Bubble

Bubble lets you build production-grade web applications without writing code, with a visual editor that connects to databases, APIs, and custom logic through workflows. The platform handles two-sided marketplace workflows (vendor panels, buyer checkout, review systems) and multi-tenant portals where each customer gets their own workspace and data isolation. It's built for apps that need complexity: dynamic pricing, complex permissions, real-time updates, and integrations with third-party services.

Bubble works best for founders and small teams building SaaS tools, internal portals, and customer-facing applications that require custom business logic. If you need to launch a marketplace or member portal faster than traditional development but don't want the constraints of template builders, Bubble gives you enough control to scale. The learning curve is steeper than page builders, but the flexibility pays off for anything beyond simple content sites.