Email Accessibility vs MailTester

Email Accessibility checks email content against WCAG 2.2. Users send an email to a unique address and receive a report identifying accessibility issues. The service says its AI scanner checks more than 80 WCAG 2.2 criteria with 95%+ accuracy. Reports map findings to WCAG guidance and include severity levels, code examples, and suggested fixes. AI also extracts text from images and suggests alt text. Compatibility checks cover Gmail, Outlook, Apple Mail, and other major email clients.

The service accepts HTML from tools including Klaviyo, Mailchimp, Salesforce, Braze, Campaign Monitor, and Constant Contact. Supported inputs include HTML email files, builder exports, inline CSS, embedded stylesheets, images, attachments, and multipart MIME emails. It runs on the web. Free provides one monthly audit; Pro costs $10 a month, billed monthly, and includes ten monthly emails, with extra emails at $0.70 each. Enterprise pricing is available by contacting the maker. Content is retained for 60 days by default, with account settings configurable from 1 to 365 days. API access is listed as coming soon for Pro, and API endpoints are in development.

MailTester checks why email may reach spam and returns a deliverability score out of 10. To run a test, generate a disposable address, send the message there and receive a report in seconds. Scoring starts at 10, subtracts points for detected issues, and explains penalties with suggested fixes. Authentication checks include SPF, DKIM, DMARC, domain alignment, reverse DNS and forward-confirmed reverse DNS. Sending IPs are checked against Spamhaus, SpamCop, Barracuda and other DNS blocklists. Content analysis covers HTML, text-to-image ratio, links, subject, List-Unsubscribe and Message-ID. Rspamd supplies a spam score and triggered rules. Newsletter checks include one-click List-Unsubscribe under RFC 8058, message size and text-image ratio. MailTester offers web, API and self-hosted platforms. Its API creates test addresses and reads report status and scores as JSON. The free plan costs nothing, needs no account and provides 25+ checks per test.