Carb-x is an accelerator. Based in Boston, Massachusetts, United States. Among the 7 companies in the known portfolio are Sandburst, Parkaze, Constant Therapy Health, CauseEDU, Downtyme and ESG Analytics AI.
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Investment focus
- Focus
- Digital HealthESG AnalyticsEdTechSemiconductors
Who to pitch at Carb-x
Carb-x portfolio companies (7)
- Sandburst
- Parkaze
- Constant Therapy Health
- CauseEDU
- Downtyme
- ESG Analytics AI
- OutStart
Co-investors
Funds that share portfolio companies with Carb-x.
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About Carb-x
The firm's listing covers sectors AI, Education, Hardware and Healthcare, and focus areas Digital Health, ESG Analytics, EdTech and Semiconductors; known deals cluster at Growth, Pre-Seed and Seed.
The team counts 5 people in our database. Michael Pratt (Managing Director), Phil Libin (Member of the Board of Overseers) and Ted C. (Professional Instructor / Marketing Analytics) are shown as the contacts to pitch.
Carb-x shares portfolio companies with 7 other investment firms, among them NTT Finance, Investor AB (investor-ab) and Accton Technology.
Frequently asked questions
What is Carb-x?
Carb-x is an accelerator based in Boston, Massachusetts, United States, with a known portfolio of 7 companies. The portfolio comes from public investment records rather than from the firm, so deals that never surfaced publicly are not in it.
What does Carb-x invest in?
Listed sectors include AI, Education, Hardware and Healthcare; listed focus areas include Digital Health, ESG Analytics, EdTech and Semiconductors. Those tags come from the portfolio attached to the firm, so they describe what has been backed rather than a stated mandate for what comes next.
What stage does Carb-x invest at?
The known deals of Carb-x include Growth, Pre-Seed and Seed rounds. Check that against your own round before reaching out: stage mismatch is the most common reason a well matched sector still goes nowhere.
Who should I pitch at Carb-x?
3 of the 5 people on file at Carb-x are listed as contacts for the firm. All 5 have their own profile page.
How do I contact Carb-x?
Any email address on file for the firm is masked on this page and readable inside RaiseHunt after you create an account. The 5 people attached to the firm have their own pages, each showing whether an address is on file for them.
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Data: RaiseHunt investor dataset · Snapshot 5 September 2026 · How this data is built · Report a correction or request removal