Puzzle Inbox

Pre-warmed Google and Microsoft mailboxes with published warmup periods.

From $0.35/inbox

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Bottom line

Pre-warmed Google and Outlook inboxes for cold email. Outlook starts at $0.35 per inbox. Google starts at $3.

Stands out for: Outlook 365 inboxes at $0.35 each with 100 inboxes per domain, sold beside Google at $3.

Watch out for: Outlook allows only 3 emails per inbox per day. Google is 12 per day and 3 inboxes per domain. Delivery takes 24 to 72 hours.

Overview

Puzzle Inbox sells pre-warmed Google Workspace and Outlook 365 inboxes for cold email. Google Standard is $3 per inbox, or $4.50 warmed, with 3 inboxes per domain and 12 emails per inbox per day. Outlook Standard is $0.35 per inbox, or $0.50 warmed, with 100 inboxes per domain and 3 emails per inbox per day. DNS is configured. Delivery is 24 to 72 hours. Done-for-you bundles start at 100 mailboxes and 33 domains for Starter, then Growth and Scale steps.

Volume senders pick Outlook at $0.35 when they will spread sends across many inboxes. Google costs more per inbox but allows more daily sends. Warmup is a higher-priced SKU, not a free extra. There is no printed free trial. The $0.35 Outlook rate is the cheapest way in. Done-for-you plans still bill you for the tools underneath.

Who it's for

Best for

Teams that want cheap Outlook inboxes at volume
Senders who will spread volume across many inboxes
Buyers who want DNS already configured
Shops considering a done-for-you mailbox bundle

Not ideal for

Senders who need 20-plus emails per inbox per day
Teams that must have Google-only infrastructure

Key features

Google Workspace. Official Google Workspace mailbox provisioning for outbound sending.

Microsoft 365. Official Microsoft 365 / Outlook mailbox provisioning for outbound sending.

Pre-warmup. Markets 4 to 12 week pre-warmup before delivery.

Pricing

Starting price $0.35/inbox

Free tier –

Plan	Price	What you get
Outlook 365 Standard	$0.35/inbox	$0.50 warmed, 100 inboxes per domain, 3 emails per inbox a day
Google Workspace Standard	$3/inbox	$4.50 warmed, 3 inboxes per domain, 12 emails per inbox a day

Outlook 365 Standard is $0.35/inbox ($0.50 warmed), 100 inboxes per domain, 3 emails/inbox/day. Google Workspace Standard is $3/inbox ($4.50 warmed), 3 inboxes per domain, 12 emails/inbox/day. Delivery 24-72 hours. Done-for-you Starter/Growth/Scale bundles listed without printed bundle totals. Confirm current terms on the vendor site.

Checked 19 Sep 2026. Vendors change prices without notice.

See current pricing on Puzzle Inbox (opens in a new tab)

Is Puzzle Inbox expensive?

Puzzle Inbox starts at $0.35/inbox. We list 36 deliverability tools in total. 4 have a free tier, and those with a public price typically start around $10 a month.

1 quote-based
4 free tier
35 public price

Worked out automatically from every deliverability listing, so it updates as the directory changes.

Pros and cons

Pros

Outlook inboxes from $0.35 each
Pre-warmed Google option at $3
DNS configured for you

Cons

Outlook capped at 3 emails/day
24-72 hour delivery window
No published free trial

What's new at Puzzle Inbox

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How Puzzle Inbox compares

See all Puzzle Inbox alternatives, with what each one does differently and a head to head for every pairing.

Tool	Free tier	From	MCP	API	Compare
Puzzle Inbox (this tool)	–	$0.35/inbox	–	–
Hypertide Entra/Outlook-style domains at $25 with 25 inboxes included.	–	$3.30/inbox/mo	–	✓	Compare
Zapmail Google and Microsoft reseller mailboxes from $39/mo.	–	$39/mo	–	✓	Compare
Maildoso SMTP at $2.50 per mailbox if you skip Outlook UI.	–	$75/mo	✓	✓	Compare
Cheap Inboxes Google and Microsoft inboxes from $3.50 with admin access.	–	$3.50/mailbox/mo	✓	✓	Compare

Hypertide

$3.30/inbox/mo API

Entra/Outlook-style domains at $25 with 25 inboxes included.

View listing Compare with Puzzle Inbox

Zapmail

$39/mo API

Google and Microsoft reseller mailboxes from $39/mo.

View listing Compare with Puzzle Inbox

Maildoso

$75/mo MCP API

SMTP at $2.50 per mailbox if you skip Outlook UI.

View listing Compare with Puzzle Inbox

Cheap Inboxes

$3.50/mailbox/mo MCP API

Google and Microsoft inboxes from $3.50 with admin access.

View listing Compare with Puzzle Inbox

Your next step

Shortlisting Puzzle Inbox?

ComparePuzzle Inbox vs HypertidePrice, free tier, MCP and API side by side, on one page.Free toolSPF, DKIM and DMARC checkerType a domain to see if MX, SPF, DKIM and DMARC are set up for cold email, with the fix for anything missing.Ready?Visit Puzzle InboxSee current plans and pricing on the vendor site. (opens in a new tab)

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Frequently asked questions

What is Puzzle Inbox?

Pre-warmed Google and Microsoft mailboxes with published warmup periods. Markets 4 to 12 week pre-warmup before delivery. Puzzle Inbox is listed under Deliverability in the Work Insiders directory.

Is Puzzle Inbox free?

No. Puzzle Inbox is a paid product.

Does Puzzle Inbox have an MCP server or API?

No. Puzzle Inbox does not currently list an MCP server or a public API.

What are alternatives to Puzzle Inbox?

Puzzle Inbox alternatives worth comparing are Hypertide, Zapmail, Maildoso and Cheap Inboxes. The comparison table above shows free tier, starting price, MCP and API side by side.