Best 5 LLM Application Builder to use in 2025

Langflow is an open-source platform for building AI applications through a visual interface. You create workflows by connecting building blocks called components. Each component performs a specific task, such as loading data, talking to an AI model, or storing information in a database.

StackAI is a platform where you build AI agents through a visual canvas. Instead of coding, you drag components onto a screen and connect them together. These components can be language models, your company documents, or connections to other software you use.

Vellum is a platform that helps you create AI applications from start to finish. You can build chatbots, content tools, data analysis systems, or custom AI assistants. The platform works with all major AI models including GPT-4, Claude, and open source options.

Dify is a complete platform for building AI-powered applications using a visual interface. You can create workflows by connecting different components without writing code. The platform supports many AI models from providers like OpenAI, Anthropic, and others, letting you switch between them easily.

Flowise is a visual development platform for creating AI-powered applications using large language models. Think of it as building blocks for AI: you drag components onto a canvas and connect them together to create smart systems.