Elyza vs Kakao Brain

Neither company has publicly disclosed a valuation, making a definitive size comparison difficult. Elyza employs 1-50 people, while Kakao Brain has 100-500 employees.

Kakao Brain has raised more in total funding at $100M, compared to Elyza's $30M — a gap of $70M.

Kakao Brain holds the higher Awaira Score at 58/100, compared to Elyza's 45/100. The Awaira Score is a composite metric factoring in valuation, funding, stage, team size, and market presence — a 13-point gap that reflects meaningful differences in scale or traction.

Elyza was founded by Tetsuya Yamada in 2019. Kakao Brain was founded by Kim Il-doo in 2017. Visit each company's profile on Awaira for a full founder biography.

Elyza: Elyza developed Japanese large language models and enterprise AI applications, building on top of open-source models including Llama to create fine-tuned Japanese language variants with high Japanese language quality, and offering enterprise AI services using its Japanese LLM capabilities for customer service, document processing, and content generation applications. The Tokyo company focused on the specific characteristics of Japanese language including script mixing, honorific speech levels, and domain-specific vocabulary.\n\nThe company raised approximately $30 million in venture funding before being acquired by KDDI, the Japanese telecommunications operator, in 2024. The acquisition gave KDDI an in-house Japanese AI capability to deploy across its telecommunications services and enterprise AI offerings for KDDI business customers, as Japanese telecoms operators compete to add AI features to their enterprise service portfolios.\n\nElyza operated in the Japanese LLM market alongside CyberAgent AI Lab, NTT AI research, and the open-source Japanese AI community centred around the National Institute of Informatics. The acquisition by KDDI reflects the pattern of large Japanese corporations acquiring AI startups to accelerate internal AI capability development rather than building Japanese-language AI expertise from scratch. Japanese LLM development requires significant training data in Japanese and expertise in Japanese language evaluation that international foundation model providers building Japanese language versions of their models must develop separately. Kakao Brain: Kakao Brain is the AI research and foundation model division of Kakao Corp, the dominant Korean internet and messaging platform company, developing large language models including KoGPT for Korean language, the Karlo text-to-image generation model, and AI infrastructure for deploying AI capabilities across the Kakao platform ecosystem spanning KakaoTalk messaging, KakaoPay, and Kakao Mobility. The Seongnam company operates as a corporate AI research unit with internal funding from Kakao Corp.\n\nFunded internally through Kakao Corp with estimated investment exceeding $100 million across research infrastructure, compute, and personnel, Kakao Brain develops AI capabilities that are deployed to the KakaoTalk base of over 50 million monthly active users in Korea and across Kakao enterprise and government client deployments. The unit has released open-weight Korean language models through the Hugging Face platform, contributing to the Korean open-source AI ecosystem.\n\nKakao Brain competes in Korean AI research and model deployment with Naver AI, Samsung AI, and LG AI Research, as well as international AI labs whose models must be adapted for Korean language performance. Its integration with KakaoTalk provides a unique distribution mechanism for consumer AI features, as KakaoTalk functions as South Korea primary social communication platform and an essential interface for daily life services from banking to government. The corporate research structure gives Kakao Brain resources and stability but limits the commercial independence and equity-based talent attraction that independent foundation model startups use to recruit researchers.

Kakao Brain was founded first in 2017, giving it 2 years of additional market experience. Elyza was founded later in 2019. In AI, even a year or two of head start can translate into significantly more training data, customer relationships, and institutional knowledge.

Elyza has approximately 1-50 employees, while Kakao Brain has approximately 100-500. A larger team often signals higher revenue or venture backing, but in AI, smaller teams are increasingly capable of building at scale.

Yes, Elyza and Kakao Brain are direct competitors — both operate in the Foundation Models space and likely target overlapping customer segments. This comparison is especially relevant for buyers evaluating both platforms.