The best crypto exchange software for startups is one that balances affordability, security, scalability, and ease of customization. White-label solutions are often ideal because they allow startups to launch quickly without heavy upfront development costs. Key features to look for include a robust trading engine, integrated wallet support, KYC/AML compliance, and liquidity options. It's also important that the bitcoin exchange software provider offers ongoing technical support and regular updates to meet evolving market standards and regulatory requirements. Careful evaluation is crucial.