Kakao Brain vs Sakana AI

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

Sakana AI has raised more in total funding at $200M, compared to Kakao Brain's $100M — a gap of $100M.

Sakana AI holds the higher Awaira Score at 65/100, compared to Kakao Brain's 58/100. The Awaira Score is a composite metric factoring in valuation, funding, stage, team size, and market presence — a 7-point gap that reflects meaningful differences in scale or traction.

Kakao Brain was founded by Kim Il-doo in 2017. Sakana AI was founded by David Ha in 2023. Visit each company's profile on Awaira for a full founder biography.

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. Sakana AI: Sakana AI develops foundation models using nature-inspired evolutionary and collective intelligence approaches to AI model development, exploring alternatives to the dominant paradigm of scaling single large models toward architectures that combine multiple smaller models or that use evolutionary algorithms to discover model configurations. The Tokyo company was founded by David Ha, former Research Director at Google DeepMind, bringing frontier AI research leadership and international AI community connections to Japan AI startup ecosystem.\n\nThe company raised approximately $200 million in funding from investors including New Enterprise Associates, Lux Capital, and Khosla Ventures, reflecting global investor confidence in the founding team research pedigree. Sakana AI has published research on evolutionary model merge approaches that generate new model capabilities by combining weights from existing trained models without additional training, attracting significant attention from the global AI research community for the technical novelty and practical efficiency of the approach.\n\nSakana AI occupies a distinctive position in the Japanese AI ecosystem as a research-first foundation model lab with global ambitions, combining international founding team credentials with Japan as a base for building AI capabilities outside the US-China AI race dynamic. The company research on alternative model development approaches positions it to contribute fundamental methodological innovations that could influence the broader AI field rather than competing purely on compute scale with OpenAI and Anthropic.

Kakao Brain was founded first in 2017, giving it 6 years of additional market experience. Sakana AI was founded later in 2023. In AI, even a year or two of head start can translate into significantly more training data, customer relationships, and institutional knowledge.

Both Kakao Brain and Sakana AI report similar employee counts of approximately 100-500. Team size is often a proxy for operational scale, though lean AI companies can punch well above their headcount.

Yes, Kakao Brain and Sakana AI 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.