Proof of Holdings vs Vonage Verify
Vonage charges $0.057 per verification plus SMS channel fees. Proof of Holdings verifies any digital asset — phone, email, domain, wallet, social — from €0.0079 per proof with zero delivery failures.
Feature Comparison
| Feature | Proof of Holdings | Vonage Verify |
|---|---|---|
| Phone verification | Telegram, WhatsApp, SMS | SMS, Voice, Silent Auth, WhatsApp |
| Email verification | Magic Link, OTP | OTP |
| Domain verification | DNS TXT, HTTP, Admin Email, Auto-Verify | |
| Wallet verification | 8 chains (ETH, SOL, BTC, BNB, COSMOS, TRON, ADA, HBAR) | |
| Social verification | 12+ platforms (GitHub, Google, LinkedIn, X, etc.) | |
| Reverse OTP | ||
| Cryptographic proof tokens | RS256 JWT, offline-verifiable | |
| Human-in-the-loop approvals | Telegram/WhatsApp with proof tokens | |
| MCP server for AI agents | 131 tools | |
| Delivery failure rate | 0% (user-initiated) | 10-30% internationally (SMS) |
| SIM-swap resistant | ||
| Silent Network Auth | ||
| Free tier | 300 proofs/month |
Pricing
Platform fee per verification
Proof of Holdings
€0.0079/proof (Business plan, any asset)
Vonage Verify
$0.057/verification (platform fee only)
Total cost (phone SMS, Europe)
Proof of Holdings
€0.0079 total (all-in)
Vonage Verify
$0.057 + SMS channel fee (€0.05-0.10+ per SMS)
Free tier
Proof of Holdings
300 proofs/month
Vonage Verify
No free tier
Multi-asset pricing
Proof of Holdings
Same €0.0079 for phone, email, domain, wallet, social
Vonage Verify
Phone and email only — no domain, wallet, or social
Reliability
Vonage Verify sends an SMS or voice call to the user. Like all SMS-based verification, 10-30% of messages fail to deliver internationally due to carrier filtering, number portability, and regional regulations.
Proof of Holdings uses Reverse OTP: the user sends a message to the service via Telegram, WhatsApp, or . Since the user initiates the message, delivery failure is 0%.
Vonage offers Silent Network Authentication as an alternative — carrier-level verification with zero user interaction. This works well where carrier partnerships exist but has limited global coverage and doesn't work on WiFi.
0%
Delivery failure (Proof)
10-30%
SMS failure internationally (Vonage)
30+
Verification channels (Proof)
True Cost Comparison
Vonage's pricing has two layers: a $0.057 platform fee per successful verification, plus SMS channel fees that vary by country. In Europe, SMS costs can add €0.05-0.10+ per message. Total cost per phone verification in Europe: $0.10-0.16+.
Proof of Holdings charges a flat €0.0079 per proof on the Business plan. This covers any asset type — phone, email, domain, wallet, or social. No additional channel fees. The price is the price.
For 10,000 phone verifications in Europe, Vonage costs approximately $1,000-1,600+. Proof of Holdings costs €79 (Business plan).
Security
SIM-swap attacks compromise SMS-based verification. Vonage Verify's SMS and voice channels are vulnerable to this attack vector. Their Silent Auth avoids it but has limited coverage.
Proof of Holdings is immune to SIM-swap attacks — Reverse OTP requires the user to send a message from their actual messaging app. An attacker would need to compromise Telegram or WhatsApp, not just the phone number.
Every verification produces an RS256-signed JWT proof token verifiable offline. Vonage returns a status flag with no cryptographic attestation.
When to use Vonage Verify
- You need Silent Network Authentication (carrier-level, zero-interaction verification)
- You want an enterprise CPaaS platform with voice, video, and SMS in one suite
- Your use case is strictly phone verification in markets with good carrier coverage
- You need the Vonage ecosystem (Programmable Voice, Video API, etc.)
When to use Proof of Holdings
- You need to verify more than phone numbers (domain, wallet, social accounts)
- You want cryptographic proof tokens for every verification
- You operate internationally where SMS delivery is unreliable
- You need human-in-the-loop approvals for AI agents
- You want predictable, all-in pricing without channel surcharges
- You want 90%+ lower cost per verification
Frequently Asked Questions
Ready to try Proof of Holdings?
300 free proofs per month. No credit card required.