The fundamental difference
Instawork is a marketplace. ShiftSee is a relationship platform.
This is the core structural difference.
Instawork solves "I need anyone qualified, right now." They show you a pool of vetted strangers. First qualified worker to claim your shift gets it. It's fast, it works for enterprise, and it's useful when you don't have time to build relationships.
ShiftSee solves "I need someone I trust, and I want to build a crew over time." Every shifter you work with becomes part of your connected crew. Their rating, history, and preference patterns become visible to you. Over six months, you're not hiring strangers — you're scheduling people who know your kitchen, your menu, your customers.
Both models work. They serve different customers.