Mark Milastsivy net worth
Quick answer
Mark Milastsivy's estimated net worth is $203.0M (range $142.1M – $304.5M) as of 2026. Mark Milastsivy is Founder at Firstbase.io. Firstbase.io valuation.
Mark Milastsivy is Founder at Firstbase.io (YC W21). Independent Entrepreneurial Check model estimate from public YC data.
At a glance
- Company status: Active
- Education: University of California, Berkeley
- Region: United States of America
- Industries: B2B, Operations
- Team size: 50
- Website: https://firstbase.io/
Who is Mark Milastsivy?
Mark Milastsivy is a founder at Firstbase.io, a company that simplifies the process of starting and running a business remotely.
Highlights:
- University of California, Berkeley
- Stripe
- Y Combinator W21
About Firstbase.io
Incorporation, compliance, bookkeeping, and taxes – all in one place.
FAQ: Mark Milastsivy net worth and Firstbase.io valuation
What is Mark Milastsivy's net worth?
Mark Milastsivy's estimated net worth is $203.0M (range $142.1M – $304.5M) as of 2026. Mark Milastsivy is Founder at Firstbase.io. Entrepreneurial Check publishes an independent model-based estimate from public company and role data. Not verified net worth, and Entrepreneurial Check is not affiliated with Y Combinator or the profiled companies.
What is Firstbase.io valuation?
Firstbase.io's estimated valuation on Entrepreneurial Check is $203.0M. That valuation, or a disclosed round when one is public, is the source for the paper-wealth estimate. Independent model output — not a verified appraisal or official mark.
What is Mark Milastsivy's role?
Mark Milastsivy is Founder at Firstbase.io, a Y Combinator-backed startup (batch W21).