React forms handle user interfaces, but backend processing for submissions requires additional solutions. Two common approaches are building your own serverless function or using a hosted form backend service. Serverless functions, often deployed with platforms like Vercel or Netlify, offer maximum control over data handling, validation, and integration with other services. This DIY approach is beneficial for complex operations like checkouts or account workflows where custom authorization and database transactions are crucial. However, maintaining these functions involves managing spam protection, rate limits, and monitoring, consuming valuable development time.Hosted form backend services, like onsubmit.dev, abstract away this infrastructure, providing ready-made endpoints for form submissions. This is ideal for simpler forms such as contact or feedback forms, especially on static sites, as it minimizes operational overhead. While offering faster development, this approach introduces vendor dependency and requires evaluating the provider's security model. The decision hinges on the complexity of the required backend logic and the team's preference for managing infrastructure versus development time. Ultimately, the key consideration is where development resources are best allocated, whether on custom backend code or leveraging existing services.