Organization · Micro VC
SBXi
SBXi is a university-affiliated investment fund based in Cambridge, Massachusetts, focused on supporting MIT alumni founders. It provides funding through checks ranging from $10,000 to $1 million, primarily for pre-seed to Series A stages.
Overview
What SBXi does
What SBXi is
SBXi is a university-affiliated investment fund based in Cambridge, Massachusetts, focused on supporting MIT alumni founders. It provides funding through checks ranging from $10,000 to $1 million, primarily for pre-seed to Series A stages.
How it participates in the startup ecosystem
The current public profile supports funder capabilities. Each capability below is shown separately so organization identity and role-specific information do not get conflated.
Operational profile
Organization status and context
Organization status describes the entity itself. Funding and program availability appear within the relevant capability profile.
- Operational status
- Active
- Organization type
- Micro VC
- Structured capabilities
- Funder
- Last reviewed
- March 27, 2026
Official channels
Find SBXi elsewhere
Open the official website or a supported primary organization account.
Capability profile
SBXi as a funder
Investment thesis
SBXi invests exclusively in MIT alumni founders, providing capital and support to drive innovation and impact across various sectors.
Focus narrative
SBXi focuses exclusively on investing in startups founded by MIT alumni. The organization provides funding through checks ranging from $10,000 to $100,000 for SAFE notes and $100,000 to $1 million for priced rounds with a qualifying term sheet. This dual-tier check structure allows for flexible engagement with early-stage companies, empowering founders to create significant innovations across multiple sectors.
Value beyond capital
SBXi provides not only capital but also valuable connections to a network of top-tier venture capital firms, facilitating warm introductions for follow-on funding. The organization leverages its affiliation with MIT to support founders in navigating the startup ecosystem effectively.
Terms and economics
- Typical check
- $10,000–$1,000,000
- Sweet spot
- $500,000
Focus and fit
- Stages
- Pre-seed · Seed · Series A
- Regions
- United States
Availability
- Currently deploying
- Yes
Portfolio and track record
- Recorded portfolio count
- 7
Portfolio context
Notable portfolio companies include: Centaur.ai: Combines human and AI decision-making in medical contexts. Simple AI: Builds tools to assist founders in learning and connecting effectively. Nowadays: A product management company optimizing customer relationships and cost management. Avoca: An AI engine designed to enhance revenue across various channels. Cambridge Terahertz: Utilizes terahertz wave technology for security and loss prevention. Lightmatter: Develops technology to advance computational capabilities. Polygence: Offers research opportunities for high school students.
Common questions
What to know about SBXi
Upseed classifies SBXi under the Micro VC organization type. Its current public profile includes funder capabilities.
Source and update disclosure
Know what this page is based on
Source basis
Public organization and program material, official websites, and structured Upseed records.
Last reviewed
March 27, 2026
Known limits
Capability profiles appear only when a structured public profile also contains decision-useful role evidence. Terms and availability can change.
Upseed is an independent guide. It is not affiliated with or endorsed by the organization described on this page.