Comparison

Post Quantum Secure Chat vs Velm

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Post Quantum Secure Chat

Features
Read full description

Secure messaging for the quantum era. PQC Chat is the first consumer messaging app built with NIST-standardized post-quantum cryptography. While traditional encryption may be vulnerable to future quantum computers, PQC Chat uses ML-KEM-768 and ML-DSA-44 algorithms to ensure your private conversations remain private — today and tomorrow. Why Post-Quantum Security Matters Quantum computers pose a real threat to current encryption standards. Data encrypted today could be stored and decrypted later when quantum computers become powerful enough. PQC Chat protects you against this "harvest now, decrypt later" threat. Key Features • True End-to-End Encryption — Messages are encrypted on your device and can only be read by the intended recipient. Not even we can access your conversations. • NIST-Approved Algorithms — Built with ML-KEM-768 for key exchange and ML-DSA-44 for digital signatures, the same standards adopted by governments worldwide. • Secure Image Sharing — Photos are encrypted before leaving your device, ensuring complete privacy for all shared media. • QR Code Contact Verification — Verify contacts in person by scanning QR codes, preventing man-in-the-middle attacks. • Real-Time Messaging — Instant message delivery with read receipts and typing indicators. • No Phone Number Required — Create an account without sharing personal information. • Cross-Platform — Message friends on any device seamlessly. Privacy by Design - No message content stored on servers - No tracking or analytics - No ads, ever - Open cryptographic standards About Post-Quantum Cryptography PQC Chat implements the Federal Information Processing Standards (FIPS) 203 and 204, published by the National Institute of Standards and Technology (NIST) in August 2024. These represent the gold standard in quantum-resistant cryptography. Protect your conversations for the future. Download PQC Chat today. Terms of Use (EULA): https://pqcnow.com/terms-of-service

About

Velm

Features
Read full description

Velm is a hyperlocal group chat app for the strangers within 100 meters of you. Walk into a coffee shop, a stadium, a transit hub, a neighborhood block — you'll see who's chatting nearby, and you can join in. WHY VELM IS DIFFERENT Every group only exists within a 100-meter circle. Walk away, and the group quietly fades for you. Everyone in a group sees you as a temporary identity — a random emoji animal name like "Blue Dolphin" or "Quiet Fox". Your real name, photo, and bio are completely hidden by default. When you click with someone and want to keep talking beyond the moment, both of you can choose to exchange your real "main identity". After two-way consent, you both see each other's real card in that group. Anyone else still sees the temporary identity. You can revoke the exchange anytime — silently, no notification — and the other side will simply stop seeing your real card. WHAT'S INSIDE Ā· Hyperlocal discovery: see active groups in 100 m Ā· Anonymous by default, anonymous always for everyone you haven't exchanged with Ā· Mutual main-identity exchange — opt-in, two-way consent, revokable Ā· No long-term group history accumulates — every group is local and temporary Ā· Lightweight identity: profile is a curated emoji avatar + short bio + up to 5 interest tags Ā· Real-time chat with reactions and quick presence PRIVACY FIRST Ā· Precise location is used only to find groups within 100 m of you. We never sell it, and never share it with third parties. Ā· Default identity in any group is temporary and random — your account name is hidden. Ā· Phone numbers, emails, and contact lists are never shared inside groups. Ā· Strong server-side privacy contracts: when you revoke an identity exchange, every server interface stops carrying your main identity, immediately. WHO VELM IS FOR Ā· People who want to meet the neighbors / strangers in their immediate world Ā· Travelers, students, festival-goers, fans at a stadium, regulars at a co-working space Ā· Anyone curious about the conversations happening in their 100 meters that they've never heard

Screenshots

Post Quantum Secure Chat4 screens
Velm3 screens

Verdict

The call

The clearest difference is in-app purchases: Velm at none against Post Quantum Secure Chat's 2. Post Quantum Secure Chat's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price and ads there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. Post Quantum Secure Chat sells 2 in-app purchases, starting at $4.99 per month. Velm asks for nothing beyond the download.

Scorecard3 real differences Ā· 3 level
Post Quantum Secure Chat versus Velm: the parameters behind the verdict, then further details
ParameterPost Quantum Secure ChatVelm
PriceFreeFree
Update frequencyEvery 11 days—
AdsNoNo
In-app purchasesYesNo — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better17.0
Further details — not scored
Size35 MB3 MB
Age rating4+17+
DeveloperZincirxå„•ę“‹ ęØ

In-app purchases

2 purchases

Post Quantum Secure Chat

Subscriptions2
  • Monthly Subscription$4.991 Month
  • Annual Subscription$29.991 Year
None

Velm

No in-app purchases

Questions

Is Post Quantum Secure Chat free?
Post Quantum Secure Chat is free to download, with in-app purchases available.
Is Velm free?
Velm is free to download, with no in-app purchases.
Do Post Quantum Secure Chat or Velm have ads?
Neither Post Quantum Secure Chat nor Velm shows ads.

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