Proof of Holdings vs Plivo Verify
Plivo advertises $0 verification fees — but you pay full SMS channel costs per message. Proof of Holdings charges €0.0079 per proof, all-in, for any asset type worldwide.
Feature Comparison
| Feature | Proof of Holdings | Plivo Verify |
|---|---|---|
| Phone verification | Telegram, WhatsApp, SMS | SMS, Voice, WhatsApp |
| Email verification | Magic Link, OTP | |
| Domain verification | DNS TXT, HTTP, Admin Email, Auto-Verify | |
| Wallet verification | 8 chains | |
| Social verification | 12+ platforms | |
| Verification fee | €0.0079/proof (includes everything) | $0 (but you pay full SMS channel costs) |
| Reverse OTP | ||
| Cryptographic proof tokens | RS256 JWT, offline-verifiable | |
| Fraud protection | Inherent (user-initiated Reverse OTP) | AI Fraud Shield (SMS pumping detection) |
| HITL approvals | Telegram/WhatsApp with proof tokens | |
| MCP server | 131 tools | |
| SIM-swap resistant |
Pricing
Verification fee
Proof of Holdings
€0.0079/proof (all-in)
Plivo Verify
$0 verification fee
Total cost per verification (Europe)
Proof of Holdings
€0.0079 total
Plivo Verify
$0 verification + SMS channel cost ($0.009 US, $0.08 France, varies by country)
Total cost per verification (international)
Proof of Holdings
€0.0079 total, flat worldwide
Plivo Verify
$0 verification + $0.009/SMS (US), $0.08/SMS (France), country-variable
Asset coverage
Proof of Holdings
Phone, email, domain, wallet, social — same price
Plivo Verify
Phone only (SMS, Voice, WhatsApp)
The $0 Verification Fee — What It Really Means
Plivo's headline is compelling: $0 verification fee. But this means they don't charge a platform fee — you still pay the full SMS channel cost for every message sent.
SMS costs on Plivo start at $0.0055 per SMS + carrier surcharges ($0.0085-0.0105 total in US) in the US and go much higher internationally — $0.05-0.50+ depending on destination country, plus carrier surcharges on all usage.
Proof of Holdings charges €0.0079 per proof which includes everything — no separate channel fees, no carrier surcharges, no country-variable rates. For most international use cases, Proof of Holdings is significantly less expensive despite having a non-zero verification fee.
Plivo's $0 fee is a marketing distinction, not a cost advantage. The total cost per verification matters, and it's higher on Plivo for most international destinations.
Fraud Protection: Two Approaches
Plivo offers an AI Fraud Shield that detects and blocks SMS pumping fraud (artificially inflated traffic). This is a real problem for SMS-based verification — attackers trigger thousands of OTP messages to premium-rate numbers.
Proof of Holdings doesn't need SMS fraud protection because Reverse OTP is inherently fraud-resistant. The user initiates the message, not the service. There's nothing to pump. SMS pumping attacks are structurally impossible with Reverse OTP.
Reliability
Plivo sends SMS or voice OTP to the user. SMS delivery fails 10-30% internationally due to carrier filtering and regulations.
Proof of Holdings uses Reverse OTP: the user sends a message to the service. 0% delivery failure since the user initiates the action.
When to use Plivo Verify
- You're doing high-volume US-only phone verification where $0 fee + low US SMS rates is attractive
- You need Plivo's AI Fraud Shield for SMS pumping protection
- You're already in the Plivo ecosystem (voice, SMS)
When to use Proof of Holdings
- You verify users internationally (our flat rate beats their country-variable SMS costs)
- You need more than phone verification (email, domain, wallet, social)
- You want cryptographic proof tokens for every verification
- You want inherent fraud resistance without needing an AI fraud shield
- You want 0% delivery failure with Reverse OTP
- You need HITL approvals for AI agents
Frequently Asked Questions
Ready to try Proof of Holdings?
300 free proofs per month. No credit card required.