Osmedeus
Declarative YAML orchestration engine for security automation.
Osmedeus is a powerful orchestrator for security pros who live in YAML and need scalable, distributed automation. Its declarative approach and AI integration give it an edge over simpler scanners, but the learning curve is steep for beginners. If you automate security workflows, this is worth the investment.
- Penetration testers automating reconnaissance and scanning workflows
- Red teamers building complex multi-stage attack chains
- Bug bounty hunters managing large-scale, parallel scope scanning
- Security teams requiring scalable, distributed automation across many targets
- Beginners without YAML or security automation experience
- Users needing a GUI-only tool with no CLI interaction
- Non-security professionals looking for general-purpose automation
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In short
Osmedeus — Declarative YAML orchestration engine for security automation. Best for Penetration testers automating reconnaissance and scanning workflows, Red teamers building complex multi-stage attack chains, Bug bounty hunters managing large-scale, parallel scope scanning. Free to use.
Viability Score
How likely is Osmedeus to still be operational in 12 months? Based on 4 signals — momentum (how recently it shipped), wrapper dependency, revenue model, and web presence.
Last calculated: July 2026
How we score →Key Features
- Declarative YAML workflow definitions for security automation
- Flexible execution: local, Docker, SSH, distributed via Redis
- Smart orchestration with conditions, events, scheduling, parallel execution
- Extensible automation with templates, utilities, plugins, HTTP steps
- Built-in AI agents and LLM-powered actions
- Web UI for visualizing workflows, assets, and execution state
- Vulnerability scanning and reconnaissance automation
- Asset management and export capabilities
- Decision routing and on-success actions in workflows
- Parallel module execution with dependency management
- Community-built workflows and modules
- CLI and API access for automation
- Supports bash, Docker, SSH, and agent execution modes
- Conditional logic with switch/case and goto actions
About Osmedeus
Osmedeus is a modern orchestration engine for security that enables automation of security workflows from reconnaissance to vulnerability scanning using declarative YAML. It provides a complete toolkit for security professionals, allowing them to design readable, powerful reconnaissance pipelines with simple YAML definitions. The tool supports flexible execution locally, in Docker, over SSH, or distributed via Redis workers, and includes smart orchestration with conditions, events, scheduling, and parallel execution. Osmedeus is designed for security professionals, including penetration testers, red teamers, and bug bounty hunters, who need to automate complex security tasks. It features built-in AI agents and LLM-powered actions for intelligent automation and decision-making, along with a beautiful web UI for visualizing workflows, assets, and execution state. The three-step workflow—define targets in YAML, execute scans via CLI/API/events, and visualize/analyze results—makes it accessible yet powerful. What sets Osmedeus apart is its declarative YAML syntax, which allows users to define complex workflows with decision routing, conditions, and parallel execution. It integrates agents and LLMs for smarter automation, and its architecture is flexible enough to run locally or at scale with Redis workers. The tool is proven to identify real security vulnerabilities for Fortune 500 companies and is supported by an active open-source community. Osmedeus v5.0, the latest version, offers cleaner, more flexible architecture with next-level performance and power. It has been released with a focus on improving performance and simplifying the workflow definition process. The tool is available as an open-source project with documentation and community support via GitHub and Discord.
Behind the Verdict
Osmedeus is a serious tool for serious security automation. If you're a penetration tester or red teamer who regularly runs reconnaissance and scanning across many targets, its declarative YAML workflows and distributed execution via Redis are a force multiplier. The built-in AI agents and LLM-powered actions add a layer of intelligence that most alternatives lack. Where it falls short: this is not for the faint of heart. If you don't know YAML or have limited experience with security automation pipelines, the learning curve is steep. There's no GUI-only mode—you need to write workflows. For non-security tasks, you'd be better off with a general-purpose automation framework. Compared to tools like Nuclei or ProjectDiscovery's ecosystem, Osmedeus offers higher-level orchestration rather than just running templates. It's closer to a SIEM or SOAR-lite for offensive security. The community is active (6.2k GitHub stars), and v5.0 shows ongoing development. In practice, expect to spend time crafting workflows and debugging YAML. But once set up, the parallel execution and condition routing can cut scan times dramatically. The web UI is useful for visualizing results, but the real power is in the automation layer. For teams that can invest in the setup, Osmedeus delivers.
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Use Cases
- Automate reconnaissance workflows for new targets using declarative YAML
- Run distributed vulnerability scanning across multiple hosts with Redis workers
- Integrate LLM-powered actions for intelligent decision-making in security pipelines
- Design and execute complex multi-step attack sequences with conditions and scheduling
- Visualize scan results and asset data through the web UI for analysis
Limitations
- No information on rate limits or plan gating as the tool is free and open-source.
- However, users may need to manage their own infrastructure for distributed execution.
- The learning curve for YAML workflow definitions may be steep for beginners.
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