21st
YC W26 ↗San Francisco, US · Founded 2024 · 3 employees · 3 known investors
21st.dev provides a library of thousands of components and templates from the community for developers to use in building applications.
Founders & leadership· Y Combinator alumni (W26)
SK
Serafim Korablevin𝕏CEO / co-founder
SB
Sergey Bunasin𝕏Founder
Investors · 3
In the news
- New federal housing law could help Berkshire County build more affordable homes | Local News | The Berkshire Eagleberkshireeagle.com · 2026
- 21st - Infrastructure for AI agentsycombinator.com · 2026
- Integrate raises $17M to move defense project management into the 21st century | TechCrunchtechcrunch.com · 2026
- 21st CCLC Funds to Be Released Following Widespread Supportkidsparkeducation.org · 2025
- Release of 21st CCLC funding imminentafterschoolalliance.org · 2025
- FY 2026 Budget Proposal details released: Administration eliminates dedicated funding for afterschool and summerafterschoolalliance.org · 2025
- 21st.BIO Raises €86M In Funding - FinSMEsfinsmes.com · 2021