// Companies & jobs

Build a list of YC startups in an industry

Turn the Y Combinator directory's Developer Tools page into a clean list of 30 companies with batch and location.

stagehand code-mode agent (mcp facade), browserbase recording at 2× speed, no sound

21 agent tool calls, click to jump

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Why it’s hard

A directory built for browsing, not exporting: hundreds of cards rendered client-side, with labels that come and go.

  • The list renders client-side after the page loads
  • Hundreds of cards on one page, of which only the first 30 are wanted
  • Location and batch labels are missing on some cards

Stagehand vs. Playwright MCP

Given the same goal and model, the Stagehand code-mode agent finished for 58% less than an agent driving Playwright MCP.

stagehand code mode agent3/3 runs succeeded
$0.313
playwright mcp agent2/3 runs succeeded
$0.749

medians over successful runs, or over all runs when none succeeded; lower is better

Then run it as a script

Once the flow works, the cookbook runs it as plain Stagehand calls. With caching on, a re-run cost about the same as the first run.

cookbook, first run3/3 runs succeeded
$0.120
cookbook, cached re-run3/3 runs succeeded
$0.120

medians over successful runs, or over all runs when none succeeded; lower is better

anthropic/claude-sonnet-5 at $2 input · $0.2 cached · $2.5 cache write · $10 output per 1m tokens · stagehand 4.1.0 · playwright mcp 0.0.82 · agents stop after 60 llm calls · run on 2026-09-27 · methodology

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Run it yourself

Give the same goal to Claude Code with Stagehand’s code-mode MCP server, which exposes three tools: run, snapshot and screenshot. Once the flow works, the cookbook runs it as a plain Stagehand script.

the goal both agents were given

From the Y Combinator directory's Developer Tools industry page, report the first 30 companies listed, each with its name, one-line description, location (null if not shown) and YC batch.

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