NeMo Helix vs LangGraph
NVIDIA NeMo Helix vs LangGraph, Dify and n8n: what each is for
They are not alternatives to each other. LangGraph is a code library for writing agents as graphs. Dify and n8n are visual tools for building AI applications and workflows. NVIDIA NeMo Helix does not build agents at all: it evaluates, fine-tunes and improves agents built with something else, and has no visual builder. Most teams will use one tool to build and may add Helix to measure and improve what they built.
Side by side
| NeMo Helix | LangGraph | Dify | n8n | |
|---|---|---|---|---|
| What it is | A control plane with a web UI for evaluating and improving agents | A code library for agents as graphs | A visual builder for AI applications | A visual workflow automation tool with AI steps |
| How you build an agent | You do not. You register one built elsewhere | In Python or JavaScript code | On a canvas and in forms | On a canvas of connected steps |
| Who it suits | Engineers improving agents | Developers | Product teams and developers | Operations and automation teams |
| Evaluation | Core feature: experiments, metrics, traces | Through companion tools | Basic | Basic |
| Fine-tuning models | Yes, three training backends | No | No | No |
| Licence | Open source, Apache 2.0 | Open source | Open source with conditions | Source available with conditions |
The Helix column is from our hands-on test in November 2026. The other three columns are a general description of each product. Check each project's own site for its current licence and features.
How they combine
- Write the agent in LangGraph, run it through NeMo Fabric with an adapter, record it with NeMo Relay, and measure it in NeMo Helix.
- Helix's sample agent is built on Deep Agents, which is part of the LangChain family. Helix and LangGraph are designed to meet.
- Dify and n8n are complete tools in themselves. To measure their agents in Helix you would need an adapter or an endpoint Helix can call.
How to choose
- You want to write an agent in code: LangGraph.
- You want to build an AI application without much code: Dify.
- You want to automate business steps that include some AI: n8n.
- You already have agents and want to score them, compare models and fine-tune: NeMo Helix.
- You want all teams in an organisation to build, govern and run agents in one place: that is a platform, the next section.
What none of the four is
None of them is a governed platform for a whole organisation: many teams, access control, budgets per team, audit and a private deployment under your control. Each solves one part.
Where Katonic fits
Katonic is that platform. Teams build agents visually, from templates, in code or from a description, and every agent is a declarative definition that compiles to NVIDIA's open agent software. Governance, tenancy and cost control sit around them. Helix can then measure and improve the same agents.
Read next
- What is NVIDIA NeMo Helix? →
- NeMo Helix for enterprise: what it does and does not do →
- NeMo Agent Toolkit vs LangGraph, CrewAI and LangChain →
- NVIDIA NeMo Helix, Relay and Fabric: field guide →
- NeMo Helix on GitHub →
Questions and answers
Is NVIDIA NeMo Helix an alternative to LangGraph?
No. LangGraph is a library for writing agents. NeMo Helix evaluates and improves agents built with something else. They are meant to be used together.
Is NeMo Helix an alternative to Dify or n8n?
No. Dify and n8n are visual builders. NeMo Helix has no visual builder and does not build agents.
Does NeMo Helix have a drag-and-drop builder?
No. Agents are configuration files registered from the command line or by a coding assistant.
Can I use LangGraph agents with NeMo Helix?
Yes, through NeMo Fabric with an adapter. Helix's own sample agent is built on Deep Agents from the LangChain family.
Which of these can fine-tune a model?
Of the four, only NeMo Helix, through NeMo Studio.
Which should an enterprise choose?
It depends on the job. For one place where many teams build, govern and run agents, look at a platform. For measuring and improving agents, look at NeMo Helix.