Floneum vs Langflow

Floneum

A rare visual LLM workflow tool that runs on your own machine with no account, and its plugin sandbox was a real design decision rather than a checkbox - third-party nodes get only the capabilities you grant. The catch is that it looks abandoned: the repository has been renamed to Kalosm, the editor's source folder is gone from the main branch, and the only app build is still 0.2.0 from 2023.

Pros

• +41 built-in nodes cover generation, embeddings, scraping, files and control flow out of the box
• +Plugins run in a WebAssembly sandbox with scoped access instead of full system rights
• +Plugins can be written in any language that compiles to WebAssembly, with Rust wrappers provided
• +Runs entirely offline against local models, so no per-token bill

Cons

• −The GUI app's last release is 0.2.0 from 2023, and its source folder is no longer on the repository's main branch
• −No hosted version, no collaboration and no shared workflow library
• −Binaries live only on GitHub releases, with no installer or auto-update story
• −Documentation assumes you are comfortable in the Rust ecosystem

Langflow

Langflow is the visual layer most teams reach for when a flow needs to be shown to someone who does not write Python, and the escape hatch into real code keeps it from becoming a toy. Deploying a flow as an API or MCP server in one step is the feature that earns it a place in production. The gap is commercial: no published pricing, no named vendor on the site, and support only via a contact form.

Pros

• +MIT-licensed with roughly 154,000 GitHub stars and an active release cadence
• +Any flow deploys as an HTTP API or an MCP server
• +Runs identically self-hosted, in the free cloud, or as a desktop app
• +Components can be edited as Python when the visual layer runs out

Cons

• −No pricing or support tiers published anywhere on the site
• −Desktop download requires a signup form and covers only Mac and Windows
• −The site names no operating company or jurisdiction
• −Visual flows get hard to reason about once they grow past a screen

Does Floneum or Langflow have a free tier?

Both: Floneum is free to use, and Langflow is free to use.

Which has a public API, Floneum or Langflow?

Langflow ships a public API, as of our last verification. A public API for Floneum is not confirmed by us — check its developer docs before you plan an integration.