Kastra vs Reduck

Control what your AI is allowed to do. Sub-millisecond authorization for every prompt, tool call, shell command, and API request.

Ready-made automation scripts for LinkedIn, Twitter, Reddit and more, or write your own.

About Kastra

Control what your AI is allowed to do. Sub-millisecond authorization for every prompt, tool call, shell command, and API request. Before an action runs, Kastra evaluates attribute-based policy in under one millisecond and returns allow, deny, redact, or hold. Recorded decisions form a cryptographically chained audit trail so operators, auditors, and agents can explain why something was permitted. Use the Kastra HTTP API from production agents, install Kastra Edge on developer machines to govern Claude Code, Cursor, and Codex, or connect an MCP client to read governance data.

About Reduck

Ready-made automation scripts for LinkedIn, Twitter, Reddit and more, or write your own. Reduck lets your agent create and run scripts for fast and reliable browser automation. Unreliable Results vary from run to run, and get worse as the context grows. Fast Tools are deterministic scripts, so they run in milliseconds, with no step-by-step thinking. 02 Reduck runs deterministic scripts in your own Chrome, no credentials exposed, no bot detection. Reduck can sweep X for the posts driving a topic and profile the accounts behind them.