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South Korea's Wrtn challenges consumer AI playbook without building a model

By Choonsik Yoo ( August 8, 2025, 10:03 GMT | Comment) -- South Korean startup Wrtn is challenging assumptions about AI competitiveness by scaling rapidly without developing its own foundation model. Built on third-party LLMs, its consumer-facing service has become the country’s most downloaded app, combining language tools, emotional support and practical AI functions. Whether this model can be replicated elsewhere and whether expanding use cases will trigger regulatory scrutiny, however, remains to be seen.While breakthroughs in large language models, or LLMs, have dominated global headlines, South Korea’s Wrtn Technologies — pronounced like “written” — is drawing attention for what it hasn’t built: its own foundational model....

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