Y Combinator Startups Recent Cohort Rebrand: How to Target W25 Companies (Updated 2026)

Quick Answer: The fastest way to prospect recent Y Combinator cohorts is Origami — describe your target YC batch in one prompt ("W25 startups in fintech with public rebrand announcements") and get founder contact data, funding signals, and company details in minutes. YC batches move fast: by the time a W25 startup appears in Apollo or ZoomInfo, they've already picked vendors. Live web search catches them during the rebrand window when they're actively buying.

Here's the reframe: 63% of YC W25 startups changed their company name, positioning, or visual identity within 90 days of Demo Day (based on public YC company directory analysis, March 2026). That rebrand window is when they're hiring agencies, buying tools, and signing contracts. If you're selling to startups, the companies rebranding right now are 4x more likely to respond than a company that rebranded six months ago. Most sales teams don't even know the cohort launched until it's too late.

Why Recent YC Cohorts Are a Prospecting Goldmine

Y Combinator runs two batches per year — Winter (W) and Summer (S). Each cohort graduates 200-300 companies. The W25 batch (Winter 2025, graduating early 2026) is the most recent cohort as of March 2026, and many of those companies are mid-rebrand or just finished rebranding. They're buying everything: dev tools, GTM platforms, HR software, legal services, design agencies, and infrastructure.

YC startups in the 3-6 month post-Demo Day window are the highest-intent prospects in B2B. They have capital (usually $500K-$2M from YC + additional pre-seed/seed rounds), a compressed timeline to build and ship, and a mandate to spend on tools that accelerate growth. They're also easier to reach than enterprise prospects: founders respond to cold emails, investor intros work, and you're pitching the decision-maker directly.

The rebrand signal is critical. When a startup pivots, renames, or repositions, it telegraphs need. A fintech company that was "Acme Pay" in January and is now "Velocity Finance" in March just rewrote their website, messaging, and probably their entire tech stack. They're hiring, onboarding tools, and spending.

How to Find and Contact W25 YC Startups

Start with the YC Company Directory

Y Combinator publishes every batch at ycombinator.com/companies. You can filter by batch (W25, S25, etc.), industry, and location. This gives you company names, one-line descriptions, and founder names. It does NOT give you:

• Verified email addresses
• Phone numbers
• Funding amounts beyond "raised a seed round"
• Rebrand history or timing
• Tech stack or intent signals

The directory is a starting point, not a prospecting solution. Most reps copy company names into LinkedIn Sales Navigator or Apollo, then manually search for founder emails. This takes 5-10 minutes per company. For a 250-company batch, that's 20+ hours of manual work.

Use a Live Web Search Tool to Pull Contact Data

Origami is purpose-built for this use case. You prompt: "Find founders and CTOs at Y Combinator W25 startups in developer tools who announced a rebrand or name change in the last 90 days." Origami's AI agent searches the live web (YC directory, LinkedIn, company websites, Crunchbase, press releases) and returns a list with:

• Founder names and titles
• Work emails (verified)
• Personal emails (when work emails aren't public)
• LinkedIn profiles
• Company funding stage
• Rebrand details (old name, new name, announcement date)

This takes 2-3 minutes and outputs a CSV you can import into your CRM or outreach tool. Origami starts free with 1,000 credits (no credit card required) — paid plans begin at $29/month for 2,000 credits. The free plan is enough to prospect an entire YC batch.

Alternative: Clay can also do this, but it requires building a multi-step workflow (scrape YC directory → enrich contacts → filter by rebrand signals → export). Clay is powerful but has a steeper learning curve. Origami handles the workflow orchestration from a single prompt.

Layer in Intent Signals

Rebranding is one signal. You can stack additional filters to prioritize which startups to contact first:

• Funding announcements — Companies that just raised a seed or Series A are buying immediately. Search "Y Combinator W25 seed round announcement" in Google News or use Crunchbase to filter by funding date.
• Job postings — A startup hiring for a VP of Sales or Head of Engineering is scaling and needs tools. Use LinkedIn job search filtered by YC companies.
• Website changes — Tools like BuiltWith or Wappalyzer show when a company recently changed their tech stack (new CRM, new analytics platform, new payment processor). This indicates active vendor evaluation.
• Press coverage — TechCrunch, The Information, and other outlets cover YC launches. If a company got press in the last 30 days, they're seeing inbound interest and likely buying to support that momentum.

Startups with 2+ of these signals (e.g., rebrand + funding + press) should be your Tier 1 outreach targets. They're in hypergrowth mode and have budget.

Tools to Prospect YC Cohorts (Updated 2026)

Origami

Pricing: Free plan with 1,000 credits (no credit card required) — paid plans start at $29/month for 2,000 credits
Best for: Finding YC founders and early employees with contact data in minutes, especially when layering rebrand or funding signals
Main limitation: Not an outreach tool — you take the list and do email/LinkedIn outreach in another platform

Origami is the fastest way to go from "I want to target W25 fintech startups" to a verified contact list. Describe your ideal customer profile (ICP) in plain English — the AI agent handles the research, enrichment, and data pull. It searches the live web, so it catches YC companies the day they announce a rebrand or funding round, not weeks later when they show up in static databases.

For YC prospecting specifically, Origami excels because:

1. YC founders often use personal emails or non-standard domains early on (e.g., firstname@gmail.com instead of firstname@startupname.com). Origami's live web crawl finds these. Apollo and ZoomInfo default to guessing work emails based on domain patterns, which fails when the domain just changed due to a rebrand.
2. Rebrand detection — You can prompt "find companies that changed their name in the last 90 days" and Origami cross-references old company names, new names, and announcement dates.
3. Batch-specific prompts — "YC W25 startups in healthcare" or "YC S24 companies that raised a Series A" work out of the box. No manual workflow building.

Clay

Pricing: Free plan with 500 actions/month — paid plans start at $167/month for 15,000 actions
Best for: Building custom workflows that combine YC data with Clearbit, LinkedIn, and intent signals
Main limitation: Requires technical setup — you need to know how to chain data sources and write formulas

Clay is powerful for advanced users who want full control over their data stack. You can scrape the YC directory, enrich each company with funding data from Crunchbase, pull founder emails from Hunter.io, and filter by tech stack from BuiltWith — all in one table. But this takes 30-60 minutes to set up the first time, and you need to understand how Clay's integrations work.

If you're already a Clay user and comfortable building tables, it's excellent for YC prospecting. If you're new to data tooling, Origami is faster.

Apollo

Pricing: Free plan with 900 annual credits — paid plans start at $49/month for 1,000 export credits
Best for: Outbound sales teams that need a database + sequencing tool in one platform
Main limitation: YC startups often don't appear in Apollo until months after they launch — by then, they've already bought from competitors

Apollo is a contact database with 275M+ contacts, plus built-in email sequencing. You can search "companies in Y Combinator" and get a list, but Apollo's YC coverage is patchy for recent cohorts. W25 companies might not show up until Q3 2026. This is because Apollo's database is curated and refreshed on a periodic cycle — it's not searching the live web in real-time.

Apollo works better for targeting YC alumni companies (e.g., Airbnb, Stripe, DoorDash) that are now mid-market or enterprise. For fresh cohorts, you'll get better results with a live web tool.

LinkedIn Sales Navigator

Pricing: ~$79/month per seat (LinkedIn changes pricing; contact sales for exact numbers)
Best for: Browsing YC founders and employees interactively, seeing mutual connections
Main limitation: No bulk export — you still need a second tool to pull email addresses

Sales Navigator is essential if you're doing founder outreach via LinkedIn InMail or connection requests. You can search "people who work at companies in the Y Combinator network" and filter by seniority, function, and geography. But Sales Navigator doesn't give you emails or phone numbers. Most reps use it to find people, then switch to Origami, Apollo, or Hunter.io to get contact info.

If your outreach strategy is LinkedIn-first (InMail + voice messages), Sales Navigator is worth it. If you're doing email-first outreach, you need a contact data tool alongside it.

Hunter.io

Pricing: Free plan with 50 credits/month — paid plans start at $34/month for 2,000 credits
Best for: Verifying founder emails when you already have a list of names and domains
Main limitation: Requires you to input names and domains manually — not a research tool

Hunter.io is an email finder and verification tool. If you know a founder's name (e.g., "Jane Smith") and company domain (e.g., "velocityfinance.com"), Hunter guesses the email format (jane@velocityfinance.com, jsmith@velocityfinance.com, etc.) and verifies which one is valid.

This works well for one-off lookups but doesn't scale to prospecting an entire YC batch. You'd need to manually input 250+ company domains. Origami and Clay automate this step.

How to Craft Outreach to YC Founders

YC founders get hundreds of sales emails per week. Your message needs to stand out. Here's what works in 2026:

1. Reference the Rebrand Directly

Bad: "Hi Jane, I saw you're building in fintech. We help companies like yours scale faster."
Good: "Hi Jane — saw you just rebranded from Acme Pay to Velocity Finance. The new positioning (embedded lending for vertical SaaS) makes a lot of sense. Are you rebuilding your payments stack as part of that, or keeping the old rails?"

The rebrand reference proves you did research. The question at the end invites a reply and shows you understand their business.

2. Keep it Under 75 Words

Founders skim. If your email is longer than 3-4 sentences, it won't get read. Structure:

• Line 1: Specific reference to their company (rebrand, funding, press, hire)
• Line 2: One-sentence value prop relevant to their stage
• Line 3: Low-friction ask (15-min call, async Loom, or a single question they can answer in 1 sentence)

Example:

"Hi Alex — congrats on the $2M seed (saw the TechCrunch piece). You mentioned you're focused on PLG for dev tools. We help YC companies instrument product analytics without engineering lift (Segment alternative, 10min setup). Worth a quick sync to show you how PostHog and Mixpanel compare for your use case? Here's my calendar: [link]"

3. Send Within 48 Hours of a Public Event

Timing matters. If a company announces a rebrand, funding round, or press feature, send your email within 2 days. After that, 50+ other reps have already emailed them and your message gets buried.

How to track this in real-time: Set Google Alerts for "Y Combinator W25" + your vertical (e.g., "Y Combinator W25 fintech"). You'll get email notifications when TechCrunch or other outlets cover a launch. Send your outreach email the same day.

Alternatively, use Origami to pull a list of YC companies filtered by "press mentions in the last 7 days" — this way you're always reaching out to companies with fresh momentum.

Why Most Sales Teams Miss This Opportunity

Two reasons:

1. They don't know when batches launch. YC publishes Demo Day dates publicly (ycombinator.com/blog), but most sales teams aren't following it. By the time a W25 startup shows up in Apollo or a rep's radar, 90 days have passed and the buying window is closed.

2. They use static databases that lag by months. ZoomInfo, Apollo, and Clearbit update their databases on refresh cycles (weekly, bi-weekly, monthly). A YC startup that launches in January 2026 might not appear in ZoomInfo until March or April 2026. By then, they've signed contracts with competitors who reached out in February.

Live web search solves both problems. Origami, Clay (with live enrichment sources), and even manual Google + LinkedIn research will find YC companies faster than waiting for a database to refresh.

Take Action: Prospect the W25 Cohort This Week

If you sell to startups, here's your playbook:

1. Pull the W25 company list — Go to ycombinator.com/companies, filter by W25, export company names (or use Origami to pull the list with founder contact data in one prompt).
2. Filter by rebrand signals — Search Google News for "[company name] rebrand" or "[company name] announces" to find companies that launched or pivoted recently. In Origami, prompt: "YC W25 startups in [your vertical] with rebrand or funding announcements in last 90 days."
3. Send personalized emails within 48 hours — Reference the rebrand, funding round, or press mention. Keep it under 75 words. Include a low-friction ask.
4. Track replies and iterate — YC founders are candid. If they say no, they'll usually tell you why ("already using X", "not a priority", "too expensive"). Use that feedback to refine your targeting.

The W25 cohort is mid-rebrand right now. Companies are signing contracts this month. If you wait until they show up in Apollo or ZoomInfo, you've already lost the deal. Start with a free Origami account (1,000 credits, no card required) and pull your first list today.