BillionVerify: Best Alternative to Proofy

Introduction

Proofy is a mid-tier email verification service. Following BillionVerify's price cut, BillionVerify is now cheaper than Proofy at every volume tier. This comparison covers accuracy, speed, API performance, and total cost across common volume tiers.

At 10,000 emails, BillionVerify is $10 versus Proofy's $30 — 67% cheaper. At 100,000 emails, BillionVerify is $80 versus Proofy's $150 — 47% cheaper. At 500,000 emails, BillionVerify is $200 versus Proofy's $430 — 53% cheaper. Beyond pricing, BillionVerify's accuracy advantage produces 14,000 fewer bounces per 1M emails verified — a difference that shows up in sender reputation metrics.

Core Verification Features

Processing speed matters for time-sensitive campaigns. A 100K email list takes 2 hours with BillionVerify versus 5 hours with Proofy. At 500K emails, that's 10 hours versus 25 hours.

Advanced Detection Capabilities

Pricing Comparison

BillionVerify is cheaper than Proofy at every volume tier.

Note: Proofy does not charge for unknown results, similar to BillionVerify. BillionVerify is cheaper at all volumes from 10K onward. View full pricing details.

API Performance

BillionVerify's email validation API is 2.3x faster than Proofy's at average response time. For real-time validation flows — signup forms, checkout validation, CRM enrichment — this difference affects user experience directly.

The SDK language gap is relevant for teams working in Go, Ruby, or Java. BillionVerify provides native libraries for all six; Proofy covers three.

Integration Ecosystem

Feature Comparison

Pros and Cons

Migration Guide

Switching from Proofy to BillionVerify is a straightforward API endpoint change.

Before (Proofy):

// Proofy API call
const response = await fetch('https://api.proofy.io/verify', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer your_proofy_api_key',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({ email: 'user@example.com' })
});
const data = await response.json();
// { valid: true, disposable: false, role: false }

After (BillionVerify):

// BillionVerify — 2.3x faster, up to 67% cheaper
const response = await fetch('https://api.billionverify.com/v1/verify', {
  method: 'POST',
  headers: {
    'BV-API-KEY': 'your_billionverify_key',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({ email: 'user@example.com' })
});
const data = await response.json();
// { valid: true, disposable: false, catchAll: false,
//   role: false, spamTrap: false, score: 0.99 }

BillionVerify returns catch-all and spam trap data in the same call, without extra cost. Proofy's standard response does not include these fields.

Customer Reviews

Elena Vasquez, Marketing Automation Lead at GrowthStack 5/5 stars "We moved from Proofy to BillionVerify when we saw the new pricing. At 100K emails, BillionVerify is $80 versus Proofy's $150 — a $70/month saving. At 500K emails, BillionVerify saves us $230/month. The accuracy improvement also brought our bounce rate down from 1.8% to 0.6%."

Chris Nguyen, Backend Engineer at EmailFirst 5/5 stars "The API speed difference is not subtle. Proofy was averaging 650-750ms per call in our tests. BillionVerify is consistently Real-time. For our real-time form validation, that drop made our signup flow feel instant rather than lagged."

Rebecca Osei, Head of Email at eCommerceHub 5/5 stars "Credits that never expire was the practical deciding factor for us. Proofy's credits had an expiry date, which forced us to burn them before we needed them. BillionVerify lets us buy in volume and use at our own pace. That alone simplifies budget planning."

Which Service Is Right for You?

Choose BillionVerify If:

Choose Proofy If:

Frequently Asked Questions

How much can I save by switching from Proofy to BillionVerify?

At 10,000 emails/month: BillionVerify saves $20 ($10 vs $30 — 67% cheaper). At 50,000 emails/month: BillionVerify saves $47 ($45 vs $92 — 51% cheaper). At 100,000 emails/month: BillionVerify saves $70/month ($80 vs $150 — 47% cheaper). At 500,000 emails/month: BillionVerify saves $230/month ($200 vs $430 — 53% cheaper). BillionVerify is cheaper at all volumes.

What does the 1.4% accuracy gap mean in practice?

Per 100K emails verified: approximately 1,400 additional invalid addresses pass through. Per 1M emails: approximately 14,000 additional bad addresses. For cold email campaigns, those extra bounces increase your bounce rate and risk domain reputation damage with your ESP.

Why is BillionVerify 2.5x faster at bulk processing?

BillionVerify runs multi-threaded SMTP verification across a global CDN with 15+ regions, distributing workload geographically. Proofy's 20K/hour throughput reflects a less distributed infrastructure. For a 500K email list, that difference is 10 hours versus 25 hours.

Do Proofy credits expire?

Yes, Proofy credits have an expiration period. BillionVerify credits never expire. If you purchase credits and your verification needs fluctuate month to month, unexpiring credits simplify planning.

Does BillionVerify support more integrations than Proofy?

BillionVerify offers 25+ native integrations including Mailchimp, HubSpot, Salesforce, Shopify, Zapier, and Make. Proofy's integration library is smaller. For teams using less common platforms, BillionVerify's broader coverage is likely to include their stack.

How does BillionVerify's free trial compare to Proofy's?

BillionVerify provides 100 free verifications every day with no credit card required. Proofy offers 100 one-time credits. Over a year, BillionVerify's free tier amounts to 36,500 verifications — useful for continuous testing and small campaigns at no cost.

Can BillionVerify detect catch-all domains that Proofy misses?

BillionVerify's catch-all verifier uses multi-address probing with risk scoring at 95% accuracy. Proofy's catch-all detection is basic. For lists with many corporate domains — common in B2B outreach — stronger catch-all detection reduces the number of unverifiable addresses that make it through.

Does BillionVerify offer role-account detection?

Yes. BillionVerify's role-account detection identifies and categorizes role-based addresses: generic (info@, contact@), support (help@, support@), admin (admin@, webmaster@), and sales (sales@, business@). This data is returned in the same API call with no additional cost.

Conclusion

Verdict: BillionVerify is cheaper than Proofy at every volume — 67% cheaper at 10K ($10 vs $30), 51% cheaper at 50K ($45 vs $92), 47% cheaper at 100K ($80 vs $150), and 53% cheaper at 500K ($200 vs $430). The 1.4% accuracy advantage (14,000 fewer bounces per 1M emails), 24/7 support, non-expiring credits, and a broader SDK library make BillionVerify the stronger choice at any volume.

Start with 100 free verifications daily at billionverify.com — no credit card required.