Mailgun (owned by Sinch/Pathwire) offers email validation as part of their email delivery platform. Verification runs through their API infrastructure.
BounceBuster takes a fundamentally different approach: your email lists never leave your computer. No uploads, no API calls, no per-email pricing. One-time $19, unlimited validation, forever.
When you use a cloud-based email validation service, your data leaves your control. Here's what that means with Mailgun:
Email addresses sent to Mailgun API for validation
Mailgun is an email sending platform - your validation data sits alongside sending infrastructure
Monthly subscription creates ongoing data dependency
Owned by Sinch (large messaging conglomerate) with complex data processing chain
Enterprise customers often have data residency requirements Mailgun may not meet
BounceBuster runs entirely on your machine. Your email lists are never uploaded, transmitted, or shared with anyone.
Zero data leaves your machine - no API calls for validation
$19 one-time vs $35-400/month recurring
No vendor dependency - works forever, even if the company disappears
No API integration required - just drag and drop files
Perfect for companies with strict data residency requirements
Cloud validation services charge per email or per month. BounceBuster is a one-time $19 payment for unlimited validation.
| Emails | Mailgun Cost | Per Email | BounceBuster | You Save |
|---|---|---|---|---|
| 10,000 | $35/month | $0.0035 | $19 once | $16 |
| 50,000 | $90/month | $0.0018 | $19 once | $71 |
| 100,000 | $160/month | $0.0016 | $19 once | $141 |
| 250,000 | $400/month | $0.0016 | $19 once | $381 |
Monthly subscription required. Validation is an add-on to their email sending platform.
BounceBuster: $19 one-time payment. No monthly fees. No per-email charges. No usage limits.
Mailgun offers SMTP verification, integration with their email sending platform, and API-based real-time validation. BounceBuster is a standalone desktop tool for batch validation only. If you use Mailgun for sending and want integrated validation, their offering may make sense. For standalone list cleaning with privacy, BounceBuster is the better choice.
Download BounceBuster and validate your email lists locally. No uploads, no accounts, no per-email fees. One-time $19 for unlimited use.
Free tier: 500 emails/month. Professional: $19 one-time for unlimited validation.