Compare/Alternatives

Puzzle Inbox alternatives

4 tools our write-ups put next to Puzzle Inbox, with starting price, free tier, MCP and API side by side.

Puzzle Inbox from $0.35/inbox

Closest alternatives

The short answer

Hypertide : Entra/Outlook-style domains at $25 with 25 inboxes included. From $3.30/inbox/mo
Zapmail : Google and Microsoft reseller mailboxes from $39/mo. From $39/mo
Maildoso : SMTP at $2.50 per mailbox if you skip Outlook UI. From $75/mo
Cheap Inboxes : Google and Microsoft inboxes from $3.50 with admin access. From $3.50/mailbox/mo

Why people look past Puzzle Inbox

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.

What we noted

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

Not the right fit for

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

Worth keeping in mind: Outlook 365 inboxes at $0.35 each with 100 inboxes per domain, sold beside Google at $3.

Puzzle Inbox alternatives compared

Tool	Free tier	From	MCP	API	Head to head
Puzzle Inbox (the one you are on)	–No	$0.35/inbox	–No	–No
Hypertide Entra/Outlook-style domains at $25 with 25 inboxes included.	–No	$3.30/inbox/mo	–No	✓Yes	Head to head
Zapmail Google and Microsoft reseller mailboxes from $39/mo.	–No	$39/mo	–No	✓Yes	Head to head
Maildoso SMTP at $2.50 per mailbox if you skip Outlook UI.	–No	$75/mo	✓Yes	✓Yes	Head to head
Cheap Inboxes Google and Microsoft inboxes from $3.50 with admin access.	–No	$3.50/mailbox/mo	✓Yes	✓Yes	Head to head

What each one does differently

Hypertide

$3.30/inbox/mo API

Why it comes up: Entra/Outlook-style domains at $25 with 25 inboxes included.

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.

Best for

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

Read the Hypertide write-up Puzzle Inbox vs Hypertide

Zapmail

$39/mo API

Why it comes up: Google and Microsoft reseller mailboxes from $39/mo.

Stands out: Pre-warmed US/EU Google and Microsoft mailboxes with automated DNS and OAuth export to sequencers.

Watch out: API access starts on Pro at $299/mo. Extra Google mailboxes cost $3.50 each on Starter.

Best for

Freelancers starting with 10 Google inboxes
Agencies that want pre-warmed Workspace accounts
Teams exporting to Instantly or Smartlead

Read the Zapmail write-up Puzzle Inbox vs Zapmail

Maildoso

$75/mo MCP API

Why it comes up: SMTP at $2.50 per mailbox if you skip Outlook UI.

Stands out: MCP at mcp.maildoso.com plus REST so assistants can register domains and create mailboxes.

Watch out: Monthly plans skip domains ($12/year each). Cap is 1,000 mailboxes. A 30-day money-back window is not a trial.

Best for

Agencies that want cheap SMTP at volume
Teams automating inbox setup through MCP
Senders who will buy or connect their own domains

Read the Maildoso write-up Puzzle Inbox vs Maildoso

Cheap Inboxes

$3.50/mailbox/mo MCP API

Why it comes up: Google and Microsoft inboxes from $3.50 with admin access.

Stands out: MCP at api.cheapinboxes.com/mcp plus a REST checkout so agents can provision domains and mailboxes.

Watch out: The $3.50 rate is the 1-99 mailbox tier. Volume drops to $2.80 at 1,000-plus. Domains start at $2.50 per year extra.

Best for

Agencies automating inbox orders through MCP
Teams that want one domain per workspace
Senders exporting over OAuth to Instantly or Smartlead

Read the Cheap Inboxes write-up Puzzle Inbox vs Cheap Inboxes

Common questions

What is the best Puzzle Inbox alternative?

It depends on what sent you looking. Our write-ups put Hypertide closest to Puzzle Inbox. Why it comes up: Entra/Outlook-style domains at $25 with 25 inboxes included. The table above shows all 4 on price, free tier, MCP and API.

What is the cheapest Puzzle Inbox alternative?

Of the published starting prices here, Hypertide is lowest at $3.30/inbox/mo. Starting price is the entry plan, not the seat count you will end up on, so read the plan table on each listing.

Which Puzzle Inbox alternatives have an MCP server?

Maildoso and Cheap Inboxes ship a first party MCP server, so you can drive them from Claude or ChatGPT without building against the API yourself.

Keep looking

Back to the Puzzle Inbox write-up Every Deliverability tool we list Search the whole directory

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