found on its pages; it says it works alongside Outreach, Apollo and Lemlist.
The short answer
Campaign sending, in one look.
Warmerly sends campaigns from the mailboxes it warms: sequences, pre-launch checks, limits and one reply inbox. We found no campaign sending on TrulyInbox's pages. It is a warmup tool, its FAQ says it works alongside tools such as Outreach, Apollo and Lemlist, and what it offers around sending is advice, a mailbox calculator and a spam-word checker. Last checked 21 October 2026.
TrulyInbox
No campaign sending found on its pages; it says it works alongside Outreach, Apollo and Lemlist.
The picture
Drawn side by side.
What each covers
From mailbox to what happens next
WarmerlyTrulyInbox
Warmerly
WarmupSequenceSendReply inbox
TrulyInbox
WarmupScoresMonitoringNo sending found
TrulyInbox says it works alongside Outreach, Apollo and Lemlist. We found no sequence builder or reply inbox on its pages.
On screen
What it looks like.
WarmerlySample data
How Warmerly does it
Warmerly, in detail.
Warmup and sending in one place, with guard rails that slow or pause sending before a reputation is lost.
01
Sequences with branches
A sequence has email steps, wait steps, LinkedIn 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 builds branches.
Warmerly product, checked 21 October 2026
02
Checks before Start
A readiness check blocks a launch with no usable step, no sender or no queued leads. It warns about DNS problems on a sender, more than five senders on one domain, spam-style copy and a missing unsubscribe tracking domain, and asks you to acknowledge warnings once.
Warmerly product, checked 21 October 2026
03
Limits per mailbox
Each mailbox has a daily campaign limit, 30 by default. A volume ramp starts at 3 emails per mailbox on day 1 and adds 1 a sending day up to 15 by default, switched on automatically when mailboxes are young.
Warmerly product, checked 21 October 2026
04
Brakes on bounces
A mailbox is scaled down once its seven-day bounce rate passes 2%, and a campaign pauses at 7% bounces or 30% undeliverable leads, each after at least 25 sends. A mailbox taken off campaigns keeps warming and returns by itself after at least 3 days with a score of 70 or more.
Warmerly product, checked 21 October 2026
05
One reply inbox
Connected mailboxes sync every five minutes. Replies land in one inbox with LinkedIn replies, and a genuine reply stops that lead's sequence by default.
Warmerly product, checked 21 October 2026
06
No cap on sends on paid plans
Starter, Growth and Agency send without a monthly meter, and each mailbox stays inside its own daily limit. Free is capped at 100 campaign sends a month.
Warmerly product, checked 21 October 2026
How TrulyInbox does it
TrulyInbox, in detail.
A warmup product that stops before the send button, with guidance on how to run outreach beside it.
01
No sending product found
The home, features, how-it-works, pricing and agencies pages describe warmup, scores and monitoring. We found no sequence builder, lead list, campaign launch or reply inbox on any of them.
trulyinbox.com/features · read 21 October 2026
02
It says it works alongside sending tools
The FAQ says TrulyInbox works with tools such as Outreach, Apollo and Lemlist. The pages describe this as compatibility, not a formal integration, and name no connector.
trulyinbox.com · read 21 October 2026
03
Keep warmup running while you send
A help article says not to stop warm-up once outreach starts: lower the daily campaign sending limit and keep warm-up running in the background. It says warm-up is not a one-time setup.
support.trulyinbox.com/en/articles/8915618-how-much-time-should-i-enable-email-warmup · read 21 October 2026
04
Do not start outreach too early
It recommends avoiding parallel outreach for the first two to three weeks and says new domains should warm for at least 3 to 4 weeks, established ones 2 to 3. Its refund terms add that outreach before Ready for Outreach shows breaks its warm-up practice.
support.trulyinbox.com/en/articles/12928498-why-emails-land-in-spam-even-during-warm-up; https://www.trulyinbox.com/refund-policy · read 21 October 2026
05
Planning tools
A mailbox calculator turns a daily volume into mailboxes using 40 emails per mailbox by default and a 20% warmup buffer. A spam checker scores subject lines and bodies out of 100 against a list of 466 terms.
trulyinbox.com/free-tools/mailbox-calculator/; https://www.trulyinbox.com/free-tools/spam-checker · read 21 October 2026
06
An API that other tools can call
The API is for automating warmup triggers, pulling warmup data and connecting to sales tools. It controls warmup and reads reports, not campaigns.
dev.trulyinbox.com · read 21 October 2026
What TrulyInbox does not say
We looked, and found no statement on these. That is about its published pages only, not about the product.
- A sequence builder, lead import, campaign scheduler or unsubscribe handling
- A named integration with Outreach, Apollo or Lemlist beyond the compatibility statement
- A reply inbox or reply detection
- Any plan tier that includes sending
Where the sources disagree
We report each version rather than pick one.
- The spam checker's introduction refers to 200+ words while its own table gives 466 terms. We use the table.
- The mailbox calculator treats warmup as spare mailboxes, a 20% buffer, while its common-mistakes text says warmup emails count towards daily sending volume. The page does not reconcile the two.
The numbers
Only what we could verify.
| Measure | Warmerly | TrulyInbox |
|---|---|---|
| Campaign sending | Sequences, pre-launch checks and one reply inbox, with no cap on sends on paid plans. | No campaign sending found on its pages; it says it works alongside Outreach, Apollo and Lemlist. |
| Default daily campaign limit per mailbox | 30 | Not applicable |
| Volume ramp, first day | 3 per mailbox | Not applicable |
| Campaign pause on bounces | 7% | Not applicable |
| Cold emails per mailbox in its calculator | 30 by default | 40 by default |
| Free plan sends | 100 a month | Not applicable |
In practice
What it means for you.
Our reading of the facts above. Not a promise, and not the only reasonable reading.
This is a different category of tool
TrulyInbox warms. Warmerly warms and sends. If you already have a sending tool you like, the real comparison is between the two warmup halves, and the rows above that compare warmup are the ones that matter.
Do not run two warmups under one sender
TrulyInbox's help says running several tools in parallel sends conflicting signals. If another tool also warms your mailbox, pick one warmup and turn the other off before you add Warmerly campaigns.
Both advise a low campaign volume at first
TrulyInbox says to lower the campaign limit while warm-up runs. Warmerly sets one for you: 3 a day per mailbox on day one for a young mailbox, rising by 1 a sending day to 15 by default.
Its calculator and ours agree roughly
TrulyInbox's default is 40 cold emails per mailbox a day and calls 30 to 50 standard. Warmerly's default campaign limit is 30. Both are settings you can change for yourself.
Count the second subscription
If you use TrulyInbox for warmup you will pay a separate sender such as Outreach, Apollo or Lemlist as well. Whether that costs more than one Warmerly plan depends on that tool's price, which we do not quote.
Warmerly lets you launch early, gently
A campaign can start on the day you connect a mailbox, with a volume ramp that holds a young mailbox to 3 sends a day. TrulyInbox's advice is to wait. Both are trying to protect the same reputation, by different routes.
Who it suits
Pick the one that fits.
Warmerly
Warmerly is the better fit if
- You want to warm and send from the same mailboxes
- You want pre-launch checks and automatic brakes on bounces
- You want LinkedIn steps in the same sequence as email
- You want one reply inbox for every mailbox
TrulyInbox
TrulyInbox is the better fit if
- You already have a sending tool you want to keep
- You only want warmup and its monitoring
- You want its mailbox calculator and spam-word checker for planning
- You want an API that controls warmup from your own code
Questions
Does TrulyInbox send cold emails?
We found no campaign sending on its pages. It describes itself as a warmup platform and says it works alongside tools such as Outreach, Apollo and Lemlist.
Can I use TrulyInbox with Warmerly's campaigns?
Yes, if only one tool warms the mailbox. Pause warmup on that mailbox in Warmerly and let TrulyInbox warm it, and keep campaign volume low at first.
Does Warmerly limit how many emails I send?
Paid plans have no monthly send meter. Each mailbox has its own daily limit, 30 by default, and brakes slow or pause it on high bounces. Free is capped at 100 campaign sends a month.
Should I stop warmup when campaigns start?
No, on either. TrulyInbox's help says to keep it running in the background and lower the campaign limit. Warmerly keeps warmup running beside campaigns.
What does TrulyInbox's spam checker do?
It scores pasted email text out of 100 and lists flagged words with suggested replacements. It checks wording only, and says that fixing trigger words does not guarantee inbox delivery.
Sources
- TrulyInbox home page
- TrulyInbox features page
- TrulyInbox help: how much time to enable warmup
- TrulyInbox help: why emails land in spam
- TrulyInbox mailbox calculator
- TrulyInbox spam checker
- Warmerly launch checks
TrulyInbox 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)
- Pricing model
- Cost as you add mailboxes
- Free plan, trial and refunds
- Daily warmup volume
- Warmup strategies and controls
- Warmup network size
- Spam rescue
- Health score and readiness
- Authentication and blocklists
- Supported mailboxes
- API access
- Agencies and teams
- Hosting and security
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.