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Developer-Tools bookmarks

19 bookmarks tagged Developer-Tools — raises, dev tools, and reading, newest first.

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Cool Company Raises · YC F26

Agent 37 launches at YC (Fall 2026)

Agent 37 runs coding agents as always-on hosted sandboxes, so you host neither the machine nor the state. One POST to /v1/instances provisions an isolated environment with its own URL that you can message across sessions; files, memory and connected tools stay put until you delete it. It runs Hermes, OpenClaw, Claude Code, Codex or a custom harness, in 2-8 vCPU / 4-16 GB sizes, with gVisor kernel-level isolation, encryption at rest and in transit, and SOC 2 Type I. There is no plan fee — compute meters by the minute at $0.0011 per vCPU-hour and $0.00096 per GB-hour of RAM, which puts a continuously running 2 vCPU / 4 GB sandbox near $4.76 a month. Founded in 2026 by Vishnu Krishnaprasad, based in New York City.

Developer-ToolsSAASB2BYCAI

10 Sept

Cool Company Raises · YC F26

Mirrors launches at YC (Fall 2026)

Mirrors builds runnable staging environments for AI agents. It captures production traces from an agent's real sessions, reconstructs a working twin of the internal tools and APIs that agent calls, then replays those sessions against every prompt, model or tool change before it ships — so regressions surface in staging rather than in production. The gap it fills is that agents call bespoke internal services no standard test suite can reproduce, which matters most where a mistake is irreversible: issuing refunds, updating records, sending outbound messages. Founded in 2026 in San Francisco by Aryan Singhal (ML research at UT Austin and UCSB; six AI/ML papers published while in high school, three at NeurIPS). Y Combinator Fall 2026.

Developer-ToolsSAASB2BYCDevopsAI

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