CompanyUnclaimedB2B

ReasonBlocks

The runtime layer that makes AI agents cheaper and more reliable

reasonblocks.com

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About

ReasonBlocks is the runtime layer that makes AI agents cheaper and more reliable. We correct agent reasoning and compress tokens mid-run, with gains compounding across runs. On SWE-Bench pro we have seen a 52% token reduction and 42% accuracy lift. ReasonBlocks is a Y Combinator company (Spring 2026). YC-listed status: Active.

Location
San Francisco, CA, USA
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Ownership
unclaimed

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  • ReasonBlocks — Drop-in runtime middleware for AI agent pipelines that catches failures mid-run, cuts tokens, and improves reliability without changing agent code. · Developer Tool

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