What if your startup could go from an early idea to a company ready to meet some of the world’s most active startup investors in just three months?
The Y Combinator Winter 2027 (W27) Batch is a 3-month accelerator for early-stage founders building technology companies. Selected startups receive $500,000 in investment, intensive founder support, and access to YC’s global network of entrepreneurs and investors.
The programme is based in San Francisco, California, and culminates in YC’s highly anticipated Demo Day.
Quick Facts
- Opportunity Type: Startup Accelerator
- Host: Y Combinator
- Batch: Winter 2027 (W27)
- Location: San Francisco, California, USA
- Duration: 3 months
- Dates: January–March 2027
- Funding: $500,000 investment
- Equity: 7% for the initial $125,000 investment
- Additional Investment: $375,000 on an uncapped MFN SAFE
- Application Fee: No fee
- Startup Stage: Idea to early traction
- Founders: Technical and non-technical teams
- Nationality: International founders can apply
- Age: There is no minimum or maximum age requirement.
- Degree: There are no specific degree requirements or educational prerequisites.
- Work Experience: No specific prior work experience is required
- Application Deadline: November 2, 2026 at 8:00 PM PT
- On-Time Decision Date: December 11, 2026
What Is Y Combinator?
Y Combinator (YC) is a startup accelerator that works with founders building technology companies at very early stages.
The W27 programme is structured around helping founders make rapid progress on the things that matter most during the early stages of a startup:
- Building and improving the product
- Talking to customers
- Finding product-market fit
- Growing early traction
- Refining the company’s business model
- Preparing for fundraising
- Developing an effective investor pitch
The programme culminates in Demo Day, where participating startups present their companies to investors.
How Much Does YC Invest?
Accepted companies receive a total of $500,000 in investment under YC’s standard deal described in the provided information.
The investment is structured in two parts:
$125,000 for 7% Equity
YC invests $125,000 in exchange for 7% of the company.
$375,000 on an MFN SAFE
YC also invests another $375,000 through an uncapped MFN SAFE.
A SAFE is an investment agreement that can convert into equity in a future financing round.
The two investments together provide the startup with:
$500,000 total funding
Founders should review YC’s current investment documentation carefully before accepting any investment terms.
Does It Cost Anything to Apply?
No.
There is no application, processing or administrative fee to apply to YC.
However, this is an investment programme rather than a grant. YC invests in accepted startups in exchange for equity and future-equity rights under the applicable investment agreements.
Founders should therefore distinguish between:
Application cost: Free
Programme investment: YC invests in the startup
Founder ownership: Dilution occurs according to the investment terms
Who Can Apply?
YC is open to both technical and non-technical founding teams building scalable technology startups.
The programme can consider companies at very early stages, including startups that are:
- Still developing their idea
- Pre-product
- Pre-revenue
- Building an initial product
- Already generating early traction
You don’t necessarily need a fully developed company before applying.
The key is having a startup idea or product that the founding team is serious about building.
Can International Founders Apply?
Yes, the programme is open to founders building companies internationally.
Selected founders should, however, carefully review the current logistical and immigration requirements associated with participating in the San Francisco-based programme.
Where Does the Programme Take Place?
The W27 batch is scheduled to operate from San Francisco, California.
The programme runs for approximately three months, from January through March 2027.
This period is designed to be highly focused, giving founders an intensive environment in which to build, iterate and grow their startups.
What Happens During the 3 Months?
The programme focuses heavily on execution.
Founders can expect to spend their time working on areas such as:
Product
Build, test and continuously improve the product based on real user feedback.
Customers
Talk to users, understand their problems and determine whether the product is solving a meaningful need.
Growth
Develop strategies for acquiring users and demonstrating traction.
Fundraising
Prepare the company and pitch for conversations with investors.
Demo Day
Present the startup to investors at the end of the batch.
W27 Application Timeline
The current timeline provided is:
Application deadline: November 2, 2026
Time: 8:00 PM Pacific Time
For applicants who apply by the on-time deadline, decisions are expected on:
December 11, 2026
The batch is scheduled to begin in:
January 2027
and run through:
March 2027
How to Apply
Applications are submitted directly through the official Y Combinator application portal.
Before applying, founders should make sure their application clearly communicates:
- What they are building
- Who the users are
- What problem they are solving
- Why the founding team is suited to solve it
- What progress has been made so far
- What they have learned from users
- Any early traction or evidence of demand
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