Ian Rountree is a venture capital investor. He is a founder and general partner at Cantos.
What Ian can write
Writes checks of$500K to $1M
Comes in atPre-seedCan lead the round
Ownership target5-7%, 7-10%At first check
Best routeA short note on LinkedInA warm intro from a founder they backed works better.
Cantos writes $500K to $1M checks, larger than 71% of firms in the atlas.
Bars: how many firms report each check band. Highlighted: Cantos.Companies founded
Cantos
Investments named in public bios
Atomos SpaceEARTH AISalient Motion
Focus
deep techclimateTechBioaerospacenext-gen computing
Before you pitch
Cantos does not invest inSoftware - We exclusively invest in cutting edge IRL technology companies that have a chance at global scale mitigation of climate change, disease, armed conflict, or poverty.
Also at Cantos
Partners like Ian
At firms with a similar stage, sector and check size.
Alert me when Cantos is active
One email when Ian's firm raises a fund, adds a partner or shows new activity.
Send Mode VC your deck
Raising a pre-seed or seed round? We write $1M to $5M first checks and help founders with distribution. A partner reads every deck.
Send your deckQuestions
Who is Ian Rountree?
Ian Rountree is a venture capital investor. He is a founder and general partner at Cantos.
How much does Ian Rountree invest?
Ian Rountree invests through Cantos, which writes checks of $500K to $1M at pre-seed.
How do I pitch Ian Rountree?
A warm intro from a founder Cantos backed works best. A short LinkedIn note with one line on traction is the next best route.
Last updated 2026-10-15. Is this you? Ask for a correction.