Line by line
| Feature | Inboxkit | Maildoso |
|---|---|---|
| Mailboxes | Official, paid Google Workspace and Microsoft 365, plus Azure | Own SMTP on proprietary servers and rotating IPs |
| Claude Code / Codex (MCP) | Remote MCP server, connects to Claude Code and Codex | API and MCP on every plan |
| Price | $3 a mailbox, or $2.50 annual | 30 for $75, 300 for $225, 1,000 for $499 a month |
| Microsoft | Microsoft 365, plus Azure at $30 a tenant for up to 100 | Not listed |
| Domains | Buy or connect your own | $15 a year, not included in monthly plans |
| Support | 24/7 on Slack, in-app chat and email | US Eastern 2 AM to 5 PM, Central Europe 8 AM to 9 PM |
| Warmup | 14-day warmup on an isolated network, a $3 add-on; or pre-warmed mailboxes | Not provided; at least 14 days with another provider |
| Monitoring (add-on) | InfraGuard every six hours: blacklists, DNS, bounces, placement, auto-pause | Placement tests every 3 days, health score per mailbox |
Competitor details from public pages, checked 19 Oct 2026. Sources: Maildoso pricing (maildoso.ai); Maildoso terms of service (maildoso.ai); Inboxkit pricing.
Competitor offers can change after that date. Trademarks belong to their owners.
Prices at common volumes
| Mailboxes | Inboxkit, monthly | Inboxkit, annual | Maildoso |
|---|---|---|---|
| 30mailboxes | Inboxkit, monthly$90 | Inboxkit, annual$75 | Maildoso$75 |
| 300mailboxes | Inboxkit, monthly$900 | Inboxkit, annual$750 | Maildoso$225 |
| 1,000mailboxes | Inboxkit, monthly$3,000 | Inboxkit, annual$2,500 | Maildoso$499 |
Maildoso is the cheaper buy for bulk SMTP. You can keep it for bulk and put your best prospects on Google and Microsoft accounts.
Maildoso is cheaper per mailbox. Neither price includes warmup; Maildoso has you run it elsewhere for at least 14 days. Sending is capped at 15 cold emails a mailbox a day.
Maildoso pricing against Inboxkit
Maildoso’s monthly plans are 30 mailboxes for $75, 300 for $225 and 1,000 for $499. Other counts are sold in the app, from $0.49 a mailbox.
Inboxkit is $3 a mailbox on monthly billing, or $2.50 on annual, for Google Workspace or Microsoft 365. At 1,000 mailboxes that is $3,000 a month against Maildoso’s $499.
Neither price includes warmup. Maildoso has you run it elsewhere for at least 14 days before a first campaign.
What a Maildoso mailbox is
Maildoso sells its own SMTP mailboxes on proprietary servers and rotating IPs. Its homepage and pricing page list no Google Workspace or Microsoft 365 product. Each mailbox sends up to 15 cold emails a day.
Inboxkit sells official, paid Google Workspace and Microsoft 365 mailboxes at the same $3. For Microsoft volume, one Azure tenant holds up to 100 mailboxes for $30 a month.
Maildoso is the cheaper buy for bulk SMTP. You can keep it for bulk and put your best prospects on Google and Microsoft accounts.
Maildoso setup and domains
Maildoso’s monthly plans do not include domains. Registering one costs $15 a year.
Inboxkit completes orders in 30 to 120 minutes, automatically, with SPF, DKIM and DMARC configured. You buy domains or connect your own in one click. Domain rotation, domain warmup and email migration are built in.
Maildoso warmup and monitoring
Maildoso does not warm mailboxes. You run warmup for at least 14 days first, through another provider or Instantly’s pool. Maildoso tests placement every 3 days and shows a health score for each mailbox. Deliverability audits are free.
Inboxkit’s pre-warmed mailboxes go live in hours. New mailboxes can take a 14-day warmup on an isolated network, at $3 a mailbox. InfraGuard checks blacklists, DNS, bounces and placement every six hours, with auto-pause. It is an add-on, first month free.
Maildoso API and MCP
Every Maildoso plan includes API and MCP access.
Every Inboxkit account gets the full REST API, with 119 endpoints and webhooks. Connect Claude Code or Codex to Inboxkit’s remote MCP server to run your mailbox work from an agent.
Maildoso support hours
Maildoso’s support works set hours: 2 AM to 5 PM US Eastern, and 8 AM to 9 PM Central Europe. It states a 20-minute average response during those hours.
Inboxkit support runs 24/7 on Slack, in-app chat and email. Inboxkit is rated 4.7 out of 5 on G2 from 120 reviews.
Switch from Maildoso in four steps
Create a free account
Pay only for the mailboxes you add. No plan to pick first.
Buy or connect domains
Then add Google Workspace, Microsoft 365 or Azure mailboxes on them.
Export to your sequencer
One click to 24+ sequencers, including Smartlead and Instantly.
Run both side by side
Warm up here while Maildoso keeps sending. Move campaigns before your plan renews.
Questions about Maildoso
Is Maildoso cheaper than Inboxkit?
Yes, per mailbox. 1,000 Maildoso mailboxes cost $499 a month, against $3,000 on Inboxkit. They are SMTP mailboxes that you warm elsewhere, capped at 15 cold emails a day.
How does Maildoso pricing work?
Monthly plans are 30 mailboxes for $75, 300 for $225 and 1,000 for $499. Other counts start at $0.49 a mailbox in the app. Domains cost $15 a year on top.
Does Maildoso sell Google Workspace or Microsoft 365?
No. Maildoso sells its own SMTP mailboxes on proprietary servers and rotating IPs. Inboxkit sells official, paid Google Workspace and Microsoft 365 mailboxes. Azure is $30 a tenant for up to 100.
Does Maildoso include warmup?
No. It asks you to warm new mailboxes elsewhere for at least 14 days before a first campaign. Inboxkit’s 14-day warmup is a $3 add-on. Or start on pre-warmed mailboxes.
Does Maildoso have an MCP server?
Yes, every Maildoso plan includes API and MCP access. Inboxkit includes the REST API, with 119 endpoints, and a remote MCP server on every account.
Is Maildoso legit?
Maildoso is a working SMTP provider with published plans and terms. It caps each mailbox at 15 cold emails a day. It asks for 14 days of warmup before sending.
How do I move from Maildoso to Inboxkit?
Open a free account, buy or connect domains, and add mailboxes. Export them in one click to your sequencer. Keep Maildoso sending until your campaigns have moved.
Open a free account
$3 a mailbox, no minimum. Google Workspace, Microsoft 365 and Azure.
