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About
What is Premium Inboxes
Premium Inboxes provisions verified Google Workspace and Microsoft 365 accounts for cold email outreach, handling the full technical setup — SPF, DKIM, DMARC, and MX records — so accounts arrive ready to plug into sequencers like Smartlead, Instantly, or Lemlist. It's built for SDRs, BDRs, and agencies that run high-volume outbound and need inbox infrastructure without the manual DNS work. The standout capability is unlimited inbox replacements: if an account gets flagged or burned, it gets swapped out without renegotiating a contract. Where it stops being a fit is if you need the tool to do anything beyond provisioning — there's no sequencing, no copywriting, and no lead data here; it's purely the infrastructure layer.
Capabilities
Key features
Deliverability infrastructure
warmup, spam tests, and sender reputation
Our verdict
Vanderbuild take
For SDRs, BDRs, and agencies that treat inbox infrastructure as a recurring ops problem rather than a one-time setup, Premium Inboxes is a straightforward provisioning service — you order verified accounts, they arrive configured and sequencer-ready within a day. On the agentic side, there's no API and no MCP server, so you can't drive this from an agent or orchestration layer without manual intervention; it's UI-only, full stop. At $3.50 per inbox with no monthly commitment, the cost to test is low, and volume discounts kick in at 250 inboxes. The honest limitation is scope: this tool does one thing — provision and replace inboxes — and if you need warm-up tooling, sequence management, or lead data, you'll be stitching in separate tools alongside it.
Mateusz Sekta
Founder, vanderbuild
Learn more
Our Resources
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The wedge
Agentic stack profile
APINot publicNo public programmatic access.
API
No public API. Not usable from an agent without scraping.
Agentic readinessNoneNot usable from an agent without scraping.
Agentic readiness
No public API. UI-only. Not usable from an agent without scraping, which we don't recommend.
Stack roleDeliverabilityWhere this tool slots into an agentic pipeline.
Stack role
Plays the role of Deliverability in an agentic pipeline. Use it to keep email sending reputation healthy — warmup, spam tests.
Compare
Premium Inboxes alternatives
Tools that solve a similar problem — compared at a glance.
Premium Inboxes(this tool)
- Pricing
- Seat-based
- Budget
- $
- Best for
- SDR / BDR, Agency
- Readiness
- None
- API
- No
Mailforge
- Pricing
- Usage-based
- Budget
- $
- Best for
- Founder, GTM Engineer
- Readiness
- Capable
- MCP
- No
- API
- REST
Infraforge
- Pricing
- Usage-based
- Budget
- $
- Best for
- SDR / BDR, Agency
- Readiness
- Limited
- API
- REST
Answers
Frequently asked questions
Does Premium Inboxes have a public API?
No — there's no publicly documented API as of today. Premium Inboxes is operated through its UI.
How much does Premium Inboxes cost?
Premium Inboxes: pricing is seat-based, expect entry tier ($) spend. Full pricing page: https://premiuminboxes.com/pricing-page.
Who is Premium Inboxes best for?
Premium Inboxes is built for SDR / BDR, Agency. Fits Solo, SMB (1-50)-sized teams.