Weavel
The business, the turning points, and the decisions behind them.
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Sections to complete：02 · 05
01 / WHAT IT BUILT
What the company did
Weavel was a San Francisco AI tooling startup founded in 2023 by Andrew Chung, Hyun Jie Jung and Junyoung Park. It built an analytics and automation layer for products powered by large language models, starting with Ape — an AI prompt engineer that continuously traced, tested, curated datasets and iterated prompts to improve LLM-based conversational products. It joined the Y Combinator Summer 2024 batch, raised a $500,000 pre-seed in September 2024 from investors including Y Combinator, Silversmith Capital Partners and Claire Hughes Johnson, and is now listed as shut down.
02 / FAILURE REASONS
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03 / EVENT HISTORY
Events in the structured record
- Company founded
Andrew Chung, Hyun Jie Jung and Junyoung Park found Weavel in San Francisco to build LLM analytics and prompt-engineering tooling.
- Peak funding round
Weavel joins the Y Combinator Summer 2024 batch and raises a $500,000 pre-seed in September 2024; the company is later listed as shut down.
04 / CONTEMPORARY REBUILD ASSESSMENT
Difficulty of rebuilding this project today
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Overall assessment: Not completed
05 / CAUSAL CHAIN / AFTERMATH
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