Top accelerator startups

Startups14,448Programs29

14,448 startups · 29 programs

River

Active · The AI computer.

WebsiteYC profile

Why it ranks

How the rank works
7signal of 100 · rising 7
  • went through YCProgram · this site+4
  • team of 2Team size · YC's directory+2.5

A sum of public facts, not a judgement and not investment advice.

Competitors

OtherInactiveNilesShared: productivity, knowledge, workYC W17San FranciscoStartup →AIPaper InstrumentsShared: knowledge workYC X25San FranciscoStartup →AILovableShared: software engineerAntler 2023SwedenStartup →AICognition AIShared: software engineerSPC 2023San FranciscoStartup →AIAutostepShared: knowledge workYC X26San FranciscoStartup →
Companies closest to River
Company
NilesShared: productivity, knowledge, workYC W17InactiveOther
Paper InstrumentsShared: knowledge workYC X25ActiveAI
LovableShared: software engineerAntler 2023Not statedAI
Cognition AIShared: software engineerSPC 2023 +3Not statedAI
AutostepShared: knowledge workYC X26 +1ActiveAI

Adjacent

OtherAmbitus AIShared: knowledge workNeoStartup →AIZo ComputerShared: computerSPC 2023New YorkStartup →OtherSE3Shared: computerSeedcamp 2024Startup →AIRaycasterShared: knowledge workYC F24New York CityStartup →AIReason MachinesShared: software engineer, productivityYC F26San FranciscoStartup →
Companies next to River
Company
Ambitus AIShared: knowledge workNeo Not statedOther
Zo ComputerShared: computerSPC 2023Not statedAI
SE3Shared: computerSeedcamp 2024Not statedOther
RaycasterShared: knowledge workYC F24ActiveAI, Data
Reason MachinesShared: software engineer, productivityYC F26ActiveAI, Devtools

Also from F26 in AI

All of F26
AIRomaRoma is the to-do list that does itselfYC F26Startup →AISentient OSOn-device AI that knows your entire life and does your work overnight.YC F26San FranciscoStartup →AISpacesheepDocuments of the future: the collaboration surface for people and…YC F26San FranciscoStartup →AIVexoAn AI bracelet that remembers your day and acts before you ask.YC F26San FranciscoStartup →AI0.securityThe autonomous cybersecurity teamYC F26San FranciscoStartup →AIAcyclic LabsAgent swarms that make long-running tasks exponentially fasterYC F26LondonStartup →
Company
RomaRoma is the to-do list that does itselfteam of 3ActiveAI
Sentient OSOn-device AI that knows your entire life and does your work overnight.team of 2ActiveAI
SpacesheepDocuments of the future: the collaboration surface for people and…team of 2ActiveAI, Devtools
VexoAn AI bracelet that remembers your day and acts before you ask.team of 3ActiveAI
0.securityThe autonomous cybersecurity teamteam of 2ActiveAI, Devtools
Acyclic LabsAgent swarms that make long-running tasks exponentially fasterteam of 2ActiveAI, Devtools

Founders

  • Brian JoseffFounder/CEO
  • Chandler SuppleFounder/CEO

About River

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

YC batch
F26 · Fall 2026
Status, per YC
Active
Category
AI
Team size
2
Location
San Francisco, CA, USA
Founded
2026
Checked
6h ago

YC tags: Productivity, AI

Changes seen

One-linerOct 22, 2026

Rewrote its one-liner; it read "The AI desktop."

Source ↗
TagsOct 19, 2026

Newly tagged AI; no longer tagged Artificial Intelligence.

Source ↗

River in F26: 219 companies, 89% AI

LinkedIn

River: questions

Which YC batch was River in?

River was in Y Combinator's Fall 2026 batch (F26).

Is River still active?

Y Combinator lists River as active.

Who founded River?

River's founders, as listed on its YC page: Brian Joseff (Founder/CEO), Chandler Supple (Founder/CEO).

Where is River based?

River lists San Francisco, CA, USA as its location on YC's directory.