NexArb Blog

Arbitrage, AI, and sourcing.

Behind-the-scenes stories, strategy guides, and what we're building at NexArb.

Behind the BuildAugust 2026· 8 min readFeatured

How I Built an AI Arbitrage Engine That Scans 14,000 Products Daily

The story behind ArbitrAI — the engine powering NexArb — from the first Python script to a production system processing thousands of deals per day.

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StrategyAugust 2026· 11 min read

Amazon vs Walmart Arbitrage in 2026: The Complete Guide

Everything you need to know about retail arbitrage between Amazon and Walmart — how FBA and WFS fees differ, how to calculate real margins, and what to look for in 2026.

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SourcingAugust 2026· 9 min read

When Amazon Gates You Out: How to Use Alibaba for Private Label Sourcing

Getting gated out of a profitable Amazon category isn't the end — it's the start of a better business. Here's how to use Alibaba to source equivalent products under your own brand.

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