What exactly was Knock's home trade-in product?

Knock would use its own capital to make a guaranteed cash offer for the client's new home, allow the client to move into the new home and take time to prepare their existing home for sale, then use the existing home's sale proceeds to pay off the bridge funding. The client avoided the stress of coordinating two simultaneous transactions and could take time to clean, stage, and optimise their existing home for sale.

Why was the lock-in effect specifically problematic for Knock?

Knock's target customer was the trade-up buyer — someone selling a good home to buy a better one. The lock-in effect froze exactly this customer: people with low-rate mortgages who would need to finance their new purchase at current rates faced mortgage payments 50-70% higher on the same loan amount. The effective cost of trading up became prohibitive, eliminating most of Knock's addressable market.

How was Knock different from other power buyers that also failed?

Knock's differentiation was focusing on the existing-homeowner trade-up scenario rather than the first-time or non-owner buyer scenario. This gave it better client quality (equity-rich homeowners) but created equal rate sensitivity. The Trulia pedigree gave it strong industry relationships. The business problem was the same as its competitors: the 2022 rate environment eliminated the market.

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// HALL OF FLAME · STARTUP AUTOPSY

Founded	2015
Closed	2022
Country	USA
Sector	Proptech
Total raised	~$400M (Foundry Group, RRE Ventures, Greycroft Partners)
Collapse type	Silent Shutdown
Founder	Sean Black, Jamie Glenn

Knock

"The home trade-in platform that raised $220M to help people buy before they sell — undone by the same rate shock that killed its competitors"

$220M

RAISED

—

EMPLOYEES

MONTHS

timingSilent Shutdown

Quiet closure with no public announcement

// Fatal mistake: The mortgage lock-in effect of 2022 — homeowners unwilling to trade a 3% mortgage for a 7% one — eliminated the pool of trade-up buyers regardless of Knock's product quality, making the core business proposition structurally nonviable at high rates.

Key Events Timeline

2015-01

FOUNDING

Knock founded

2019-06

LAYOFF

Market downturn forces cuts

2021-09

FUNDING

Knock raises ~$220M in latest round, bringing total to ~$400M; implied valuation approaches $3B; Home Swap model operating in multiple US markets at scale.

2022-03

DOWN ROUND

Federal Reserve begins rate hiking cycle; 30-year mortgage rates begin climbing from 3.2% toward historic highs; Knock's bridge loan carry cost increases with each successive hike.

2022-12

SHUTDOWN

Knock announces shutdown of Home Swap program on December 15, 2022; majority of ~400 employees laid off; company pivots to software product for real estate agents — a fundamentally different and smaller business.

2023-06

SHUTDOWN

Silent Shutdown: Knock ceases operations

🔥 Hall of Flame 38%🏆 Hall of Fame 40%

Knock was founded in 2015 by former Trulia executives Sean Black and Jamie Glenn with a differentiated take on the power buyer concept: instead of making cash offers for buyers purchasing homes in the open market, Knock focused specifically on the "trade-up" scenario — homeowners who wanted to buy a new home before selling their existing one.

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More Proptech →More from USA →More timing failures →Raised: ~$400M (Foundry Group, RRE Ventures, Greycroft Partners)

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// THE PROPTECH GRAVEYARD DOESN'T END HERE

Knock followed a documented pattern. Identify the same signals in any company before they reach the point of no return.

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