If you're evaluating automation vendors in 2026, you're drowning in overlapping labels. Let's untangle them.
Workflows
Deterministic chains. If this, then that. A Zapier automation. A webhook-to-webhook pipe. Perfect for well-defined, repeatable tasks where the inputs and outputs are stable.
- Fast.
- Cheap.
- Breaks when the shape of the input changes.
RPA
Robotic Process Automation. Deterministic, but at the UI layer instead of the API layer. A bot that clicks buttons in an ERP because there's no API. 2005 technology still making money in 2026.
- Works when you have no API.
- Costs a fortune to maintain.
- Shatters on any UI change.
Agents
Probabilistic. Goal-directed. Observe → plan → act. Uses LLMs for the planning step so the path adapts to context.
- Handles ambiguity.
- Costs more per run.
- Needs guardrails and observability.
Which should you use?
- Fixed, high-volume, well-defined: workflow.
- Legacy system with no API, low-volume: RPA. Reluctantly.
- Variable input, cross-system, judgment-required: agent.
Most operational work is the third category. That's why we built Arthat.