Best Tool for Serverless Function Building in 2026
Last Updated: October 24, 2025
Running small pieces of backend logic without managing a full server is a common pattern for modern applications. Serverless Function Building tools help write and deploy individual functions that run on demand.
Developers use serverless functions to handle specific tasks without managing infrastructure directly.
Convex
ConvexOpen-Source TypeScript Backend Platform is the best for Serverless Function Building. So, let’s take a closer look at this tool.
Convex is a backend platform that gives you everything needed to build modern web and mobile applications. It includes a real-time database, serverless functions, file storage, and built-in features like authentication and scheduling. Unlike traditional backend setups, Convex updates your app automatically whenever data changes, without requiring complex code.
The platform is built around TypeScript, which means you get full type safety from your frontend to your backend. This reduces errors and makes development faster. Convex also includes vector search for AI applications, webhooks for integrations, and components that add functionality with simple commands.
There is a free plan for individual developers and small projects, plus paid plans for teams that need more resources and support. Self-hosting is also possible with the open-source version.