Building & Product

How founders use AI for AI Agents

The resources behind 15 questions founders actually ask, then the questions themselves, each with a straight answer.

On the AI map, 29 October 2026 Decision models Coding agents Agents that do tasks for you AI browsers No-code automation with AI steps

What founders use for ai agents, ranked by how many answers lean on it.

  1. A repeatable idea-to-deployed-MVP workflow with realistic timeboxes. vibecoding.app Guide Vibe Coder's Guide to Building a Shippable MVP in 4 Hours Vibecoding.app
  2. Video Simon Willison: Engineering practices that make coding agents work The Pragmatic Summit (Simon Willison)
  3. Honest answers on what coding agents still get wrong. simonw.substack.com Article Fireside chat about agentic engineering Simon Willison
  4. A dev-shop comparison grounded in client project work. f22labs.com Article Cursor Agent vs Claude Code: A Comparative Guide F22 Labs
  5. The episode that defined the category thesis; 300 potential billion-dollar companies. ycombinator.com Video Vertical AI Agents Could Be 10X Bigger Than SaaS Y Combinator Lightcone (Garry Tan, Jared Friedman, Harj Taggar, Diana Hu)
  6. The earlier YC talk with the playbook for picking your vertical. ycombinator.com Video Why Vertical LLM Agents Are The New $1 Billion SaaS Opportunities Y Combinator
  7. A VC's operating manual for going from wedge to platform in a vertical. bvp.com Guide Building Vertical AI: An early stage playbook for founders Bessemer Venture Partners
  8. Market sizing: services are 10x the software market, and agents tap them. bvp.com Article The State of AI 2025 Bessemer Venture Partners
  9. The macro argument for why agents expand rather than shrink the market. a16z.com Article Good news: AI Will Eat Application Software a16z
  10. Where a16z partners saw agent openings across industries. a16z.com Article Big Ideas in Tech for 2025 a16z
  11. Sierra's founder on agents as the new front door for every brand. sierra.ai Podcast No Priors Ep. 82: Bret Taylor on company-branded agents No Priors (Bret Taylor)
  12. Why enterprise software's future belongs to vertical agents, per its loudest champion. pigment.com Podcast Vertical AI Agents | Bret Taylor on Perspectives Pigment Perspectives (Bret Taylor)
  13. Puts the agent wave in the context of past platform shifts. stratechery.com Article An Interview with Bret Taylor About AI Agents and Tech History Lessons Stratechery (Ben Thompson)
  14. From Google Maps to Sierra: how he evaluates the agent opportunity. sierra.ai Podcast Bret Taylor on Lenny's Podcast Lenny's Podcast (Bret Taylor)
  15. Concrete, priced agent ideas you could start validating this week. x.com Thread 35 startup ideas to start in 2025 (SaaS, AI agents) Greg Isenberg
  16. A second batch of buildable agent wedges with revenue models attached. x.com Thread 30 startup ideas to build in 2025 (AI agents, SaaS, tools) Greg Isenberg
  17. A full teardown of how one vertical agent company reached $1.5B+. research.contrary.com Article Decagon Business Breakdown & Founding Story Contrary Research
  18. The competitive dynamics of the hottest vertical, told through two rivals. upstartsmedia.com Article Decagon, Sierra and the Race to Build Customer Support Agents Upstarts Media
  19. The unvarnished go-to-market grind behind a vertical agent startup. upstartsmedia.com Podcast Jesse Zhang on sales battles, AI wrapper revenge, and making agents work Upstarts Media (Jesse Zhang)
  20. Proof that boring niches (dealership phone calls) make great agent businesses. techcrunch.com Article Toma's AI voice agents have taken off at car dealerships TechCrunch
  21. The voice-agent market map, a whole sub-category of vertical opportunity. a16z.com Article Hi, AI: Our Thesis on AI Voice Agents a16z
  22. The India-specific map of agentic startups, funding and open gaps. inc42.com Article How India's Tech Landscape Got an Agentic AI Makeover in 2025 Inc42
  23. The company that popularized charging per resolution explains its own model. sierra.ai Article Outcome-based pricing for AI agents Sierra (Bret Taylor's team)
  24. The investor-grade case for why agent pricing had to change. a16z.com Article AI Is Driving a Shift Towards Outcome-Based Pricing a16z

Show the next 24

The questions

What actually is an AI agent, in plain language? An AI agent is an AI model that works toward a goal by deciding its own steps and using tools, where a chatbot answers one message and waits for the next. An... 7 resources → Why would a founder use agents instead of a chatbot or automation? Chatbots answer questions and classic automation follows fixed if-this-then-that rules; both break the moment a task needs judgment. Agents sit in between: t... 17 resources → What real tasks are founders delegating to agents today? Founders are handing agents inbound sales and lead qualification, customer support, competitor and market research, meeting prep and follow-ups, content draf... 21 resources → How do I build my first agent without being technical? Start inside the assistant you already pay for, and reach for a builder only when the job has to run across several apps. On Claude Pro ($20 a month) you can... 10 resources → Which platform or framework should I build my agents on? Match the tool to who is building. Non-technical founders should start no-code (Zapier Agents, Lindy, n8n) and only graduate when they hit a wall. If you hav... 20 resources → How much do AI agents cost to run, and how do I keep the bill under control? Token prices for equivalent quality fall roughly 10x a year, yet agent bills keep rising because agents burn about 50 times the tokens of a chat: every step ... 20 resources → How do I test an AI agent and know when it's reliable enough to trust? You test agents with evals: a set of real tasks plus grading logic, run repeatedly because the same input can produce different outputs. Start embarrassingly... 17 resources → What can go wrong when an agent acts on my behalf, and how do I keep it safe? The core risk is Simon Willison's lethal trifecta: an agent that reads your private data, sees untrusted content (any email or web page) and can communicate ... 19 resources → What is MCP, and why does it matter for my agents? MCP (Model Context Protocol) is an open-source standard for connecting AI applications to outside tools and data, which its own documentation compares to a U... 8 resources → Should I build one agent or a team of agents working together? Start with one. The famous industry debate (Cognition's "Don't Build Multi-Agents" vs Anthropic's multi-agent research system) actually agrees on the fundame... 18 resources → Can coding agents like Claude Code actually build my product? Yes, further than most founders expect: teams like Every ship multiple products with engineers writing almost zero code by hand, and 80-90% of Claude Code it... 20 resources → Is there a real startup opportunity in building vertical AI agents? Yes, and it may be the biggest one of this cycle: YC's partners argue vertical AI agents could be 10x bigger than SaaS because they tap labor budgets, not so... 19 resources → How should I price a product built on AI agents? Per-seat pricing breaks when your product replaces labor instead of assisting it: agents don't have seats. The market is converging on usage and outcome pric... 19 resources → Why do most AI agent projects fail, and what do the winners do differently? MIT's much-cited finding is that 95% of enterprise AI pilots deliver no measurable ROI, and the cause is rarely the model: it's missing context, no workflow ... 19 resources → How do I give my agent the right context and memory so it stops forgetting? Agents fail less because the model is dumb and more because its context window is stuffed with the wrong things: performance measurably degrades as context g... 18 resources →

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