- Free $0
5 spam tests, 3 inbox placements, 3 device previews, 5 screenshots, 5 heatmaps per month. AI assistant included.
- Custom $5/mo
Pay per test: spam tests $0.18, inbox placements $0.50, device previews $0.75, screenshots $0.20, heatmaps $0.30. Volume discounts to 30%, 15% off annual, $5 monthly minimum. API, MCP and three years of history included. DMARC monitoring is $6 per domain per month, first domain free.
Email on Acid pricing, plan by plan
What Email on Acid charges, taken from its own pricing page rather than from a review site, with the free tier and the first paid step called out.
Compared from public pricing and product pages, September 2026.
Free plan or trial
Free trial only, no free plan
First paid plan
$99/mo
Every Email on Acid plan
Email on Acid is owned by Sinch and its plans are now sold as Mailgun Inspect: Basic $99/mo and Premium $199/mo, both with unlimited users and a monthly preview cap (1,000 and 2,000) rather than unlimited previews, plus a custom Contract tier. Extra previews are $0.15 each, and one preview means one client or device screenshot. The vendor's pricing page offers a currency selector for USD, EUR and GBP and no annual discount. A free trial is available; there is no permanent free plan. Existing subscribers began transitioning to Mailgun Inspect starting June 2026.
Plan
Price
What it includes
Basic
$99/mo
unlimited users, 1,000 previews/mo across 100+ clients and devices, API access
Sold as Mailgun Inspect; $0.15 per extra preview.
Premium
$199/mo
unlimited users, 2,000 previews/mo across 100+ clients and devices, API access, accessibility tests, HTML code analysis, link and image validation, spam content checks
Sold as Mailgun Inspect; $0.15 per extra preview.
Contract
Custom pricing (contact us)
unlimited users, custom previews allotment across 100+ clients and devices, API access, accessibility tests, HTML code analysis, link and image validation, spam content checks, phone and chat support
What the same job costs at Unspam
Unspam charges for tests rather than for seats or mailboxes, so the comparison with Email on Acid depends on how much you send and how often you check.
Full Unspam vs Email on Acid comparison
Compared from public pricing and product pages, September 2026. Email on Acid is a trademark of its respective owner. Unspam is not affiliated with or endorsed by Email on Acid.