Langchain.rb
Ruby library for building LLM-powered applications, RAG and assistants.
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About Langchain.rb
Langchain.rb is listed in our frameworks category and is aimed at builders. Ruby library for building LLM-powered applications, RAG and assistants. Pricing, as the maker states it: Open source. Maturity: Active. We last checked the official link on 2026-10-18.
Langchain.rb at a glance
- Category: Frameworks
- Built for: Developers and teams building with AI agents
- Pricing: Open source (as the maker states it)
- Licence: MIT License (OSI-approved open source)
- GitHub: patterns-ai-core/langchainrb · 2,005 stars (as of Oct 21, 2026)
- Latest release: 0.19.5, May 1, 2025
- Last commit: Oct 21, 2026
- Official site: rubydoc.info/gems/langchainrb
- Listed on AgentScout: Oct 18, 2026
Langchain.rb FAQ
What is Langchain.rb?
Ruby library for building LLM-powered applications, RAG and assistants.
How much does Langchain.rb cost?
Langchain.rb's pricing, as the maker states it: Open source. Open-source tools are free to use, though you may still pay for model API usage or a hosted plan. Check the official site for current plans.
Is Langchain.rb open source?
Yes. Langchain.rb's GitHub repository is published under the MIT License, according to the licence file in the repo.
Where can I find Langchain.rb's source code?
On GitHub at patterns-ai-core/langchainrb, which had 2,005 stars as of Oct 21, 2026. The latest release is 0.19.5 (May 1, 2025).
What are alternatives to Langchain.rb?
Similar tools include AgentScope, Haystack, Marvin, LangGraph4j, Dynamiq and Claude Agent SDK (Python).
Facts from our link-checked listing, the GitHub repository and the official site. See something wrong? Suggest an edit.
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Langchain.rb alternatives
Other frameworks tools in our directory. See all frameworks tools →
AgentScope
Framework for building and running transparent multi-agent applications with visual debugging.
Haystack
Open-source orchestration framework for building production LLM apps, RAG and agents.
Marvin
Python library from Prefect for building AI agents and structured LLM workflows.
LangGraph4j
Java library for building stateful multi-agent applications as graphs, working with LangChain4j and Spring AI.
Dynamiq
Python orchestration framework for building agentic and RAG applications from reusable nodes and workflows.
Claude Agent SDK (Python)
Anthropic's Python SDK for building agents on Claude Code's agent loop, with the CLI bundled, custom tools and hooks.
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🧭 Task guides: RAG and document tools for building AI agents
💲 Estimate API cost: compare per-request and monthly costs for GPT, Claude, Gemini and Grok models.
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