Louis Lecat Net Worth (Estimated)

Who is Louis Lecat?

Louis Lecat is a founder at Upstream, which participated in Y Combinator's Summer 2023 batch.

About Upstream

Your inbox, handled for you. Upstream's agents sort the noise, draft replies in your exact voice, follow up at the right time, and do what you ask - like finding receipts or scheduling meetings - so you can fly through your inbox and have fun doing it.

Model inputs

• Stage: pre-seed
• Valuation tier: raise-10x
• Funding input: reported raise $3.0M
• Valuation note: Leftover $3M matches the Connect/Kima pre-seed. Do not lock YC-only checks or name-collision Upstreams.
• Research as-of: 2026-09-14
• Funding source: https://tech.eu/2026/06/03/upstream-raises-3m-to-launch-collaborative-ai-inbox-backed-by-yc-and-xavier-niel/

FAQ: Louis Lecat net worth and Upstream valuation

What is Louis Lecat's net worth?

Louis Lecat's estimated net worth / paper wealth is $15.0M (range $10.5M–$22.5M) as of 2026. Entrepreneurial Check publishes an independent model-based estimate from public company and role data.

Louis Lecat net worth

Louis Lecat's estimated net worth / paper wealth is $15.0M (range $10.5M–$22.5M) as of 2026. This Louis Lecat net worth figure is estimated paper wealth, not a verified statement of assets.

How much is Louis Lecat worth?

Louis Lecat's estimated net worth / paper wealth is $15.0M (range $10.5M–$22.5M) as of 2026. How much Louis Lecat is worth here means estimated paper wealth from public company and role data — not financial advice.

How rich is Louis Lecat?

Louis Lecat's estimated net worth / paper wealth is $15.0M (range $10.5M–$22.5M) as of 2026. “How rich is Louis Lecat” here means estimated paper wealth from public company and role data — not verified net worth or financial advice.

Louis Lecat fortune

Louis Lecat's estimated net worth / paper wealth is $15.0M (range $10.5M–$22.5M) as of 2026. This Louis Lecat fortune figure is estimated paper wealth only, not a verified statement of assets.

Louis Lecat equity value

Louis Lecat's estimated net worth / paper wealth is $15.0M (range $10.5M–$22.5M) as of 2026. Louis Lecat equity value on this page is modeled paper wealth from estimated ownership — not a disclosed cap table or verified net worth.

What is Upstream valuation?

Upstream's estimated valuation on Entrepreneurial Check is $30.0M. Independent model output, not a verified appraisal or official mark.

What is Upstream post-money valuation?

Upstream's estimated valuation on Entrepreneurial Check is $30.0M. That figure is a modeled post-money mark when a public raise is available — not a verified appraisal or official mark.

What is Upstream funding?

Upstream funding, when a public raise is available, is a model input on this Entrepreneurial Check profile. How much Upstream raised is not a complete cap table — figures are estimates only.

How much did Upstream raise?

How much Upstream raised, when disclosed, informs the estimated Upstream valuation and founder paper-wealth figures on this page. Independent estimate only — not a complete cap table or financial advice.

How much money did Upstream raise?

How much money Upstream raised, when a public figure is available, is a model input for the estimated Upstream valuation on this profile. Estimates only — not a complete cap table.

What is Upstream series funding?

Upstream series funding, when a public raise is disclosed, informs the estimated Upstream valuation here. Not a complete financing history.

What company is Louis Lecat building?

Louis Lecat is Founder at Upstream, a Y Combinator-backed startup (batch S23).

What does Upstream do?

Upstream — The first inbox designed for humans and agents

What YC batch is Louis Lecat from?

Louis Lecat is associated with Y Combinator batch S23.

Where is Louis Lecat based?

Public directory data lists Louis Lecat's region as France.

What industry is Louis Lecat in?

Louis Lecat is listed under B2B, Productivity.

How big is Upstream?

Public data lists Upstream's team size as 7.

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.