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111 hand-verified payments projects deployed on or supporting Optimism. The sector involving services or platforms that facilitate the transfer of cryptocurrencies or other digital assets from one person or entity to another, often in exchange for goods or services within the decentralized economy.
111 projects found · Last updated Sep 11, 2026
Optimism (OP Mainnet) is a Layer 2 optimistic rollup chain on Ethereum that processes transactions off-chain and posts batched data to L1 for settlement. The rollup inherits Ethereum security through fraud-proof verification, where invalid state transitions can be challenged within a withdrawal period. Developers deploy unmodified Solidity contracts with reduced gas costs while users access decentralized applications at significantly lower fees than mainnet.
View the Optimism profile →Showing 101–111 of 111 results
PaymentsOnchain earnings truly spendable
Minisend is a stablecoin payments company serving Africa. It lets users convert USDC and USDT from multiple blockchains into local currency via mobile money or bank transfer.
One app for USD, EUR, and GBP accounts that also trades, predicts, and spends.
Hurupay, rebranding to Kolan, is a payments company providing virtual USD, EUR, and GBP accounts for freelancers, remote workers, and businesses in emerging markets. It lets users receive international payments, hold stablecoins, and spend through linked cards.
Simple crypto infrastructure
SimpleFi is a crypto payments and infrastructure company. It builds tools for merchants, users, and communities to transact and coordinate using digital assets.
PaymentsYour easy bridge from mobile money to digital currency
Taran App is a digital money exchange service that converts mobile money to stablecoins and back. It serves individuals and small businesses across parts of East Africa and the Horn of Africa.
PaymentsReceive money overseas with ease
SFx Money App is a payments company offering a stablecoin-based money app for African expats and international students. It enables free cross-border transfers, USD wallets, and virtual cards between Africa, Turkey, the US, and Europe.
Your money, your keys
Secuwa is a self-custody crypto wallet provider. It lets users manage savings, tokenised assets, and trading through a passkey-secured wallet without seed phrases.
PaymentsSend Money Globally
Madhouse Wallet is a stablecoin off-ramp API provider for businesses. It helps wallet providers and exchanges convert stablecoins to local fiat across multiple currencies through a single integration.
Get Paid Anywhere, Cheaper, Faster
InFlow Pay helps businesses in emerging markets collect international payments at lower costs through fast cross-border payment processing.
Borderless payroll for global businesses and remote talent
BloccPay is a cross-border payroll and invoicing platform. It helps businesses pay remote teams and lets freelancers get paid in stablecoins or fiat.
PaymentsAccept crypto with instant naira payouts
StableFlow is a crypto payments company that lets Nigerian businesses accept stablecoin payments. It automatically converts and settles funds as naira directly into merchant bank accounts.
Infrastructure for Money
HIFI is a company providing infrastructure for money through developer APIs. It helps businesses move, convert, and route value across stablecoins and bank rails.