Software Alternatives, Accelerators & Startups

Mailmeteor VS InboxStack

Compare Mailmeteor VS InboxStack and see what are their differences

Mailmeteor logo Mailmeteor

Send hundreds of personalized emails with Gmail.

InboxStack logo InboxStack

Email deliverability intelligence with root-cause AI
  • Mailmeteor Landing page
    Landing page //
    2019-08-19

Mailmeteor is the easiest and privacy-first mail merge add-on for Gmail.

๐ŸŒ Email a lot of people quickly ๐ŸŒ Add real-time tracking, attachments, alias... ๐ŸŒ Increase your answer rate dramatically

๐Ÿ’ซ Send 75 emails a day for free

  • InboxStack Dashboard
    Dashboard //
    2026-07-20
  • InboxStack Multi ESP Dashboard
    Multi ESP Dashboard //
    2026-07-20
  • InboxStack Multi Client View
    Multi Client View //
    2026-07-20

InboxStack is an email deliverability intelligence platform built for teams who need to know why their emails aren't reaching the inbox โ€” not just that they aren't. At its core is Brain, a proprietary causal AI engine trained on a 22-year deliverability knowledge base, which correlates signals across your ESP, DNS authentication records (SPF, DKIM, DMARC), Google Postmaster Tools, Microsoft SNDS, and 50+ blocklists to pinpoint root causes instead of surfacing raw metrics.

Most deliverability tools stop at monitoring: they show you a drop in inbox placement or a blocklist hit and leave you to investigate. InboxStack goes further, tracing the actual causal chain โ€” a DKIM misalignment, a reputation dip on a specific sending IP, a content trigger โ€” so you can fix the real problem instead of guessing.

Setup takes minutes with no migration required: forward your email headers for an instant DNS/authentication audit, or connect your existing ESP and Postmaster accounts for ongoing monitoring. Optional seed testing gives you real inbox-vs-spam placement data across major providers.

Built for agencies managing multiple client domains and growing companies who've outgrown basic authentication checkers, InboxStack turns deliverability from a black box into a diagnosable, fixable system.

Mailmeteor

$ Details
freemium $9.99 / Monthly (1 User, Up to 2000 mails per day)
Platforms
GMail
Release Date
2018 December

InboxStack

$ Details
freemium $49.0 / Monthly
Platforms
Web
Release Date
2026 May
Startup details
Country
India
State
karnataka
City
Bengaluru
Employees
1 - 9

Mailmeteor features and specs

  • Ease of Use
    Mailmeteor integrates seamlessly with Google Sheets and Gmail, allowing users to send personalized bulk emails directly from their Google accounts without requiring extensive technical knowledge.
  • Customization
    Mailmeteor allows for high levels of email personalization through the use of placeholders in the email templates, which helps in creating more engaging and tailored communications.
  • Affordability
    Compared to other bulk email services, Mailmeteor offers cost-effective pricing options, including a free plan with basic features, making it accessible for small businesses and individuals.
  • Privacy Compliance
    Mailmeteor ensures user data remains private by sending emails directly from the user's Gmail account without storing email data on external servers.
  • Tracking Performance
    The tool provides features for tracking email open rates and clicks, enabling users to measure the performance of their email campaigns.
  • No Daily Sending Limits
    Mailmeteor doesn't impose its own daily sending limits; rather, it adheres to Gmail's sending limits which are fairly generous, allowing for substantial email campaigns.

InboxStack features and specs

  • Inboxstack Brain
    Root-cause AI analysis (Brain)
  • Email Audit
    DNS/SPF/DKIM/DMARC authentication audit
  • DMARC Monitoring
    DMARC report monitoring
  • Deliverability Monitoring
    Google Postmaster, SNDS, Senderscore monitoring
  • Blacklist Monitoring
    50+ blocklist monitoring
  • Seed Testing
    Seed testing & inbox placement tracking
  • Warm-up
    Warmup plan and monitor
  • ESP Dashboard
    Multi ESP view dashboard

Analysis of Mailmeteor

Overall verdict

  • Mailmeteor is a highly recommended tool for users seeking an easy-to-use and efficient mail merge solution. Its seamless integration with Gmail and comprehensive features make it a reliable choice for conducting email campaigns. While it may lack some advanced features of dedicated email marketing platforms, it perfectly suits the needs of those who prioritize ease of use and integration with Google's ecosystem.

Why this product is good

  • Mailmeteor is often praised for its simplicity and effectiveness in sending personalized emails through Gmail. It is known for its user-friendly interface, affordability, and features like mail merge, which help users efficiently reach large audiences. Its integration with Google Workspace makes it a convenient tool for users who are already familiar with using Google products. Additionally, Mailmeteor offers tracking capabilities to monitor the success of email campaigns, making it a robust solution for both individual users and businesses aiming to engage with their audiences on a more personal level.

Recommended for

  • Small businesses looking to streamline their email communication with customers.
  • Educational institutions needing to send personalized emails to students or parents.
  • Freelancers and professionals who frequently send bulk, personalized emails.
  • Organizations already using Google Workspace and seeking a compatible email solution.
  • Individuals who require a straightforward tool to manage and track email campaigns.

Mailmeteor videos

Mailmeteor - Product demo

More videos:

  • Review - Mailmeteor - Product Tour

InboxStack videos

No InboxStack videos yet. You could help us improve this page by suggesting one.

Add video

Category Popularity

0-100% (relative to Mailmeteor and InboxStack)
Email Marketing
100 100%
0% 0
Reputation Management
0 0%
100% 100
Email
91 91%
9% 9
Email Productivity
89 89%
11% 11

User comments

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Reviews

These are some of the external sources and on-site user reviews we've used to compare Mailmeteor and InboxStack

Mailmeteor Reviews

  1. Pierre Dubuc
    ยท CMO at OCR ยท
    Great mail merge tool for Gmail

    Very handy mail merge solution. I send emails right from my google spreadsheet and it takes a few minutes to go out!

    ๐Ÿ Competitors: Yet Another Mail Merge (YAMM)

Best Respona alternatives for your SEO agency17 min read
Rated an impressive 4.9/5 from over 10,000 reviews, this platform offers everything you need to create impactful email campaigns seamlessly. With Mailmeteor, you can send mass emailsโ€”up to 2,000 emails a dayโ€”directly from your Gmail or Microsoft Outlook, making it a breeze to reach your audience effectively.

InboxStack Reviews

We have no reviews of InboxStack yet.
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Social recommendations and mentions

Based on our record, Mailmeteor seems to be more popular. It has been mentiond 60 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.

Mailmeteor mentions (60)

  • Mass email with attached PDF
    The only thing is that I need to send some emails with an attached PDF (2MB), but using Mailmeteor you have to pay to be able to use the attach file function. Does anyone know an alternative to send attached files via a no-cost alternative? Source: about 3 years ago
  • One off email sequences
    One option would be to use a customer relationship management (CRM) tool that allows you to create email templates and automate follow-up emails. Many CRM tools have this functionality built-in, so you can easily customize your emails with the job title, recipient's name, and company name. You can then set up the CRM to automatically send follow-up emails at predetermined intervals. Another option would be to use... Source: over 3 years ago
  • How to Contact a Lot of People at Once through Email
    Once you have the spreadsheet of emails, there are two routes you can go about to send personalized emails. The easier way, and the way I recommend, is to use software that does this for you, like MailMeteor. While you have to pay a little bit for the premium account, I highly recommend it as it allows you send up to 2000 emails a day, personalized based on the columns in your spreadsheet that you connect to it... Source: over 3 years ago
  • Cold Email Mastery - Cold Email Wizard Opinions?
    Also recommending Mailmeteor as a great alternative to Lemlist and YAMM. Source: about 4 years ago
  • PR cold emailing tools- Please suggest!
    Recommending Mailmeteor as a great PR cold emailing tool. It will help you contact journalists at scale while still personalize your emails. Source: about 4 years ago
View more

InboxStack mentions (0)

We have not tracked any mentions of InboxStack yet. Tracking of InboxStack recommendations started around Jul 2026.

What are some alternatives?

When comparing Mailmeteor and InboxStack, you can also consider the following products

GMass - GMass allows you to easily schedule emails, send out mass emails and mail merge campaigns and more with Gmail! Click here to learn about more features!

GlockApps - G-Lock Apps is an interesting tool that might seem simple to some, but is quite essential to most online marketers.

lemlist - The prospecting tool to automate multichannel outreach & actually get replies.

Email Testing By Inbox Pirates - Preview, Analyze & Test emails with one click.

Yet Another Mail Merge - The perfect mail merge tool for Gmail

Validity LLC - Founded in 2010, located in Essex Countyโ€™s City of Orange, NJ, and serving all 50 states of the U.S., Validity, LLC is considered a โ€œOne Stop Shopโ€ for ...