Inbox providers · 49th of 52 · 2026
ColdSire pricing and review
coldsire.com · Google & Microsoft inbox reseller · Visit site ↗
- Deliverability5/27
- Inbox choice13/16
- Sending4/15
- API & AI0/7
- Buying terms6/10
- Setup cost2/25
Why it ranks here
Sells Google Workspace and Microsoft 365 inboxes. Deliverability: automatic SPF/DKIM/DMARC.
Key features
- Automatic SPF/DKIM/DMARC
- Google Workspace inboxes
- Microsoft 365 inboxes
- One-click export to other sequencers
- Domain purchase
Best for
Senders who want Google and Microsoft inboxes from one vendor.
Pricing
- Per inbox
- $6
- Cheapest plan
- $6/mo
- Domain (.com)
- $15/yr
Monthly billing. Pricing page ↗ · checked Oct 31, 2026
Scorecard
| DeliverabilityWhat protects sender reputation without extra tools or subscriptions. | 5/27 | ||
|---|---|---|---|
| Inbox choiceWhich types of inboxes and domains you can get in one place. | 13/16 | ||
| Sending and workflowWhether you can run and manage campaigns without another tool. | 4/15 | ||
| 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. | 2/25 | ||
| Total | 30/100 | 11 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 setupConfirmedNo. It is completely hands free. We do it for you automatically, instantly, when you purchase your email accounts with us. | source ↗ | 5/5 | |
| Inbox placement or spam testsNot found on site | 0/5 | ||
| Replacement of burned inboxes or domainsNot found on site | 0/5 | ||
| Dedicated IP optionNot found on site | 0/4 | ||
| Inbox choice | |||
Google Workspace inboxesConfirmedPremium Google Workspace $6 /mo per account | source ↗ | 5/5 | |
Microsoft 365 / Outlook inboxesConfirmedPremium Microsoft 365 $6 /mo per account | source ↗ | 5/5 | |
| Private SMTP/IMAP inboxesNot found on site | 0/3 | ||
Domain purchase inside the productConfirmed.com Domains $15 /year per domain | source ↗ | 3/3 | |
| Sending and workflow | |||
Built-in campaign sequencerNot offeredOur pricing is straightforward. You only pay for the domains and email accounts. You don't have to pay us extra for anything else. | source ↗ | 0/5 | |
| Unified inbox for repliesNot found on site | 0/4 | ||
Export to other sending toolsConfirmedSeamless integration One-click setup with Instantly & SmartLead | source ↗ | 4/4 | |
| Multi-client workspaces or white-labelNot found on site | 0/2 | ||
| 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 siteConfirmedSimple, transparent pricing Premium accounts at unbeatable prices | source ↗ | 4/4 | |
| Free plan, free trial or money-back guaranteeNot found on site | 0/4 | ||
Monthly billing availableConfirmedPremium Google Workspace $6 /mo per account | source ↗ | 2/2 | |
| Cost of a working setup | |||
Cost of a working setup (30 inboxes)Calculated30 inboxes × $6 = $180 + $97 — Instantly Hypergrowth for warm-up and sending (the inbox price includes neither) = $277/month | how ↗ | 2/25 | |
Alternatives to ColdSire
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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