Accel led the round, with existing investors Bessemer Venture Partners and Lightspeed Venture Partners also participating, the company said on Tuesday.
The AI platform helps e-commerce sellers scale their businesses and secured the funding just two months after emerging from stealth.
Zyg was founded by IronSource's founders and had announced $58 million in seed funding in March, underscoring rapid investor backing.
With a $500M valuation, can Zyg's platform truly outperform human experts across thousands of unique brands?
Zyg's pay-as-you-grow model promises alignment, but could the AI prioritize revenue over long-term brand health?
As one AI system manages entire brands, what happens when it makes a catastrophic, business-ending mistake?