Email on Acid review (2026): is it worth $99 a month?
Email previews and pre-send QA, now moving to Mailgun Inspect
Black Friday: is there a Email on Acid sale?
Email on Acid report card
Weak · out of 4.0 · graded Nov 13, 2026
Best for previewing an email in many clients before a send
Email on Acid shows your email across 100+ clients and devices, with unlimited users and an API. Accessibility, spam and link checks only start at Premium, and its pricing page says customers are moving to Mailgun Inspect from June 2026, with old previews not carried over.
Who Email on Acid is for
- Fits if you check each campaign across many email clients
- Works for agencies that need unlimited users on one account
Who Email on Acid is not for
- Pricey if you add it up, at $99 a month for 1,000 previews
- Skip it if you want accessibility or spam checks on the cheap plan, as they start at Premium, $199
- Watch out: the pricing page says customers move to Mailgun Inspect from June 2026 and old tests are not carried over
- Watch out: it does not send email, so you need a separate sending service
- Watch out: the trial length is not stated
Why Email on Acid gets a 1.8
Five grades, each with its reason. The GPA is their average: an A is 4 points, an F is none.
- DValue for moneyBasic is $99 a month for 1,000 previews, above the category's dearer quarter ($49). The checks most people want sit on Premium at $199.
- DFree plan and trialA free trial is offered, but the page states no length.
- CFeaturesPreviews, accessibility, link and image checks and spam analysis. It does not send email.
- CEase of useNo rating on record. Paste or send the email and read the results, with a migration to Mailgun Inspect under way.
- BPlatforms and integrationsWeb, with an API and unlimited users on every plan and one listed integration.
What these grades rest on. Graded from this listing, whose facts were read from Email on Acid's own pages on 13 November 2026. Not based on using the product, and shorter than our full reviews. How we review and grade.
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Paste this where you want the badge. It links here and follows the grade if it changes. About badges
<a href="https://toolgpa.com/tools/email-on-acid#review"><img src="https://toolgpa.com/badge/email-on-acid.svg" alt="Email on Acid: 1.8 GPA on ToolGPA" width="196" height="56"></a>Where Email on Acid stands among email verification and deliverability tools
Email on Acid's GPA of 1.8 is higher than 4 of the 61 other email verification and deliverability tools we grade, and level with 3.
It stands best on platforms and integrations (B, above 28 of 61) and worst on value for money (D, above 0).
Its paid plans start at $99 a month, against a middle price of $21.50 for the category: 38 of the 43 others that charge start lower.
On features, ease of use and platforms it scores 2.3 out of 4. 8 tools score higher and cost less.
Each grade against the category
Every bar is all 62 email verification and deliverability tools we grade, cut by the letter each got. Email on Acid’s own letter is outlined.
- DValue for moneyAbove 0 of 61, level with 8
- DFree plan and trialAbove 6 of 61, level with 2
- CFeaturesAbove 0 of 61, level with 45
- CEase of useAbove 2 of 61, level with 50
- BPlatforms and integrationsAbove 28 of 61, level with 33
Price against what you get
Each dot is one of 45 email verification and deliverability tools. Further left costs less, and higher up scores better on features, ease of use and platforms. Point at a dot to see which tool it is.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Keep Email on Acid, or make your own?
Keep it
To replace Email on Acid you would be making newsletters sent to thousands of people that still reach the inbox. That is not a weekend's work, with an AI app builder or without one.
That makes this kind of software worth paying for, not this one in particular: 54 of the 61 other email verification and deliverability tools grade higher. It costs $1,188 a year.
What you could make
- Reports: an app builder makes this well.
What you could not
- Newsletters sent to thousands of people that still reach the inbox.
- It plugs into other products, Mailgun among them, and has an API.
What this rests on. Email on Acid’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
What is Email on Acid?
Email on Acid previews an email's HTML across 100+ clients and devices before it is sent. Higher plans add accessibility, link, image, code and spam-content checks. The vendor says current customers are moving to Mailgun Inspect, the next-generation product from Mailgun, and that the two are the same line of tools.
Worth knowing
- The pricing page says current customers will move to Mailgun Inspect from June 2026, and that old previews and tests are not carried over.
- Annual-plan customers migrate at the end of their current term.
- Basic has no accessibility, spam or link checks; those start at Premium.
- It does not send email; the FAQ says you need a separate sending service.
Key features
- Client and device previews
- Each screenshot of a client or device counts as one preview, so a test across 50 clients uses 50 previews.
- Accessibility checks
- Premium tests are based on the W3C Web Content Accessibility Guidelines, which the vendor ties to the European Accessibility Act.
- Link and image validation
- Premium checks links and images in a message. The FAQ says these checks, unlike previews, are unlimited.
- Spam content analysis
- Premium includes content spam checks and HTML code analysis, judged on the message itself and not on your sending reputation.
- API access and unlimited users
- Every plan includes API access, and none of the plans limit how many people on a team can use the account.
Email on Acid pricing
As of Nov 13, 2026, Email on Acid is a paid product with a free trial, starting at $99 per month.
- Starts at
- $99 per month
- Free plan
- None
- Free trial
- Free trial offered; its length is not stated on the page
| Plan | Price | What you get |
|---|---|---|
| Basic | $99per month for 1,000 previews | Unlimited users, 100+ preview clients and devices, API access; extra previews cost $0.15 each. |
| Premium | $199per month for 2,000 previews | Adds accessibility tests, HTML code analysis, link and image validation and spam content checks. |
| Contract | Custom | Custom preview allotment with the Premium feature set and phone and chat support; sold through sales. |
Read from emailonacid.com on Nov 13, 2026. Prices change, so confirm with Email on Acid before you buy.
Works with
Email on Acid alternatives
- Email on Acid vs Inbox Monster
From $3,750/yr
- Email on Acid vs GlockApps
Free plan · from $59/mo
- Email on Acid vs MailGenius
Free plan · from $23/mo
- Email on Acid vs Mail-Tester
Free plan · from $10/mo
Common questions
Does Email on Acid have an Android app?
No Android app was listed when its pages were read on Nov 13, 2026. Email on Acid is listed for Web.
Does Email on Acid have an iPhone app?
No iPhone app was listed when its pages were read on Nov 13, 2026. Email on Acid is listed for Web.
Is Email on Acid open source?
Email on Acid is not described as open source on its own site, as read on Nov 13, 2026.
Does Email on Acid have an API?
Yes. Email on Acid offers a public API, according to its own site.
Sources for this page
The prices, plans, platforms and features above were read from these pages on Nov 13, 2026.