Automate your stablecoin stack: wallets, payments and payouts, on one open platform.
github.com/fystack
Joined March 2025
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Last week, @fystack joined Hack Seasons Conference Ho Chi Minh City as a sponsor, alongside @securosys, @Ledger, @SonicLabs, @birdeye_so , @Mercuryo_io and others.
What stood out throughout the day was how naturally conversations moved between traditional finance and digital assets.
We had the chance to speak with banks, payment companies and exchanges about where the industry is heading, from stablecoins and institutional adoption to custody, compliance and security.
One thing was clear: the conversation is becoming much more practical. It's no longer just about whether institutions are interested in digital assets, but how they can actually operate them securely and compliantly.
Thanks to @mpost_io team for the support throughout the event!
We’re proud to share that Fystack is now ISO/IEC 27001:2022 certified, the international standard for information security management.
An independent auditor reviewed how we protect our systems and our customers’ data. Security is built into every layer:
- Applications: secure development practices, code review and continuous testing.
- Dependencies: we monitor third-party libraries and patch known vulnerabilities quickly.
- Cloud and containers: hardened infrastructure, least-privilege access, and isolated workloads.
- Internal access: our team works on a zero-trust network and signs in with hardware security keys.
Private keys are never held in one place, thanks to our MPC wallet design. Our MPC engine is open source: github.com/fystack/mpcium
Security isn’t a one-time milestone. It’s a commitment we renew every day.
See all our security controls on our Trust Center: trust.fystack.io
Thank you to our team and partners for helping us get here!
These are 3 ways African fintechs can turn stablecoin demand into business opportunities.
Explore each model in more detail: fystack.io/blog/stablecoin-p…
3. OTC desks and B2B settlement
Businesses moving larger amounts across borders need reliable ways to trade, convert and settle stablecoins.
This creates opportunities for fintechs offering OTC services and B2B payment infrastructure.
2. Merchant stablecoin payment gateways
Merchants need ways to accept payments from international customers without relying entirely on traditional cross-border payment rails.
Fintechs can build gateways that help businesses collect stablecoins and track incoming payments.
1. Stablecoin off-ramps to mobile money
Users may hold USDT or USDC, but still need local currency for everyday payments.
Fintechs can bridge this gap by converting stablecoins into local currency and paying out through mobile money or bank transfers.
Stablecoin adoption is creating new business opportunities across Africa.
Here are 3 business models worth exploring 🧵
Muxed contract addresses are a big one for anyone running wallets or custody. One contract, many customers, clean tracking per deposit. That’s exactly the kind of thing that makes life easier at scale. Love seeing Stellar ship practical upgrades like this.
Having MPC is not enough. You also need to control what gets signed.
Binance’s $6.3B hack shows why. Binance found no evidence of a private key leak. Its Nov 3 report traces how attackers moved from a fake job interview to compromised engineer devices, then to the wallet signing system.
MPC protects the key by splitting the signing process, so no single machine holds the full key. It does not decide whether a transaction should be signed.
That takes more layers:
• MPC: protects key management and signing
• Access control: who can act
• Transaction policies: which transfers are allowed
• Approval workflows: who must sign off, and when
• Monitoring: what looks wrong, in real time
Assume a laptop will be compromised. Build so it can’t reach what signs.
At @fystack, policies run before signing, not after.
Most crypto losses at companies don’t need a hacker. They need one person with too much access.
Fystack fixes that with workspaces:
- each team gets its own wallets and API keys,
- each person gets a role,
- and withdrawals need 2 of 3 signers before they go out.
Under it is the signing engine we open-sourced. Keys are split across nodes, so the full private key is never in one place.
Read the code: github.com/fystack/mpcium
A secure wallet is not enough to protect customer funds.
Crypto exchanges and OTC desks need to secure every step, from deposit detection and transaction signing to approvals, treasury operations, and reconciliation.
But each has different operational risks.
Explore the 6 layers of digital asset infrastructure and the controls that matter for each.
Read the full guide: fystack.io/blog/digital-asse…
Fystack now runs on @Helius, with sponsored credits from @SuperteamVN.
Faster Solana underneath. Same self-hosted control on top.
Huge thanks @superteam, @SuperteamVN and @Helius.
Most stablecoin treasury platforms are built for US and European markets.
But APAC has different needs.
From local regulations to deployment requirements, fintechs need to evaluate more than just features.
We compared 10 stablecoin treasury platforms for APAC fintechs and payment providers, including their strengths, limitations, and pricing.
Read the full comparison: fystack.io/blog/best-stablec…
This is what banks actually care about. Not hype. Freeze, clawback, and controls built right into the network. U.S. Bank tested all of it on a public chain. That’s a huge signal for every bank still on the sidelines. Love to see it on Stellar.
“Boring” is the best compliment in finance. Banks don’t want exciting. They want rails that just work. Stellar figured that out early. Proud to be building in this ecosystem. Let’s go!
Privacy and compliance in one stack. This is exactly what banks need before they go onchain. Big win for the Stellar ecosystem.