1code.dev · Delaware, USA (registered entity jurisdiction); exact city of headquarters not disclosed (legal venue named in terms: Delaware) · founded 2025 · team Team size not disclosed on 1code.dev site · Y Combinator Winter 2026 (YC W26) batch · trust 0/4
| Company / product name | 1Code
source: https://1code.dev (browser page title '1Code — Run multiple coding agents in parallel') |
| Tagline / one-liner | Run multiple coding agents in parallel
source: https://1code.dev (browser page heading/subtitle) |
| City / location | Delaware, USA (registered entity jurisdiction); exact city of headquarters not disclosed (legal venue named in terms: Delaware)
source: https://21st.dev/terms (browser inspection of 1code.dev/terms link: 'The Agreement shall be governed by the laws of the State of Delaware') |
| Founded year | 2025
source: https://21st.dev (YC W26 batch; product launched publicly in 2025–2026 timeline, product marketed as part of Y Combinator Winter 2026 class) |
| Team members | Team size not disclosed on 1code.dev site
source: https://1code.dev (browser inspection — no team/about page or personnel listed) |
| Funding / stage | Y Combinator Winter 2026 (YC W26) batch
source: Public YC company directory listing for 1Code / 21st.dev |
| Founders / creators | Dmitry Mazayev (creator of 1Code) — cited in public media coverage
source: https://radio-t.com/podcast/2026/03/07/1043-2026-03-07/ — Radio-T podcast #1043 (2026-03-07) discusses 1Code with Dmitry Mazayev |
| Registered legal entity | 21st Labs Inc. (State of Delaware)
source: https://21st.dev/terms (accessed via 1code.dev/terms redirect): 'These Terms of Service are entered into by and between you and 21st Labs Inc.'; 'The Agreement shall be governed by the laws of the State of Delaware' |
| Contact email (on the startup's own domain) | not_found
source: https://1code.dev (browser inspection — no public mailto: or contact email on any page); 21st.dev/terms lists hello@21st.dev and support@21st.dev as official contact channels, but 1code.dev itself does not expose a public contact email |