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DMARC Digests by Postmark vs InboxMonster

Choose Postmark DMARC Digests for simple DMARC, or InboxMonster for comprehensive deliverability.
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Compare product functionality

Feature set

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DMARC Digests by Postmark is a highly specialized tool, laser-focused on DMARC reporting. It provides core DMARC aggregation and visualization, allowing us to quickly see which email sources are authenticating correctly and which are not. This dedicated approach means we get clear, concise data specific to DMARC compliance.
We appreciate its simplicity in helping us understand DMARC pass/fail rates, identify senders, and see our DMARC policy's impact. It's built for those whose primary concern is achieving and maintaining DMARC enforcement without the noise of broader deliverability metrics.
InboxMonster offers a much broader suite of tools, extending well beyond just DMARC into overall email and SMS deliverability. While it includes robust DMARC monitoring, its strength lies in providing a holistic view of email performance, covering aspects like inbox placement, blocklist (or blacklist) monitoring, and reputation analysis.
We found that InboxMonster is designed for teams that need comprehensive insights into every aspect of their email program, from pre-send creative proofing to real-time campaign performance and post-send deliverability. It's a complete package for managing the health of an entire sending infrastructure.
How easy is each product to use

User experience

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Using DMARC Digests by Postmark is incredibly straightforward. Its user interface is clean, intuitive, and gets right to the point. For anyone new to DMARC or who prefers a minimalistic approach, this platform is a breath of fresh air, eliminating complexity and focusing solely on what's essential for DMARC.
We found that getting set up and understanding the reports was a breeze, with minimal learning curve. The streamlined design means we can quickly check our DMARC status, identify issues, and take action without navigating through extraneous features.
InboxMonster, given its comprehensive nature, has a more extensive interface. While powerful, some users might find the initial learning curve steeper due to the sheer number of features and data sets available. However, once we got accustomed to it, we appreciated the depth of insight it provides.
The platform aims to be a one-stop shop for deliverability, meaning there are many tabs and dashboards to explore. Its UI is designed for email professionals who need detailed control and analysis across various aspects of their email and SMS programs.
Which product has the best support

Support

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Postmark is renowned for its excellent customer support, and DMARC Digests benefits from this reputation. We consistently experienced friendly human support, which is invaluable when dealing with technical aspects of email authentication. The team provides clear, actionable guidance.
For a focused DMARC tool, the support quality is more than adequate, ensuring we can resolve any DMARC-related queries or issues efficiently. It's reliable and responsive, aligning with Postmark's commitment to user satisfaction.
InboxMonster prides itself on its 'white glove set up' and proactive customer support, and we found this to be largely true. Many reviews highlight the hands-on approach of their account managers, who often provide actionable insights and help troubleshoot complex deliverability issues.
The support is often described as a true partnership, with dedicated individuals who are deeply knowledgeable about the email ecosystem. This level of personalized assistance is particularly beneficial for enterprise clients navigating intricate deliverability challenges.
Who should use each product

Suitability

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DMARC Digests by Postmark is best suited for small to medium-sized businesses (SMBs) or individual users who primarily need a focused, easy-to-use DMARC reporting solution. It's ideal if your main goal is to secure your domain with DMARC without needing a broader suite of deliverability tools.
It's less suited for large enterprises or Managed Service Providers (MSPs) that require multi-tenancy, extensive custom reporting, or a wide array of deliverability features beyond DMARC. Its simplicity and per-domain pricing make it accessible for those starting their DMARC journey.
InboxMonster is designed for mid-market to enterprise-level organizations and MSPs that require a comprehensive email and SMS deliverability platform. Its extensive feature set, detailed reporting, and hands-on support make it suitable for teams managing complex sending infrastructures and high-volume campaigns.
For MSPs, the platform's capabilities for monitoring multiple clients, combined with expert consultation, offer significant value. SMBs might find its feature set and pricing more than they need, but for larger entities focused on maximizing inbox placement and reputation across all channels, it's a strong contender.

How does DMARC Digests by Postmark compare with InboxMonster?

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DMARC report analysis
Source detection
Forward detection
Spoof detection
Notifications and alerts
Reporting
API
Multi-tenancy
SPF flattening
Hosted DMARC
BIMI
MTA-STS/TLS-RPT
Blocklists and reputation
AI copilot
DNS monitoring
Self hostable
Free trial/free tier

Drawbacks and what to watch out for

DMARC Digests by Postmark is a focused tool, which is both a strength and a drawback. Its main limitation is that it doesn't offer broader email deliverability features like inbox placement testing or general reputation monitoring, which are essential for a complete email program. InboxMonster, on the other hand, can be perceived as expensive, with its entry-level deliverability suite starting at a significant annual fee. Its extensive feature set can also lead to a steeper learning curve, making it potentially overwhelming for users who only need basic DMARC monitoring.
We have pulled the average ratings from G2 for each product, and also included the most recent negative reviews for each product in full. Positive reviews tend to have less detail and have a higher chance of being fraudulent, so negative reviews are a better signal for your decision.
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No G2 reviews
G2 is the most popular review platform for DMARC products, so this is a strong signal that this product is not popular.
Josie + InboxMonster has helped our email team tremendously!
I'm newer to the email team that utilizes InboxMonster but from what I've gathered from my coworker who has worked with Josie and InboxMonster for over a year, Josie was instrumental in providing actionable insights to enhance deliverability. We don't have a proper CRM tool to leverage so InboxMonster isn't as much a problem as the tool we're using for email. At the beginning of the year, the team discussed solutions such as better domain/IP allocation, stricter demark policies, and monitoring iCloud; they also noted the impact of email frequency and rogue franchisees on complaint rates. Next steps included investigating unsubscribe inconsistencies, exploring click activity data, discussing IP address optimization, and a future demo of Inbox Monster's "Creative Projects" tool; Josie Garcia will also provide further ISP and deliverability information. Most recently, Josie shared SendGrid-specific recommendations, best practices, and provided platform training, including user management, notifications, campaign tagging, subscriber insights, and spam trap analysis.
Verified User in Maritime
Small-Business (50 or fewer emp.)
Great toolset and helpful account support
The toolset is very robust and they are consistently adding to the functionality. The account support has also been great and incredibly proactive. Thom is the best and always super helpful. Right now, there is nothing currently that I do not like or appreciate about Inbox Monster. Inbox Monster is helping us manage and get insight into deliverability problems when they arise. There is a great toolset that is built behind this management and the additional tools with respect to content rendering is super helpful.
Verified User in Publishing
Mid-Market (51-1000 emp.)
Valuable Deliverability Insights
Inbox Monster provides a lot of valuable insights into how are email deliverability is across many different email service providers. Inbox Monster has many features and data sets, but not all of the data feels immediately actionable and I don't understand what every feature does. Before Inbox Monster, we couldn't see where our emails were landing or what seeds were having deliverability issues.
Verified User in Higher Education
Mid-Market (51-1000 emp.)
A Game-Changer for Email Deliverability
Inbox Monster has been a life saver for our email program. We have worked with Josie for just under a year, but the amount of dedication and support she provided to analyze our deliverability, help us come up with an action plan to remediate our poor deliverability and sender reputation, and ongoing monitoring of trends after working through our issues, has played a significant role in the health and success of our email marketing. Josie is always quick to respond and will walk through the issues with us, giving us valuable insights and recommendations along the way. My team does not have a strong background in deliverability, but Josie and the Inbox Monster team, has made a very technical part of email marketing very easy to understand and action against, allowing us to grow our skillset while also educating the rest of the company on deliverability best practices to ensure we do not fall into the same mess that we worked so hard to pull ourselves out of. In October 2024, we found out, with the help of Inbox Monster, that our inbox rate with Gmail was at 1% with low sender reputation. After working with Josie, we were able to increase and maintain our Gmail inbox rate to 95-100% with high sender reputation within 4 months. I cannot recommend Inbox Monster enough. Email deliverability is overwhelming. This is not an Inbox Monster issue. The team at Inbox Monster is incredibly knowledgeable and gives so much information. A lot of the time, the analysis is easy to follow while meeting with the Inbox Monster team, but the amount of numbers and tabs within the platform make it a little difficult to follow on our own. We have a wonderful support team who are willing to meet at our cadence to discuss, but it's a bit difficult to do our own analysis outside of those meetings. Inbox Monster helps provide valuable insight to our email deliverability and sender reputation.
Verified User in Health, Wellness and Fitness
Enterprise (> 1000 emp.)
Great tool with excellent consulting support
Clear reporting to understand our deliverability/inboxing, as well as domain/IP reputation factors. And the consulting services offered save us a ton of time, as they leverage existing relationships with email providers to troubleshoot/address inboxing issues. Super easy to use and onboard as well. Everything is worth it, but the tool costs more than other deliverability platforms, however, that's largely because they are taking on the work of coordinating with email providers They offer a one-stop shop of crucial information to understand our sending domain/ip health, and most importantly, offer services that help us work with email providers quickly and effectively. This saves our team a ton of time we would otherwise have to spend coordinating with each ESP
Brandon G.
Senior Manager, Marketing Operations Mid-Market (51-1000 emp.)

Pricing

DMARC Digests by Postmark uses a simple per-domain pricing model, while InboxMonster offers tiered annual suites with significantly higher starting costs.
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Small
$14 / month / domain
Contact for pricing
Medium
$14 / month / domain
Contact for pricing
Large
$14 / month / domain
Contact for pricing
Enterprise
$14 / month / domain
Starts at $15k / year (Deliverability Suite)

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Still not satisfied with DMARC Digests by Postmark or InboxMonster?
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What makes Suped different

Automated sender discovery that finds shadow IT and third-party services
DMARC copilot that pinpoints failures and prescribes the exact fix
Guided path to full p=reject enforcement, safely and quickly
Proactive alerts to prevent misconfigurations before they block your mail
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Frequently asked questions

    DMARC Digests by Postmark vs InboxMonster DMARC product review - Compare DMARC products - Suped