Substructure vs SynCodeLive

subs is an agent harness for the cloud. It runs an unprivileged agent loop with no system access. It uses MCP servers for tools. It can run locally or as a client and server.

A real-time collaborative code editor with an AI reviewer in every session. Share a URL, code together live, run JS and Python in-browser. No signup, free.

About Substructure

subs is an agent harness for the cloud. It runs an unprivileged agent loop with no system access. It uses MCP servers for tools. It can run locally or as a client and server. Create the project from the file, then give it your LLM key. Configure the engine to send a webhook to your system and take complete control over the agent loop and Slack agent behavior. You handle a webhook, customizing just the steps you care about.

About SynCodeLive

A real-time collaborative code editor with an AI reviewer in every session. Share a URL, code together live, run JS and Python in-browser. No signup, free. SyncodeLive is a real-time collaborative code editor, open a session, share the link, and you're pair-programming in seconds. Go, Rust, Java, C++, Ruby, SQL, Shell and 20 more run through an LLM-powered execution layer that returns output as if the compiler were installed. Click "new session" and SyncodeLive generates a 6-character URL, like syncodelive.com/x7k2mq .