Four times a year, between 150 and 200 companies are told they have to be in San Francisco within weeks. Most of them have never rented here. Almost none of them want a twelve-month lease. This article is about what happens next.
The requirement that created the problem
Since the Winter 2025 batch, Y Combinator has required founders to relocate to San Francisco for the entire duration of the batch. There is no remote track. The program runs four batches a year — Winter, Spring, Summer and Fall, roughly January–March, April–June, July–September and October–December — at about 150 to 200 companies each. Winter 2026 had 199 companies; Spring 2026 had 193. The standard deal is unchanged: $125,000 for 7% on a post-money SAFE, plus $375,000 on an uncapped MFN SAFE, for $500,000 total.
Work the arithmetic on housing demand. Two to three founders per company, 190 companies, four cycles a year: somewhere in the region of four hundred to six hundred people arriving each quarter, needing roughly three months of housing, with a hard start date, often from another country, usually without US rental history.
Y Combinator is only the largest. HF0 brings in about ten teams a cohort for twelve weeks and houses them itself in its Alamo Square mansion. The Residency runs three-to-six-month cohorts across five leased San Francisco mansions — four in Pacific Heights, one in the Mission — at ten to twenty-five founders per house, with a waitlist of more than a hundred. Add fellowships, venture-studio cohorts, research programs and the corporate teams flying in for a quarter, and the batch-shaped housing problem is a permanent feature of the city, not a seasonal one.
What the market gives you
The market these founders land in is the tightest it has been.
| Measure | 2026 figure |
|---|---|
| Median 2-bedroom rent | $6,020/month, up 25.9% year over year — above $6,000 for the first time |
| Median 1-bedroom rent | $4,180/month, up 22.9% year over year |
| Average asking rent | around $3,860/month, roughly double the US average |
| Active listings | down about 30% year over year |
| Overall vacancy | about 3.6% |
| Vacancy in preferred areas (Marina, Pacific Heights, SoMa) | about 3%, down from roughly 13% in 2020 |
San Francisco two-bedroom rents have overtaken New York's. Bidding wars on rentals are routine. And the reason is not mysterious: AI hiring against a development pipeline that produced very little new inventory.
So the founder arriving for a three-month batch is competing for a scarce unit against someone who will sign for a year and stay.
Why the standard lease is the wrong instrument
Run the real cost of solving a three-month stay with a twelve-month lease on an unfurnished one-bedroom.
- Rent you do not use. At $4,180 a month, a twelve-month lease to cover a three-month batch is roughly $37,600 of rent for months you are not there, unless you can sublet — and subletting an unfurnished unit for short terms in San Francisco has its own legal and building-rule complications.
- Deposit and qualification. Expect a deposit plus first month up front, and an application that wants US credit history, US income and references. A founder who arrived from São Paulo or Bangalore three weeks ago has none of those.
- Furnishing. A bed, a desk, a chair, a sofa, kitchenware, linens. Several thousand dollars and a week of your batch spent assembling flat-pack furniture, then disposing of it.
- Setup. Electricity, gas, internet. Internet installation alone can take one to three weeks in some buildings — during a batch where the whole point is the next ninety days.
- Exit. Break fees, cleaning charges, or carrying the lease until it runs out.
A three-month stay solved with a year's lease is not a cost saving. It is a worse product at a higher price.
The four real options
1. The program houses you. HF0 and The Residency include housing. If you are in one of those, this is solved, and you should take it. The constraint is that they are tiny and selective.
2. A hotel or aparthotel. Workable for two weeks, ruinous for three months, and no kitchen means every meal is bought. It also fails the thing you came for: your team is in separate rooms on separate floors, not around one table.
3. Sublets found individually. The default, and the usual outcome is dispersion: a team of six in four neighbourhoods. You pay San Francisco prices and lose the co-location that justified moving here in the first place — the specific thing a 2023 Nature study found degrades breakthrough idea-formation when teams are split up.
4. Furnished month-to-month housing built for this. One monthly price, furnished, internet live on arrival, cleaning included, no twelve-month commitment, and — critically — enough rooms in one house that the team stays together.
What to actually check before you book
Having run this for founders repeatedly, these are the questions that determine whether a stay works. Ask them of us or of anyone else:
- Is the whole team in one building? If not, how far apart, walking?
- What is the actual upload speed, and is there a backup? Fundraising happens on video calls. This is not a nice-to-have.
- How many bathrooms per bed? The most common complaint in badly specified group housing.
- Is there a table everyone can work at, and a kitchen that supports six people cooking? Common space is the product; bedrooms are just where you sleep.
- What is included? Rent, utilities, internet and cleaning should be in one number, with no setup on your side.
- What happens if the batch extends, or you raise and stay? Month-to-month extension matters more than the headline rate.
- Who answers when something breaks, and how fast? During a batch, a dead router on a Saturday is a real cost.
- Any deposit, and what qualification is required? International founders without US credit history need to know this before they fly.
How cohort bookings work
For a program bringing a group, the mechanics differ from individual bookings. hyperstay does this regularly: twenty-one-plus rooms available across the portfolio, booked as a block across houses, coordinated to one arrival date, with the same all-inclusive monthly setup for each resident. Entire houses with six or more bedrooms are available for teams who want to stay together rather than be distributed.
The thing worth planning around is lead time. In a market with 3% vacancy in the neighbourhoods founders want and listings down 30% year over year, a block of twenty rooms is not something to arrange three weeks out. Programs that tell us their dates a quarter ahead get the houses they want; the ones that call in the week before acceptance letters land take what is left.
Rooms start around $3,000 a month and move with the season. All stays are a minimum of 30 nights. Rent, utilities, internet and cleaning are included.
If you are running a batch, a fellowship or a cohort coming to San Francisco — or you are a founder who just got in and has ninety days to make them count — write to team@hyperstay.com with your dates and headcount.
hyperstay has hosted founders and operators from Y Combinator, Hexa, Stanford's Mayfield Fellows Program, Latitud and General Catalyst-backed companies.