Hypercubic provides AI-native infrastructure for mainframe operations and modernization, helping enterprises understand, preserve and modernize legacy COBOL systems. Roughly 70% of Fortune 500 companies still rely on mainframes for core applications in banking, insurance, telecom, airlines and retail, while the COBOL workforce ages and retires. Its flagship product, Hopper, is an agentic development environment for IBM mainframes that combines a TN3270 terminal with AI to navigate z/OS workflows, write and edit COBOL, generate JCL, submit jobs and explain failures. Hypercubic was founded by former Apple machine learning engineers, is based in San Francisco, and is part of Y Combinator's Fall 2025 batch.
Hypercubic
ActiveAI to maintain and modernize COBOL
Total raised
$500K
1 round
Stage
Seed
Jan 2025
Team
1-10
since 2025
Pricing
—
Founded
2025
San Francisco, United States
Agent-ready
—
Hopper, an agentic development environment for IBM mainframes
TN3270 terminal combined with AI assistance
Navigates z/OS workflows autonomously
Writes and edits COBOL code
Generates JCL and submits jobs
Explains job failures and errors
AI-native infrastructure for mainframe operations and modernization
Helps understand and preserve legacy COBOL systems
12/100
Early
MCP server
Public API
Webhooks
OAuth 2.0
SDKs
No public agent surfaces detected yet.
Jan 2025 Seed $500K ● Y Combinator
Capital network
$500K raised ·1 backer·10 network links
- Backers1
- Shared portfoliocompanies these backers also fund
- Extended networkfunds that co-invest alongside them
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- What does Hypercubic do?
- Hypercubic provides AI-native infrastructure to maintain and modernize COBOL and mainframe systems. Its agentic environment, Hopper, navigates z/OS, writes COBOL, generates JCL, and explains failures.
- Why is this needed?
- Roughly 70% of Fortune 500 companies still rely on mainframes for core applications in banking, insurance, telecom, airlines, and retail, while the COBOL workforce ages and retires.
- What is Hopper?
- Hopper is an agentic development environment for IBM mainframes that combines a TN3270 terminal with AI to navigate z/OS workflows, write and edit COBOL, generate JCL, submit jobs, and explain failures.
- Who is it for?
- It is built for enterprises that need to understand, preserve, and modernize legacy COBOL and mainframe systems.
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