David Polonski Net Worth (Estimated)
Founder at BuildStream · YC S19
Quick answer
David Polonski's estimated net worth / paper wealth is $28K (range $20K–$42K) as of 2026.
David Polonski is Founder at BuildStream (YC S19). Independent Entrepreneurial Check model estimate from public YC data.
At a glance
- Company status: Inactive
- Region: Unspecified
- Industries: Real Estate and Construction, Construction
- Team size: 9
- Website: https://buildstream.co
Who is David Polonski?
David Polonski is a founder involved with BuildStream, a Y Combinator startup from the Summer 2019 batch.
Highlights:
- Y Combinator (S19)
- BuildStream
About BuildStream
BuildStream makes recruitment and payroll easier than ever for busy construction projects looking to hire temporary workers.
Clients get high quality, reliable workers in super quick time, while saving 35% on agency fees.
Workers finding jobs through us get better pay, faster pay, and are able to choose from high quality, local jobs.
Model inputs
- Stage: inactive
- Valuation tier: fallback-inactive
- Valuation note: no_discovery_sources [scale: acquired/inactive raise amount not used as 10× input]
- Research as-of: 2026-08-04
- Funding input: no public raise amount found; stage fallback valuation
FAQ: David Polonski net worth and BuildStream valuation
What is David Polonski's net worth?
David Polonski's estimated net worth / paper wealth is $28K (range $20K–$42K) as of 2026. Entrepreneurial Check publishes an independent model-based estimate from public company and role data.
David Polonski net worth
David Polonski's estimated net worth / paper wealth is $28K (range $20K–$42K) as of 2026. This David Polonski net worth figure is estimated paper wealth, not a verified statement of assets.
How much is David Polonski worth?
David Polonski's estimated net worth / paper wealth is $28K (range $20K–$42K) as of 2026. How much David Polonski is worth here means estimated paper wealth from public company and role data — not financial advice.
How rich is David Polonski?
David Polonski's estimated net worth / paper wealth is $28K (range $20K–$42K) as of 2026. “How rich is David Polonski” here means estimated paper wealth from public company and role data — not verified net worth or financial advice.
David Polonski fortune
David Polonski's estimated net worth / paper wealth is $28K (range $20K–$42K) as of 2026. This David Polonski fortune figure is estimated paper wealth only, not a verified statement of assets.
David Polonski equity value
David Polonski's estimated net worth / paper wealth is $28K (range $20K–$42K) as of 2026. David Polonski equity value on this page is modeled paper wealth from estimated ownership — not a disclosed cap table or verified net worth.
What is BuildStream valuation?
BuildStream's estimated valuation on Entrepreneurial Check is $1.0M. Independent model output, not a verified appraisal or official mark.
What is BuildStream post-money valuation?
BuildStream's estimated valuation on Entrepreneurial Check is $1.0M. That figure is a modeled post-money mark when a public raise is available — not a verified appraisal or official mark.
What is BuildStream funding?
BuildStream funding, when a public raise is available, is a model input on this Entrepreneurial Check profile. How much BuildStream raised is not a complete cap table — figures are estimates only.
How much did BuildStream raise?
How much BuildStream raised, when disclosed, informs the estimated BuildStream valuation and founder paper-wealth figures on this page. Independent estimate only — not a complete cap table or financial advice.
How much money did BuildStream raise?
How much money BuildStream raised, when a public figure is available, is a model input for the estimated BuildStream valuation on this profile. Estimates only — not a complete cap table.
What is BuildStream series funding?
BuildStream series funding, when a public raise is disclosed, informs the estimated BuildStream valuation here. Not a complete financing history.
What company is David Polonski building?
David Polonski is Founder at BuildStream, a Y Combinator-backed startup (batch S19).
What does BuildStream do?
BuildStream — Workforce solutions for the construction industry
What YC batch is David Polonski from?
David Polonski is associated with Y Combinator batch S19.
Where is David Polonski based?
Public directory data lists David Polonski's region as Unspecified.
What industry is David Polonski in?
David Polonski is listed under Real Estate and Construction, Construction.
How big is BuildStream?
Public data lists BuildStream's team size as 9.
What is BuildStream's status?
BuildStream is listed as Inactive in public company data.
What else is notable about David Polonski?
Y Combinator (S19).
Is Entrepreneurial Check affiliated with Y Combinator?
No. Entrepreneurial Check is an independent informational site and is not affiliated with, endorsed by, or sponsored by Y Combinator or the profiled companies.