Comparison
Rails Agent vs LangChain
You already have a Rails monolith. You already have Sidekiq, Postgres, ActionCable and Devise. Why introduce a Python service you have to babysit?
The hidden cost of a second stack
Every LangChain deployment we have seen ends up as a FastAPI microservice, a second CI pipeline, a second observability stack, a second on-call rotation, and a shared Slack channel where nobody wants to be paged.
What Rails Agent gives you instead
- One repo, one deploy, one on-call rotation
- Sidekiq handles background agent runs — you already know it
- Postgres + pgvector for memory and RAG — no new database
- ActionCable for streaming — no websocket rewrite
- Rails Agent Cloud handles the Vercel runtime for you
When LangChain still wins
If your team is majority Python and you need bleeding-edge graph orchestration research, stick with LangGraph. For everyone shipping product in Rails, Rails Agent is the shorter path.