5 YC startups building infra for coding agents: Boxes, Caveman, Rystic, Simulithic
KlausCodes · x · 2026-10-24
After attending Y Combinator's Early Access event, the author highlights five startups targeting a new need: running, testing and improving AI-built software. Boxes offers cloud computers to run Claude Code and Codex in parallel; Caveman cuts agent token costs; Rystic builds simulated APIs for testing agents without live services; Simulithic sends AI users through your app across devices to catch broken flows automatically.
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