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River launch: what they're building and where to launch next

What they're building

The AI desktop.

Batch
Y Combinator Fall 2026
Industry
B2B
Team size
2
Based
San Francisco, CA, USA

meetriver.com ↗

See their funding details ↗

River on the record

What they shipped

  • From its YC profile: AI made software engineers 100x more productive. We're bringing that same transformation to knowledge workers with the AI desktop. (source)
  • Its own site describes it as: "Meet the AI desktop. Collaborate with AI on projects in River, with native documents, spreadsheets, presentations, a file system, and your team in one workspace." (source)

Who is behind it

  • 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. (source)
  • Chandler Supple, Founder/CEO: Co-founder @ River (YC F26). Prev. SWE @ Roboflow (YC S20), Z Fellows, co-founder @ Outwork, UC Berkeley CS dropout (source)

Pricing and product pages

  • Its pricing page lists $14/month, $36/month, $100/month. (source)

Timeline

  1. 2026: founded, per its YC profile. (source)

Other B2B software launches on FoxPlug

Where else to launch River

  • Product Hunt ↗
    Self-promotion allowedFree
  • Indie Hackers Forum ↗
    Self-promotion allowed
    Audience: IndieHackers; bootstrapped solo founders sharing revenue and behind-the-scenes
  • Hacker News (Show HN) ↗
    Self-promotion allowed, within the community's rules
    Audience: Hacker News readers; engineers, technical founders, infra-curious people
  • Demand Curve ↗
    Self-promotion allowed, within the community's rules
    Audience: Slack community; tight-knit, pseudo-private peer group
  • No Code Founders ↗
    Self-promotion allowed, within the community's rules
    Audience: Slack community; tight-knit, pseudo-private peer group
  • OnlineGeniuses ↗
    Self-promotion allowed, within the community's rules
    Audience: Slack community; tight-knit, pseudo-private peer group
  • Product Makers ↗
    Self-promotion allowed, within the community's rules
    Audience: Slack community; tight-knit, pseudo-private peer group
  • ProductLed ↗
    Self-promotion allowed, within the community's rules
    Audience: Slack community; tight-knit, pseudo-private peer group

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Featured on FoxPlug: River