Inbox Booster
Cold email deliverability monitoring, spam trap detection, and inbox placement audits
pricingfree tierapichecked 25 Aug 2026
What Inbox Booster is
Inbox Booster is an email deliverability diagnostic platform designed for cold email senders, outbound sales development reps, and digital marketing agencies. It monitors inbox placement across Google Workspace, Outlook 365, and Yahoo, identifies blacklists and spam traps, and gives email administrators clear technical remediation steps to recover damaged sender reputations.
Pricing
| Plan | Price | Annual | What you get |
|---|---|---|---|
| Starter | $39/mo | $29/mo | Monitor up to 5 sender domains, automated seed list inbox testing, blacklist monitoring |
| Pro | $89/mo | $69/mo | Monitor up to 20 domains, real-time spam trap alerts, DNS authentication audits, priority support |
| Agency | $199/mo | $159/mo | Monitor up to 50 domains, multi-client portals, automated email audit reports, API access |
Annual plans offer over 25% discount across all tiers.
Free access: Free initial deliverability audit test upon signup
read from the vendor pricing page · 25 Aug 2026 · how we verify
Best for
- Outbound sales teams auditing secondary cold outreach domain deliverability
- Email marketing agencies troubleshooting sudden drops in client open rates
Not for
- 3D CAD engineers modeling mechanical robotics gears
Integrations
Inbox Booster alternatives
All 3 alternatives to Inbox Booster, compared Get the Toolvern badge for Inbox Booster
Mail-Tester Spam score tester and email deliverability checker with raw header analysis 
GlockApps Deliverability testing and blacklist monitoring 
Kickbox Enterprise email verification, list cleaning, and comprehensive deliverability suite Head to head: Inbox Booster vs Mail-Tester Inbox Booster vs GlockApps Inbox Booster vs Kickbox
Compiled by Stepan Noianov from the vendor's own site and pricing page. Something wrong? Report an inaccuracy.