Email on Acid Review: Seeing How a Message Actually Renders
Email on Acid suits pre-send rendering checks across many email clientsIn this Email on Acid review, value for money scores 7.0, and 2 of the 6 tagged reviews that discuss it read as favourable.
Every score on this page validated by the site owner · latest validation Oct 16, 2026 · How we score
Email on Acid in three sentences
Email on Acid previews emails across 100+ clients and devices, including dark mode, per its inbox display page read on Sep 26, 2026. The vendor's site says Mailgun Inspect succeeds Email on Acid, read on Oct 4, 2026. Scores rest on 8 tagged reviews, and value for money scores 7.0 on 6 tagged reviews.
See it before you read on
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What it costs
Three plans. Every figure read on the vendor's pricing page between Sep 26 and Oct 3, 2026.
Spotted a change? Tell us
Prices read on the vendor's page: Basic $99 a month.
Prices read on the vendor's page: Premium $199 a month, billed monthly.
Scores calculated on 8 tagged reviews; global score 7.9.
What you get, what you don't
Six things Email on Acid does. None of the six is missing on the vendor's pages; the weak spots are in what reviewers say, below.
- Salesforce Agentforce MarketingNative
- Data hostedUS or Europe
- GDPR data processing agreementAvailable
- Single sign-onAvailable
- ChannelsTicket, phone, chat
- HoursNot published
- PhoneNot published
- Read as negative0 of 1 tagged reviews
The data behind the score
Our five scores against the average of the tools we score.
Should you buy it?
Name your dealbreaker. No profile is scored on its own yet: too few tagged reviews per profile, so the page shows the overall score.
Buy it if You want to preview emails across 100+ clients and devices before sending. Skip it if You need more than 2,000 previews a month without overage fees.
Price level draws 2 negative mentions Price level draws 2 negative mentions and no favourable mention; Basic is $99 a month for 1,000 previews, read on Sep 26, 2026. We hold no published fact that shows another tool here does better.
Plans include 1,000 or 2,000 previews a month Basic includes 1,000 previews a month and Premium 2,000; previews beyond that are billed as overages at $0.15 per preview, read on Sep 26, 2026. We hold no published fact that shows another tool here does better.
Monthly plans carry no refund No refund is given on monthly plans; annual plans canceled within 30 days get a pro-rated refund, read on Sep 26, 2026. We hold no published fact that shows another tool here does better.
Questions to ask the vendor
- Which plan covers the previews I run each month?Basic allows 1,000 previews a month; overages are $0.15 per preview.
- Are annual plans available, and when is a refund possible?Monthly plans carry no refund; annual plans canceled within 30 days are refunded pro rata.
- What changes now that Mailgun Inspect succeeds Email on Acid?The vendor's site says Mailgun Inspect succeeds Email on Acid, read on Oct 4, 2026.
If Email on Acid isn't it
Three tools we score in this category. Each card names where the tool is weaker. Price level, Preview allowance and Refunds have no card: we hold no published fact that shows another tool here does better. Click a card, or a name below, to put it next to Email on Acid.
- Lists spam testing on 5 major filters, including SpamAssassin and Barracuda
- Billing and renewals draw 2 negative mentions
- Lists a RESTful email API and an SMTP relay for sending
- Price level draws 23 negative mentions
- Lists 24/7 email monitoring and spam testing across 25+ spam filters
- Price level draws 7 negative mentions
Email on Acid vs GlockAppsthe three alternatives
 Email on Acid |
GlockApps |
Mailgun |
Litmus |
|
|---|---|---|---|---|
| Our score | 7.9* | 8.7 | 7.6 | 7.3 |
| Price and plan | ||||
| Entry price | $99 /mo | $85 /mo | From $15 /mo | Not published |
| Free plan | No free plan stated | Free plan | Free plan | No free plan stated |
| Free trial | 30-day free trial | No free trial stated | 30-day free trial | No free trial stated |
| Four dimensions, same grid | ||||
| Ease of setup | 9.0* | 8.1 | 7.0 | 8.3 |
| Feature depth | 7.3* | 8.7 | 8.3 | 7.8 |
| Value for money | 7.0* | 9.2 | 6.5 | 5.7 |
| Support quality | 7.6* | 7.1 | 7.5 | 6.6 |
| Fit | ||||
| Commitment | 1-month term, auto-renews | Auto-renews if enabled | Monthly term, auto-renews | Auto-renews unless cancelled |
| Support channels | Ticket, phone, chat | Chat, email, phone | Ticket, chat, phone | Chat |
| Main strength | Pre-send email preview testing | Spam placement testing across providers | Email API and SMTP relay | Email client preview and testing |
GlockApps scores 8.7 on 22 tagged reviews. Its Essential plan lists 30 spam test credits, read on Oct 4, 2026.
Mailgun scores 7.6 on 62 tagged reviews. Its Foundation plan lists 50,000 emails a month, read on Sep 26, 2026.
Litmus scores 7.3 on 23 tagged reviews. It lists a proof review and approval workflow, read on Oct 4, 2026.
Read on Sep 26, 2026: Email on Acid previews across 100+ clients and devices, Litmus across 100+ email clients; GlockApps tests 5 major spam filters; Mailgun Free sends 100 emails a day.
Same five-dimension grid for every tool; the fifth dimension changes with the category and stays out of this table. Prices and integrations read on each vendor's public pages between Sep 26 and Oct 4, 2026. * Under 10 tagged reviews: the score is weighted toward the site average; with none, it comes from the averages of the tools we score. Some of these prices have not been read again for 6 months. Check the vendors' pages before you buy.
What the reviews say, in depth
Previews cover 100+ clients and devices, dark mode included
The vendor lists email preview testing across 100+ clients and devices, including dark mode, read on Sep 26, 2026. It also lists inbox-view testing of the sender name, subject line and preheader text, read on Sep 26, 2026.
Feature range has 4 mentions, 2 favourable and none negative, and feature depth scores 7.3 on 5 tagged reviews.
Premium lists accessibility, HTML, link and spam checks
Premium lists accessibility tests, HTML code analysis, link and image validation and spam content checks, read on Sep 26, 2026. The vendor's home page lists automated accessibility checks against WCAG 2.2, read on Oct 3, 2026.
Results and time saved has 3 mentions, 2 favourable and 1 negative.
Basic is $99 a month and Premium $199, billed monthly
Basic is $99 a month for 1,000 previews and Premium is $199 a month for 2,000 previews, billed monthly, read between Sep 26, 2026 and Oct 3, 2026. Contract is priced by quote. Overages are $0.15 per preview on Basic and Premium, read on Sep 26, 2026.
Price level draws 2 negative mentions, all of the theme's mentions, and value for money scores 7.0 on 6 tagged reviews.
Support lists ticket, phone and chat channels
The pricing page lists ticket support plus phone and chat support, read on Oct 3, 2026. Customer support has 1 favourable mention.
Support quality scores 7.6, but on only 1 tagged review, so this score rests on a small count.
Plans start with a one-month term and renew automatically
Self-service plans have an initial 1-month term and renew automatically, read on Oct 3, 2026. No refund is given on monthly plans, and annual plans canceled within 30 days get a pro-rated refund, read on Sep 26, 2026.
Email on Acid lists a 30-day free trial, with a credit card required to start, read on Oct 3, 2026.
Before you commit
Email on Acid lists previews across 100+ clients and devices, and Litmus across 100+ email clients, both read on Sep 26, 2026. Email on Acid's Basic is $99 a month, read on Sep 26, 2026; Litmus's price is not published, so no price comparison is made.
The vendor lists email preview testing across 100+ clients and devices, including dark mode, read on Sep 26, 2026. It also lists inbox-view testing of the sender name, subject line and preheader text, read on Sep 26, 2026.
The site holds no published fact on false rendering alerts, so it does not judge that. It shows that Premium lists HTML code analysis and link and image validation, read on Sep 26, 2026, and that results and time saved has 3 mentions, 1 of them negative.
Basic is $99 a month for 1,000 previews and Premium $199 a month for 2,000, billed monthly, read between Sep 26, 2026 and Oct 3, 2026; Contract is priced by quote. Premium and Contract also list accessibility tests, HTML code analysis, link and image validation and spam content checks, read on Sep 26, 2026.
The site holds no published fact on choosing which clients a test runs on, so it does not judge that. The vendor lists previews across 100+ clients and devices, including dark mode, read on Sep 26, 2026.
The site holds no published fact on a feature named Campaign Precheck, so it does not describe it. The vendor lists inbox-view testing of the sender name, subject line and preheader text, and content spam analysis across major ISPs, read on Sep 26, 2026.
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