WeWork

Sierra

WeWork

WeWork's model was fundamentally a real estate arbitrage play dressed up as a tech company. They signed long-term leases on buildings (often 10-15 years), spent millions renovating them, then rented desks and offices to members on month-to-month or annual contracts.

The spread between what they paid landlords and what members paid was supposed to be the profit.

The problem was the mismatch. Long-term obligations on the lease side, short-term flexibility on the revenue side.

In good times, buildings are full and the spread is healthy. In bad times — say, a global pandemic that empties offices — you're locked into paying rent on empty buildings while members cancel month-to-month.

Neumann tried to juice margins with ancillary services: WeWork Labs for startups, Powered by We for enterprise buildouts, and WeWork's own internal ventures. The company also launched WeLive (apartment living) and WeGrow (a private elementary school run by Neumann's wife).

These distractions drained cash without generating meaningful revenue.

Sierra

Companies pay Sierra to run their customer service with AI agents instead of hiring rooms full of humans. The agent talks to your customers over chat.

It answers questions. It processes returns.

It updates subscriptions. Here is the clever part.

Sierra charges based on outcomes, not seats. Brands pay when the AI actually resolves a problem, not just for having the software installed.

That pricing is unusual. Most software charges a flat monthly fee no matter what.

Sierra only gets paid when the bot does the job.

WeWork

Adam Neumann was a 6'5" Israeli former naval officer with a talent for fundraising that bordered on hypnosis. Miguel McKelvey was an architect from Oregon with hippie parents who raised him in a commune.

Together in 2010, they launched WeWork from a single building in SoHo, New York — though they actually started with a predecessor called Green Desk in 2008, which was a sustainable coworking space in Brooklyn that they sold to their landlord.

The original concept was dead simple: lease entire floors of commercial buildings at bulk rates, renovate them with trendy design — exposed brick, beer on tap, inspirational quotes on the walls — then sublease individual desks and offices at a premium. The "community" angle was the differentiator.

WeWork wasn't just selling desks. It was selling belonging, networking, the feeling of being a startup founder even if you were a freelance graphic designer working alone.

The timing was perfect. After the 2008 recession, commercial real estate was cheap and available.

The gig economy was exploding. Millennials were entering the workforce with different expectations about work environments.

And startups that couldn't afford traditional office leases needed flexible space. WeWork grew from 1 location to 5 within two years, and the waitlists were long.

Sierra

Bret Taylor had already done the impossible twice. He co-created Google Maps.

He later became co-CEO of Salesforce, chaired Twitter's board during the messy Elon Musk takeover, and became chairman of OpenAI in late 2023. Clay Bavor spent 18 years at Google, most recently running its Labs group.

The two friends left their big jobs in 2023 to build something together. They picked customer service on purpose.

It is the least glamorous corner of software. Their logic was simple.

Companies hate their support costs. Customers hate waiting on hold.

AI that actually resolves problems could fix both sides at once. They launched Sierra in February 2024 with $110 million from Sequoia and Benchmark.

WeWork

WeWork grew through sheer aggression funded by seemingly unlimited capital. They would enter a city, sign leases on multiple buildings simultaneously, renovate at premium cost, and absorb losses until locations filled.

The playbook was Uber-style: spend aggressively, dominate the market, worry about profitability later.

The "community" brand was powerful marketing. WeWork events, networking mixers, and the overall vibe attracted a loyal member base that became free ambassadors.

Instagram photos of beautiful WeWork interiors drove organic demand.

Enterprise was the real growth engine. By 2019, over 40% of members were from companies with 500+ employees.

Microsoft, Amazon, and Salesforce all had teams in WeWork. Enterprise clients signed longer contracts and were more predictable than freelancers, but WeWork still spent far more acquiring and building out space than it earned from these relationships.

Sierra

Sierra went straight for big brands, not tiny startups. SoFi, Ramp, ADT, Sonos and Brex signed up early.

By 2026 it said more than 40% of the Fortune 50 were customers. The trick was trust.

Enterprises are terrified of an AI bot going rogue and insulting a customer. So Sierra built guardrails and let each company control exactly how the agent behaves.

Bret Taylor's contacts did the rest. When the chairman of OpenAI calls a Fortune 500 CEO, they pick up.

Sierra hit $100 million in annual recurring revenue in November 2025, seven quarters after launch, and $150 million by February 2026. In April 2026 it launched Ghostwriter, which builds and deploys a new agent from a plain-English description.

WeWork

Where to begin? The S-1 filing in August 2019 was a masterclass in red flags.

It revealed that WeWork lost $1.9 billion in 2018 on $1.8 billion in revenue — spending more than a dollar for every dollar earned. Neumann had taken $700 million off the table through stock sales and loans before the IPO.

He owned the "We" trademark personally and charged the company $5.9 million to license it. He had family members on payroll.

He flew on a private jet funded by the company.

The planned $47 billion IPO was pulled in September 2019 after investors revolted. The valuation was slashed.

Neumann was forced out and given a $1.7 billion exit package — for nearly destroying the company. SoftBank took control, cut thousands of jobs, and spent years trying to restructure.

WeWork finally went public via SPAC in 2021 at a $9 billion valuation.

Then COVID hit the commercial real estate market like a meteor. Remote work became permanent for many companies.

WeWork's occupancy plummeted. They filed for Chapter 11 bankruptcy in November 2023, listing $18.7 billion in debt, wiped out the equity, shed hundreds of leases and came back out in June 2024 as a far smaller private company.

The cautionary tale was complete.

Sierra

Everyone is building AI customer service agents right now. Decagon has raised at a multi-billion valuation.

Salesforce, ServiceNow and Intercom all shipped their own agents. Sierra is not the cheap option.

It sells premium AI to giant companies that move slowly. The bigger risk sits underneath the product.

Sierra does not make its own AI models. It rents them from providers like OpenAI and Anthropic.

If those model makers decide to compete directly, Sierra's edge gets thin fast, and its co-founder chairing one of them only makes that question louder. A $15.8 billion valuation on roughly $150 million in revenue leaves almost no room for a stumble.

WeWork

WeWork All Access — a membership that gives access to any WeWork location worldwide, targeting remote workers and traveling professionals. Dedicated Desks — assigned workstations in shared open-plan spaces for individuals and freelancers.

Private Offices — enclosed offices for teams, the bread-and-butter product generating most revenue. WeWork Workplace — enterprise software for managing hybrid work, office scheduling, and space utilization analytics.

On Demand — pay-by-the-day access to meeting rooms and workspace without a monthly commitment.

Sierra

The core product is the Sierra AI agent. It is a branded customer service bot that companies deploy on their website, app, and phone lines.

It handles the boring stuff. Order tracking.

Refunds. Password resets.

Account changes. Sierra also built its own tools to test and monitor these agents so they do not make things up.

In 2024 the company added a voice version that talks to customers on the phone. In April 2026 it added Ghostwriter, a tool that builds and deploys a new agent from a plain-English description.

The whole pitch is one AI agent that carries your brand's name and never sleeps.

WeWork

SoftBank Vision Fund was the largest and most consequential investor, pouring over $10 billion into WeWork across multiple rounds. Masayoshi Son reportedly agreed to invest after a 12-minute meeting with Neumann.

Benchmark was an early investor. JPMorgan Chase provided debt financing.

T. Rowe Price, Fidelity, and Goldman Sachs participated in later rounds.

The company raised more money than most companies ever generate in revenue.

Sierra

Sequoia Capital and Benchmark wrote the first checks at launch in February 2024, $110 million between them. Greenoaks Capital then led both the $175 million round in 2024 and the $350 million round in September 2025.

In May 2026 Tiger Global and Google's GV led a $950 million round at a $15.8 billion valuation, with Benchmark, Sequoia and Greenoaks back in. That takes total funding to about $1.6 billion.

That is partly the product and partly Bret Taylor. Investors bet on founders who have already built billion-dollar things.