Mosaic

YC S26 · Active · Defining the frontier of multiplayer AI.

Competitors

Companies closest to Mosaic
Company	Category	Status	Program
Agent RelayShared: agent shared, coding agent, sessionActiveAI, Devtools	AI, Devtools	Active	YCF26
WatoShared: shared memory, agent shared, workActiveAI	AI	Active	YCX26
HumanLayerShared: coding agent, multiplayer, togetherActiveAI, Devtools	AI, Devtools	Active	YCF24
InstaplayShared: frontier labs, coding, workActiveAI	AI	Active	YCS26
HubShared: frontier labs, realActiveAI, Data, Devtools	AI, Data, Devtools	Active	YCX26

Adjacent

Companies next to Mosaic
Company	Category	Status	Program
Perfectly ImperfectShared: someone elseNot statedOther	Other	Not stated	SPC2024
PetrarchShared: frontier labsActiveData	Data	Active	YCS26
Comfy DeployShared: someone else, together, sharedActiveDevtools	Devtools	Active	YCS24
BoilrShared: work togetherNot statedOther	Other	Not stated	Antler2023
Centauri AIShared: coding agent, session, workActiveAI, Devtools	AI, Devtools	Active	YCW24

Also from S26 in AI

All of S26

Company	Category	Status
6thSenseNervous System for Physical AIActiveAI	AI	Active
83 SciencesAI-native materials discovery powered by unpublished experimental dataActiveAI	AI	Active
Agentcardcards for AI agentsActiveAI	AI	Active
Agnost AIWe find where AI agents fail, then train better models to run them.ActiveAI, Data, Devtools	AI, Data, Devtools	Active
Akon LabsDatabricks for Enterprise CodebasesActiveAI	AI	Active
Alkera AIReliable and safe data engineering and data science agentsActiveAI, Data, Devtools	AI, Data, Devtools	Active

Founders

Shubham PatilFounder
Dorsa RohaniFounder

About Mosaic

Mosaic gives teams and their coding agents shared memory across every session, so everyone can understand what happened, why decisions were made, and pick up where someone else left off. We started as a real-time coding environment where multiple people and their agents can work together live. It went viral, defined the multiplayer AI category, and inspired frontier labs like Anthropic. Together, we’re building the infrastructure for people and agents to share context and work together.

YC batch: S26 · Summer 2026
Status, per YC: Active
Category: AI
Team size: 2
Location: San Francisco, CA, USA
Founded: 2026
Checked: 1h ago

YC tags: Artificial Intelligence

Mosaic in S26: 231 companies, 88% AI

Mosaic: questions

Which YC batch was Mosaic in?

Mosaic was in Y Combinator's Summer 2026 batch (S26).

Is Mosaic still active?

Y Combinator lists Mosaic as active.

Who founded Mosaic?

Mosaic's founders, as listed on its YC page: Shubham Patil (Founder), Dorsa Rohani (Founder).

Where is Mosaic based?

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

Sources: each program's public company list, read twice a week. Not affiliated with Y Combinator or any other program. Logos via logo.dev; trademarks belong to their owners.