SmartDraw is a general diagramming app with patent drawing templates; PatentFig AI is purpose-built patent software with AI generation and compliance checking. The right choice depends on how much manual control you want.

Template-based manual drawing versus patent-native AI generation.
A broad template library — including patent drawing templates — where you construct each figure by hand with full control.
Start from a photo, sketch, screenshot, or text description; get compliant line art and adjust it through chat.
SmartDraw leaves 37 CFR §1.84 — margins, line weights, numbering — entirely to you; PatentFig AI applies and checks the rules.
SmartDraw excels at flowcharts and schematic diagrams; mechanical line art, exploded views, and design view sets are PatentFig AI territory.
The hidden work SmartDraw users take on for each patent figure.
Every margin, line weight, and font size checked against office rules yourself — objections surface in office actions, not before filing.
Keeping part 12 as “12” in every view across ten figures is manual and error-prone without numeral management.
Perspective, exploded, and cross-section views of physical devices are slow to construct in a 2D diagramming canvas.
Each attorney markup means manual redrawing; with AI generation a chat instruction does the targeted edit.
Based on each product’s public materials as of 2026 — verify current features with the vendors.
Honest comparison
Turn a photo, sketch, or description into rule-checked patent line art with consistent reference numerals.