01 / COMPARISON
LangGraph is the orchestration layer of the LangChain ecosystem: a low-level framework for stateful agent graphs in Python and JavaScript. IronCrew is a native runtime you operate. The differences below are structural, checked against LangChain's public documentation, and dated — if a claim drifts, it is a bug.
VERIFICATION
CLAIMS CHECKED AGAINST LANGGRAPH'S PUBLIC DOCUMENTATION ON 2026-08-15Report an outdated claim02 / THE HONEST SPLIT
Both columns are meant sincerely. If the left column fits your situation, use it — the wrong tool adopted for loyalty costs more than either framework.
You want fine-grained, low-level control of agent state graphs inside your Python or JavaScript application. [1]
Your stack already leans on LangChain integrations and LangSmith observability. [1]
You want managed scale: LangSmith Deployment operates long-running, stateful agents for you. [2]
Durable execution through checkpointers is a first-class, well-documented pattern you want to build on. [1][4]
A security review will ask for SBOMs, signatures, and a signed container path.
Production hosts must not carry a Python or Node runtime; you deploy one native binary.
Human approval must be a fail-closed runtime contract with encrypted, attributed delivery.
Runs must survive restarts and coordinate across replicas on PostgreSQL, in the open core.
Prompts must be able to stay on-prem with a local model via Ollama.
03 / STRUCTURAL DIMENSIONS
Descriptive cells, not checkmarks. Every claim about the other side carries a numbered citation into the sources below; IronCrew's claims keep their usual evidence links.
| Dimension | LangGraph | IronCrew |
|---|---|---|
| Deployment model | Library inside your application; production deployment is LangSmith Deployment — managed cloud on a Plus plan and above, self-hosted control plane on Enterprise, standalone server with your own PostgreSQL, Redis, and a LangSmith license. [2] | One binary you operate anywhere; multi-replica coordination needs only PostgreSQL. |
| Runtime dependencies | Python >=3.10, or the JavaScript variant in Node. [1][3] | None beyond the binary; PostgreSQL only when durable coordination is needed. |
| Workflow definition | Graphs written in Python or JavaScript application code. [1] | Crews of role-defined specialist agents in readable Lua, executed by a Rust runtime. |
| Human-in-the-loop | interrupt() pauses the graph; a human resumes with Command(resume=...); requires a checkpointer and a stable thread_id. [4] | Named agents raise attributed questions over CLI, HTTP, and SSE; answers deliver encrypted across replicas. |
| Approval of tool use | Composed from the same interrupt primitive by your application code. [4] | A separate, fail-closed approval boundary with redacted arguments, distinct from questions. |
| Durability & replicas | Durable execution via checkpointers that persist graph state, including Postgres backends. [1][4] | A documented multi-replica contract: durable ownership, replay, encrypted HITL delivery, graceful drain. |
| Release provenance | PyPI Trusted Publishing with artifact hashes; no SBOM or signature documentation on the release page as of the stamp date. [3] | Checksums, keyless signatures, CycloneDX SBOM, and a signed OCI path per release. |
| License & commercial pull | MIT library; the deployment platform's tiers, including self-hosted, require a LangSmith plan or license. [2][3] | MIT with no hosted edition; commercial work is direct maintainer services. |
| Process/judgment separation | One graph framework carries deterministic process and agent reasoning together in your application. [1] | Judgment (IronCrew) and deterministic process (IronFlow) are separate governed runtimes. |
04 / SEPARATED RUNTIMES
Library frameworks carry deterministic process and agent reasoning together inside your application. The Iron stack separates them: IronFlow runs the process, IronCrew handles the judgment, and a governed boundary sits between proposal and execution.
05 / SOURCES
Verified on 2026-08-15. These are the documents the claims above were checked against; the stamp is part of the page's contract.
MAKE THE CALL WITH EVIDENCE