Try Sensier: causal maps, impact maps and causal loop diagrams

This example asks whether a subscription business should raise its price. Amber boxes are the levers you control, blue boxes are the effects in between, green boxes are the outcomes you care about, and rose boxes are outside forces.

Links show whether a change pushes the next box up (+) or down (−). Thicker means a bigger effect, and dashed means less certain. Two loops are hidden in the map: word of mouth grows the customer base, while support load holds it back.