Cheap Inboxes
Low cost Google Workspace and Microsoft 365 mailbox reselling.
From $3.50/mailbox/mo MCP server API
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Bottom line
Google and Microsoft inboxes for cold email, from $3.50 per mailbox per month. REST API and MCP included.
Stands out for: MCP at api.cheapinboxes.com/mcp plus a REST checkout so agents can provision domains and mailboxes.
Watch out for: 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.
Overview
Cheap Inboxes sells Google Workspace and Microsoft 365 mailboxes for cold email, with automated DNS, one domain per workspace, and OAuth export to sequencers. Pricing is $3.50 per mailbox per month for 1 to 99 mailboxes, $3.25 for 100 to 249, $3.00 for 250 to 999, and $2.80 for 1,000-plus. The same rates apply to Google and Microsoft. Domains start at $2.50 per year. Pre-warmed inboxes are offered. A developer API and an MCP server let you provision domains, mailboxes, DNS, and sequencer connections in one call.
Agencies pick Cheap Inboxes for admin-access Business Starter mailboxes without a 10-slot Forge minimum. Instantly, Smartlead, Reachinbox, Reply, and Lemlist are named for export. There is no printed free trial. The $3.50 tier is the public entry; larger orders drop the unit rate. MCP lives at api.cheapinboxes.com/mcp with Bearer auth. This is a Google/Microsoft reseller, not private SMTP.
Who it's for
Best for
- Agencies automating inbox orders through MCP
- Teams that want one domain per workspace
- Senders exporting over OAuth to Instantly or Smartlead
- Buyers starting under 100 mailboxes
Not ideal for
- Senders who need dedicated SMTP IPs they control
- Teams that want domains included in the $3.50 rate
Key features
Google Workspace. Official Google Workspace mailbox provisioning for outbound sending.
Microsoft 365. Official Microsoft 365 / Outlook mailbox provisioning for outbound sending.
MCP server
First-party MCP confirmed on the vendor site: https://www.cheapinboxes.com/developers
Setup steps and live status MCP Directory Check your stack in the MCP readiness checker
Pricing
| Plan | Price | What you get |
|---|---|---|
| 1 to 99 mailboxes | $3.50/mailbox/mo | Same price for Google and Microsoft |
| 100 to 249 mailboxes | $3.25/mailbox/mo | Same price for Google and Microsoft |
| 250 to 999 mailboxes | $3.00/mailbox/mo | Same price for Google and Microsoft |
| 1,000 or more mailboxes | $2.80/mailbox/mo | Domains from $2.50 a year |
1-99 mailboxes $3.50/mailbox/month, 100-249 $3.25, 250-999 $3.00, 1,000+ $2.80. Same price for Google and Microsoft. Domains from $2.50/year. API and MCP included. No free trial stated. Confirm current terms on the vendor site.
Checked 19 Sep 2026. Vendors change prices without notice.
Is Cheap Inboxes expensive?
Cheap Inboxes starts at $3.50/mailbox/mo. 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
- $3.50/mailbox/mo under 100
- MCP and REST API included
- Google and Microsoft same price
Cons
- Domains extra from $2.50/year
- No published free trial
- Not dedicated SMTP you control
Integrations
Instantly Smartlead ReachInbox Reply Lemlist
What's new at Cheap Inboxes
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How Cheap Inboxes compares
See all Cheap Inboxes alternatives, with what each one does differently and a head to head for every pairing.
| Tool | Free tier | From | MCP | API | Compare |
|---|---|---|---|---|---|
| | – | $3.50/mailbox/mo | ✓ | ✓ | |
| | – | $39/mo | – | ✓ | Compare |
| | – | $3.30/inbox/mo | – | ✓ | Compare |
| | – | $4.50/mailbox/mo | – | ✓ | Compare |
 InboxKit Google and Microsoft from $2.50/mailbox on annual wallet billing. | – | $2.50/mailbox/mo | – | ✓ | Compare |
$39/mo API
Similar Google/Microsoft reseller from $39/mo for 10 inboxes.
$3.30/inbox/mo API
Google inboxes at $3.30 with no tiered volume table.
$4.50/mailbox/mo API
Forge-stack Google and Microsoft slots from $4.50 yearly.
InboxKit$2.50/mailbox/mo API
Google and Microsoft from $2.50/mailbox on annual wallet billing.
Your next step
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