Inbox providers · tied for 20th of 52 · 2026
OSDomains pricing and review
osdomains.com · Private servers and dedicated IPs · legal entity: OS Domains GmbH · Visit site ↗
- Deliverability16/27
- Inbox choice16/16
- Sending6/15
- API & AI0/7
- Buying terms6/10
- Setup cost12/25
Why it ranks here
Sells Google Workspace, Microsoft 365 and private SMTP inboxes. Inboxes arrive pre-warmed, so you can start sending sooner. Deliverability: automatic SPF/DKIM/DMARC, inbox placement tests and dedicated IPs. Agencies get client workspaces or a white-label option.
Key features
- Automatic SPF/DKIM/DMARC
- Inbox placement tests
- Google Workspace inboxes
- Microsoft 365 inboxes
- Dedicated IPs
Best for
Agencies that run inboxes for several clients.
Pricing
- Per inbox
- $3.38
- At volume
- $1.97
- Cheapest plan
- $561/mo
- Domain (.com)
- $15.75/yr
Monthly billing. Pricing page ↗ · checked Oct 31, 2026
Scorecard
| DeliverabilityWhat protects sender reputation without extra tools or subscriptions. | 16/27 | ||
|---|---|---|---|
| Inbox choiceWhich types of inboxes and domains you can get in one place. | 16/16 | ||
| 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. | 6/10 | ||
| Cost of a working setupWhat 30 inboxes plus warm-up and a sequencer cost per month — the cheaper, the more points. | 12/25 | ||
| Total | 56/100 | 15 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 inboxesConfirmedPre-warmed domains are aged five months or more and send at full volume from the day you pay. | source ↗ | 2/2 | |
Automatic SPF, DKIM and DMARC setupConfirmedEvery domain points at our authoritative DNS by default, with the right MX, SPF, DKIM and DMARC records published at provisioning time. | source ↗ | 5/5 | |
Inbox placement or spam testsConfirmedWeekly placement testing through GlockApps integration | source ↗ | 5/5 | |
| Replacement of burned inboxes or domainsNot found on site | 0/5 | ||
Dedicated IP optionConfirmed5 dedicated IPv4 | source ↗ | 4/4 | |
| Inbox choice | |||
Google Workspace inboxesConfirmedGoogle Workspace: €4 to €5 per mailbox per month | source ↗ | 5/5 | |
Microsoft 365 / Outlook inboxesConfirmedMicrosoft 365: €5 to €7 per mailbox per month | source ↗ | 5/5 | |
Private SMTP/IMAP inboxesConfirmedOS Domains IMAP: €3 per mailbox | source ↗ | 3/3 | |
Domain purchase inside the productConfirmedDomain registration, authoritative DNS and rDNS / PTR for every IP ... from €14/yr | source ↗ | 3/3 | |
| Sending and workflow | |||
| Built-in campaign sequencerNot found on site | 0/5 | ||
| Unified inbox for repliesNot found on site | 0/4 | ||
Export to other sending toolsConfirmedIntegrates with Instantly, Smartlead, Lemlist, Reply.io, Apollo, and Salesforge sequencers via standard SMTP/IMAP credentials. | source ↗ | 4/4 | |
Multi-client workspaces or white-labelConfirmedAgency Plans (Monthly): Starter €499/month (up to 100 mailboxes) | 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 siteConfirmed€299 /month | source ↗ | 4/4 | |
Free plan, free trial or money-back guaranteeNot offeredNo free trial offered. | source ↗ | 0/4 | |
Monthly billing availableConfirmedAnnual prepay saves 15% | source ↗ | 2/2 | |
| Cost of a working setup | |||
Cost of a working setup (30 inboxes)Calculated30 inboxes × $3.38 = $101 + $97 — Instantly Hypergrowth for warm-up and sending (the inbox price includes neither) = $198/month | how ↗ | 12/25 | |
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Where we checked
Only the vendor's own public pages. We do not use third-party reviews or ratings. Something wrong? Send a correction.
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