Inbox Booster vs Mail-Tester: 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 | Inbox Booster | Mail-Tester |
|---|---|---|
| tier 1 | $39/mo — Monitor up to 5 sender domains, automated seed list inbox testing, blacklist monitoring | On request — 20 email spam test credits, full SpamAssassin breakdown, SPF/DKIM verification |
| tier 2 | $89/mo — Monitor up to 20 domains, real-time spam trap alerts, DNS authentication audits, priority support | On request — 200 email spam test credits, full API access, JSON report export |
| tier 3 | $199/mo — Monitor up to 50 domains, multi-client portals, automated email audit reports, API access | On request — 2,500 test credits, high-volume automated testing API, priority queue |
read from both vendors' pricing pages · 25 Aug 2026 · how we verify
Choose Inbox Booster if
- Outbound sales teams auditing secondary cold outreach domain deliverability
- Email marketing agencies troubleshooting sudden drops in client open rates
Choose Mail-Tester if
- Email marketers and newsletter publishers auditing newsletter templates for spam triggers
- Developers testing transactional email deliverability and authentication headers
Where each one disappoints
Inbox Booster
- 3D CAD engineers modeling mechanical robotics gears
Mail-Tester
- Graphic designers editing print layout raster dimensions
Compiled by Stepan Noianov from both vendors' own sites. Something wrong? Report an inaccuracy.