Business

River

Website
Founded 2026Origin source ↗Checked 2026-09-27

Overview

AI made software engineers 100x more productive. We're doing the same thing for knowledge work with the AI computer.

Company description As recorded 2026-11-08

Founders & team

Brian Joseff

Founder/CEO

Founder at River (YC F26). Previously founder at Bedrock (2020-2023). Neuroscience researcher at Stanford School of Medicine. Founding team at Progressly (acquired by Box). BA Economics from Dartmouth. Semi-pro soccer stint.

Founder profile As recorded 2026-09-27

Chandler Supple

Founder/CEO

Co-founder @ River (YC F26). Prev. SWE @ Roboflow (YC S20), Z Fellows, co-founder @ Outwork, UC Berkeley CS dropout

Founder profile As recorded 2026-09-27
2team members reported
Source-reported As recorded 2026-09-27

Founded 2026 · Source

News & product activity

Sources & observations

Y Combinator

Profile depthenriched profile
Website observationwebsite reachable
Last website check2026-11-11
Location · source statedSan Francisco, CA, USA
Pricing evidenceA pricing page was detected
Maturity: Launched · 3 of 6 areas documented

Source-based assessment · automated evidence rules

The company website offers product access through a trial, free start, app download, purchase, or onboarding with existing-account login. Customer adoption is not established by this evidence.

Company website: home Checked 2026-09-20

Overview Apps Integrations Collaboration Pricing Start free Sign In

Maturity is an evidence-based assessment, not a success rating. It may understate the current stage where evidence is limited. Coverage records documented areas, not a complete or independently audited company history.

Stage definitions
independent websitesource corroborationreachable websitedescriptive evidencesourced peoplesourced founding yearpricing page observed