Email on Acid by Sinch vs Unspam: Which Should You Choose in 2026?
Both prices below were read from each vendor's own pricing page on the date shown.
Pricing side by side
| Plan | Email on Acid by Sinch | Unspam |
|---|---|---|
| tier 1 | $99/mo — 1 user, unlimited email previews across 100+ clients, basic spam testing | Free — 10 test credits/month, full SPF/DKIM/DMARC check, spam trigger word analysis |
| tier 2 | $179/mo — 3 users, advanced deliverability tools, URL validation, team collaboration | $9/mo — 100 test credits/month, visual device rendering preview, blocklist monitoring |
| tier 3 | $599/mo — 10 users, custom role permissions, SSO, dedicated account manager | $29/mo — 500 test credits/month, email client screenshot suite, API access, team access |
read from both vendors' pricing pages · 22 Aug 2026 · how we verify
Choose Email on Acid by Sinch if
- Enterprise email marketing teams needing pixel-perfect client rendering
- Deliverability engineers testing spam filter triggers prior to broadcast
Choose Unspam if
- Email marketers ensuring newsletter templates pass spam filters before mass broadcasts
- SDRs testing cold outreach templates for spam trigger words and broken HTML tags
Where each one disappoints
Email on Acid by Sinch
- Cold outbound lead scraping and automated warmups
Unspam
- Live customer support chat ticketing
Compiled by Stepan Noianov from both vendors' own sites. Something wrong? Report an inaccuracy.
Other options
All Email on Acid by Sinch alternatives All Unspam alternatives