Marble key facts
as of Oct 2026- Developer of artificial intelligence software intended to support accounting professionals in tax research and workflow automation.
- Marble is valued at approximately $31.0M as of Oct 2026 (last reported valuation).
- It has raised $9.0M; the latest was Seed Round ($9.0M) in Dec 2025.
- Notable investors include Susa Ventures, m]x[v Capital, Alterna Wealth Management (Florida).
- Status: Privately Held (backing).
Marble's last reported valuation, Dec 2025. Nothing priced has surfaced since.
- ·Watch Marble: the Monday email on marks, rounds and moves
Marble funding rounds
No funding rounds for Marble are on record yet — either the company hasn't raised institutional capital, or the raise hasn't surfaced in our sources.
Who backs Marble
3Marble valuation
Marble's last reported valuation was $31 million in Dec 2025. No priced round, secondary trade or fund mark has surfaced since.
Marble investors
3 investors are on record for Marble, including Susa Ventures, m]x[v Capital and Alterna Wealth Management (Florida).
About Marble
Developer of artificial intelligence software intended to support accounting professionals in tax research and workflow automation. The company's platform provides AI agents for instant information retrieval, memo and correspondence drafting, secure handling of client data, integration of project context through document uploads, and citation-backed answers to federal and state tax questions, enabling accounting firms and tax professionals to streamline research and improve drafting efficiency while maintaining data privacy.
- Sector
- Information Technology
- HQ
- New York, NY, United States
- Founded
- 2025
- Website
- marble.ai/
- Ownership
- Privately Held (backing)
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