Composal

Active · Swarms of agents acting like users to find bugs before release

YC F26

Website YC profile

Why it ranks

How the rank works

7signal of 100 · rising 7

went through YCProgram · this site+4
team of 3Team size · YC's directory+3.1

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

Competitors

e2eShared: bugs before, agent, userYC X26WarsawStartup →AIInactiveCodeballShared: find bugs, ship, codeYC W21StockholmStartup →AI

RASPIREShared: before release, code, realYC X26CairoStartup →Developer tools

CircleciShared: bugs before, test, code500 Global 2012United StatesStartup →AI

Bronco AIShared: find bugs, shipYC S23San FranciscoStartup →

Companies closest to Composal
Company	Category	Status	Program
e2eShared: bugs before, agent, userYC X26ActiveAI, Devtools	AI, Devtools	Active	YCX26
CodeballShared: find bugs, ship, codeYC W21InactiveAI, Devtools	AI, Devtools	Inactive	YCW21
RASPIREShared: before release, code, realYC X26 +1ActiveAI, Devtools	AI, Devtools	Active	YC +1X26
CircleciShared: bugs before, test, code500 Global 2012Not statedDevtools	Devtools	Not stated	500 Global2012
Bronco AIShared: find bugs, shipYC S23ActiveAI, Devtools	AI, Devtools	Active	YCS23

Adjacent

AIInactive

Lariat DataShared: bugs before, breakYC S21New York CityStartup →AI

InstaBoxShared: devsecops, cloud computing, agentYC X26San FranciscoStartup →AI

Rox AIShared: swarm, agentSPC 2024San FranciscoStartup →AI

Reason MachinesShared: cloud computing, bugs, agentYC F26San FranciscoStartup →AI

BeamShared: cloud computing, agentYC W22New York CityStartup →

Companies next to Composal
Company	Category	Status	Program
Lariat DataShared: bugs before, breakYC S21InactiveAI, Data, Devtools	AI, Data, Devtools	Inactive	YCS21
InstaBoxShared: devsecops, cloud computing, agentYC X26ActiveAI, Devtools	AI, Devtools	Active	YCX26
Rox AIShared: swarm, agentSPC 2024 +2Not statedAI	AI	Not stated	SPC +22024
Reason MachinesShared: cloud computing, bugs, agentYC F26ActiveAI, Devtools	AI, Devtools	Active	YCF26
BeamShared: cloud computing, agentYC W22ActiveAI, Devtools	AI, Devtools	Active	YCW22

Also from F26 in AI

All of F26

Armorer LabsContinuous security verification for AI systems in regulated…YC F26San FranciscoStartup →AI

BoatThe best cloud VMs for billions of agentsYC F26ParisStartup →AI

MaritimeThe managed cloud for AI agents.YC F26San FranciscoStartup →AI

OrgoComputers for AgentsYC F26San FranciscoStartup →AI

Agent 37Cloud Sandbox for AgentsYC F26New York CityStartup →AI

Agent RelayLet your teams' coding agents message each otherYC F26San FranciscoStartup →

Company	Category	Status
Armorer LabsContinuous security verification for AI systems in regulated…team of 2ActiveAI, Devtools	AI, Devtools	Active
BoatThe best cloud VMs for billions of agentsteam of 3ActiveAI, Devtools	AI, Devtools	Active
MaritimeThe managed cloud for AI agents.team of 3ActiveAI, Devtools	AI, Devtools	Active
OrgoComputers for AgentsActiveAI, Devtools	AI, Devtools	Active
Agent 37Cloud Sandbox for AgentsActiveAI, Devtools	AI, Devtools	Active
Agent RelayLet your teams' coding agents message each otherteam of 2ActiveAI, Devtools	AI, Devtools	Active

Founders

Pandelis ZembashisFounder/CEO
Jonathan DaviesFounder/CTO
Jan MoehlmannFounder

About Composal

Check features, not code. Composal sends a swarm of agents to use your product like your users do. They test real flows and edge cases to show you what works, what breaks, and if it’s ready to ship.

YC batch: F26 · Fall 2026
Status, per YC: Active
Category: AI, Developer tools
Team size: 3
Location: London, England, United Kingdom
Founded: 2026
Checked: 6h ago

YC tags: Developer Tools, DevSecOps, Cloud Computing, AI