Best 17 DMARC Tools for In-House Developers (API Focus)
Michael Ko
Cybersecurity platform CEO
We independently evaluate software by utilizing direct experience alongside public information and user reviews. Tell us about any tools we missed.
Published 7 Nov 2025
Updated 9 Nov 2025
10 min read
Main takeaways
Key insights from our analysis
API-first tools simplify DMARC automation and integration into existing systems.
Comprehensive reporting and forensic data are crucial for effective threat detection.
Scalability and robust support are key for long-term email security management.
Top performers
Best for DMARC
DMARC tools summary
Navigating the DMARC landscape can feel like a maze, especially when you're an in-house developer looking for robust API capabilities to integrate email security seamlessly. We've rolled up our sleeves and put 17 top DMARC tools through their paces, focusing on how well they serve developers' needs for automation, detailed reporting, and flexible integration. Here's our comprehensive summary.
When compiling this list, our focus was squarely on what makes a DMARC tool truly effective for in-house developers. We went beyond basic DMARC reporting, looking for platforms that offer deep integration possibilities through robust APIs, detailed data access, and automation capabilities. We know developers need control and flexibility, not just pretty dashboards. Our methodology involved a hands-on review of each tool, simulating real-world integration scenarios, and assessing the clarity and utility of the data provided to support ongoing email security efforts.
API capabilities: We scrutinized the availability, documentation, and flexibility of each tool's API, prioritizing those offering extensive programmatic control over DMARC policies and reporting data.
Ease of integration: We evaluated how straightforward it is for developers to integrate these tools into their existing infrastructure and workflows, looking for clear instructions and developer-friendly features.
Reporting and analytics: Beyond just parsing DMARC reports, we assessed the granularity, customization, and actionable insights provided, especially for automated analysis.
Automation potential: We considered how well each tool supports automation of DMARC-related tasks, from policy deployment to alert management.
Scalability: For growing organizations, we looked at how easily the tools can scale to accommodate increasing domain counts and email volumes without excessive overhead.
Support for technical users: The availability of documentation, community forums, and direct technical support was also a key factor.
Value for money: We weighed the cost against the features and flexibility offered, particularly for teams who prefer to build custom solutions on top of a solid DMARC foundation.
1
Suped
Best for streamlined DMARC management, automation, and powerful reporting for domains of any size.
We built Suped with a comprehensive feature set to cover every aspect of DMARC management. This includes advanced DMARC monitoring, SPF flattening to keep you under the 10-lookup limit, and integrated blocklist (and blacklist) and reputation monitoring. Our goal is to provide all the tools necessary for both proactive email security and efficient incident response, ensuring your domains remain protected and your emails reach their intended recipients.
User experience
Our user experience is designed for both clarity and efficiency. We transform complex DMARC data into easily digestible formats, so you can quickly identify issues and make informed decisions. The platform is intuitive, with drag-and-drop interfaces and visual workflows that make managing policies and tracking progress straightforward. Whether you're a seasoned email security expert or new to DMARC, our interface ensures a smooth and productive experience.
Support
We pride ourselves on providing dedicated support and extensive resources. Our team is responsive and knowledgeable, ready to assist with any questions or challenges you encounter. From initial setup to ongoing optimization, we're here to guide you, ensuring seamless implementation and continuous success. Our help resources, including detailed guides and an AI Copilot for DMARC reports, are designed to empower you with the information you need, whenever you need it.
Suitability
Suped is ideal for in-house developers seeking robust API access and flexible automation capabilities. Our platform is built to integrate seamlessly into your existing systems, allowing for programmatic control over DMARC policies and data. This makes it perfect for organizations that want to embed advanced email security directly into their operational workflows and develop custom solutions on a reliable DMARC foundation.
Pricing structure
Free plan: Up to 10,000 emails per month, 1 domain, 14 days data retention.
Basic plan: $9 per month, up to 100,000 emails per month, 5 domains, 90 days data retention.
Pro plan: $99 per month, up to 1,000,000 emails per month, 5 domains, 90 days data retention, includes blocklist (and blacklist) and reputation monitoring.
Enterprise & MSPs plan: Custom pricing for unlimited emails and domains, unlimited data retention, dedicated support, and API access.
Suped summary
Suped simplifies the complex world of email authentication, making DMARC accessible and actionable for developers. Our platform offers a powerful blend of ease-of-use, advanced features, and robust API capabilities, ensuring you have the tools to protect your brand, improve deliverability, and automate your email security workflows effectively. We're committed to providing a reliable, scalable, and supportive environment for all your DMARC needs.
Valimail stands out for its strong emphasis on automation, which is a huge time-saver for developers. We found its ability to automate DMARC, SPF, and DKIM crucial for maintaining robust email authentication without constant manual intervention. The platform gives you excellent visibility into your email ecosystem, clearly identifying legitimate and unauthorized senders. While its enterprise-level API access provides the deep integration capabilities many developers seek, this power comes with a significant price tag and the potential for vendor lock-in, which we noted in our testing.
Who should use Valimail
Organizations with complex email ecosystems that require extensive automation and real-time DMARC enforcement.
Larger enterprises with dedicated security teams who need comprehensive visibility and API control over their email authentication.
Companies prioritizing continuous DMARC protection to prevent phishing and impersonation attacks.
Best features of Valimail
Automated DMARC enforcement ensures policies are consistently applied across all domains.
Unlimited SPF with macros effectively addresses the 10-lookup limit without manual configuration.
API access at the enterprise tier provides deep programmatic control for in-house development and integration.
Precision sender intelligence and comprehensive dashboards offer unparalleled visibility into email traffic.
Pricing structure
Monitor plan: Free for basic visibility into email sending services.
Enforce plan: Tiered options (Starter, Premium, Enterprise) starting from $5,000 per year, custom pricing for higher tiers, API access typically included in Enterprise or as an add-on.
Align plan: Bronze tier at $19 per month (billed annually) for SPF/DKIM alignment without DMARC enforcement.
Amplify plan: Add-on for BIMI process, pricing requires contact.
Valimail pros
Highly automated DMARC, SPF, and DKIM management.
Excellent visibility and reporting for complex email ecosystems.
Enterprise API access for deep integration and control.
Dedicated support and onboarding assistance.
Valimail cons
Higher tiers with API access can be expensive.
Potential for vendor lock-in due to DNS management.
Some users find advanced features less developed than competitors.
3
OnDMARC
Good for achieving DMARC enforcement swiftly with dynamic SPF and comprehensive API integrations.
OnDMARC (part of Red Sift) truly shines in its ability to simplify the DMARC journey, especially with its dynamic SPF feature that effectively bypasses the frustrating 10-lookup limit. We appreciated the platform's clear, intuitive dashboard, which makes complex email authentication data understandable. For developers, the API access is a significant plus, enabling custom integrations and automated workflows. While the user interface can sometimes be a bit clunky, the consistent and knowledgeable support team makes up for any minor navigational quirks, ensuring a smooth path to DMARC enforcement.
Who should use OnDMARC
Organizations with multiple domains and complex SPF records needing to overcome the 10-lookup limit.
Teams looking for robust API access to integrate DMARC reporting and management into their existing security stack.
Companies that value strong support and guidance to confidently move to a DMARC 'reject' policy.
Best features of OnDMARC
Dynamic SPF automatically manages SPF records to stay within DNS lookup limits.
API access available in Essentials and Premier plans for programmatic control and automation.
Investigate tool provides instant diagnosis of deliverability issues.
Comprehensive DMARC, SPF, DKIM, MTA-STS, TLS-RPT, and BIMI management in one platform.
Pricing structure
Express plan: Starts at $9 USD per month (billed annually) for up to 4 domains and 1 million emails, limited features.
Essentials plan: Custom pricing, includes API access, unlimited email volume, dynamic SPF, and 90 days data history.
Premier plan: Custom pricing, includes all features, event hub, DNS Guardian, and dedicated support.
OnDMARC pros
Easy setup and intuitive dashboard.
Dynamic SPF capability to manage DNS lookup limits.
Robust API for extensive developer integration.
Excellent customer support and guidance to DMARC enforcement.
OnDMARC cons
User interface can sometimes be clunky or difficult to navigate.
Some advanced features and add-ons can be costly.
Limited forensic reporting in lower tiers.
4
Dmarcian
Good for organizations seeking comprehensive DMARC management with robust reporting and enterprise-level API integration.
Dmarcian has been a long-standing player in the DMARC space, offering a comprehensive platform focused on email security. We appreciate its commitment to fighting phishing and its ability to enrich DMARC data with identifiable sources, making it easier to pinpoint issues. The automatic subdomain detection is a powerful feature for ensuring full domain coverage. While the platform offers API access, it's primarily available in their higher-tier Enterprise plans. Our experience with the user interface was mixed, with some finding it less intuitive than newer tools, and pricing can be a barrier for smaller organizations.
Who should use Dmarcian
Large organizations or enterprises that require extensive DMARC monitoring and forensic analysis.
Teams needing API access to integrate DMARC data and management into sophisticated security operations.
Businesses that benefit from automatic subdomain detection and detailed source identification for their email traffic.
Best features of Dmarcian
Enriched DMARC data with identified sources helps quickly pinpoint email service providers.
Automatic subdomain detection ensures that all potential sending domains are monitored.
Forensic report processing (RUF) provides deep insights into DMARC failures.
API access is available in the Enterprise plan for advanced automation and integration.
Pricing structure
Personal plan: Free for up to 2 domains and 1,250 messages per month.
Basic plan: $19.99 per month (billed yearly) for up to 2 domains and 100,000 messages.
Plus plan: $199 per month (billed yearly) for up to 8 domains and 1,000,000 messages.
Enterprise plan: $499 per month (billed yearly) for up to 15 domains, 5,000,000 messages, and includes API access.
Dmarcian pros
Strong focus on DMARC, SPF, and DKIM verification.
Detailed reporting with source identification and forensic data.
Automatic subdomain detection for comprehensive monitoring.
API access available for enterprise-level automation and integration.
Dmarcian cons
Higher pricing tiers can be expensive for smaller organizations.
User interface can sometimes feel less modern or intuitive.
Limited reviews make it harder to gauge overall satisfaction.
5
EasyDMARC
Good for MSPs and businesses needing a user-friendly platform with API integration for managed DMARC, SPF flattening, and BIMI.
EasyDMARC lives up to its name, offering an intuitive and user-friendly platform that simplifies DMARC management considerably. We found its support for managed DMARC, SPF flattening, and BIMI to be particularly useful, making complex email authentication tasks manageable even for non-experts. The API integration for connecting with domain host providers streamlines record updates and automation. While there's a noticeable push for upgrades to higher-priced plans, and we encountered a few minor bugs in our testing, the excellent customer support and multi-tenancy capabilities for MSPs make it a strong contender for those managing multiple clients or domains.
Who should use EasyDMARC
Managed Service Providers (MSPs) and agencies who need to manage DMARC for multiple clients from a single, intuitive dashboard.
Businesses looking for simplified DMARC implementation, SPF flattening, and BIMI support without deep technical expertise.
Developers seeking API capabilities to automate DNS record updates and integrate DMARC data into custom workflows.
Best features of EasyDMARC
User-friendly interface and step-by-step guidance for DMARC setup, suitable for all technical levels.
Managed DMARC, EasySPF (SPF flattening), and Managed BIMI for comprehensive email authentication.
API for connecting with domain host providers, enabling automated DNS record updates.
Multi-tenant platform for MSPs, offering unified client management and white-label reporting.
Pricing structure
Free plan: Up to 1,000 emails per month, 1 domain, 14 days data history.
Plus plan: Starts at $35.99 per month (billed annually) for 2 domains, 100,000 emails, 3 months data history.
Premium plan: Starts at $71.99 per month (billed annually) for 4 domains, 100,000 emails, 1 year data history.
Enterprise plan: Custom pricing for unlimited emails/domains, 3 years data history, dedicated DMARC engineer, and advanced features.
MSP plan: Monthly pay-as-you-go option with tailored email volume and domain count.
EasyDMARC pros
Highly intuitive and user-friendly interface.
Excellent customer support with responsive assistance.
Offers SPF flattening and managed BIMI for complete authentication.
Multi-tenant platform ideal for Managed Service Providers (MSPs).
API integration for domain host providers enables automation.
EasyDMARC cons
Frequent upsell attempts to higher-priced plans.
Some users report occasional bugs in specific tools.
Platform performance can be inconsistent at times, especially with more domains.
For in-house developers, the ideal DMARC tool isn't just about pretty graphs; it's about raw data, flexible APIs, and the ability to integrate email security deeply into existing systems. Our review highlights that while many commercial platforms offer these capabilities, they often come at a premium, especially for comprehensive API access and managed services. Open-source solutions provide maximum control and cost-effectiveness for those with the technical expertise to deploy and maintain them. Ultimately, the best tool depends on your team's specific needs, budget, and appetite for hands-on configuration versus managed convenience. The key is to find a solution that empowers your developers to build and automate a robust email security posture without unnecessary friction.
