What Is YC Bookface?
Bookface is Y Combinator's private, login-only platform for its own founders. Every founder of a company accepted into a batch gets an account, kept for alumni after the batch ends. YC's own Bookface landing page calls it "a private community for Y Combinator founders" and describes it as a combination of Facebook, Quora, and LinkedIn. Inside, founders search profiles of other YC founders and companies, post to an internal forum, browse an investor database, and claim negotiated vendor deals. It is separate from what YC runs publicly: the company directory, the founder directory, and Hacker News, all three open to anyone. If you never went through a batch, Bookface stays closed to you. The public YC startup directory on Round Funded covers the same companies, batch by batch, without a login wall.
What Is Inside Bookface
Bookface bundles five things into one login: founder profiles, a forum, vendor deals, an investor database, and a set of internal tools and resources. Per YC's What Happens at YC page, each founder has a profile and can tag themselves as an expert in any topic, and the forum is where founders post questions, intro requests, and polls to the rest of the network. YC's homepage, as archived in May 2025, called Bookface "our private social network" and listed "a forum for asking questions to the community, a founder directory for finding specific people who can provide advice and intros, and a company directory for finding potential customers," per that snapshot.
The Founder Directory
Every YC founder has a Bookface profile, per YC's About page. The directory itself is not entirely private: YC publishes a public Founder Directory at ycombinator.com/founders that, per that page, covers over 9,000 founders since 2005 and filters by batch, industry, region, and background, alongside a public Startup Directory of over 5,000 companies. Bookface adds the internal layer on top: the expert tags, the messaging, and the posting. Round Funded mirrors the same batch structure publicly, including the Winter 2026 batch, which YC's own directory lists at 199 companies per its batch filter, so a company's YC history is visible without a Bookface login.
The Discussion Forum
Bookface hosts a private forum where founders post to the YC network. YC's About page puts it plainly: "If you have a question, need an introduction, or want to poll for knowledge, you can post the request to the forum on Bookface." The same page describes Bookface channels for specific founder communities, including hardware, biotech, edtech, international, women founders, Black founders, and Hispanic and Latino founders. Y Combinator runs Hacker News publicly as a separate product anyone can read, not to be confused with Bookface's internal forum.
Deals and Perks
Each YC company receives access to discounts and free accounts for over 100 products, including hundreds of thousands of dollars of free cloud hosting per company from major cloud hosting providers, per YC's About page. YC's current Apply page puts a larger figure on the same benefit: each YC company gets access to $12M+ in free credits and deals from partners including OpenAI, Anthropic, AWS, Google Cloud, Azure, and Stripe, per YC. YC's homepage as archived in May 2025 counted over 1,000 deals, which companies reported to be worth in excess of $500,000, per that snapshot. These deals are a documented part of what founders get for joining a batch: the deals index sits behind the Bookface login at bookface.ycombinator.com/deals, and YC's partner FAQ says an approved deal is made visible to YC companies and redeemed there. They are separate from the perks aggregators that exist outside the YC network.
The Investor Database
One of the most cited parts of Bookface, in founder interviews and public write-ups, is its investor list. YC has described it as the YC Investor Database, with profiles and reviews of more than 50,000 startup investors, per YC's homepage as archived in May 2025; the current homepage no longer carries that line. YC's copy says profiles and reviews without saying who writes them. Investors who discuss it publicly describe founders rating investors: a November 2025 High Stakes podcast episode with K Street Capital's Paige Soya and Lobster Capital's Gabriel Jarrosson states that Bookface lets founders rate their experiences with investors, which makes it a founder-review layer rather than a set of funding notes, though YC itself does not say so. Intro requests go through the Bookface forum, per YC's About page. Outside YC, Round Funded's investor catalog covers 60,000+ active investors with stage, sector, and check-size filters, open to any founder.
The Tools and Knowledge Base
Bookface's own landing page lists tools for fundraising, hiring, and meeting scheduling alongside the community, per YC, and founders who describe the platform mention an internal knowledge base of playbooks and templates tied to their batch. A public subset of YC's writing lives at ycombinator.com/library, which anyone can read: essays, videos, and podcasts. The Startup School curriculum at startupschool.org/curriculum is built from the same YC partner talks and Paul Graham essays.
Who Gets Access to Bookface, and When
Bookface is part of the program itself, per YC's About page, so access comes with a place in a batch. YC also does not wait for the batch to start to invest: "The day a company is accepted to YC, we commit to investing our standard deal and begin the process to do so immediately," per YC's deal page, where the standard deal is $500,000. YC runs the program four times a year, in winter, spring, summer, and fall, per its About page. Access does not end with the batch: alumni keep it after the batch ends. YC says office hours "don't stop after the YC program" and that startups from all previous cycles can book time year round, that founders keep WhatsApp groups and Bookface channels, and that active YC founders get an early look at each new batch at Alumni Demo Day, per the same page. Two groups are often assumed to have access and do not: Startup School participants, since Startup School is "completely free" per its FAQ and its About page lists YC partner advice, co-founder matching, and a weekly update tool rather than Bookface, and applicants who did not get in. Founders researching how to apply to Y Combinator should know Bookface is a benefit of acceptance, not a preview. The bar is real, per our breakdown of the YC acceptance rate.
How Founders Actually Use Bookface
Founders who have written publicly about Bookface describe three habits: searching the investor database before a raise, posting a question to the forum instead of guessing, and claiming a vendor deal code before paying full price for infrastructure. Anh-Tho Chuong, Lago cofounder and YC alum, put it this way in Sifted, in a line later discussed on Hacker News: "Bookface is YC's knowledge base, and it answers 80% of the questions a founder can have." Demo Day puts a batch in front of "an audience of specially selected investors and press," per YC's About page, and many of those names sit in the investor database, so founders research a firm before the room ever sees a deck. Our Demo Day explainer covers what happens in that room.
What Non-YC Founders Can Use Instead: Step by Step
Every Bookface function has a public equivalent a non-YC founder can build alone. None of it requires an acceptance letter.
- Replace the founder directory. Start with the public YC startup directory on Round Funded: browse companies by batch, industry, and outcome, and open any profile for its batch, one-liner, and a preview of its reconstructed application, no login needed. YC's own public Founder Directory covers the people side by batch, industry, and region.
- Replace the investor database. Round Funded's investor catalog lists 60,000+ active investors with stage, sector, and check-size filters, the same filtering job Bookface's internal list does for YC founders.
- Replace warm intros. Without a batch to vouch for you, outreach has to carry the weight itself. Send from your own Gmail so replies land in your inbox, not a shared domain.
- Replace the deal perks. Vendor discount programs exist outside YC too: cloud providers, payment processors, and SaaS tools run public startup discount pages. They take longer to find without a curated list, so budget time to search each vendor's site directly. YC's blog documented deals for the 2017 and 2020 Startup School cohorts, with credits or discounts from AWS, Stripe, Google Cloud, and others, per YC; the current self-paced Startup School About page lists none, so whether that still runs is unverified.
- Replace the pitch tracking. Build a free, shareable Data Room, one link with your deck, traction, and ask, so investors see a live artifact instead of a stale PDF attachment.
- Track replies like a system. Log every contact, note who replied, and follow up on a schedule instead of a spreadsheet you forget to open. That discipline, not the login wall, is the part of a fundraise you control.
Where Round Funded Fits
Round Funded is not a Bookface clone, and it does not pretend to be: Bookface is YC's private network, built for people already inside it. What Round Funded covers is the public layer around YC, plus the investor and outreach tools every founder needs regardless of batch status.
| Bookface function | Who it is for | Round Funded equivalent |
|---|---|---|
| Founder directory | Public YC founder directory at ycombinator.com/founders (batch, industry, region); Bookface adds the internal profile layer | Public YC startup directory, open to any visitor |
| Investor database | YC founders only | Investor catalog, 60,000+ active investors, open to any founder |
| Deals and perks | YC founders only | Public vendor discount pages, searched per vendor |
| Forum and advice | YC founders only | No direct equivalent; general founder communities help |
| Warm intros | YC founders only | Cold outreach from your own Gmail, with reply tracking |
Every company in that directory links back to its batch, so you can go from a name you would only see inside a private forum thread to that same company's public profile in one click.
Browse the public YC startup directory on Round Funded →
Frequently Asked Questions
What is YC Bookface?
Bookface is Y Combinator's private, login-only platform for founders whose companies went through a YC batch. YC's own Bookface page calls it "a private community for Y Combinator founders." It bundles founder profiles, a forum, an investor database, and negotiated vendor deals into one members-only site. Non-YC founders can browse the public equivalent, the YC startup directory on Round Funded, without any login.
Who can access YC Bookface?
Only founders whose startup was accepted into a YC batch get a Bookface account, and access continues for alumni after the batch ends: YC says office hours run year round for startups from all previous cycles, per its About page. Startup School participants and applicants who were not accepted do not get access, regardless of how far they got in the application process.
Why is it called Bookface?
The name is a nod to Bookface working like an internal Facebook for YC founders. YC's Bookface page describes it as a combination of Facebook, Quora, and LinkedIn but never explains the name, so treat the Facebook origin as a repeated reading, not documented history. What YC does document is the builder: Garry Tan's YC bio says he built Bookface as a partner from 2011 to 2015.
Is there a Bookface alternative for non-YC founders?
Yes. No single tool replaces every Bookface function, but the pieces exist separately: a public YC company directory for research, an open investor catalog with 60,000+ active investors for outreach, and your own outbound process for the warm intros Bookface's network otherwise supplies.
Does Startup School give you Bookface access?
No. Startup School is YC's free public course and community, "completely free" per its FAQ, and its About page lists what signing up grants: advice curated by YC partners, co-founder matching, and a weekly update tool. A Bookface account is not on that list. Bookface stays reserved for companies accepted into a batch, and the acceptance rate for a batch is far lower than Startup School's open sign-up.
What is in the YC investor database on Bookface?
YC has described it as the YC Investor Database, with profiles and reviews of more than 50,000 startup investors, per YC's homepage as archived in May 2025. Investors on the High Stakes podcast describe founders rating investors; intro requests go through the Bookface forum, per YC's About page. Outside YC, the closest equivalent is Round Funded's investor directory, filterable by stage, sector, and check size.
Final Word
Bookface is real, useful, and closed to anyone who has not been accepted into a YC batch. That is fine: the parts of it founders use most, a real investor list and consistent outreach, exist outside the login wall too. Build the same discipline yourself and the closed network matters less than founders assume.
Browse the public YC startup directory on Round Funded →
Bookface is for YC founders. The public YC directory is for everyone else. Start with Round Funded.
