ReasonBlocks
Specialized models that make your AI agents cheaper and more reliable.
ReasonBlocks is a ReasonBlocks appears to help teams review existing AI evals or generate evals from agent traces, then compare judges, test coverage, and model versions. The site positions it as an evaluation and benchmarking tool for agent infrastructure/model gateway workflows. AI agent company selling to Teams building and evaluating AI agents and model workflows. Latest disclosed round: Last known: Pre-Seed ($0). About 4 employees.
Product
- Agent type
- ReasonBlocks appears to help teams review existing AI evals or generate evals from agent traces, then compare judges, test coverage, and model versions. The site positions it as an evaluation and benchmarking tool for agent infrastructure/model gateway workflows.
- Primary buyer
- Teams building and evaluating AI agents and model workflows
- Integrations
- —
- MCP support
- —
- Pricing
- —
- HQ
- San Francisco, CA, US
- Founded
- —
- Profile ↗
Funding
- Date
- —
- Source
- Announcement ↗
- Investors
- First Peak Ventures; Y Combinator
Hiring
- Employees
- 4
- Growth 3m / 6m
- — / —
- Open roles (sample)
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- X mentions this week
- —
- X handle
- —
Top launch posts
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Recent news
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Sources
- Headcount
- Clay (LinkedIn)
- Open jobs
- —
- Traffic
- Clay (web traffic)
- X metrics
- —
- X handle (homepage-verified)
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- Clay enrichment
- Clay enrichment 2026-11-04
- seed_type
- YC directory
- funding_status
- Last known (aggregator source)
- funding_source_type
- aggregator
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About ReasonBlocks
What does ReasonBlocks do?+
Specialized models that make your AI agents cheaper and more reliable.
How much has ReasonBlocks raised most recently?+
Last known: Pre-Seed, led by {"Y Combinator"}.
How many employees does ReasonBlocks have?+
About 4 (3-month growth —).
Cite this data
ReasonBlocks profile. Agent Market Map, The GTM Engineering Newsletter. Last verified Nov 4, 2026. https://agentmarketmaps.com/company/reasonblocks