Features Comparison

Only a comparison with assets that have (or used to have) a comparison table with FlowCanvas is shown here.
( For your information, FlowCanvas was released before Bolt / Unity VS )

Graph Modules

FlowCanvas

Bolt / Unity VS

Flow Graphs

State Machines

Code Integration

FlowCanvas

Bolt / Unity VS

Fields, Properties and Methods

Constructors and Extractors

Generic Methods

C# and Unity Events

Delegates

Params Array Exposition

Nesting

FlowCanvas

Bolt / Unity VS

Macros And SubGraphs

Auto-Convert Nodes To Macro

Asset SubGraphs

Bound SubGraphs

SubGraph Variables Mapping

Workflow

FlowCanvas

Bolt / Unity VS

Visual Debugging

Predictive Analysis

Breakpoints & Frame Stepping

Graph Minimap

Graph Console

Graph Explorer

Graph Refactor

Canvas Groups

Node Browser

Built-In Documentation

Full, Partial, Compact Display Modes

Connections Enable/Disable

Workflow

FlowCanvas

Bolt / Unity VS

Custom Local Functions

Auto-Convert Data Types

Generic Wild Ports

Multi-Targeted Object Events

Native Tweening Nodes

Variables

FlowCanvas

Bolt / Unity VS

Graph Variables

Object Variables

Global Variables

Blackboard Variables Parenting

Auto Saved Variables

Property Bound Variables

Prefab Overridable Variables

Safe Variable Renaming

All Types Supported

Performance

FlowCanvas

Bolt / Unity VS

Highly Optimized Reflection For JIT

Strongly Typed Connections

Async Graph Loading

Scripting

FlowCanvas

Bolt / Unity VS

All Platforms Supported

Extensible API for Custom Nodes

Source Code