Inboxkit vs Maildoso (2026): which should you pick?
As of Nov 12, 2026, Inboxkit grades higher than Maildoso: 1.8 against 1.4 out of 4.0.
Checked Nov 12, 2026 · graded Nov 12, 2026 by ToolGPA
Inboxkit grades higher on value for money. They get the same grade on the free plan, features, ease of use and platforms.
Price, platforms and features side by side. The table says where each price was read and when.
Inboxkit
Google and Microsoft mailboxes for cold email, priced per mailbox
Which one is for you
Pick Inboxkit if
- Fits if you run a sequencer and need a lot of mailboxes fast
- Works for teams who want Google or Microsoft mailboxes, not shared SMTP
Look elsewhere if
- Skip it if you want a sending tool, since you still need a sequencer
- Not for you if you want a free trial, as there isn't one
- Watch out: warmup and InfraGuard are paid add-ons and their rates aren't shown
- Tight if you can't top up a prepaid wallet by card
Pick Maildoso if
- Fits if you need 30 or more mailboxes for an outbound team
- Works for senders who already run Instantly or Smartlead
Look elsewhere if
- Skip it if you need just a few mailboxes, since 30 is the smallest block
- Not for you if you want a trial or a discount, because neither exists
- Watch out: domains cost extra, $15 a year or $11.90 a month pre-warmed
- Tight if you want volume per mailbox: 15 cold emails a day each
How we grade them
| 1.8GPAInboxkitWeak | 1.4GPAMaildosoWeak | |
|---|---|---|
| Value for money | B$2.50 a mailbox a month on yearly billing, $3 monthly. Ten mailboxes is $25, in the cheapest quarter ($25). Domains cost extra, from $12.50 each, once. | D$75 a month for 30 mailboxes is the smallest plan, which is where the category's dearest tenth begins. Domains aren't included. It is cheaper per mailbox as blocks grow. |
| Free plan and trial | FNo free plan and no trial. Each mailbox is charged from the first month, out of a prepaid wallet. | FNo free plan and no trial on record. It also has a no-discount policy. |
| Features | DIt supplies mailboxes and DNS, and needs a sequencer like Instantly or Smartlead to do anything. Warmup and InfraGuard are add-ons. | DMailboxes and DNS only. It is infrastructure and needs a separate sender, and each mailbox is capped at 15 cold emails a day. |
| Ease of use | CNo store rating on record. DNS is automated, but you still connect mailboxes to another tool. | CNo store rating on record. Mailboxes come set up, but new ones need about 14 days of warm-up and a sender to connect. |
| Platforms and integrations | BWeb with an API, plus Instantly, Smartlead, Apollo, Google Workspace and Microsoft 365. | BWeb, exporting to Instantly, Smartlead, Saleshandy and EmailBizon. |
| Best for | Google and Microsoft mailboxes for cold email | blocks of cold-email mailboxes |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: Inboxkit and Maildoso. How we grade
Price against what you get
Inboxkit starts at $2.50 a month and scores 2.0 out of 4 on features, ease of use and platforms. Maildoso starts at $75 a month and scores 2.0.
They score the same, and Inboxkit starts $72.50 a month lower. Of the other cold outreach tools on the chart, none scores higher than Inboxkit for less, and 30 score higher than Maildoso for less.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Where they differ
- Inboxkit also covers inbox warm-up.
At a glance
| Inboxkit | Maildoso | |
|---|---|---|
| Pricing | Paid | Paid |
| Starts at | $2.50 per mailbox / month, billed yearly ($3 billed monthly) | $75 per month for 30 mailboxes |
| Free plan | None | None |
| Free trial | None listed | None listed |
| Web | ||
| Made by | Inboxkit | BacklinkSwappers, inc. |
| Price read from | inboxkit.com | maildoso.ai |
| Checked | Nov 12, 2026 | Nov 12, 2026 |
Worth knowing
Inboxkit
- Mailboxes are paid from a prepaid wallet topped up by card, with NET-30 invoicing offered only for large volumes.
- Warmup and InfraGuard are paid add-ons; the pricing page does not give their rates.
- There is no free trial: creating an account is free, but each mailbox is charged from the first month.
- The page says there is no promo code; the saving comes from choosing quarterly or annual billing.
Maildoso
- Each mailbox sends at most 15 cold emails and 80 warm-up emails a day, and new mailboxes still need about 14 days of warm-up unless they sit on pre-warmed domains.
- Domains are not included in monthly plans: registration is $15 a year and a pre-warmed domain is $11.90 a month.
- Quarterly plans with domains included are labeled legacy on the pricing page; the monthly blocks are the current plans.
- Subscriptions are canceled through support chat or email, and the page says it has a no-discount policy with no promotions.
Key features
Inboxkit
- Official Google and Microsoft accounts
- Mailboxes are real Google Workspace or Microsoft 365 accounts with admin panel access and 2FA for each domain.
- Automated DNS setup
- SPF, DKIM and DMARC records are configured for you, and an isolated panel is kept per domain.
- Sequencer connections
- The vendor lists 24+ integrations with sequencers such as Instantly, Smartlead and Apollo, plus a full REST API with webhooks.
- Mailbox analytics
- Per-mailbox bounce and reply metrics, real-time monitoring and weekly mailbox reports.
- Warmup and InfraGuard add-ons
- Warmup runs on an isolated network, priced per mailbox; InfraGuard watches blacklists and DNS every 6 hours, with the first month free.
- MCP server
- An Inboxkit MCP server lets an AI assistant query mailboxes, domains, DNS and warmup, with hard-to-undo changes waiting for approval.
Maildoso
- Mailboxes built for outbound
- Dedicated mailboxes on the vendor's own servers and IPs, with IP rotation and automatic replacement of IPs that stop working.
- Automatic DNS setup
- SPF, DKIM and DMARC records are configured when you register mailboxes under a domain bought or connected through the dashboard.
- Self-healing and health scores
- Burned-out mailboxes are disconnected from campaigns for 14 days, and inbox placement tests run every 3 days with a health score per mailbox.
- Sequencer export
- Mailboxes can be exported to outreach platforms; Instantly, Smartlead and EmailBizon sync with one click, and the vendor says 9 sequencers are supported.
- API and MCP server
- Register domains, create mailboxes and push them to a sequencer from code or from an AI assistant such as Claude.
- Pre-warmed domains
- Domains warmed in advance, each holding up to 50 mailboxes, so new mailboxes can start sending without the usual 14-day wait.
Plans
Inboxkit
Google or Microsoft 365 mailbox$2.50
per mailbox / month, billed yearly ($3 billed monthly)
Same rate at any volume. Includes DNS setup, a domain admin panel, API access and unlimited team members.
Azure tenant$30
per tenant / month, up to 100 mailboxes
Microsoft 365 mailboxes on Azure; each tenant holds up to 100 mailboxes.
Pre-warmed mailbox$6
per mailbox / month, domain warmed 2-4 weeks
$7 at 4-8 weeks and $9 at 8+ weeks of warming, billed monthly; each domain also has a one-time fee from $12.50.
Maildoso
30 mailboxes$75
per month for 30 mailboxes ($2.50 each)
Aimed at early-stage teams. Up to 15 cold emails a day per mailbox, plus the features every plan includes.
300 mailboxes$225
per month for 300 mailboxes ($0.75 each)
Aimed at expanding teams. Same features and 15-a-day limit per mailbox as the smaller block.
1,000 mailboxes$499
per month for 1,000 mailboxes ($0.49 each)
Aimed at large-scale campaigns. Same features and per-mailbox limit.
Ways to pay less
Inboxkit
- Annual discount
Annual billing saves 17%
Inboxkit's pricing page lists $2.50 per mailbox a month on annual billing against $3 monthly, and 10% off quarterly billing.
Maildoso
No public discounts listed.
Common questions
Which is cheaper, Inboxkit or Maildoso?
As of Nov 12, 2026, Inboxkit is cheaper to start with: $2.50 a month, against $75 a month for Maildoso. Inboxkit starts at $2.50 per mailbox / month, billed yearly ($3 billed monthly), and Maildoso starts at $75 per month for 30 mailboxes.
Which has a free plan, Inboxkit or Maildoso?
As of Nov 12, 2026, neither Inboxkit nor Maildoso has a free plan.
More comparisons
How this page was made
- The verdict at the top follows a fixed rule. When both tools are in the same category and either is in our top three for it, the verdict follows that ranking: the higher-placed tool is our pick. The top three weigh who each tool suits as well as its grades, so a pick can go against the GPA. Otherwise the page does not pick one and says which grades higher: the higher GPA first; on a tie, the one with a free plan, then the one that starts cheaper in dollars a month, counted the same way for both; if they are still level, what the choice depends on.
- The grades are our own, from each tool’s review or report card. The GPA is their average.
- Prices, plans and platforms come from each tool’s listing. The table above says where each price was read and when.
- The differences and the answers to the questions are worked out from those listings.