Pick Langflow if
developers and applied-AI teams who want a visual LangChain-style graph they can still edit as Python.
Read the Langflow pageLangflow vs LangSmith
Our take
Pick Langflow if developers and applied-AI teams who want a visual LangChain-style graph they can still edit as Python. Pick LangSmith if engineers who already write agent code and will open traces when a run surprises them. Skip Langflow if non-technical ops teams that need Slack/HubSpot glue, or anyone who will not run a local server and bring their own model API keys.
LangSmith
LangChain’s hosted observability and eval
Best for
Langflow Prototyping an agent
LangSmith See what an agent did, then score it
Free plan
Langflow $0 · no license fee (MIT). You run uv pip install langflow or Docker. You pay your own LLM/provider bills
LangSmith $0 · / seat / month. 1 seat. 5,000 base traces/month, then pay-as-you-go. 7 LSU Fleet allowance/month. Community support
Lowest paid
Langflow Not published by the vendor
LangSmith Plus $39/mo
Coding agent
Langflow Visual agent canvas
LangSmith
Runs where
Langflow Local; you host it
LangSmith Hosted
Watch out
Langflow You bring the model key
LangSmith Traces after 5k / 10k bill in arrears
Last checked
Langflow 2026-10-19 · docs.langflow.org/get-started-installation
LangSmith 2026-10-22 · langchain.com/pricing
Which one, then?
Pick LangSmith if
engineers who already write agent code and will open traces when a run surprises them.
Read the LangSmith page