Thabet Mahayni works as a Partner at Definition. The firm's known portfolio counts 7 companies.
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Investment focus
Contacts
Affiliated funds' portfolios
Partner at Definition, whose known portfolio counts 7 companies
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Investor Profile
Founders in the listed sectors AI, FinTech, Hardware and SaaS, and focus areas Cybersecurity, Developer Tools, Embedded Finance and Enterprise SaaS fall inside that listing.
Definition appears in Growth, Late-Stage and Seed rounds across its known deals.
The firm portfolio and the focus above give founders context on whether Thabet Mahayni matches their raise.
Colleagues at Definition
Frequently asked questions
Who is Thabet Mahayni?
Thabet Mahayni is a venture capital investor based in New York, United States, listed as Partner at Definition. The known portfolio of that firm counts 7 companies. That portfolio belongs to the firm, not to Thabet Mahayni personally.
What does Thabet Mahayni invest in?
Listed sectors include AI, FinTech, Hardware and SaaS; listed focus areas include Cybersecurity, Developer Tools, Embedded Finance and Enterprise SaaS. Those tags come from the portfolios of the firms this profile is attached to, so they read as a record of what has been backed rather than a stated preference for what comes next.
What stage does Thabet Mahayni invest at?
Definition appears in Growth, Late-Stage and Seed rounds across its known deals, and Thabet Mahayni is listed there as Partner. Stage is the strongest single filter when you build a target list: an investor with no record at your stage rarely starts with you.
Which firm is Thabet Mahayni listed at?
Thabet Mahayni is listed as Partner at Definition. 2 other people in the database share a firm with Thabet Mahayni.
How do I contact Thabet Mahayni?
An email address, a phone number and a LinkedIn page are on file for Thabet Mahayni. The address stays masked on this page and is readable inside RaiseHunt after you create an account.
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Data: RaiseHunt investor dataset · Snapshot 5 September 2026 · How this data is built · Report a correction or request removal