Head to head

Hypertide vs Puzzle Inbox

Same facts, side by side: starting price, free tier, MCP, API and what each one is actually built for.

Hypertide

$3.30/inbox/mo

Google, Microsoft, and Entra inboxes for cold email. Google inboxes are $3.30 each per month with no minimum.

Where Hypertide fits

Teams that want one Google inbox or ten thousand at the same rate
Agencies buying Entra domains at $25 for 25 inboxes
Senders exporting over OAuth or SMTP to Instantly or Smartlead
Shops that want API access and unlimited seats included

Puzzle Inbox

$0.35/inbox

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

Where Puzzle Inbox fits

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

At a glance

Detail	Hypertide	Puzzle Inbox
Starting price	$3.30/inbox/mo	$0.35/inbox
Free tier	–No	–No
MCP server	–No	–No
Public API	✓Yes	–No
Listed under	Deliverability	Deliverability

Where they pull apart

Hypertide

Stands out: Flat $3.30 per Google inbox, no packages, plus Entra domains at $25 with 25 inboxes included.

Watch out: No free trial. Entra is the volume SKU; Google is per inbox. Month-to-month, cancel in the app.

Not the right fit for

Buyers who want a free trial before the first inbox
Teams that only want cheap shared SMTP under $1

Puzzle Inbox

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

Watch out: 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.

Not the right fit for

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

Pros and cons

Hypertide

$3.30/inbox/mo, no minimum
API and unlimited seats included
Entra domains at $25 for 25 inboxes

No free trial
Not a sub-$1 SMTP shop
Entra and Google are separate SKUs

Puzzle Inbox

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

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

What each one costs

Hypertide

$3.30/inbox/mo

Google inboxes $3.30/inbox/month with no minimum. Entra domains $25/domain/month including 25 inboxes. API, unlimited seats, Relay, Layover, and DNS included. No free trial. Month-to-month, cancel in the app. Confirm current terms on the vendor site.

Checked 19 Sep 2026

Puzzle Inbox

$0.35/inbox

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

Common questions

Is Hypertide cheaper than Puzzle Inbox?

Puzzle Inbox starts lower, at $0.35/inbox against $3.30/inbox/mo for Hypertide. That is the entry plan on each side, so the real number depends on seats and the tier you land on.

Can you try Hypertide or Puzzle Inbox for free?

Neither carries a free tier on our listing.

Not the pair you wanted?

All Hypertide alternatives All Puzzle Inbox alternatives Every Deliverability tool

Editorial listings, never paid rankings. Prices checked 19 Sep 2026. Confirm current terms on the vendor site. Spot an error?