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InboxMonster vs DMARC-SRG

Choose InboxMonster for comprehensive deliverability, choose DMARC-SRG for a self-hosted DMARC solution.
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DMARC-SRG
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DMARC-SRG
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Compare product functionality

Feature set

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DMARC-SRG
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InboxMonster provides a robust suite of features designed for comprehensive email deliverability management. We found it excels in offering detailed insights into inbox placement, spam trap monitoring, and reputation analysis across various internet service providers (ISPs). Its capabilities extend beyond basic DMARC reporting, integrating tools for creative proofing, device rendering, and real-time campaign diagnostics.
Furthermore, the platform's focus on proactive monitoring and actionable insights means we consistently receive timely data. It allows us to dive deep into metrics like Apple and Gmail AI summaries and accessibility analysis, providing a holistic view of email performance before and after sending. The reporting features are highly customizable, enabling tailored views for different stakeholders.
DMARC-SRG is primarily a PHP parser and report generator for DMARC aggregate reports. Its feature set is much narrower, focusing on parsing incoming XML DMARC reports and presenting them in a human-readable format. We observed that it effectively shows DMARC authentication results, including SPF and DKIM pass/fail rates, and identifies sending sources.
While DMARC-SRG is excellent for its core purpose, its functionality does not extend to broader email deliverability aspects like inbox placement testing, spam trap monitoring, or reputation management. It's a tool for specific DMARC data aggregation and visualization rather than a full-fledged deliverability platform. Users will need to manage the hosting and environment themselves.
How easy is each product to use

User experience

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DMARC-SRG
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We found InboxMonster's user interface to be intuitive and generally easy to navigate, especially considering the depth of data it presents. While there can be a slight learning curve initially due to the sheer volume of features and data sets, the layout is logical and designed for efficiency. Campaign tagging, subscriber insights, and spam trap analysis are readily accessible.
The platform prioritizes clear reporting, enabling quick understanding of deliverability and domain/IP reputation factors. We particularly appreciate the shareable custom reports, which simplify collaboration with team members and clients. Any initial confusion we experienced was quickly resolved thanks to the platform's design and available support, making the overall experience positive.
DMARC-SRG offers a very different user experience, as it's a self-hosted PHP application. The initial setup requires technical expertise, including setting up a web server, PHP, and a database to store parsed DMARC reports. This isn't a plug-and-play solution; it demands hands-on configuration.
Once set up, the interface is functional for its purpose, displaying DMARC reports in a straightforward manner. However, it lacks the polish, advanced visualizations, and interactive elements common in commercial SaaS platforms. Users accustomed to managed services might find the self-hosting and manual management aspects less convenient, but those with technical skills will appreciate the direct control.
Which product has the best support

Support

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DMARC-SRG
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InboxMonster is widely praised for its exceptional customer support. We've consistently experienced proactive and highly responsive assistance from their team of experts. They offer a "white glove setup" and often provide real-time platform support, monthly check-ins, and proactive flagging of potential issues.
The support extends to working directly with ISPs to troubleshoot and address inboxing issues, saving significant time. Users frequently highlight the team's knowledge of best practices, ESP policies, and reputation recovery, making the support a crucial part of the service. This level of personalized guidance is a significant differentiator.
DMARC-SRG, being an open-source project hosted on GitHub, does not offer dedicated customer support in the traditional sense. Users rely on community support, documentation provided in the repository, and their own technical capabilities to resolve issues or implement new features. We found that questions can be posted on GitHub issues, but there's no guaranteed response time or personalized assistance.
This model means that while the core tool is free, the support burden falls entirely on the user or their internal IT team. For organizations without strong technical resources, this lack of formal support could be a significant hurdle. It's a classic trade-off between cost and comprehensive assistance.
Who should use each product

Suitability

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InboxMonster is best suited for mid-market to enterprise-level organizations, particularly those with high email volumes or complex email marketing programs. Its comprehensive feature set and dedicated support make it ideal for businesses where email deliverability directly impacts revenue and customer engagement. We've seen it benefit e-commerce, financial services, and health and wellness sectors.
For Managed Service Providers (MSPs), InboxMonster offers valuable insights and proactive monitoring that can be leveraged across multiple clients, although specific multi-tenancy features might vary by plan. SMBs might find the pricing steep, but those with critical email operations could still justify the investment for its robust capabilities and expert guidance.
DMARC-SRG is primarily for technically proficient individuals or organizations, including MSPs with strong internal IT teams, or even smaller businesses (SMBs) willing to self-host and manage their DMARC reporting infrastructure. It's a cost-effective solution for those who need basic DMARC report parsing without the bells and whistles of a commercial platform.
It is less suitable for enterprise environments that require extensive features, high scalability, and dedicated support without significant internal development. MSPs leveraging DMARC-SRG would need to build their own management and alerting layers on top of it. It serves a niche for those prioritizing control and minimal cost over extensive features and managed services.

How does InboxMonster compare with DMARC-SRG?

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DMARC-SRG
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

InboxMonster's primary drawback for some users might be its cost, which is positioned at a higher tier than many alternatives, particularly for smaller organizations. While its feature set is extensive, the sheer volume of data and options can sometimes overwhelm users who are not deep deliverability experts, requiring reliance on their strong support team for interpretation. DMARC-SRG, on the other hand, faces limitations common to open-source, self-hosted solutions. Its setup requires significant technical knowledge, and the lack of dedicated support means that troubleshooting and advanced feature implementation fall squarely on the user. Its functionality is also very narrow, lacking many of the comprehensive deliverability features offered by commercial platforms.
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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DMARC-SRG
Josie + InboxMonster has helped our email team tremendously!
What do you like best about Inbox Monster? 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. What do you dislike about Inbox Monster? 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. What problems is Inbox Monster solving and how is that benefiting you? 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.)
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.
Great toolset and helpful account support
What do you like best about Inbox Monster? 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. What do you dislike about Inbox Monster? Right now, there is nothing currently that I do not like or appreciate about Inbox Monster. What problems is Inbox Monster solving and how is that benefiting you? 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
What do you like best about Inbox Monster? Inbox Monster provides a lot of valuable insights into how are email deliverability is across many different email service providers. What do you dislike about Inbox Monster? 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. What problems is Inbox Monster solving and how is that benefiting you? 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
What do you like best about Inbox Monster? 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. What do you dislike about Inbox Monster? 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. What problems is Inbox Monster solving and how is that benefiting you? 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
What do you like best about Inbox Monster? 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. What do you dislike about Inbox Monster? 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 What problems is Inbox Monster solving and how is that benefiting you? 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

InboxMonster offers comprehensive, high-value plans with a significant annual investment, while DMARC-SRG is an open-source solution, effectively free to use but requiring self-management.
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DMARC-SRG
Small
Starting at $3,000 yearly (Creative Suite)
Free (self-hosted)
Medium
Starting at $3,000 yearly (Creative Suite), $15,000 (Deliverability Suite)
Free (self-hosted)
Large
Starting at $15,000 yearly (Deliverability Suite)
Free (self-hosted)
Enterprise
Contact for pricing (Custom pricing available)
Free (self-hosted)

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DMARC-SRG
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