Alloy is an open-source agent engine designed specifically for the Elixir programming language, enabling the creation and orchestration of autonomous agents that operate within the Elixir and Erlang/OTP environment. The platform focuses on providing a minimal, extensible foundation for building agent-based workflows, allowing developers to run agents as supervised GenServers with real parallelism and fault isolation. Alloy is MIT licensed and does not require HTTP servers, databases, or external frameworks, emphasizing a "just the engine" approach for maximum flexibility and minimal dependencies.
The engine supports multiple AI providers, including Anthropic, OpenAI, Google Gemini, xAI, Ollama, OpenRouter, DeepSeek, and Mistral. Developers can swap models or providers with a single line of configuration, and adding new providers requires implementing a single behaviour module. Agents can execute core tools—read, write, edit, and bash—as well as custom tools defined by the user. Tool execution is parallelized with true concurrency, and the system supports token-by-token streaming with SSE support. Middleware hooks are available for telemetry, logging, and enforcing policies such as spend caps or security restrictions.
Alloy enables multi-agent collaboration by allowing teams of specialized agents to be spun up under a supervisor, delegating, broadcasting, or handing off tasks as needed. Each agent operates in a fault-isolated manner, so the failure of one does not affect the others. Agents can also share context optionally and persist conversations across crashes, leveraging OTP's supervision trees for resilience. The platform provides automatic conversation summarization to manage token limits and keep agents effective during extended sessions.
The tool is intended for Elixir developers seeking to integrate autonomous agent capabilities into their applications, with a focus on extensibility and transparency. With only three dependencies (jason, req, telemetry), Alloy remains lightweight and easy to audit. Its open-source MIT license ensures there is no vendor lock-in, and the platform is positioned as a pure OTP-native agent engine for Elixir.
In the Autonomous agents & workflows space, Alloy Labs takes a focused approach. It focuses on building and running autonomous AI agents in Elixir with flexible provider and tool integration. It is built as an open-source project for elixir developers building AI agent systems. Alloy Labs is open source under the MIT license. Alloy Labs is available on the command line.
Alloy Labs first shipped in 2026. Development happens publicly on GitHub with 76 stars and 32 commits in the last 90 days. PulseGate's similarity index finds few close equivalents — Alloy Labs occupies a relatively distinct niche. Key capabilities include agent orchestration, provider swapping, and parallel execution.
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