SEO for YC Startups San Francisco | Pipeline before runway runs out

Q: What does SEO for a YC startup in San Francisco actually look like?

We map the buyer searches your category leaders are not specifically owning, ship pages that win those searches, and engineer your brand into the AI answers your buyers are asking. Three surfaces, one team, one strategy that compounds while runway burns.

Q: Do you only work with YC-backed companies?

No. We work with founders across San Francisco in SaaS, dev tools, fintech, and AI infrastructure. The system works for any SF founder with customers actively searching.

Q: How fast can a YC startup expect results from SEO?

Striking-distance pages at positions 7 to 20 can move in 2 to 4 weeks because the relevance is already there. New pages take 2 to 3 months. Real compounding shows up around month 3 and keeps stacking. We tell you which lever applies to your starting point on the first call.

Q: How does AI citation work for a YC startup?

When a buyer asks ChatGPT or Perplexity for the best company in your category, your name should appear. We make that happen by building the topical depth and trust signals AI engines pull from.

Q: Are you actually in San Francisco?

We are remote-first with a San Francisco practice. The 66th was founded by Liam Lytton and runs a Bay Area book of business. We work with SF clients on Pacific time.

Q: What does month-to-month mean?

There is no long-term contract. If the work is not delivering, you cancel. We keep clients because the work compounds, not because of a lock-in clause.

Q: How do I pick the right SEO agency as a YC founder?

Look for a senior strategist running your account directly, proof of revenue outcomes (not just traffic), and case studies that include AI search results. A good SF SEO agency for a YC startup should show you what they did for a YC-backed company and how the numbers moved.

We rank your startup in Google search, on the AI tools your buyers are asking, and turn those rankings into qualified pipeline.

Compounding

Your rankings compound like the S&P 500.

You do the work this quarter. Buyers keep reaching you for years. Cost per lead bends down while the line bends up.

Compounding curve · illustrative

Organic

Why it matters

Why this matters before your next raise.

You stop renting attention. You start owning it.

01

You own the channel.

Ad accounts belong to Google. Rankings belong to you. Cancel us tomorrow and the pages keep ranking.

02

Your leads stop spiking with budget.

Ads collapse when you pause spend. Search delivers buyers every week, the same week, no spend reset.

03

Your cost per lead drops.

The pages we ship in month one are still ranking in year three. Same lead, lower cost, every month.

YC + SF case study

The flagship YC proof. One client. Two numbers.

Hedra is a YC AI company in San Francisco. Engagement ongoing.

Hedra · San Francisco, CA 4 MONTHS

Doubled revenue from organic Google. Quadrupled it from AI search.

4.8K2.5K5000

Jul 25Nov 25Feb 26May 26

In four months, revenue from organic Google grew +149%, revenue from AI search grew +354%, and the purchaser rate from organic Google grew nearly 5x. 18 published pages per month across bottom-of-funnel pages, comparison content for AI search, and AI-shaped blogs.

Read the Hedra case study

Reviews

Trusted by the founders we work with.

Google-verified reviews from the businesses we've helped.

★★★★★

"Working with The 66th has been a game-changer. They executed as planned and increased our revenue by 25% in three months."

Andrew Crookshank

Co-founder of Bilo Media Ad Agency

★★★★★

"Since working with The 66th team, the difference has been night and day. They've helped me achieve actual results."

Anastasiia Romaniv

Founder of Eightstation.com

★★★★★

"Liam and his team did my SEO and generative engine optimization. They were incredible. You will not be disappointed."

Clare Howard

Founder of Maison Rouge

★★★★★

"Working with this team has been a game-changer for us as a business. What really impressed us is how they've supported 044BUREAU in every aspect."

044 Bureau

Founders of 044bureau.com

★★★★★

"Within the first month, they increased our clients' organic traffic by 32%. Our clients' conversion rates improved by 18% through their technical optimizations."

Victor Klinkera

CEO and Founder of RCM

★★★★★

"Liam helped grow our online presence tenfold and increased our sales by over 140% in less than six months. I strongly recommend The 66th!"

Shawn Lytton

President of Maple Terroir

AI visibility

Why a YC SEO play has to win AI search too.

Most Google searches now end without a click. Your buyer asks ChatGPT or Perplexity instead. If you are not in the answer, you are not in the consideration set. We build for both.

ChatGPT

Claude

Perplexity

Gemini

Google AI

Copilot

Your Brand Cited 312× last 30d

Founder stage

From pre-seed to Series C.

If your buyers Google or ask ChatGPT before they sign, we can help.

01

Pre-seed & seed

You compete with companies that raised more than you. We rank you for the buyer searches your category leaders are not specifically targeting.

02

Series A

Your batch announcement spike is fading. We turn demo signups into a search channel that delivers leads every week.

03

Series B

Paid CAC is climbing. We build the owned search asset that takes pressure off the ads line.

04

Series C & beyond

You are competing for category dominance. We rank you for "best [category]" and get you cited as the default AI answer.

05

B2B SaaS

Long sales cycles start with a Google search. We rank the pages your buyer reads at every stage, from "what is" to "best" to "vs."

06

Dev tools & infra

Developers Google before they buy. We rank your docs, comparison pages, and integration guides for the searches your users run.

Comparison

Us vs a typical SF SEO agency.

Where the work and the relationship break differently.

Criteria

THE 66TH

Others

Approach

✓SEO and AI search in one system

×SEO first, AI sold as an add-on

Senior touch

✓Liam runs YC accounts directly

×Account manager between you and the strategist

Reporting

✓Weekly shipped log, monthly numbers, no black box

×Monthly recap slide deck

Lock-in

✓Month-to-month, you cancel anytime

×6 to 12 month minimum contract

FAQ

Questions YC founders ask.

Plain answers, no contract speak.

What does SEO for a YC startup in San Francisco actually look like?

Do you only work with YC-backed companies?

How fast can a YC startup expect results from SEO?

How does AI citation work for a YC startup?

Are you actually in San Francisco?

What does month-to-month mean?

How do I pick the right SEO agency as a YC founder?

SEO for YC Startups

San Francisco

that books real pipeline.

We rank your startup in Google search, on the AI tools your buyers are asking, and turn those rankings into qualified pipeline.

Three reasons YC founders work with a San Francisco SEO team.

Pipeline this quarter, not vanity traffic.

Compounds while runway burns.

Be the AI answer when ChatGPT recommends a startup.

Your rankings compound like the S&P 500.