Bisq

Bisq, also known as Bitsquare, operates as a decentralized peer-to-peer cryptocurrency exchange. The platform is an open-source desktop application that enables users to trade Bitcoin and a variety of other cryptocurrencies directly with one another without relying on a central custodian. Transactions are facilitated through Tor network integration to enhance user privacy and through multisignature escrow contracts that lock funds until both parties fulfill trade terms. Bisq does not require Know‑Your‑Customer (KYC) or anti‑money‑laundering (AML) verification, positioning it as a service for users who prioritize censorship resistance and anonymity. The organization’s headquarters is located in Switzerland. While specific user numbers or trading volumes are not disclosed in the provided sources, the service is accessible globally to anyone with internet access and the ability to run the software.

Bisq’s distinguishing attributes include its commitment to decentralization, open‑source transparency, and strong privacy protections derived from Tor usage and non‑custodial trade execution. The software’s code is publicly available for review, allowing community contributors to audit and improve security measures. In April 2020, a critical security flaw introduced in a recent software update was exploited, leading to the theft of approximately $250,000 worth of Bitcoin and Monero from at least seven users. Attackers manipulated trade fallback addresses and time limits to divert funds, prompting Bisq to release a hotfix that patched the vulnerability. The hotfix, while resolving the exploit, caused operational disruptions such as failed transactions and temporarily inaccessible funds for some users who upgraded to the patched version. Bisq advised affected traders to review open trades and seek mediation through the platform’s built‑in dispute resolution process to resolve any remaining financial locks. This incident highlighted the challenges of maintaining security in a rapidly evolving, decentralized exchange environment and underscored the importance of thorough code review before deploying updates.