Cold Email Index Free PDF reports

Inbox providers · tied for 14th of 52 · 2026

InboxKit pricing and review

inboxkit.com · Google & Microsoft inbox reseller · Visit site ↗

COLD EMAIL INDEX · 2026 · SOURCED FACTS · 59 /100
  • Deliverability12/27
  • Inbox choice13/16
  • Sending6/15
  • API & AI7/7
  • Buying terms6/10
  • Setup cost15/25
tied for 14th of 52 inbox providers

Why it ranks here

Sells Google Workspace and Microsoft 365 inboxes. Inboxes arrive pre-warmed, so you can start sending sooner. Deliverability: automatic SPF/DKIM/DMARC and inbox placement tests. It has a public API and an official MCP server for automation. Agencies get client workspaces or a white-label option.

Key features

  • Automatic SPF/DKIM/DMARC
  • Inbox placement tests
  • Google Workspace inboxes
  • Microsoft 365 inboxes
  • One-click export to other sequencers

Best for

Agencies that run inboxes for several clients.

Pricing

Per inbox
$3
At volume
$2.50
Cheapest plan
$3/mo
Domain (.com)
$12.50/yr

Monthly billing. Pricing page ↗ · checked Oct 31, 2026

Scorecard

DeliverabilityWhat protects sender reputation without extra tools or subscriptions.12/27
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.6/15
API and AI agentsHow easy it is to automate the setup from code or an AI assistant.7/7
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.15/25
Total59/10016 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 site0/6
Pre-warmed inboxesConfirmedPre-warmed mailboxes are priced by how long their domain has warmed, and billed monthly at the same rate.source ↗2/2
Automatic SPF, DKIM and DMARC setupConfirmedWe configure DKIM, DMARC, and SPF records automatically.source ↗5/5
Inbox placement or spam testsConfirmedInbox Placement Tests Now Live. Test your email deliverability across major providers.source ↗5/5
Replacement of burned inboxes or domainsNot found on site0/5
Dedicated IP optionNot found on site0/4
Inbox choice
Google Workspace inboxesConfirmedreal Google Workspace and Microsoft 365 accounts from $2.50 per mailbox per monthsource ↗5/5
Microsoft 365 / Outlook inboxesConfirmedreal Google Workspace and Microsoft 365 accounts from $2.50 per mailbox per monthsource ↗5/5
Private SMTP/IMAP inboxesNot offeredMailbox Types: Google, Microsoft 365, Azure pre-warmed mailboxessource ↗0/3
Domain purchase inside the productConfirmedEach pre-warmed domain also carries a one-time domain fee, from $12.50.source ↗3/3
Sending and workflow
Built-in campaign sequencerNot offeredInboxKit vs Instantly: Sequencer with mailboxes bundled, versus dedicated infrastructure.source ↗0/5
Unified inbox for repliesNot found on site0/4
Export to other sending toolsConfirmedone-click export to 24+ sequencers, including Instantly, Smartlead, lemlist, Apollo and SendKitsource ↗4/4
Multi-client workspaces or white-labelConfirmedWhite-label + Multi-workspace: Yessource ↗2/2
API and AI agents
Public APIConfirmedfull REST API access with webhookssource ↗4/4
Official MCP serverConfirmedAPI-first MCP: 119 REST endpoints, webhooks + MCP serversource ↗3/3
Buying terms
Prices published on the siteConfirmedInboxKit pricing. One flat rate. No plans, no base fee, no minimum.source ↗4/4
Free plan, free trial or money-back guaranteeNot offeredThere is no traditional free trial on top of that, and no minimum or plan to commit tosource ↗0/4
Monthly billing availableConfirmed$3.00/mailbox/month on monthly billing and $2.50 on annualsource ↗2/2
Cost of a working setup
Cost of a working setup (30 inboxes)Calculated30 inboxes × $3 = $90 + $97 — Instantly Hypergrowth for warm-up and sending (the inbox price includes neither) = $187/monthhow ↗15/25

Alternatives to InboxKit

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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Every fact is from the vendor's own site, same rules for everyone · Method · Disclosure