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Datumo
No-code AI trust and safety evaluation platform. | Formerly known as SelectStar
About Datumo
Selectstar.ai, a Seoul-based company founded in 2019 by Howook Shin and Seyeob Kim, operates a platform for AI training data solutions. Seyeob Kim, who serves as CEO, graduated from KAIST with a degree in electrical and electronic engineering. The company has secured significant funding, including a Series A round of $66.7 million in August 2022, bringing its total funding to $67 million from investors like Kakao Ventures and Company K Partners.
The core of Selectstar.ai's business is to address the challenge of acquiring high-quality data for AI development. It provides a comprehensive suite of services for collecting, labeling, and validating various data types, including images, text, and videos. The business operates on a B2B model, catering to AI companies and research labs that require large volumes of accurate training data. This is facilitated through its crowdsourcing platform, "Cashmission," which engages a large pool of workers to perform data collection and annotation tasks. This platform employs a three-step quality control process involving qualification tests, performance monitoring, and peer-review validation to ensure data accuracy.
The company's platform offers a range of features such as object and line segmentation, classification, transcription, and comparison tools for data labeling. A key technological advantage is its semi-automatic annotation technology, where deep learning models perform initial annotations that are then refined by human workers, reducing cost and time. Furthermore, Selectstar.ai has developed "Datumo Eval," a solution for verifying the reliability of large language models (LLMs) and has been involved in operating AI red team challenges to assess AI model stability. The company also offers an open dataset project, providing free access to datasets built in collaboration with AI companies to foster industry development.
Source: Dealroom company dataAt a glance
- Status
- Operational
- Founded
- 2018
- Headquarters
- Daejeon, South Korea
- Employees
- 102
- Open positions
- 1
- Dealroom signal
- 89.0/100
- Industry
- Enterprise Software
- Sector
- AI, Core AI, Data Labeling, AI Applications, 4YFN 2025, 4YFN
- Technology
- Artificial Intelligence, Machine Learning, Deep Learning, Natural Language Processing, Computer Vision
- Business model
- Marketplace & ecommerce, SaaS
- Client focus
- b2b
Knowledge graph
More headlines
Funding history
Company financing events and reported valuations.
| Deal type | Date | Amount | Valuation | Investors | Source |
|---|---|---|---|---|---|
| SERIES B✓Equity / VC | Aug 2025 | $16M | $62M | Salesforce Ventures · SBI Investment · KB Investment · ACVC Ventures | ↗ |
| SERIES A✓Equity / VC | Aug 2023 | $3.4M | $13M | Korea Development Bank | ↗ |
Financials
Revenue, earnings and other financial measures where available. Years marked “E” are estimates.
Growth signals
Latest recorded traffic for Datumo is 22K monthly website visits, down 15.4% over the last three months. Datumo's team grew 13.3% over the past year.
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Investments and acquisitions
Recent portfolio relationships for companies that also act as investors or acquirers.
Investors
From Dealroom's funding and investor records, grouped by the round each investor first entered.
Seed1 investor entered at this stage
Series A9 investors entered at this stage
Company K Partners
Kolon Investment- NINow IB
- CICJ Investment
Korea Development Bank
Salesforce Ventures
SBI Investment
KB Investment
ACVC Ventures
Source: Dealroom Talent Intelligence.
Global footprint
team presence
Market sentiment
An AI-synthesised read of the highest-engagement posts about Datumo on X, ranked by likes and reposts, corporate channels excluded.
Reading the room on X — pulling top posts and synthesizing themes…
Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour
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