Proto.io

Proto.io uses a tiered subscription model with pricing based on the number of projects and users. It offers a 15-day free trial for new users but does not have a permanent free plan. Paid plans typically start around $24 per month for freelancers, providing access to core prototyping features, and scale up to about $80 per month for agencies or teams that need more projects, collaboration tools, and advanced functionality. Enterprise plans are available for larger organizations requiring additional security, centralized management, and priority support. This pricing structure reflects Proto.io’s positioning as a professional-grade prototyping solution designed for individuals, startups, and enterprise teams looking to create high-fidelity, interactive prototypes without coding.