Question 1

Is Inboxlee cheaper than running cold email infrastructure myself?

Accepted Answer

Yes, by a wide margin. Inboxlee is $2.50 per mailbox per month, all in. DIY at scale means a deliverability engineer (loaded cost ~$45K/yr at quarter-time), pooled IP rental, monitoring stack, and ongoing dev maintenance. Our ROI page breaks this down: a 50-mailbox setup costs $125/mo on Inboxlee versus roughly $2,920/mo DIY using public industry rates.

Question 2

What is the difference between Inboxlee and sending tools like Smartlead or Instantly?

Accepted Answer

Inboxlee is the infrastructure layer underneath the sending tool. Smartlead and Instantly send the campaigns; Inboxlee provisions the domains, applies SPF/DKIM/DMARC, spins up Google Workspace or Microsoft 365 mailboxes, and exports them straight into your sending tool in one click. Most teams use both: Inboxlee to build the sending fleet, Smartlead or Instantly to run the campaigns.

Question 3

Why is Inboxlee $2.50 per mailbox when other providers charge $5 to $7?

Accepted Answer

Because we are an official Google Workspace and Microsoft 365 partner, we buy seats at partner pricing and pass the savings directly to you. Generic resellers mark up to $5-7 per seat. We mark up by exactly $1 over the cheapest registrar for domains and run mailboxes at the bare minimum sustainable margin.

Question 4

Can I migrate existing Google Workspace mailboxes to Inboxlee?

Accepted Answer

Yes. We offer free migration concierge for any team moving 25 or more existing mailboxes. We handle the domain DNS verification, mailbox transfer, and authentication setup. The mailboxes keep their existing send history and warmup state - we do not reset anything.

Question 5

Does Inboxlee work with both Gmail and Outlook for cold email?

Accepted Answer

Yes. Google Workspace mailboxes are live today at $2.50/seat/mo. Microsoft 365 mailboxes are in private testing and launching at the same price. Both go through official partner programs so deliverability matches the platform native experience.

Feature	Inboxlee	Generic provider	DIY in-house
Setup time	~2 min wizard, live <30 min	2-6 hours	2-6 weeks
Mailboxes provisioned per session	unlimited	5-20 / batch	1 / hour
Live provisioning (not queued)			depends
Pre-warmed at delivery (skip 14d warmup)
DNS auto-write (SPF · DKIM · DMARC · MX)	4 / 4 automatic	partial	manual
DKIM key strength	2048-bit	1024-bit	you decide
BIMI auto-issue
Domain registration included		separate vendor	separate
Mailboxes-per-domain ceiling enforced	2-3 at checkout	no enforcement	manual
Dedicated sending IPs	included	extra add-on	you procure
Daily blacklist + placement monitoring		weekly
Warmup-day tracking via sender API			manual
One-click export (Smartlead · Instantly · Lemlist · Apollo · Outreach · Reply)		CSV only	CSV only
REST API + webhooks		limited	build it
Credentials delivered via signed link		plaintext email	manual
Migration concierge (25+ mailboxes)	free	paid	N/A
Google + Microsoft official partner		sometimes
Per-mailbox price	$2.50 /seat/mo	$5.00-7.00 /mo	~$50 implied
Billed only once mailbox is live			N/A
Cancel anytime			N/A

The honest comparison page.

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Comparison questions, answered