Bulk verification
Import from CSV, Excel, or paste—and verify at scale.
Verify smarter. Spend less on API credits.
Bulk email verification with smart pre-filtering—up to 60% less API usage before you send a single request.
What FirstPass does
FirstPass is a browser extension (Chrome, Edge, and Firefox) that helps you verify email lists in bulk before you spend money on third-party verification APIs.
Upload or paste thousands of emails, run smart local checks (syntax, MX records, disposable domains, and catch-all detection), then send only the remaining addresses to your chosen verification provider—such as MillionVerifier, ZeroBounce, NeverBounce, and 12+ others.
Core capabilities
Smart pre-filtering
Catch bad addresses locally before paid API calls.
Multi-provider
Priority routing, round-robin, and fallback.
Results & workflow
Export, schedule jobs, and sync to Google Sheets.
Free
Perfect for trying bulk verification with your own API keys.
Free
- Unlimited local pre-filtering
- 1 verification provider
- CSV & paste import
- Export results
- Email support
Pro
For marketers and sales teams verifying lists every week.
$19/mo
- Everything in Free
- Unlimited API providers
- Smart provider routing
- Scheduler & history
- Google Sheets sync
- Priority email support
Team
For agencies and teams with shared workflows and volume.
$49/mo
- Everything in Pro
- Team workspace (coming soon)
- Shared API key vault
- Bulk jobs queue
- Dedicated onboarding
- Priority support + SLA
Compare plans
| Feature | Free | Pro | Team |
|---|---|---|---|
| Syntax & MX pre-filter | |||
| Disposable domain check | |||
| API providers | 1 | Unlimited | Unlimited |
| Scheduler | — | ||
| Google Sheets | — | ||
| History & export | Basic | Full | Full |
| Support | Priority | Priority + SLA |
Frequently asked questions
Yes. FirstPass connects to providers you already use (MillionVerifier, ZeroBounce, NeverBounce, and more). You pay those providers directly for verification credits.
Pro and Team unlock advanced features inside the extension—multi-provider routing, scheduling, Sheets integration, and priority support—not bundled verification credits.
Yes. Yearly plans are billed once per year and include the discounted per-month rate shown on this page.
Pro includes a 14-day trial. Cancel anytime before it ends and you will not be charged.
Contact us
Questions about billing, your subscription, or the extension? Reach us by email or use the form below (opens your email client).
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