Do FJ Labs and Y Combinator invest together?

Yes — FJ Labs and Y Combinator appear together in 8 tracked portfolio companies, including Abhi, Airbnb, Alana, AptDeco, Artie.

How do FJ Labs and Y Combinator compare on check size?

FJ Labs typically writes checks of $100K – $3M, while Y Combinator writes $500K.

Two firms that co-invest: side by side on stage, sector, check size, and track record, from public filings and the firms' own sites.

	FJ Labs	Y Combinator
Type	Venture capital	Accelerator
HQ	New York	San Francisco
Founded	2013	2005
Check size	$100K – $3M	$500K
Stages	Seed, Series A, Series B	Pre-Seed, Seed, Series A
Sectors	B2B Marketplaces, Marketplaces	AI & Machine Learning, Biotech, Climate Tech, Deep Tech, EdTech, Robotics, SaaS, Sector Agnostic, Space Tech
Tracked investments	100	6,130
Exits (acquired/public)	1	839
Led rounds on record	—	21
Dated deals, last 24 mo	1	1304

Do FJ Labs and Y Combinator invest together?: Yes — FJ Labs and Y Combinator appear together in 8 tracked portfolio companies, including Abhi, Airbnb, Alana, AptDeco, Artie.
How do FJ Labs and Y Combinator compare on check size?: FJ Labs typically writes checks of $100K – $3M, while Y Combinator writes $500K.