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Everything you need to land in primary

Email infrastructure for outreach teams: Google, Microsoft 365 & Azure mailboxes

  • G2 High Performer — Email Deliverability, Spring 2026
  • G2 High Performer — Small Business, Email Deliverability, Spring 2026
  • G2 Users Most Likely To Recommend — Email Deliverability, Spring 2026
  • G2 Users Most Likely To Recommend — Small Business, Spring 2026
  • G2 High Performer — Asia Pacific, Email Deliverability, Spring 2026
  • G2 High Performer — Asia, Email Deliverability, Spring 2026
  • G2 High Performer — India, Email Deliverability, Spring 2026

Trusted by

Trusted by: Vectify, HeyReach, C17 Labs, Anevo Marketing, Understory, NoBroker, 11x, Polar Analytics, PwC, Gupshup, Zendesk, Gorgias, Expandi, LeadMagic

Email Infrastructure That Actually Delivers

90%+ Inbox Rate

Official Google, Microsoft & Azure accounts

Full API Access

Build custom workflows with webhooks

24+ Integrations

Works with every email tool

Setup in 20 Minutes

Get started in no time

Email Insights

Track reply, bounce rate instantly

Full Admin Control

Your domain, your rules

Unlimited Team

Add as many users as you need

Built-in Warmup

Warm up every mailbox automatically

Ready in 10 Minutes

Whether you’re setting up 10 mailboxes or 1,000, getting started is quick. Connect your domain with one click and start sending in minutes.

Domain Health Check

Blacklist status verified
No past abuse detected
100% fresh domains

All domains pre-screened for blacklists and past abuse. Only healthy, reputation-clean domains delivered.

Verified before purchase

Dedicated Panel for Each Domain

Every domain gets its own isolated panel. If one domain's reputation gets damaged, others remain unaffected. Complete isolation means maximum protection and zero cross-contamination.

DNS Configuration DFY

We configure DKIM, DMARC, and SPF records automatically. Your emails land in inboxes, not spam folders. Maximum deliverability without the technical headaches.

Scale with Bulk Operations

Buy multiple mailboxes at once and let AI fill in the details. Go from 1 to 100 mailboxes without the manual work. Perfect for agencies and growing teams.

How InboxKit Compares

Deliverability first, then trust, then price: see how InboxKit stacks up. Official, paid Google Workspace and Microsoft 365 mailboxes at $3 per mailbox, flat.

All Features: 11 of 11 features

Feature-by-feature comparison of InboxKit, ZapMail, HyperTide, and Maildoso email infrastructure platforms.
FeaturesInboxKitOfficial Google WorkspaceZapMailHyperTideMaildoso

Mailbox Types

Google, Microsoft 365, Azure & pre-warmed mailboxesGoogle, Microsoft 365 & pre-warmed mailboxesGoogle, Entra (Azure)SMTP (rotating IPs)

Email Warmup

YesNot providedNot providedNot provided

Monitoring & Insights

Detailed Email Insights + InfraGuardZapShield onlyBasicPlacement tests every 3 days + health scores

Infra Management

Domain rotation, domain warmup + email migrationNoNoIP rotation + mailbox recovery

Done-for-you Deliverability

Managed service availableNoNoNo

API-first & MCP

119 REST endpoints, webhooks + MCP serverAPI + MCP server, $299 plan onlyNot documentedAPI + MCP server

Platform Integrations

20+20+Under 109 native

White-label + Multi-workspace

YesMulti-workspace onlyNot listedNot listed

Support

24/7 (Slack, in-app chat & email)24/7 (G2 reviews raise concerns)4 to 24 hr responseBusiness hours, ~20 min reply (claimed)

G2 Rating

4.7 on G23.9 on G2 (7 reviews)No ratings4.6 on G2 (215 reviews)

Pricing

From $2.50/mailbox/mo, from 1 mailboxPlans from $39 for 10$1500 setup fee + $25 per domain$75 for 30 SMTP mailboxes

Still not able to choose the platform?

See what people had to say about us

Hear it from the teams sending on InboxKit

Agency founders on why they moved their mailboxes to InboxKit and what changed. Play any video here, then read the full story.

All customer stories

2.6x more positive replies

Wesley Hoang

Co-founder, Cymate

Read the case study

4.3K active mailboxes

Walter Winn

Head of GTM, Anevo Marketing

Read the case study

11.5% reply rate, 0.6% bounces

Jayson DeMers

Founder & CEO, OutreachBloom

Read the case study

534K emails a week, 9.5% replies

Floris Jansen

CEO & Founder, Vectify

Read the case study

12,645 mailboxes, 5,510 domains

Utkarsh Rana

GTM Head, C17 Lab

Read the case study

1,600 mailboxes, 50% less admin

Thomas Tzouridis

CEO, ActiScale

Read the case study

15.2% reply rate at 80K emails a week

Samuel Weinstein

Co-founder & CEO, The Growth Pro

Read the case study

Pre-warmed mailboxes, live in hours

Tim Yakubson

Founder, B2B Boosted

Read the case study

No subscription plans.
One flat rate per mailbox.

Google Workspace and Microsoft 365 at the same price. Start with one mailbox today.

Google Workspace or Microsoft 365 mailbox

$3.00$2.50/mailbox/moSave 17%
GoogleMicrosoft 365Same price, either provider.
Get started for free

Free account. Pay only for the mailboxes you add.

Azure tenant

$30.00/tenant/moUp to 100 mailboxes

Every mailbox includes

Deliverability

  • Official admin panelOne per domain, with 2FA.
  • Real-time monitoringAlerts before a problem costs you replies.

Control

  • 24+ platform integrationsSmartlead, Instantly, Apollo, Lemlist and more.
  • Full API accessWebhooks for every event that matters.

Your team

  • Unlimited membersAnd unlimited workspaces, at no extra cost.
  • Email & chat supportFrom people who run this infrastructure.

Add-ons

Email WarmupIsolated warmup network, per mailbox.
InfraGuardBlacklist, DNS and bounce monitoring every 6 hours.1st month free

Book your strategy call

Get personalized insights on how InboxKit can transform your email infrastructure and achieve inbox placement rates of 90%+

Tell us about your setup

Takes 30 seconds, then pick a time that works for you.

Questions? We've got answers

Quick answers to common questions.

InboxKit is your complete email infrastructure in one place. We deliver Google, Microsoft, and Azure mailboxes with zero setup fees—fully automated, fastest in the market, and integrated with 24+ sequencers. Manage all your mailboxes from a single dashboard with automated billing, InfraGuard protection, Email Analytics, Bounce Monitoring, and Inbox Placement Tests. Everything you need to land in primary, without the complexity.

InboxKit provides official Google Workspace and Microsoft 365 accounts, achieving 90%+ inbox placement rates. Unlike other providers, you get complete admin control over each domain, built-in 2FA security, app passwords for seamless integration with any email platform, and our proprietary warmup system that builds sender reputation automatically. Our infrastructure is built specifically for email outreach with advanced features like domain rotation, engagement tracking, and real-time deliverability monitoring.

Getting started takes less than 10 minutes with our completely automated setup process. Simply connect your domain, and our system instantly configures all DNS records (SPF, DKIM, DMARC), creates your mailbox account, enables 2FA security, generates app passwords for your outreach tools, and begins the automated warmup sequence. Most users see dramatic deliverability improvements within the first 24 hours, with full optimization achieved after our 14-day warmup protocol.

We have 24+ integrations live in the platform directly, or you can build your own integration smoothly. InboxKit integrates seamlessly with major email platforms including Instantly, Smartlead, Apollo, Reply, Lemlist, Plusvibe, and many more. Our universal app password system works with any SMTP-compatible platform, ensuring 100% compatibility. We also provide a comprehensive REST API and webhook notifications for real-time events. Our technical team offers free integration support to help you connect any custom tools or workflows to your InboxKit infrastructure.

We provide 24/7 expert technical support for every customer via live chat, email, and phone. Our support team consists of email deliverability specialists who can resolve complex issues quickly. High-volume customers get a dedicated Slack channel with less than a one-hour SLA, a dedicated success manager for strategic guidance, and access to our technical implementation team for custom configurations. We also offer comprehensive onboarding, regular health checks, and proactive monitoring to prevent issues before they impact your campaigns.

For Google, Microsoft, and Azure mailboxes, we complete orders in 30 to 120 minutes automatically. This includes setting up the admin panel, configuring DKIM, adding profile pictures, making accounts public, and connecting with your email sending platform.

Absolutely! Our white-glove migration service handles the complete transfer of your existing email infrastructure, campaigns, and data to InboxKit with zero downtime. The process includes: comprehensive audit of your current setup, automated data export and import, DNS record migration and optimization, campaign continuity planning, and parallel testing to ensure everything works perfectly. Most migrations complete within 24-48 hours, and our migration specialists provide step-by-step guidance throughout the process. We also offer rollback capabilities and 30 days of post-migration support to ensure a smooth transition.

Isolated Warmup is InboxKit's built-in email warmup service. It gradually increases your sending volume to build sender reputation with Google, Microsoft, and Azure mailboxes. Each mailbox warms up independently on an isolated schedule so one mailbox's activity doesn't affect another. Warmup is available as an add-on at $3 per mailbox per month from your InboxKit dashboard.

InfraGuard is InboxKit's always-on domain protection suite. It monitors your domains against blacklists every 6 hours, watches your DNS configuration for changes, tracks bounce rates across all mailboxes, and runs automated inbox placement tests. InfraGuard catches deliverability issues before they impact your campaigns. It's available as a separate add-on from your InboxKit dashboard, with the first month free.

Unlock the power of deliverability with InboxKit.