Software Alternatives, Accelerators & Startups

InboxKit VS Close

Compare InboxKit VS Close and see what are their differences

InboxKit logo InboxKit

Everything you need to land in primary - Infrastructure built for sales teams to send cold emails at scale with Google and Microsoft 365 mailbox licenses.

Close logo Close

A CRM with built-in calling, SMS, and email
  • InboxKit Fresh Dashboard-Home
    Fresh Dashboard-Home //
    2025-10-06

InboxKit is the official Google Cloud Partner providing email infrastructure for cold outreach. It delivers compliant Google Workspace and Microsoft 365 accounts with global IPs, including US and EU IPs, ensuring high deliverability and minimal setup time. Designed for sales teams, agencies and B2B SaaS teams, InboxKit helps users achieve maximum inbox placement without technical hassles. Top capabilities include official Google Workspace provisioning, full API access, done-for-you DNS configuration, bulk mailbox operations, email platform integrations, and isolated domain panels.

Inboxkit streamlines workflows and builds trust with bulk uploads, sequencer integrations, and public tools like SPF/DKIM/DMARC checkers.

  • Close Landing page
    Landing page //
    2023-09-15

InboxKit

$ Details
paid $39.0 / Monthly (including 10 mailboxes)
Platforms
Instantly Smartlead EmailBison Lemlist Apollo PlusVibe MailToaster Za-Zu Emelia
Startup details
Founder(s)
Rahul Lakhaney, Saksham Jain
Employees
10 - 19

Close

Website
close.com
$ Details
-
Platforms
-
Startup details
Country
United States

InboxKit features and specs

  • Official Google Workspace Provisioning with US IPs
    Get official Google Workspace and Microsoft 365 mailboxes with global (US & EU) sending IPs. Each account comes with complete admin control, a dedicated panel for every domain, and 2FA enabled for security.
  • Complete REST API with 64+ Endpoints
    Get complete control of your email setup with our REST API - 64+ endpoints for everything from mailbox setup to deliverability tracking. Build custom workflows, automate tasks, and connect with your tools. No base rate limits, so you can scale fast without restrictions.
  • Done-For-You DNS Configuration
    Zero-touch DNS automation sets up SPF, DKIM, and DMARC in a few seconds - no tech skills needed. Just connect your domain, and we automatically configure, verify, and authenticate everything with expert precision, fixing the top cause of deliverability issues.
  • Automated Bulk Mailbox Operations
    Bulk operations let you create 1000+ mailboxes or connect domains in one go with simple CSV uploads. Allowing you to further scale any certain step in bulk using our APIs without any hassle.
  • Native Sequencer Integrations (15+ Platforms)
    Seamless connectivity with major cold email platforms including Instantly, Smartlead, Lemlist, EmailBison, Apollo, PlusVibe, MailToaster, Za-Zu, Emelia etc. Connect your sequencer in minutes with platform-specific guides and free support. We handle client ID setup, app password creation, and mailbox connection automaticallyโ€”no workflow changes needed.
  • Dedicated admin panel per domain
    Each domain gets its own admin panel and isolated infrastructure, no shared resources, no impact from other domains. Keep your reputation safe by spreading risk across multiple domains.

Close features and specs

  • Unified Interface
    Close provides a complete customer relationship management solution with a robust set of features including email, calling, and SMS integration, all within one platform, which enhances workflow efficiency.
  • Automation Features
    The platform includes extensive automation capabilities such as automated emails, task reminders, and follow-ups, helping to streamline repetitive tasks and improve productivity.
  • Ease of Use
    Close is known for its user-friendly interface and intuitive design, making it accessible for users of varying technical skill levels.
  • Excellent Support
    Close has a strong reputation for providing excellent customer support, including comprehensive onboarding assistance and a wealth of online resources and documentation.
  • Integration Capabilities
    Close integrates seamlessly with numerous other tools and platforms, including popular options like Slack, Zoom, and Zapier, enhancing its functionality and versatility.

Possible disadvantages of Close

  • Pricing
    The cost of Close can be relatively high compared to other CRM solutions, particularly for small businesses or startups operating on limited budgets.
  • Limited Customization
    Some users may find the customization options within Close to be somewhat limited, which can be a drawback for businesses with highly specific needs.
  • Learning Curve
    Despite its overall ease of use, some features can have a steeper learning curve, potentially requiring additional time for new users to become fully proficient.
  • Mobile App Limitations
    The mobile application currently offers fewer functionalities compared to the desktop version, which can be restrictive for users who need to manage workflows on the go.
  • Reporting Features
    While Close offers basic reporting capabilities, some users may find the depth and flexibility of reporting features to be less comprehensive compared to other advanced CRM solutions.

Analysis of InboxKit

Overall verdict

  • InboxKit is a solid choice for teams focused on email deliverability and inbox management, offering tools to warm up inboxes, monitor placement, and improve sender reputation, though prospective users should verify current features and pricing directly with the provider.

Why this product is good

  • Helps improve email deliverability and reduce the chance of messages landing in spam
  • Offers inbox warmup features to build and maintain sender reputation
  • Provides monitoring and analytics to track email placement and performance
  • Useful for scaling cold email and outreach campaigns while protecting domain health
  • Can integrate with existing email and outreach workflows

Recommended for

  • Sales and outreach teams running cold email campaigns
  • Marketing teams focused on improving email deliverability
  • Agencies managing multiple client email accounts
  • Startups and SMBs scaling email outreach who need to protect sender reputation

Analysis of Close

Overall verdict

  • Close is considered a highly effective CRM tool for sales-oriented teams. It offers a range of powerful features that streamline the sales process, though it might be considered expensive for teams not heavily focused on aggressive sales tactics.

Why this product is good

  • Close (close.com) is a customer relationship management (CRM) software designed specifically for sales teams. It is appreciated for its intuitive interface, robust automation features, and efficient communication tools such as email and calling integrations. Users find it especially beneficial for small to medium-sized businesses looking to optimize their sales processes and improve productivity.

Recommended for

    Close is ideal for sales-driven organizations, especially small to medium-sized enterprises (SMEs) that require efficient lead management, streamlined communication, and actionable insights to enhance their sales performance.

InboxKit videos

InboxKit Demo: Email Deliverability Platform Tutorial & Setup Guide

Close videos

Close Netflix Review

More videos:

  • Review - CLOSE (2019) - Netflix Original Movie - One Minute Movie Review
  • Review - Close: Netflix: Ending Explained + Real Life Story Of The Female Bodyguard To The Rich And Famous

Category Popularity

0-100% (relative to InboxKit and Close)
Email Marketing
100 100%
0% 0
CRM
0 0%
100% 100
Email
100 100%
0% 0
Sales
2 2%
98% 98

Questions & Answers

As answered by people managing InboxKit and Close.

What makes your product unique?

InboxKit's answer

What makes InboxKit stand out is it's guaranteed 95% inbox placement, automated security (DKIM, DMARC, SPF), bulk operations, and seamless integration with 15+ leading platforms. InboxKit empowers lead generation agencies and SaaS companies to scale campaigns quickly using official licensed mailboxes, maintain full admin control, and achieve reliable email deliverability with fast setup and expert support.

User comments

Share your experience with using InboxKit and Close. For example, how are they different and which one is better?
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Social recommendations and mentions

Based on our record, Close seems to be more popular. It has been mentiond 8 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

InboxKit mentions (0)

We have not tracked any mentions of InboxKit yet. Tracking of InboxKit recommendations started around Oct 2025.

Close mentions (8)

  • Ask HN: Who is hiring? (March 2024)
    Close (https://close.com) | Multiple Product & Engineering Roles | REMOTE (US) Close is a bootstrapped, profitable, completely remote, ~90 person team of thoughtful individuals who value autonomy and impact. Since 2013, weโ€™ve been building a CRM for small businesses with a focus on better communication, without the hassle of manual data entry or complex UI. We're looking for experienced people in the following... - Source: Hacker News / over 2 years ago
  • Ask HN: Who is hiring? (February 2024)
    Close (https://close.com) | Multiple Product & Engineering Roles | REMOTE (US) Close is a bootstrapped, profitable, completely remote, ~90 person team of thoughtful individuals who value autonomy and impact. Since 2013, weโ€™ve been building a CRM for small businesses with a focus on better communication, without the hassle of manual data entry or complex UI. We're looking for experienced people in the following... - Source: Hacker News / over 2 years ago
  • Why this simple email template can help with your sign-ups conversion
    This sign-up sales email from Close.io (now close.com) will likely increase your conversion rate. Here's why it works well:. Source: about 3 years ago
  • managing SAAS pipeline
    Do you need something to manage outbound email sequences? close.com or quickmail.io are both pretty cool. Source: almost 4 years ago
  • A modern data stack for startups
    On the left, you'll see data sources (only a sample, we have many more than this), tools where we generate and work with data. One of them is Product, the Postgres database that powers incident.io, while Intercom and Close are SaaS we use to run our business. - Source: dev.to / about 4 years ago
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What are some alternatives?

When comparing InboxKit and Close, you can also consider the following products

Infraforge - Private Cold Email Infrastructure Sorted In Minutes

Pipedrive - Sales pipeline software that gets you organized. Helps you focus on the right deals, so easy to use that salespeople just love it. Great for small teams.

Zapmail - Collaborative communication platform built for teams

Zoho CRM - Omnichannel CRM for Businesses of all sizes

Mailpool - Cold Email Infrastructure, Simplified

Insightly - Insightly is the easy, powerful and affordable online Customer Relationship & Project Management Software used by over 400,000 small businesses world wide