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Web Lab

software

Last discussed Oct 28, 2026

Amazon's internal A/B testing system, which runs thousands of concurrent experiments.

Recently discussed in

Ex-Amazon VP reveals what it's really like working with Jeff Bezos

Ethan Evans · Oct 28, 2026

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Ethan Evans

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Used for: A/B testing Amazon website changes Praised: Runs thousands of concurrent experiments and isolates each one's results

"Everything at Amazon is A/B tested and the winner is what drives up sales. It's a program called Web Lab, and you run a Web Lab, and they have a complicated system so that thousands of competing experiments can be running at the same time."

Ex-Amazon VP reveals what it's really like working with J... · ▶ 52:01 · Oct 28, 2026

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Internal tools topic · 23 products Ab testing topic · 10 products

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internal tools ab testing experimentation

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