Students
Reflux Student
Aspen Plus on your own licence, one seat, free to start. Ask what is wrong, fix it, and rerun with every number read back from Aspen.
See Reflux Student
New
Reflux Student. Free to start, no card, on your own Aspen Plus licence.
AI agents for simulation work
Reflux drives the simulators engineers already run. Ask for a change in plain English, see the plan before anything is written, and get every number read back from the simulator itself.
Free to start, no card. Windows 10 or 11 with Aspen Plus V14. Teams and other simulators: get a demo.
Built for the software engineers already run
- Aspen Plus
- HYSYS
- DWSIM
- Pro/II
- UniSim
- Petro-SIM
- CHEMCAD
- gPROMS
- COMSOL
- MATLAB
- Excel
Aspen Plus is available today. Every other package gets its own adapter, built against its published automation interface. Tell us which one you run →
One agent, four ways to run it
The same Reflux underneath. Pick the edition that fits how you work, start today, and move up when you need to.
Instructors and labs
Reflux for Academics
Three levels, set per course. Convergence failures stay failures, assumptions are logged, and the submitted file is never written over.
See the levels
Process engineers
Reflux for Engineers
Inspect, edit, run and explain the cases you already have through a reviewed workflow. The native model stays the source of truth and you keep the audit trail.
See it on a real case
Simulation software vendors
Reflux for Vendors
Give your package a natural-language front end without building an AI team. Embed it, co-sell it or refer it.
See how adapters workFrom a sentence to a verified result
No scripting, no macros. The plan is shown before anything is touched, and nothing is reported as done until it has been read back.
- Connect
Install Reflux beside your simulator. Sign in with an emailed link, then point it at a case or describe what to build.
- Ask
Say what you want in plain English: build a train, change a spec, find out why the last run failed.
- Review
Reflux shows the plan before it writes a thing. Every assumption it makes is logged at the moment it makes it.
- Run and verify
Each write is read back from the simulator before Reflux reports it. Results arrive with the run they came from.
The complete toolkit for trusted simulation work
Everything an engineer needs to hand a case to an agent and still sign their name to the result.
01
Reviewed plans show what Reflux intends to do, and the evidence it will bring back, before it starts.
02
Verified writes are read back from the simulator. Reflux never reports a change that did not land.
03
Run evidence travels with every number: warnings, specs, convergence and the case it came from.
04
Adapters connect one package at a time through its own automation interface. Aspen Plus first.
05
CLI and MCP server let you drive Reflux from a terminal, or from the agents your team already runs.
06
Instructor controls set explain-only, guided or full copilot per course, enforced at the tool layer.
Runs where your simulator runs
Reflux is independent software that drives a licensed, installed seat. It does not include the simulator and it does not replace it.
- >_Desktop, beside Aspen Plus
Windows 10 or 11. Installs in a minute and drives your own Aspen Plus V14 licence.
- $Terminal
The Reflux CLI for scripted studies, batch runs and anything you would rather not click through.
- ⇆Your own agents
An MCP server, so the agents your team already uses can reach the simulator through Reflux.
- ▣Your machine, your cloud, or on site
Start on one computer. Teams that need it run Reflux in a private cloud or fully on site.
Custom models
Want a custom model?
Reflux trains models on your process: converged cases, plant history and lab results. Predict what a case will do before it runs, and keep the model where your data lives.
What leaves your machine, and what never does
Plainly, because the answer is different on the free seat and on a team deployment.
Your files stay on your machine
The simulator, your case files and the automation all run locally, against your own licensed seat. Reflux never uploads a flowsheet.
What you type goes to a hosted model
On the free and student seats, your requests and the parts of a case Reflux reads go through Reflux's servers to Anthropic's API to get an answer. Reflux keeps usage counts, not your content.
Not used to train anything
Neither Reflux nor Anthropic trains on it, under Reflux's commercial API agreement. A model trained on your data is something you commission, and it stays yours.
Original files stay original
Work saves to a new file next to yours. The case you opened is never written over.
Teams choose where the model runs
Private cloud or fully on site, with an open-weight model inside your network for data that cannot leave it.
Read back, not assumed
Every write is checked against the simulator before Reflux says it happened. Every assumption goes into the log the moment it is made.
Try Reflux free.
Install it beside Aspen Plus and hand it the case you are stuck on. No card, no call.
One seat installs in a minute on Windows and drives your own Aspen Plus V14. Teams, courses, vendors and other simulators: get a demo.