Mainframe

Mainframe wants to redefine human-computer interaction with a future operating system where agents are the new apps. Founded by Jordan Singer, who sold his last startup Diagram to Figma.

AI agents

Mainframe raised $5.5M in a Seed round announced December 10, 2024, according to x.com. Investors in that round: Lachy Groom.

Raise history

1. September 29, 2026
   First seen by Recent Funding
   via startups.gallery
2. December 10, 2024
   Seed · $5.5M
   LLachy Groom (lead)
   Source: x.com (startups.gallery listing)

Investors

• Bbasecase capital
• LLachy Groom
• SStellation Capital
• WWeekend Fund

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Every amount links to the page it came from. How Recent Funding sources and verifies funding data. The same data as JSON: /api/v1/companies/mainframe.