Hercules is an open-source AI testing agent developed by TestZeus, available at testzeus.com/hercules and on GitHub under the test-zeus-ai organization. It is described as the world's first open-source testing agent and is designed to automate end-to-end software testing without requiring testers to write code. The agent converts plain Gherkin-style natural language steps into fully automated test executions across multiple test types. Hercules supports UI, API, security, accessibility, mobile, and visual validation testing. It operates as an autonomous agent with self-healing capabilities, meaning it can adapt its approach at runtime to reach a stated testing goal without manual intervention. Execution artifacts such as videos and logs are recorded to facilitate debugging and audit trails. The agent is model-agnostic and works with a range of LLM backends including OpenAI, Anthropic, Groq, Llama, and Mistral, giving teams flexibility in choosing their AI provider. It is distributed as a Python package installable via pip or as a Docker image, making it straightforward to integrate into existing CI/CD pipelines. As of mid-2026, the GitHub repository (test-zeus-ai/testzeus-hercules) was actively maintained with recent commits through June 2026, approximately 900+ GitHub stars, 169 forks, and an AGPL-3.0 license. The project has been featured at industry QA events and has attracted community contributions. TestZeus also offers a cloud-hosted version of Hercules for teams that prefer not to self-host. Key features: - No-code test automation: converts Gherkin natural language steps into automated test runs - Multi-type testing: UI, API, security, accessibility, mobile, and visual validation - Model-agnostic: supports OpenAI, Anthropic, Groq, Llama, and Mistral LLM backends - Self-healing autonomous agent: adapts at runtime to reach testing goals without manual fixes - CI/CD integration: installable via pip or Docker, ready for pipeline use - Execution recording: captures videos and logs for every test run - Platform adaptability: includes support for complex enterprise platforms like Salesforce - Active open-source project: AGPL-3.0 license, maintained through mid-2026 with community contributions
Open-source and free to self-host (AGPL-3.0). Cloud/enterprise pricing not publicly listed; contact TestZeus for enterprise plans.