Question 1

Who is David YC Tseng?

Accepted Answer

David YC Tseng is a product builder and AI agent architect based in Taipei. He co-founded Lootex, a cross-chain NFT marketplace that raised $9M and reached 80k+ MAU before shutting down in March 2026, and currently builds DAGRUN, a SwiftUI macOS agent runtime, and Polyox, a prediction market intelligence platform. Writes the Chinese-language Product Lab newsletter (1,000+ subscribers, since July 2022) and the daily AI Flash Note podcast.

Question 2

Where is David based?

Accepted Answer

Taipei, Taiwan (Asia/Taipei).

Question 3

What is DAGRUN?

Accepted Answer

DAGRUN (Agent Local Task Orchestrator) is a native macOS agent runtime built in SwiftUI by David YC Tseng. It runs multi-step AI workflows locally on Apple Silicon, routes between OpenAI, Anthropic Claude, and on-device models (Ollama, Apple MLX), and keeps raw data on-device — LLMs receive only structured summaries.

Question 4

What did Lootex do?

Accepted Answer

Lootex was a gamer-centric, cross-chain NFT marketplace co-founded by David YC Tseng in 2018. It raised $9M seed funding, reached 140k+ wallets and 80k+ MAU, and ceased operations in March 2026. On-chain smart contracts remain functional.