Seiji Yamamoto Net Worth (Estimated)
Founder at PerfectBit, Inc. · YC P26
Quick answer
Seiji Yamamoto's estimated net worth / paper wealth is $10.0M (range $7.0M–$15.0M) as of 2026.
Seiji Yamamoto is Founder at PerfectBit, Inc. (YC P26). Independent Entrepreneurial Check model estimate from public YC data.
At a glance
- Company status: Active
- Region: United States of America
- Industries: B2B
- Team size: 2
- Website: https://perfectbit.ai
Who is Seiji Yamamoto?
Seiji Yamamoto is a founder involved with PerfectBit, Inc. and participated in Y Combinator.
Highlights:
- Y Combinator
- PerfectBit, Inc.
About PerfectBit, Inc.
We create a new kind of data for training AI models. Most LLMs are pre-trained on noisy web-scraped text, but they hallucinate and still fail on tasks that humans find trivial. PerfectBit creates high-quality training data that's correct by construction. We verify against physics simulators, scientific databases, formal proof systems. LLMs, robotics, AI for Science, and more.
Model inputs
- Stage: seed
- Valuation tier: fallback-seed
- Valuation note: no_discovery_sources [scale: $500k-class amount looked like a YC check, not a published seed]
- Research as-of: 2026-08-04
- Funding input: no public raise amount found; stage fallback valuation
FAQ: Seiji Yamamoto net worth and PerfectBit, Inc. valuation
What is Seiji Yamamoto's net worth?
Seiji Yamamoto's estimated net worth / paper wealth is $10.0M (range $7.0M–$15.0M) as of 2026. Entrepreneurial Check publishes an independent model-based estimate from public company and role data.
Seiji Yamamoto net worth
Seiji Yamamoto's estimated net worth / paper wealth is $10.0M (range $7.0M–$15.0M) as of 2026. This Seiji Yamamoto net worth figure is estimated paper wealth, not a verified statement of assets.
How much is Seiji Yamamoto worth?
Seiji Yamamoto's estimated net worth / paper wealth is $10.0M (range $7.0M–$15.0M) as of 2026. How much Seiji Yamamoto is worth here means estimated paper wealth from public company and role data — not financial advice.
How rich is Seiji Yamamoto?
Seiji Yamamoto's estimated net worth / paper wealth is $10.0M (range $7.0M–$15.0M) as of 2026. “How rich is Seiji Yamamoto” here means estimated paper wealth from public company and role data — not verified net worth or financial advice.
Seiji Yamamoto fortune
Seiji Yamamoto's estimated net worth / paper wealth is $10.0M (range $7.0M–$15.0M) as of 2026. This Seiji Yamamoto fortune figure is estimated paper wealth only, not a verified statement of assets.
Seiji Yamamoto equity value
Seiji Yamamoto's estimated net worth / paper wealth is $10.0M (range $7.0M–$15.0M) as of 2026. Seiji Yamamoto equity value on this page is modeled paper wealth from estimated ownership — not a disclosed cap table or verified net worth.
What is PerfectBit, Inc. valuation?
PerfectBit, Inc.'s estimated valuation on Entrepreneurial Check is $20.0M. Independent model output, not a verified appraisal or official mark.
What is PerfectBit, Inc. post-money valuation?
PerfectBit, Inc.'s estimated valuation on Entrepreneurial Check is $20.0M. That figure is a modeled post-money mark when a public raise is available — not a verified appraisal or official mark.
What is PerfectBit, Inc. funding?
PerfectBit, Inc. funding, when a public raise is available, is a model input on this Entrepreneurial Check profile. How much PerfectBit, Inc. raised is not a complete cap table — figures are estimates only.
How much did PerfectBit, Inc. raise?
How much PerfectBit, Inc. raised, when disclosed, informs the estimated PerfectBit, Inc. valuation and founder paper-wealth figures on this page. Independent estimate only — not a complete cap table or financial advice.
How much money did PerfectBit, Inc. raise?
How much money PerfectBit, Inc. raised, when a public figure is available, is a model input for the estimated PerfectBit, Inc. valuation on this profile. Estimates only — not a complete cap table.
What is PerfectBit, Inc. series funding?
PerfectBit, Inc. series funding, when a public raise is disclosed, informs the estimated PerfectBit, Inc. valuation here. Not a complete financing history.
What company is Seiji Yamamoto building?
Seiji Yamamoto is Founder at PerfectBit, Inc., a Y Combinator-backed startup (batch P26).
What does PerfectBit, Inc. do?
PerfectBit, Inc. — Correct by construction AI training data
What YC batch is Seiji Yamamoto from?
Seiji Yamamoto is associated with Y Combinator batch P26.
What other companies is Seiji Yamamoto connected to?
Public associations for Seiji Yamamoto include PerfectBit, Inc..
Where is Seiji Yamamoto based?
Public directory data lists Seiji Yamamoto's region as United States of America.
What industry is Seiji Yamamoto in?
Seiji Yamamoto is listed under B2B.
How big is PerfectBit, Inc.?
Public data lists PerfectBit, Inc.'s team size as 2.
What else is notable about Seiji Yamamoto?
Y Combinator.
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.