Seed VC · Boston
MCJ backs extraordinary founders leading the transition of energy and industry and solving the inevitable impacts of climate change. We discover and invest in startups rewriting industries to be cleaner, more profitable and more resilient.
Business models
deeptech_ip, saas_b2b, hardware, platform
Customer segments
Enterprise, Utilities, Data Centers, Manufacturers
Geography
US
+ 3 more deals. Score your deck to see the full investment history.
We never publish partner emails directly — score your deck to unlock contacts for the firms ranked as best-fit.
MCJ Collective writes first institutional checks where the founder + early product matter more than traction. The seed market is the most dispersed segment of venture; matching to thesis (sector, stage, geography) is where most cold outreach succeeds or fails. VCboom tracks MCJ Collective alongside 47,000+ other active investors, ranked weekly by recent-deal momentum, sector concentration, and partner activity.
Drop your pitch. AI scores it on the 8 dimensions VCs read for and ranks the 47,000+ active investors in the database by fit. MCJ Collective is one of them — and we'll tell you exactly where they sit in your top 100.