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Inbox Monster Is Now Available in Salesforce Marketing Cloud Next

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Inbox Monster

11 Dec 2025

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In June, Salesforce declared the end of the 'do-not-reply' era of marketing with the launch of Marketing Cloud Next. According to the company, this evolution of its leading marketing solution is the first that’s truly agentic, “powered by autonomous AI agents that act as always-on collaborators.”

And today, we’re excited to announce that Inbox Monster is the first to bring enterprise-grade creative rendering to Marketing Cloud Next.

Easy Email Testing—Native Within Marketing Cloud Next

For the first time ever, Inbox Monster enables you to preview your emails across 110+ devices and clients—desktop, mobile, tablet and AI—without ever leaving Salesforce.

Inbox Monster seamlessly fits into your existing workflow so you can QA emails as you build them. If you’re tired of switching tabs or logging into different tools, the struggle is now over.

Available in Salesforce’s AppExchange, Inbox Monster enables you to render emails directly in your Salesforce Marketing Cloud Growth and Advanced environment. With configurable device settings, Salesforce users unlock first-of-its-kind features.

“With email testing now native to one of the most established marketing platforms in the industry, Salesforce customers gain immediate access to a total game-changer. Inbox Monster is proud to serve marketers with the only creative rendering solution that’s directly integrated with Marketing Cloud Next.” ~ Evan Frey, Head of Global Partnerships at Inbox Monster

AI Summary Previews, Designed for Agentic Marketing

Salesforce has touted Marketing Cloud Next as a platform that “brings agentic marketing to life,” with actionable insights and cross-departmental workflows.

We are dedicated to supporting this mission. In addition to being the fastest way to achieve flawless email rendering, Inbox Monster provides AI summary previews for popular AI tools, such as Gemini and Apple Intelligence.

Now you can see how AI will interpret your emails—before they land in the inbox.

We pride ourselves on staying first-to-market with new previews, so you can always test against the latest devices and most current email clients. Now, Salesforce users have over 110 previews at their fingertips, without logging out of their ESP.

What Inbox Monster Brings to Marketing Cloud Next

Device previews and AI summaries aren’t all that Inbox Monster has in store for Salesforce customers. Marketing Cloud Next users gain the full benefits of our Creative Suite:

  • Configurable device settings that allow you to select which previews to include in each test
  • HTML and dark mode checks to catch usability and visual errors before deployment
  • Thumbnail and full-width device previews in the Preview and Test module within Marketing Cloud Next to quickly scan results or view detailed rendering up close
  • Access to core Inbox Monster features at no additional charge, including proofing, accessibility, visual diagnostics, link validation and more

Powerful Innovation in One Place

Marketing Cloud Next was introduced as a way to “help teams move faster, engage at scale and drive better results across the entire customer funnel—all from a single platform.” Needless to say, we’re completely on board.

Email marketers should be able to test faster, streamline their entire QA process and send with confidence. And thanks to our partnership with Salesforce, that’s now a reality.

To integrate Inbox Monster with Marketing Cloud Next, visit the Salesforce AppExchange today.

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