# InboxKit

**Source:** https://www.startuphub.ai/startups/inboxkit
**Profile type:** Startup

> InboxKit provides email infrastructure for sales teams and agencies, offering Google Workspace, Microsoft 365, and Azure mailboxes with automated DNS, warmup, and monitoring.

## About

InboxKit is an email infrastructure company that provisions and manages Google Workspace, Microsoft 365, and Azure mailboxes on customer domains. It automates DNS setup (SPF, DKIM, DMARC), warms up mailboxes on isolated networks, and monitors deliverability to ensure outreach emails reach the inbox. The service is designed for sales teams and agencies to scale their cold email campaigns without needing in-house deliverability expertise.

## Key facts

- **Slug:** inboxkit
- **Website:** https://inboxkit.com
- **Location:** Dubai, United Arab Emirates
- **Founded:** 2023-01-01
- **Employees:** 51
- **Operating status:** Active
- **Sectors / tags:** Email Infrastructure, Email Deliverability, Sales Automation, Marketing Automation, B2B SaaS
- **Social:**
  - LinkedIn: https://www.linkedin.com/company/inboxkit

## Pricing

| Plan | Price | Includes |
| --- | --- | --- |
| Standard Monthly | $3.00 / month | Per mailbox per month, no base fee or minimum, includes DNS setup, admin panel, API and integrations |
| Standard Annual | $2.50 / month | Per mailbox per month billed yearly, 17 percent off monthly rate |
| Azure Tenant Monthly | $30.00 / month | Per tenant per month, up to 100 mailboxes per tenant |
| Pre-warmed 2-4 Weeks | $6.00 / month | Per mailbox per month for Google or Microsoft 365, plus one-time domain fee from $12.50 |
| Pre-warmed 4-8 Weeks | $7.00 / month | Per mailbox per month for Google or Microsoft 365, plus one-time domain fee from $12.50 |
| Pre-warmed 8+ Weeks | $9.00 / month | Per mailbox per month for Google or Microsoft 365, plus one-time domain fee from $12.50 |

One flat rate with no plans, no base fee and no minimum. Free account requires no card, pay only for mailboxes added. Quarterly billing saves 10 percent. Azure pre-warmed tenants are $30, $40 and $50 per month for 2-4, 4-8 and 8+ weeks.

Plans as published by InboxKit, checked November 2026.

## StartupHub.ai scores

- **Ahrefs DR:** 37/100
- **Agent Readiness:** A+ (90/100)
- **Site Speed:** 88/100
- **Data Trust:** 95/100

## Tech stack

Detected on inboxkit.com, last scanned 2026-11-03.

- **Frontend:** Next.js, Tailwind CSS
- **Analytics:** PostHog
- **CDN:** Vercel
- **Email provider:** Google Workspace
- **Email marketing:** Customer.io
- **Affiliate program:** Self-hosted affiliate
- **Visitor tracking:** Vector

## JSON-LD

Structured data aligned with this page's `<script type="application/ld+json">` (included when the profile is server-rendered).

```json
{
  "@context": "https://schema.org",
  "@graph": [
    {
      "@type": "BreadcrumbList",
      "itemListElement": [
        {
          "@type": "ListItem",
          "position": 1,
          "name": "Home",
          "item": "https://www.startuphub.ai"
        },
        {
          "@type": "ListItem",
          "position": 2,
          "name": "Startups",
          "item": "https://www.startuphub.ai/startups"
        },
        {
          "@type": "ListItem",
          "position": 3,
          "name": "InboxKit",
          "item": "https://www.startuphub.ai/startups/inboxkit"
        }
      ]
    },
    {
      "@type": "ProfilePage",
      "@id": "https://www.startuphub.ai/startups/inboxkit#webpage",
      "url": "https://www.startuphub.ai/startups/inboxkit",
      "name": "InboxKit - AI Startup Profile | StartupHub.ai",
      "description": "This is the StartupHub.ai profile of InboxKit. InboxKit is a startup founded in 2023, operating in Email Infrastructure and Email Deliverability. InboxKit provides email infrastructure for sales teams and agencies, offering Google Workspace, Microsoft 365, and Azure mailboxes with automated DNS, warmup, and monitoring. Headquartered in Dubai, United Arab Emirates. The company has approximately 51 employees.",
      "dateModified": "2026-11-03T19:38:11.058Z",
      "mainEntity": {
        "@type": "Organization",
        "@id": "https://www.startuphub.ai/startups/inboxkit#organization"
      }
    },
    {
      "@type": "Organization",
      "@id": "https://www.startuphub.ai/startups/inboxkit#organization",
      "name": "InboxKit",
      "url": "https://inboxkit.com",
      "logo": "https://cdn.startuphub.ai/storage/v1/object/public/entity-images/logos/066cd96e-d510-43eb-842f-af70fef75d35-square.webp",
      "image": "https://cdn.startuphub.ai/storage/v1/object/public/entity-images/logos/066cd96e-d510-43eb-842f-af70fef75d35-square.webp",
      "description": "InboxKit is an email infrastructure company that provisions and manages Google Workspace, Microsoft 365, and Azure mailboxes on customer domains. It automates DNS setup (SPF, DKIM, DMARC), warms up mailboxes on isolated networks, and monitors deliverability to ensure outreach emails reach the inbox. The service is designed for sales teams and agencies to scale their cold email campaigns without needing in-house deliverability expertise.",
      "sameAs": [
        "https://www.linkedin.com/company/inboxkit"
      ],
      "foundingDate": "2023-01-01",
      "numberOfEmployees": {
        "@type": "QuantitativeValue",
        "value": 51
      },
      "address": {
        "@type": "PostalAddress",
        "addressLocality": "Dubai",
        "addressCountry": "United Arab Emirates"
      },
      "knowsAbout": [
        "Email Infrastructure",
        "Email Deliverability",
        "Sales Automation",
        "Marketing Automation",
        "B2B SaaS"
      ]
    }
  ]
}
```

## Community reviews

Community reviews below were gathered from public sources into one place. Each quote is copied word for word and links to where it was posted.

- **Reddit r/Coldemailing** | randyhandymandy | 2026-08-09 | negative | highlighted criticism
  > "Having issues with Sequencer InboxKit to Instantly. Hi, I recently purchased 30 Google inboxes from InboxKit. But the sequencer is not pushing the inboxes to instantly, I have also started an export in Inboxkit but nothing after 24 hours. Curious to know if anyone else had the same issues. I am worried about using the email and password to manually enter them into Instantly as Instantly states that this way would be more prone to disconnects. Any thoughts would be appreciated."
  > Source: https://www.reddit.com/r/Coldemailing/comments/1vjtto2/having_issues_with_sequencer_inboxkit_to_instantly/
- **Reddit r/SaaS** | BothAd1744 | 2026-08-19 | mixed
  > "Im running cold email for my SaaS on google workspace mailboxes I set up myself a while back. It;s been fine but managing it is a pain, every new domain is me back in dns records doing spf/dkim/dmarc by hand and then warmup before i can send anything. Im thinking about moving to one of the dedicated providers, zapmail, primeforge or inboxkit as they handle the setup and warmup for you so iIm not rebuilding infrastructure every time i add domains."
  > Source: https://www.reddit.com/r/SaaS/comments/1vsjss2/zapmail_primeforge_inboxkit/
- **Reddit r/Coldemailing** | Fragrant_Clue_1142 | 2026-08-08 | mixed
  > "Zapmail vs InboxKit. Hey everyone, Setting up cold email infrastructure using a 70/30 split between Google Workspace and Microsoft Outlook. I will be handling all warm-ups and monitoring manually inside Instantly. I'm deciding between Zapmail and InboxKit (both flat at $99/mo for 30 slots without add-ons): The IP Issue: Zapmail markets US/EU IPs, but multiple reviews state their accounts are sourced via APAC/India resellers. For targeting US/EU prospects, this regional arbitrage feels like an immediate spam flag. InboxKit claims direct US-based routing. How bad is Zapmail's IP issue in reality? No-Addon Monitoring: Dropping InboxKit’s paid InfraGuard leaves their monitoring pretty bare-bones"
  > Source: https://www.reddit.com/r/Coldemailing/comments/1vipdyo/zapmail_vs_inboxkit/
- **Reddit r/Coldemailing** | localspermseller | 2026-07-28 | negative
  > "Spent around 1000$+ on mailboxes and they keep getting burned. (Updated) Hello, as the title says, I keep buying new domains and mailboxes just for them to get burned 3weeks to a month in. I use inboxkit to buy the mailboxes and smartlead for sending and warm up, I use sales nav for leads, anymailfinder for emails, bouncer for email verification, my bounce rates are below 2% most of the time around 1%, i use deep ai personalization for emails so each one is unique with a small template for cta, i get around 3-6% reply rates for the first 2 weeks. yet after a week or 2 of sending 5-10 emails per mailbox a day (after the initial 2 weeks of warm up) i find that my warm up reputation tanks to 50"
  > Source: https://www.reddit.com/r/Coldemailing/comments/1v99g3b/spent_around_1000_on_mailboxes_and_they_keep/
- **Reddit r/Coldemailing** | Foundation-Admirable | 2026-07-24 | mixed
  > "How does services like InboxKit work?. How does services like InboxKit work? They are able to create workspace accounts for so much cheaper than I am able to. Anyone know how they do it, and if it's something that can be done inhouse to save more money?"
  > Source: https://www.reddit.com/r/Coldemailing/comments/1v5j6xt/how_does_services_like_inboxkit_work/