Hopper
First agentic development environment for mainframe/COBOL
Hopper is the first agentic development environment for the mainframe. It's Cursor for mainframes. It combines a real TN3270 terminal, mainframe-aware panels for datasets, jobs, members, and spool output, and an AI agent that can operate across z/OS workflows. The agent can inspect datasets, read and edit PDS members, write JCL, submit jobs, parse JES output, explain failures, and help developers debug mainframe workflows faster. Hopper is available on Windows, Linux, and macOS.
Hopper is a Productivity company. It is a Y Combinator company (F26). It launched on Product Hunt on May 12, 2026, with 101 upvotes. Adamlead has 1 person on file at Hopper.
Hopper timeline
- First agentic development environment for mainframe/COBOL
People at Hopper
Emails are shown masked, with whether each one has been verified. They're unlocked in the app with Lifetime access.
| Name | Title | |
|---|---|---|
| Maker | – |
Frequently asked questions
Who works at Hopper?
Adamlead has 1 person on file at Hopper, including Kevin Huang (Maker). Each email shows whether it has been verified.