Floneum

Floneum is a drag and drop graph editor for building local LLM workflows, with 41 built in nodes and WebAssembly plugins that run in a sandbox with tightly scoped resource access.

Floneum is a graph editor for composing language model workflows on your own machine. Instead of chaining prompts in code, you drag nodes onto a canvas and wire them together, connecting text generation, structured output, embeddings, searches and file operations into a single pipeline. The homepage frames it as a multi tool for language tasks, and the demo shows a question answering flow assembled from connected blocks rather than written scripts. Under the hood the editor is extensible through plugins. Floneum ships with 41 built in nodes grouped by function: embedding and embedding database nodes, text and structured text generation, search, file read and write, Python execution, browser control, RSS reading, string splitting, list handling, arithmetic, comparisons and boolean logic. Because these blocks are ordinary nodes, a workflow can branch, loop over lists and transform data between model calls without leaving the canvas. Plugins run inside a WebAssembly sandbox. Each one receives access only to the specific resources it needs, such as a model, an embeddings service or an embedding database, rather than full system access. That isolation is the main security argument for the design. Developers can write plugins in any language that compiles to WebAssembly, with ergonomic wrappers provided for Rust and support noted for C, Java and Go. The developer documentation covers building a first plugin end to end. The tool suits people who want private, local language model pipelines but prefer a canvas to a codebase: tinkerers assembling retrieval and question answering flows, and developers packaging custom logic as reusable nodes for less technical colleagues. It sits closer to node based automation editors than to chat interfaces or hosted agent builders, and its emphasis on running models locally and restricting plugin permissions separates it from cloud first alternatives. The homepage does not publish pricing, so it is unclear whether commercial editions exist. Expect a learning curve around the graph model and, for plugin authors, around the WebAssembly toolchain.