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Inbox Monster Custom QA: Email QA That Plays By Your Rules

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Inbox Monster

01 Jun 2026

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Nearly every email marketer has experienced what we call QA chaos: the countless revisions, never-ending back-and-forths and those “wait…did anyone check that?” moments before send.

Getting an email to the finish line can be exhausting. When we built the Creative Suite, our goal was to streamline the entire pre-send workflow. And now we’ve made the experience even better with Custom QA.

Introducing Inbox Monster’s Custom QA

Instead of wasting valuable time on manual and inefficient review processes, Inbox Monster’s Custom QA empowers teams to tailor their email testing to their brand’s unique needs. 

Custom QA lets you create specialized rule catalogs for brand standards, design requirements, legal disclaimers, compliance checks and more—all within a single workflow.

Inbox Monster's Custom QA allows you to create your own rules to align with your brand standards.

You can start with 80+ common rules with email best practices baked in, then customize your own ruleset to match the way your team works. Every email is automatically analyzed against this custom ruleset, with issues flagged so you can fix them lightning-fast.

Testing and QA are often the most manual, cumbersome part of an email marketer’s workflow. Custom QA gives teams the confidence to send faster without sacrificing quality or accuracy. With nothing else like it in the market today, we truly believe this is the future of email QA.” ~ Matt McFee, Managing Director of Inbox Monster.

But that’s not all you get with Custom QA. You now get the power of Sendability.

Before Deliverability, Think Sendability

Deliverability is all about whether an email landed in the inbox as intended. But it’s only one half of the equation. Testing and QA are essential to determine whether an email should be sent in the first place—what we call SendabilityTM.

What sets Inbox Monster’s Custom QA apart from other email testing platforms is our proprietary SendabilityTM Score, which helps teams quickly understand whether an email is ready for deployment. After an email is analyzed against an organization’s custom ruleset, Inbox Monster generates the Sendability Score based on how well that message meets those standards.

“Looks fine to me” isn’t a QA strategy. Our Sendability Score is like your email’s final exam that it’s good to go.

What’s Included in Custom QA

With Inbox Monster’s Creative Suite, email marketers can cut their QA time in half, collaborating with their teams in real time, testing interactive content and rendering across 110+ modern clients and devices. 

In addition to offering Custom QA, the suite encompasses a comprehensive toolset, including AI summaries, live previews, image diagnostics, accessibility checks, and language translation. With unlimited seats, you can bring your whole team to proof, review and approve what gets sent.

Inbox Monster Custom QA

  • Create custom QA rules that match an organization’s unique testing needs for brand, design, legal, compliance and more
  • Choose from a set of 80+ common rules with email best practices already in place
  • See exactly where rules were broken in email creative for easy remediation
  • Receive a SendabilityTM Score for each email to prove it’s ready for deployment
Choose from 80+ rules in our catalog for automated email best practices.

Welcome to the Future of Email QA

If there’s one thing we’ve learned after working with email marketers, it’s that your brand isn’t standard. And your email QA shouldn’t be either. We want you to QA your way so you can send epic emails and get on with your day.

We believe the future of email QA is custom. Come join us.

Custom QA is now available with an Enterprise plan of the Inbox Monster Creative Suite. For more information on Inbox Monster’s testing and rendering solutions, visit inboxmonster.com/rendering.

Want to take Custom QA for a test drive? Reach out to our team and schedule a demo.

FAQs About Custom QA

What is Custom QA?

Included in Inbox Monster’s Creative Suite, Custom QA uses customizable rules and a built-in SendabilityTM Score to tailor email testing workflows for each brand’s unique needs.

How much does Custom QA cost?

Custom QA is available only with an Enterprise plan of Inbox Monster’s Creative Suite, which starts at $10,000 annually. Exact pricing is based on the number of rules included in a ruleset, so contact our Sales team for a custom quote.

What kind of rules are included in Custom QA?

Custom QA allows teams to build specialized rule catalogs based on the standards that matter most to their organization. Rulesets can cover everything from brand consistency and design requirements to legal disclaimers, accessibility guidelines and more. Teams can tailor these rulesets to match internal workflows and approval processes, ensuring every email is tested against their exact requirements before send.

What is the Sendability Score?

The Inbox Monster SendabilityTM Score is a proprietary score within Custom QA that helps teams quickly understand whether an email is ready for deployment. After an email is analyzed against an organization’s custom ruleset, Inbox Monster generates the Sendability Score based on how well that message meets those standards. Failed rules are clearly identified for remediation, so teams can quickly fix issues, improve overall accuracy and send with confidence.

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