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Inbox providers · tied for 39th of 52 · 2026
Unlimited Inboxes pricing and review
unlimitedinboxes.com · Flat-rate unlimited inboxes · Visit site ↗
- Deliverability10/27
- Inbox choice5/16
- Sending6/15
- API & AI0/7
- Buying terms10/10
- Setup cost8/25
Why it ranks here
Sells Microsoft 365 inboxes. Deliverability: automatic SPF/DKIM/DMARC and replacement of burned inboxes. Agencies get client workspaces or a white-label option. At $1.05 per inbox, it is among the cheapest quarter of providers we track (median $3.15).
Key features
- Automatic SPF/DKIM/DMARC
- Replacement of burned inboxes
- Microsoft 365 inboxes
- One-click export to other sequencers
- A way to try before paying in full
Best for
Agencies that run inboxes for several clients.
Pricing
- Per inbox
- $1.05
- At volume
- $0.06
- Minimum order
- 100 inboxes
- Cheapest plan
- $99/mo
Monthly billing. Pricing page ↗ · checked Oct 31, 2026
Scorecard
| DeliverabilityWhat protects sender reputation without extra tools or subscriptions. | 10/27 | ||
|---|---|---|---|
| Inbox choiceWhich types of inboxes and domains you can get in one place. | 5/16 | ||
| Sending and workflowWhether you can run and manage campaigns without another tool. | 6/15 | ||
| API and AI agentsHow easy it is to automate the setup from code or an AI assistant. | 0/7 | ||
| Buying termsHow much you risk before you know it works. | 10/10 | ||
| Cost of a working setupWhat 30 inboxes plus warm-up and a sequencer cost per month — the cheaper, the more points. | 8/25 | ||
| Total | 39/100 | 13 of 20 conditions checked |
The evidence
Every condition, what the vendor's own site says, and where.
| Deliverability | |||
|---|---|---|---|
| Ongoing warm-up included in the priceNot found on site | 0/6 | ||
| Pre-warmed inboxesNot found on site | 0/2 | ||
Automatic SPF, DKIM and DMARC setupConfirmedWe provision the tenant, create 100 inboxes, configure every DNS record. | source ↗ | 5/5 | |
| Inbox placement or spam testsNot found on site | 0/5 | ||
Replacement of burned inboxes or domainsConfirmedOne click. New tenant, new domain, DNS runs again automatically. No extra charges. | source ↗ | 5/5 | |
| Dedicated IP optionNot found on site | 0/4 | ||
| Inbox choice | |||
Google Workspace inboxesNot offeredGoogle is great for low-volume personal email. Not for cold blast campaigns. | source ↗ | 0/5 | |
Microsoft 365 / Outlook inboxesConfirmedMicrosoft Outlook inboxes at $0.06 each. | source ↗ | 5/5 | |
Private SMTP/IMAP inboxesNot offeredOfficial Microsoft Infrastructure Built on Azure Active Directory and Microsoft 365. Not a workaround. | source ↗ | 0/3 | |
| Domain purchase inside the productNot found on site | 0/3 | ||
| Sending and workflow | |||
Built-in campaign sequencerNot offeredWorks with Smartlead, Instantly | source ↗ | 0/5 | |
| Unified inbox for repliesNot found on site | 0/4 | ||
Export to other sending toolsConfirmedSmartlead Official Integration Instantly.ai Official Integration Pipl AI API Partner | source ↗ | 4/4 | |
Multi-client workspaces or white-labelConfirmedEverything in Pro. Dedicated account manager. Multi-tenant management. Onboarding session. | source ↗ | 2/2 | |
| API and AI agents | |||
| Public APINot found on site | 0/4 | ||
| Official MCP serverNot found on site | 0/3 | ||
| Buying terms | |||
Prices published on the siteConfirmedFree $0 forever 100 real Outlook inboxes. No card. | source ↗ | 4/4 | |
Free plan, free trial or money-back guaranteeConfirmedFree $0 forever 100 real Outlook inboxes. No card. | source ↗ | 4/4 | |
Monthly billing availableConfirmedPro $99 /month Unlimited inboxes. No markup. | source ↗ | 2/2 | |
| Cost of a working setup | |||
Cost of a working setup (30 inboxes)Calculated100 inboxes × $1.05 = $105 + $97 — Instantly Hypergrowth for warm-up and sending (the inbox price includes neither) = $202/month | how ↗ | 8/25 | |
Alternatives to Unlimited Inboxes
Where we checked
- unlimitedinboxes.com/#pricing
- unlimitedinboxes.com/#how-it-works
- unlimitedinboxes.com/#faq
- unlimitedinboxes.com/
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