See the impact of process change before you commit to it.
ArkSim is a light, rapid process simulator for analysts and architects. Model automation, AI agents, new controls and quality improvements — and watch the cost and time impact play out in minutes. Right-sized for everyday business processes, at a fraction of the cost.
Illustrative visualisation — not actual app output.
“What happens if we automate this step?” deserves a better answer than a hunch.
The specialist simulation platforms can answer it beautifully — but they’re built for complex, industrial modelling and the teams who do it full time. For an everyday finance, HR or marketing process, that’s more firepower than the question needs, so most teams fall back on a spreadsheet and an average. Averages hide the queues, the rework and the variability that decide whether a change actually pays off. ArkSim gives you a real discrete-event simulation with a learning curve you can clear over a coffee.
From a blank canvas to a defensible number
Three steps. No specialist training, no scripting language.
Map the process
Add steps, connect them, and mark the decisions, controls and rework loops. Start from the built-in sample and edit, or build from a blank canvas.
Set the numbers
Durations, volumes, who (or what) does each step, and where you want to introduce automation or agents. Sensible defaults mean you can move fast.
Run & compare
Watch work flow through in real time, then read off the baseline-vs-target cost and time. Change one assumption, run again, and defend the number.
See ArkSim in action
Six steps from raw inputs to a defensible business case.
Turn any input into a simulation
Use your own AI to convert workshop flipcharts, spreadsheets or photos into a working model — with the structured prompts we provide.
Adjust from the baseline
Pull levers — simplification, centralisation, automation, agents — and watch each one reshape the model.
Auto-visualise your process
Lay the whole process out in seconds with a range of auto-draw functions.
Simulate the process
Live demoWatch work flow through in real time — resources, queues and rework included.
Review the results
Read off throughput, cost and time, baseline against target.
Export the results
Send output to Excel or JSON for reporting and sign-off.
A real simulation engine, minus the complexity
Everything you need to model the messy reality of a process — and nothing you don't.
Model any process as a flow
Lay out steps, decisions, controls and endpoints as a graph. Work items flow through as discrete events — exactly how the work really happens.
Test automation & agents
Swap a human step for a deterministic script or an AI agent, fixed-capacity or unlimited. See what actually shifts — throughput, cost, and where the queue moves next.
Baseline vs target economics
Every run prices itself. Human cost, agent cost and per-run AI spend, baseline against target — so the business case is in the tool, not a separate spreadsheet.
Resources & queues
Give steps real capacity. When demand outstrips it, items queue — so bottlenecks surface before they hit your customers.
Rework, branches & variability
Probabilistic branches, rework loops, and durations drawn from fixed, triangular, uniform or normal distributions. Model the messy reality, not a tidy average.
Batch workloads at any scale
One quarter-end report or a full day's worth of invoices. Set an arrival rate and watch a month of work compress into a few minutes of playback.
Right-sized simulation for everyday business processes
There are well-established specialist simulation platforms on the market (we won't name them) — they're superb, powerful, and can model highly complex systems. ArkSim is a much simpler, lighter option that still lets you capture many of the processes a company runs — especially service industries and non-physical, office-based processes.
 ArkSim | Specialist platforms | |
|---|---|---|
| Best for | Everyday business processes — finance, HR, marketing, operations | Complex physical & industrial systems — airports, factories, logistics |
| Modelling depth | The essentials, focused and fast | Deep, richly detailed, endlessly configurable |
| Learning curve | About 30 minutes | A specialist toolset, worth the investment |
| Setup | Lightweight desktop app | A full simulation studio |
| Access | Beta — open to feedback | Premium licences (≈£2,000–8,000) |
Modelling an airport, a factory floor or a national supply chain? Those platforms are exactly what you want. For an everyday finance, HR or marketing process, ArkSim gets you a credible answer in an afternoon.
Coming soon: chat with your process
Building from a process map, a spreadsheet or workshop output already works today. Next up: shaping a model just by describing it.
Chat with your process
Describe the process — or the change you’re weighing up — in plain language, and let ArkSim build and adjust the model with you. No forms, no fiddly data entry: a conversation that ends in a running simulation.
Got an idea for the roadmap? We’d love to hear it.
Get in touchFor business analysts
Turn a process map into evidence. Show the ops team where the queue forms, quantify the rework, and put a credible number on the improvement you’re proposing — without waiting on a simulation specialist.
For architects
Prove the target-state design before anyone builds it. Pressure-test your automation and agentic options, compare designs on cost and time, and hand over a blueprint backed by numbers — not just a diagram.
Download ArkSim for desktop
The same simulator as a native desktop app — works offline, launches from your dock or taskbar. In beta — open to your feedback.
Version 0.1.1 · Beta · macOS & Windows
In beta — open to your feedback
Use ArkSim on real work today, and help shape where it goes next.
- The full discrete-event simulation engine
- Baseline vs target cost & time on every run
- Automation, AI-agent and rework modelling
- Batch workloads at scale
- Works offline on your own machine
Talk to us
Questions, feedback, or an idea for the roadmap? Send us a note and we'll get back to you.