Proofy Review: Key Pain Points
Customers who move away from Proofy consistently cite the same frustrations:
- Higher cost at every tier. At $0.003/email, verifying 100K emails costs $300. BillionVerify charges $80 for the same volume — 47% cheaper. The gap widens at scale.
- Credits expire. Proofy credits have an expiration period. For teams with seasonal or unpredictable sending volume, unused credits become a hidden cost.
- No 24/7 support. Proofy offers email support only. If a verification pipeline breaks outside business hours, there is no live help available.
- One-time free trial. The 100 one-time free credits are not enough to properly evaluate accuracy across a representative list. BillionVerify gives 100 free verifications every day with no credit card required.
- Slower bulk processing. At 20K emails/hour, Proofy is 2.5x slower than BillionVerify's 50K/hour. A 500K email list takes 25 hours with Proofy versus 10 hours with BillionVerify.
Proofy: What It Does Well
Proofy is a mid-range email verification service with a clean interface and reasonable accuracy for most use cases.
Solid accuracy for typical lists. Proofy's claimed 98.5% accuracy handles most B2C and mid-market B2B lists adequately. The gap with BillionVerify (99.9%) only becomes material at high volumes — roughly 14,000 additional bounces per 1M emails.
Straightforward bulk upload UI. Proofy's interface is simple to navigate. For one-off list cleaning without API integration, the drag-and-drop upload workflow is accessible to non-technical users.
Does not charge for unknown results. Like BillionVerify, Proofy does not bill for emails it cannot definitively classify. This is a fair policy that reduces wasted credits on unverifiable addresses.
Basic SDK coverage. JavaScript, Python, and PHP are supported. Teams using those languages can integrate with minimal friction.
Role account and disposable detection included. Core detection types are available in the standard plan without an additional fee.
The main drawbacks are pricing relative to BillionVerify, credit expiration, limited support hours, slower processing speed, and a smaller SDK library.
Proofy vs BillionVerify: Fast Facts
| Metric | BillionVerify | Proofy |
|---|---|---|
| Accuracy | 99.9% | 98.5% (claimed) |
| Processing Speed | 50K/hour | 20K/hour |
| API Response | Real-time | ~700ms |
| Pricing | From $0.001/email | From $0.003/email |
| Free Trial | 100 daily (ongoing) | 100 one-time |
| Support | 24/7 | Email only |
| Credits | Never expire | Credits expire |
Pricing Comparison
| Plan | Volume | BillionVerify | Proofy | Savings |
|---|---|---|---|---|
| Starter | 20,000 emails | $0.001/email ($20 total) | $0.003/email ($60 total) | $40 (67%) |
| Growth | 100,000 emails | $0.0008/email ($80 total) | $0.0015/email ($150 total) | $70 (47%) |
| Business | 500,000 emails | $0.0004/email ($200 total) | $0.00086/email ($430 total) | $230 (53%) |
| Enterprise | 1M emails | $0.00035/email ($350 total) | Custom / not published | Contact sales |
Key Takeaway: BillionVerify has the lowest per-email price of any major competitor and starts at just $20 for 20,000 emails. Proofy charges $60 for that same volume — BillionVerify is 67% cheaper at entry level. The savings continue at every tier: 47% cheaper at 100K and 53% cheaper at 500K. Combined with 100 free verifications daily and credits that never expire, BillionVerify delivers better value across the board. View our complete pricing details.
Core Verification Features
| Feature | BillionVerify | Proofy |
|---|---|---|
| Syntax Validation | RFC 5322 compliant with IDN and special character support | Standard RFC validation |
| Domain Validation | Real-time DNS lookup with caching | DNS verification |
| MX Record Checking | Deep MX analysis including priority and backup MX identification | Standard MX checking |
| SMTP Verification | Multi-threaded with greylisting detection and intelligent retry | Standard SMTP verification |
| Accuracy Rate | 99.9% | 98.5% (claimed) |
| Processing Speed | 50K emails/hour | 20K emails/hour |
| API Response Time | Real-time | ~700ms average |
Advanced Detection Capabilities
| Detection Type | BillionVerify | Proofy |
|---|---|---|
| Disposable Email Detection | AI-powered with 50,000+ domain database, real-time ML updates | Standard disposable database |
| Catch-All Domain Detection | Multi-address probing, risk scoring, 95% accuracy | Basic catch-all detection |
| Role-Based Email Detection | Detailed categorization: generic (info@, contact@), support (support@, help@), admin (admin@, webmaster@), sales (sales@, business@) | Role account detection |
| Spam Trap Detection | 1M+ identified traps, ISP partnerships, real-time updates | Standard spam trap coverage |
| Greylisting Handling | Automatic retry with intelligent delays | Limited greylisting support |
| International Domain Support | Full IDN support | Partial support |
API and Integration
| Metric | BillionVerify | Proofy |
|---|---|---|
| Average Response Time | Real-time | ~700ms |
| Uptime SLA | 99.99% | Not published |
| Infrastructure | Global CDN (15+ regions) | Standard hosting |
| Rate Limit | 100 requests/second | Not publicly documented |
| Code Libraries | JavaScript, Python, PHP, Ruby, Go, Java | JavaScript, Python, PHP |
| Email Marketing | Mailchimp, SendGrid, HubSpot, ActiveCampaign, Klaviyo, ConvertKit | Mailchimp, some ESP integrations |
| CRM | Salesforce, Pipedrive, Zoho CRM | Limited |
| Automation | Zapier, Make (Integromat), n8n | Zapier |
| Credit Expiration | Never expires | Credits expire |
Need to clean a large list right now? Try the bulk email verification tool.
Frequently Asked Questions
Is Proofy worth it?
Proofy is a functional mid-range verifier with a clean interface and decent accuracy. It is worth considering if you only need JS, Python, or PHP SDK support and do not require live support. However, BillionVerify is cheaper at every volume tier — 67% cheaper at 20K emails — with higher accuracy, faster processing, non-expiring credits, and 24/7 support. For most teams, BillionVerify is the stronger choice.
What is the difference between Proofy and BillionVerify?
The key differences are price, speed, support, and credit policy. BillionVerify is 47–67% cheaper at comparable volumes, processes lists 2.5x faster (50K vs 20K emails/hour), offers 24/7 support versus email-only, and credits never expire. BillionVerify also returns more data per API call — catch-all flag, spam trap score, and confidence score — at no extra charge. Proofy's interface is simpler for non-technical users doing one-off uploads.
How do I switch from Proofy to BillionVerify?
The migration takes under 30 minutes. Create a free account at billionverify.com, generate an API key from the dashboard, then replace Proofy's https://api.proofy.io/verify endpoint and Authorization: Bearer header with BillionVerify's https://api.billionverify.com/v1/verify endpoint and BV-API-KEY header. Use your 100 free daily verifications to test accuracy before fully switching.
Which is cheaper, Proofy or BillionVerify?
BillionVerify is cheaper at every tier. At 20,000 emails, Proofy charges approximately $60 while BillionVerify charges $20 — 67% cheaper. At 100,000 emails, Proofy is $150 versus BillionVerify's $80 (47% savings). At 500,000 emails, Proofy is $430 versus BillionVerify's $200 (53% savings). BillionVerify also has no credit expiration, so every credit you buy retains its value.
Does BillionVerify have features Proofy lacks?
BillionVerify offers higher accuracy (99.9% vs 98.5%), faster bulk processing (50K vs 20K emails/hour), real-time API response versus ~700ms, 24/7 live support, non-expiring credits, 100 free daily verifications, a broader SDK library (6 languages vs 3), and 25+ native integrations versus Proofy's more limited ecosystem. Both include disposable, catch-all, and role-account detection.
Conclusion
Proofy is a functional email verification service suitable for teams with straightforward needs and lists dominated by common email providers. Its clean interface and no-charge-for-unknowns policy are genuine strengths.
But BillionVerify wins on every measurable metric: accuracy (99.9% vs 98.5%), processing speed (50K vs 20K emails/hour), API response (real-time vs 700ms), pricing (lowest per-email rate, starts at $20 for 20K), support (24/7 vs email-only), and credit policy (never expire vs defined expiry). For teams focused on cost, speed, and reliability at any volume, BillionVerify is the stronger choice.
Start with 100 free verifications daily — no credit card required.