Algorand, Sui, Aptos and QRL: The Chains Moving First on Post-Quantum
Why look at smaller chains?
Smaller or newer networks can change faster than the giants, so they act as test labs. What they learn about wallets, fees and migration helps everyone. Below is what each says itself. These are project statements, so treat them as claims to verify, not independent audits.
Algorand: Falcon first
Algorand's own page reports that State Proofs, introduced in 2022, compress ledger state every 256 rounds and are signed with Falcon by node runners holding a supermajority of stake. It says Falcon-based accounts using LogicSignatures went live in November 2025, and native Falcon-1024 accounts reached Mainnet in August 2026 after the v5.0.0 upgrade reached its approval threshold. Accounts can be generated from the usual 25-word mnemonic. A June 2026 roadmap targets broad quantum resilience by the end of 2027, with post-quantum multisig, Falcon-512 support and research on quantum-resistant consensus signatures still ahead. Falcon is the compact choice (compared here), and Algorand's design leans on that.
Sui: two families, same address
Sui's August 2026 post describes ML-DSA-65 as a native scheme for everyday accounts and SLH-DSA-SHA2-128s inside Move contracts for high-value vaults, so a flaw in one math family would not necessarily hit the other. The migration design is the friendliest we found: the new private key is a 32-byte seed derived from your existing recovery phrase, and address aliases let an account swap its authorization key while keeping the same address and assets. Targets, not commitments: quantum-safe vaults on Mainnet in 2026, ML-DSA-65 accounts on Testnet by end of 2026, native authentication on Mainnet in Q1 2027, all subject to audits and Testnet feedback. Sui says verification cost is close to Ed25519, though signatures are substantially larger.
Aptos: AIP-137
Aptos Labs proposed AIP-137, reported in December 2025, to add SLH-DSA as an optional account type, with Ed25519 staying the default and no network-wide migration. It would use SHA-256, which Aptos already relies on. Tradeoffs are larger, slower-to-verify signatures. Aptos Labs framed it as cautious long-term preparation. We did not find confirmation that governance approved it, so check Aptos governance for the current status.
QRL: quantum-resistant from the start
The Quantum Resistant Ledger launched with XMSS, a stateful hash-based scheme. Its theqrl.org material describes QRL 2.0 (Project Zond) as a proof-of-stake network aimed at the Ethereum developer ecosystem, with an EVM-based environment and a Solidity-derived language called Hyperion, and says the signature scheme has moved to ML-DSA-87. A recent post says audits were about 50% complete, and an earlier headline had pointed to Q1 2026 audit readiness, so timelines have slipped. We found no confirmed mainnet date for 2.0.
Patterns to notice
| Chain | Main scheme | Status (reported) |
|---|---|---|
| Algorand | Falcon-1024 | Native accounts live, Aug 2026 |
| Sui | ML-DSA-65 plus SLH-DSA vaults | Targets through Q1 2027 |
| Aptos | SLH-DSA (proposed) | Proposal, approval unverified |
| QRL | ML-DSA-87 | 2.0 pre-mainnet |
Everyone is keeping the old signature option alive and adding new ones, which is crypto agility in action. Nobody has to throw users overboard. This is education, not financial advice, and listing a chain here is not an endorsement or price view. The QNT memecoin is independent of Quantinuum Ltd and of all these projects.
Sources and further reading
- Algorand: leading on post-quantum technology
- Sui: making Sui quantum ready
- Decrypt: Solana and Aptos harden blockchains
- QRL: celebrating 8 years
- QRL weekly update, September 2025
Reported as of 2026-10-09. Roadmaps and proposals change often, so check the primary documents. Nothing here is financial advice. The QNT memecoin is independent of Quantinuum Ltd, the real company, and of every lab, chain and government named on this page.
Frequently asked questions
Which blockchain has live post-quantum accounts?
Algorand reports native Falcon-1024 accounts live on Mainnet since August 2026. Check each project directly, as these are the projects' own statements.
Can I keep my Sui address when moving to quantum-safe keys?
Sui says address aliases let an account change its authorization key while keeping the same address and assets, and keys derive from your existing recovery phrase.
Is QRL 2.0 live?
We found no confirmed mainnet date. Sources read describe it as in final audit phases.
Keep reading
- Falcon vs ML-DSA vs SLH-DSA vs Winternitz: Picking a Quantum-Safe Signature
A readable comparison of the main post-quantum signature families that blockchains are considering, with their trade-offs. - Ethereum and Solana Post-Quantum Plans: What Is Real in 2026
Ethereum's four-part quantum roadmap and Solana's Winternitz Vault and testnet work, with dates and honest caveats. - Quantum and Crypto Roadmaps Compared: Bitcoin, Ethereum, Solana and Others
Side by side: how Bitcoin, Ethereum, Solana, Algorand and Aptos are planning for post-quantum security, with dates and status as reported in 2026. - What Governments and Blockchains Are Saying About Quantum and Crypto
How Solana, Bitcoin and Ethereum are responding to the quantum threat in 2026, and how it links to government post-quantum policy.
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