AI tools & automation

YouTube

Recursive self-improvement as a startup alternative to fine-tuning

Y Combinator February 27, 2026

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AI tools & automation 10

AI strategy & adoption 8

Product-market fit 5

• Fine-tuning becomes worthless the moment the next frontier model ships
• Seven people beat Anthropic and Google on two major benchmarks under $100K
• Reasoning strategies in code — not better prompts — drive the biggest performance leaps

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AI strategy & adoption

YouTube

How the AI agent economy is reshaping dev tools

Y Combinator February 21, 2026

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AI strategy & adoption 9

Business models 8

Product-market fit 6

• Agents now choose dev tools autonomously — documentation quality decides winners.
• Resend became the default email API by optimising docs for LLMs, not humans.
• Agent-native infrastructure (email, phone numbers) is an open startup opportunity.

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Founder interviews

YouTube

How Claude Code was built: lessons from its creator Boris Cherny

Y Combinator February 17, 2026

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Founder interviews 10

Product-market fit 8

Hiring & recruitment 6

• Build for the model six months from now, not today.
• Every Claude Code feature came from latent demand, not a master plan.
• The entire codebase is rewritten every few months — scaffolding is always tech debt.

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AI tools & automation

YouTube

How tiny startup teams beat companies 20x their size with automation

Y Combinator February 14, 2026

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AI tools & automation 9

Automation & tools 8

Business models 6

• 4-person teams closing Fortune 500 deals against 100x larger competitors
• Three automation patterns: AI teammate, shared source of truth, per-employee agents
• Legion Health 4x'd revenue without hiring a single new ops person

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AI tools & automation

YouTube

OpenClaw creator on local AI agents and the death of most apps

Y Combinator February 7, 2026

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AI tools & automation 9

AI strategy & adoption 7

• A local agent can do anything your computer can do — cloud can't.
• 80% of apps just manage data; agents will replace them.
• Own your memory: markdown files on your machine, no vendor lock-in.

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AI tools & automation

YouTube

How coding agents are changing how engineers and founders work

Y Combinator February 6, 2026

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AI tools & automation 9

Automation & tools 7

• Senior engineers gain most — architectural taste beats raw coding speed
• Context poisoning degrades output past 50% tokens; clear it proactively
• Test coverage is the single biggest multiplier for agent performance

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Branding

YouTube

How YC redesigned its homepage to inspire founders, not convert them

Y Combinator January 30, 2026

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Branding 9

AI tools & automation 7

Design thinking 5

• An apply button mid-scroll kills the story you're trying to tell.
• Before/after founder photos make transformation tangible without a word of copy.
• Building live in Cursor with AI replaced Figma for interaction design.

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Conversion rate optimisation

YouTube

Startup website design review: what actually converts visitors

Y Combinator January 29, 2026

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Conversion rate optimisation 10

Copywriting 7

• Show the real product before asking anyone to book a demo.
• Forcing sign-up before the value moment is the biggest conversion blocker.
• Typography errors and vague animations compound into lost visitor trust.

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AI tools & automation

YouTube

How diffusion models work and why every AI builder should understand them

Y Combinator January 22, 2026

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AI tools & automation 9

AI strategy & adoption 7

• Flow matching reduces the entire diffusion training loop to five lines of code.
• Diffusion has displaced autoregressive methods in images, proteins, weather, and robotics.
• 30 training samples can be enough to learn a three-million-dimensional distribution.

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Customer discovery

YouTube

How to find your first users with a minimum evolvable product

Y Combinator January 14, 2026

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Customer discovery 9

MVP & prototyping 8

Product-market fit 7

• Finding first users is a search problem, not a persuasion problem
• Paying customers give sharper, faster feedback than free users
• Early adopters shape your product's entire evolutionary path

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Prospecting & outreach

YouTube

Stoke Space: Building the World's First Fully Reusable Rocket

Y Combinator January 8, 2026

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Prospecting & outreach 9

Identity & self-belief 7

Productivity & habits 6

• Rocket upper stages are still thrown away — Stoke is fixing that.
• A liquid-hydrogen heat shield lets their capsule survive 2,700°F reentry.
• Full reusability could trigger an 'iPhone App Store moment' for space.

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AI strategy & adoption

YouTube

The AI economy in 2025: stability, model shifts, and the startup opportunity

Y Combinator December 22, 2025

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AI strategy & adoption 10

Business models 7

Fundraising & VC 6

• Anthropic overtook OpenAI as the top API among YC founders in 2025.
• AI infrastructure overbuilds benefit startups — founders are YouTube, not Comcast.
• Post-Series A hiring looks the same; rising expectations offset AI productivity gains.

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Case studies

YouTube

How PostHog went from serial pivots to a $1.4 billion developer tool

Y Combinator December 10, 2025

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Case studies 9

Pivoting 7

Content marketing 6

• The product that works is often built from the pain of failed pivots
• Humor reaches 1,000x more people than useful content — make it funny
• One investor conversation closed a $75M round; the seed took 160 rejections

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AI strategy & adoption

YouTube

How Amplitude transformed from AI skeptics to all-in

Y Combinator December 3, 2025

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AI strategy & adoption 9

Case studies 7

Pivoting 6

• Why AI adoption at Amplitude was bottoms-up, not top-down
• SaaS customer-feedback loops break when AI capabilities are jagged
• Clear intrinsic motivation is the only thing that beats the urge to quit

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AI strategy & adoption

YouTube

AI unlocks consumer startup opportunities that were previously impossible

Y Combinator November 28, 2025

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AI strategy & adoption 9

Business models 8

Growth hacking 6

• AI is the first technology to democratise music creation like cameras did photos
• Micro-influencers (1k–10k followers) remain a mispriced distribution asset
• Revisit written-off categories — AI makes the 'graveyard' investable again

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