Why we built an Email on Acid alternative (and who it's for)

What Email on Acid actually does well

Email on Acid (sometimes written "emailonacid" or "EoA", now owned by Sinch) is a pre-deployment email testing platform. It renders your email across 70+ clients — including the legacy ones most modern teams have forgotten about, like Lotus Notes, AOL Mail, and Outlook 2007 — and runs automated checks: WCAG accessibility scanning, spam filter scoring, link validation, image checks, and a campaign precheck checklist.

For an enterprise email team with strict deliverability and compliance requirements, that bundle makes sense. If you're sending to 5 million subscribers across diverse clients and your legal team requires WCAG sign-off on every campaign, Email on Acid is doing real work for you. We're not here to argue with that use case.

The use case Email on Acid isn't built for

The problem is that Email on Acid (and its main competitor, Litmus) gets recommended to everyone doing email — including teams whose actual problem isn't QA. It's collaboration.

Talk to an agency running 30 client emails a month. Talk to a freelance email developer. Talk to a 6-person ecommerce marketing team. Their bottleneck isn't "does this render in Outlook 2010" — it's:

• How do I get my client to leave specific feedback without a 14-email reply chain?
• How do I show stakeholders the email without them needing to create yet another account?
• How do I track who approved what, and when, before send?
• How do I compare v1 vs v3 of the email so I can see what changed?

Email on Acid doesn't solve any of those. Their collaboration features are basic — comments are flat, guest reviewers typically need a paid seat, there's no pin-based feedback on the rendered email itself, and the approval workflow is bolted on rather than built in. The tool was designed for QA engineers signing off on technical correctness, not for a client telling you the headline copy needs to change.

And then there's the price

Email on Acid pricing starts at $73/month on the Basic plan, but most teams quickly hit its limits (1 user, restricted projects, no integrations) and end up on Premium at $134+/month. There is no free plan — only a 7-day trial. For an enterprise team, $1,608/year is a rounding error. For a freelancer or a 4-person agency reviewing 10 emails a month, it's the difference between using the tool and not.

The math gets worse when you realize many teams pay Email on Acid and something else for the collaboration layer — a Frame.io seat, a Filestage subscription, or a free-but-painful workflow of shared Google Docs and screenshots. That's $100-$200/month for a problem one tool should solve.

What we built instead

EmailQA started from a different question: what would an email review tool look like if you built collaboration first and added rendering second?

The rendering layer is real device rendering — actual Macs running Outlook, actual iPhones running Apple Mail, actual Android phones running Gmail — across the email clients that cover 95%+ of real subscriber inboxes: Gmail, Outlook, and Apple Mail in both Light Mode and Dark Mode. Email on Acid covers more niche clients (Lotus Notes, Outlook 2013, AOL). We chose not to chase that long tail because most teams don't need it — and the ones that do are exactly the enterprise teams Email on Acid is the right tool for.

The collaboration layer is what Email on Acid doesn't have:

• Pin-based visual comments — click anywhere on the rendered email to leave a comment tied to coordinates
• No-account guest reviewers — share a link, anyone can comment, no signup wall
• Version comparison with a visual slider — see exactly what changed between v1 and v3
• Approval workflows with sign-off tracking — know who's blocking send
• Direct ESP imports from Mailchimp, Klaviyo, HubSpot, and 6 others
• Slack notifications when reviewers comment or approve

Pricing is $20/month flat, with a 14-day Pro trial (no credit card) and a permanently free plan with 3 projects/month. A team switching from Email on Acid Basic saves $636/year; from Premium, $1,368+/year.

When you should still pick Email on Acid

We'd rather you pick the right tool than the cheap one. Stay with Email on Acid if:

• WCAG accessibility compliance is a hard requirement (regulated industries, government, healthcare)
• You need spam scoring and deliverability testing as a built-in step before every send
• Your audience meaningfully includes Lotus Notes, AOL, or other legacy clients
• Your QA process is automated checklists, not human review

For everyone else — agencies, freelancers, in-house marketing teams, ecommerce — EmailQA is what we wish had existed when we were paying $134/month for a tool that solved 30% of our actual problem.

How EmailQA compares head-to-head

We wrote a longer side-by-side that covers pricing, client coverage, accessibility, and collaboration feature-by-feature: Litmus vs Email on Acid (and the cheaper alternative). If you're trying to decide between the three, that's the page to read next.

Or skip ahead: see the full EmailQA vs Email on Acid breakdown, or start a free 14-day Pro trial — no credit card.