Complete funding guide for deep tech entrepreneurs in Connecticut. Find 13 VC funds, 6 accelerators,3 angel networks, and 3 grant opportunities.
The deep tech startup ecosystem in Connecticut has experienced remarkable growth, with $443M in funding across 236 deals in 2026.This represents 33% year-over-year growth compared to the previous year, positioning Connecticutas a emerging market fordeep tech innovation.
The average funding round size of $3M reflects strong investor confidence in Connecticut-based deep tech startups. Competition levels are currently moderate, with 13 active VC funds specifically targeting this sector.
Connecticut offers a concentrated deep tech ecosystem with specialized talent
Strong government support for deep tech innovation and R&D tax incentives
Access to leading universities and research institutions in the region
Lower operational costs compared to traditional tech hubs like San Francisco
seed stage focus • 67 portfolio companies
series-a stage focus • 35 portfolio companies
seed stage focus • 24 portfolio companies
series-b stage focus • 27 portfolio companies
series-b stage focus • 31 portfolio companies
series-b stage focus • 55 portfolio companies
series-b stage focus • 54 portfolio companies
series-a stage focus • 43 portfolio companies
seed stage focus • 38 portfolio companies
series-a stage focus • 51 portfolio companies
seed stage focus • 33 portfolio companies
series-b stage focus • 25 portfolio companies
series-b stage focus • 34 portfolio companies
📍 Connecticut
📍 Connecticut
📍 Connecticut
by Connecticut Innovation Agency
Deep Tech startups based in Connecticut
by Connecticut Innovation Agency
Deep Tech startups based in Connecticut
by Connecticut Innovation Agency
Deep Tech startups based in Connecticut
Strong funding activity as VCs deploy fresh capital from annual fund raises
Peak investment period with increased deal velocity and accelerator demo days
Moderate activity as partners focus on portfolio company support during summer
Year-end push to deploy remaining capital and close pending deals
Deep Tech startup funding in Connecticut is moderate, with 13 active VC funds and 6 accelerator programs competing for deals. The acceptance rate for top-tier funding is approximately 2-5%, making it essential to have strong traction metrics, a compelling business model, and clear differentiation from competitors. Success factors includeDeep expertise in deep tech domain, Strong technical team with proven track record, Clear market validation and customer traction.
Deep Tech startups in Connecticut raise an average of $3M per funding round, based on 236 deals completed in 2026. This represents 33% year-over-year growthcompared to the previous year. Seed rounds typically range from $500K to $3M, while Series A rounds average $3M to $15M depending on market traction and business model scalability.
Top deep tech accelerators in Connecticut report success rates of 75-85% for follow-on funding, with program lengths ranging from 12-16 weeks and equity terms of 4-7%. The most successful programs focus ondeep-tech and startup-growthand provide extensive mentor networks, investor connections, and post-graduation support lasting 2+ years.
Connecticut offers several unique advantages for deep tech startups: Connecticut offers a concentrated deep tech ecosystem with specialized talent, Strong government support for deep tech innovation and R&D tax incentives, and Access to leading universities and research institutions in the region. The local ecosystem includes 13 specialized VC funds, 3 angel networks, and 3 grant programs specifically supporting deep tech innovation.
The optimal fundraising months in Connecticut are February, March, May, when investor activity peaks and deal velocity increases. Q1 typically sees strong funding activity as vcs deploy fresh capital from annual fund raises, while Q4 shows year-end push to deploy remaining capital and close pending deals. Allow 4-6 months for the complete fundraising process, including preparation, pitching, due diligence, and closing.
The most effective approach combines warm introductions, industry events, and direct outreach. Start by leveraging your network for introductions to the 13 active VC funds in Connecticut. Join relevant deep tech meetups, attend pitch competitions, and participate in accelerator demo days. Angel networks like Connecticut Deep Tech Angels host regular investor meetings and can provide valuable early-stage funding and mentorship.
Last updated: 2/20/2026 | Data aggregated from 13 VC funds, 6 accelerators, and 3 angel networks |About our methodology