How Marc Lore built diapers.com, sold to Amazon, and then took on Amazon with Jet.com

Executive overview

Selling diapers online is structurally impossible to make profitable — they're a loss leader even in stores, and shipping costs compound the losses. Marc Lore bet that diapers would drive traffic, and that unlimited online shelf space would let him make money on everything else in the basket.

Amazon noticed, slashed diaper prices 30%, and forced a $550M acquisition by threatening to take prices to zero. Three years later, Lore left and raised $750M to build Jet.com — a real-time smart-pricing engine designed to reward customers for building efficient baskets. Walmart acquired it for $3.3B in 2016.

When you can't raise enough to outlast a competitor, the only way to win is to make the supply chain itself cheaper than theirs.

From banking to baseball cards to bobsledding

• Left a half-million-dollar-a-year banking career at 28 to start a sports stock-market called The Pit
• The Pit hit $10M in transaction revenue in 10 months before the dot-com crash cut off funding
• Sold to Topps for $5.7M — enough for all investors to get their money back with a small return
• Qualified for the 1998 US national bobsled team after pushing the sled fastest at a World Financial Center promotional event; declined to pursue it full-time to keep earning
• Drive traced to childhood: the only way to get his father's attention was to do something extraordinary

The diapers.com thesis

• Searched Google keyword volumes looking for opportunity; "diapers" returned 200,000 searches a month with no viable online seller
• Core insight: diapers are a loss leader because retailers race each other to the bottom to drive store traffic — online, you could use that same loss to drive traffic, then sell high-margin products in the same box
• Procter & Gamble and Kimberly-Clark refused to supply them; founders bought pallets from BJ's, Sam's Club, and Costco at full retail price
• Sold diapers below cost, absorbed shipping — the more revenue they made, the more money they lost
• Reached $11M in revenue with two to three people before raising outside capital

Making the economics work

• Hired a PhD physicist from his banking days to solve packaging efficiency
• Built "Boxum": an algorithm that matched every order to the optimal box size from 20–30 options, minimising dead air
• Key insight: once a box is going out the door, adding a pound of product costs roughly 10 cents in incremental shipping — the marginal economics on add-ons are strong
• Forced P&G and Kimberly-Clark to sell directly by clearing wholesale clubs of all stock, prompting club managers to call the manufacturers' reps
• Expanded to wag.com (pets), soap.com (household), beautybar.com (cosmetics), yo-yo.com (toys), casa.com (home) — all sharing one shopping cart under the Quincy corporate umbrella
• By end of 2010: ~$300M revenue, ~300 employees, a visible path to profitability

The Amazon acquisition

• Amazon approached about acquisition in 2009; months later cut diaper prices 30% — unprecedented for an already-loss-leader product
• Went to raise $100M to fight back; investors refused because Amazon was targeting them
• Met Amazon in Seattle in September 2010; Amazon revealed Amazon Mom, which would undercut diapers.com pricing by ~$15 per case
• Received a competing offer $100M higher than Amazon's; Amazon explicitly threatened to "bury" them if they accepted it
• Sold to Amazon for $550M — all investors made strong returns, but Lore and co-founder Vinnie Bharara were depressed, not celebratory
• Amazon kept Quincy running independently rather than folding it into their baby category; Lore stayed three years before leaving

Building Jet.com

• Core idea: a real-time pricing engine that showed customers lower prices for adding items that shipped from the same warehouse — passing supply-chain savings directly to the buyer
• Launched with a $50/year Costco-style membership model; dropped it three months in after investors flagged retention uncertainty
• Raised $750M total; Series A alone was $618M raised against negative gross margins while competing with Amazon
• Planned to lose $3B before reaching profitability — a figure disclosed to investors upfront
• Reached $1B annualised revenue run rate within 10 months of launch
• Sold to Walmart for $3.3B in 2016 — the largest US e-commerce acquisition at the time — after a whiteboard conversation with CEO Doug McMillon aligned on a shared vision

Running e-commerce at Walmart

• Moved Jet's people, technology, and fulfilment centres onto Walmart.com rather than running two mass-market sites in parallel
• Acquired Bonobos (2017) deliberately to change the talent narrative — making Walmart credible to engineers and operators who would not have considered it before
• Introduced salary transparency and pay parity at the same level across Jet to reduce unconscious bias
• Left after four and a half years; assessed outcomes: changed the narrative, accelerated top-line sales, launched an internal startup incubator

On capital, competition, and mindset

• Invested every dollar he had ($390K) in The Pit to unlock angel investment — "if I didn't do that, I wouldn't have got the investment dollars"
• Advocates raising as much as possible from the best investors: "the more you're able to let go and trust, the less work you do"
• Describes a "sixth gear" — a state only accessible when your life is on the line — distinct from ordinary hard work
• Transition from "mercenary" (money-driven) to "missionary" (purpose-driven) happened during the diapers.com years; attributes later decision-making quality to that shift
• "Values created the value" — the cultural infrastructure at each company was what made the financial outcomes possible