About
Email on Acid, now powering the next-generation email QA suite Mailgun Inspect, is built for marketing and email teams that need to deliver flawless campaigns at scale. The platform provides instant email previews across 100+ of the latest email clients and devices in under 10 seconds, eliminating the guesswork from pre-send QA. Beyond visual rendering, Email on Acid goes end-to-end: it checks accessibility compliance against WCAG 2.2 standards (helping teams prepare for regulations like the European Accessibility Act), validates all links and images, and tests inbox provider compatibility across major ISPs. A dedicated content spam analysis engine—covering both B2B and B2C environments—identifies red flags that could land emails in the spam folder, independent of sender reputation. Built on the Mailgun platform, the suite integrates pre-send checks, high-volume delivery, and post-send analysis into one unified workflow. With 99.9% uptime, SOC 2 Type 1 compliance, ISO 27001/27701 certification, and GDPR adherence, it meets enterprise-grade security requirements. It is trusted by major brands and agencies looking to minimize human error, reduce QA cycles, and maximize email ROI. Ideal for email marketers, campaign managers, digital agencies, and enterprise teams.
Key Features
- Email Previews on 100+ Clients & Devices: Render and visually inspect emails across more than 100 email clients and devices in under 10 seconds to ensure consistent display everywhere.
- Accessibility & Compliance Testing: Validate emails against WCAG 2.2 guidelines to stay ahead of accessibility mandates like the European Accessibility Act (EAA).
- Content Spam Analysis: Analyze email content against all major ISPs with separate B2B and B2C delineation to catch spam triggers before they block delivery.
- Link & Image Validation: Automatically check all links and images in an email to ensure every customer touchpoint is functional and optimized.
- End-to-End Email Lifecycle Management: Built on the Mailgun platform, manage pre-send QA, high-volume delivery, and post-send analytics all from one integrated suite.
Use Cases
- Email marketing teams previewing campaign designs across Gmail, Outlook, Apple Mail, and 100+ other clients before deployment
- Agencies running QA checks on client email templates to ensure pixel-perfect rendering on all devices
- Compliance-focused organizations testing email accessibility against WCAG 2.2 to meet legal requirements like the EAA
- E-commerce brands analyzing email content for spam triggers to maximize inbox delivery rates before a product launch
- Enterprise marketing operations teams integrating pre-send QA into automated email production workflows via API
Pros
- Comprehensive Pre-Send QA: Covers rendering, accessibility, spam scoring, and link/image checks in one platform, reducing reliance on multiple tools.
- Fast Results with High Uptime: Preview results are delivered in under 10 seconds with a 99.9% platform uptime SLA, keeping production workflows uninterrupted.
- Enterprise-Grade Security & Compliance: SOC 2 Type 1, ISO 27001/27701, and GDPR certifications make it suitable for organizations with strict data security requirements.
- Broad Inbox Provider Coverage: Tests against all major inbox providers and applications, ensuring compatibility across the full email ecosystem.
Cons
- Transitioning to a New Platform: Email on Acid is being folded into Mailgun Inspect, which may cause disruption or confusion for existing standalone users during migration.
- Primarily Focused on Email QA: The platform is specialized for pre-send testing and does not cover email design creation or broader marketing automation.
- Paid Plans Required for Full Access: Advanced features and higher test volumes typically require a paid subscription; the free trial has limitations.
Frequently Asked Questions
What is Email on Acid?
Email on Acid is an email pre-deployment quality assurance platform that allows teams to preview emails across 100+ clients and devices, check accessibility, validate links and images, and analyze spam scores before sending campaigns.
What is Mailgun Inspect and how does it relate to Email on Acid?
Mailgun Inspect is the next-generation evolution of Email on Acid, built on the Mailgun platform. It combines all of Email on Acid's QA tools with high-volume sending and post-send analytics into a single unified suite.
How quickly does Email on Acid generate email previews?
Email previews across 100+ clients and devices are typically generated in under 10 seconds, enabling fast iteration during email production.
Does Email on Acid support accessibility testing?
Yes. The platform tests emails against WCAG 2.2 accessibility guidelines, helping teams comply with regulations such as the European Accessibility Act (EAA).
Is Email on Acid secure and compliant for enterprise use?
Yes. Email on Acid holds SOC 2 Type 1 compliance, ISO 27001 and 27701 certifications, and is fully GDPR compliant, making it suitable for enterprise and regulated-industry use cases.
