Investors / United States / SBXi
SBXi
Venture capital · Cambridge, MA, United States · North America
SBXi is a fund that invests exclusively in founders who graduated from MIT. It writes $10K-$100K checks on SAFEs and $100K-$1M checks in priced rounds, matching the terms of a qualifying lead investor.
Your fit with SBXi
Four questions about your startup
See how your round matches what it backs, point by point.
Or find every investor that fitsSBXi lists 44 checked portfolio companies on its own site and is named in 5 funding rounds. Its most frequent entry is Seed, 80% of the companies with a known first round. Its largest themes are AI & Machine Learning (30%), Healthcare & Biotech (20%) and Industrial & Manufacturing (10%). 96% of its companies are based in United States. It invests most often alongside Y Combinator, E14 Fund and Creative Destruction Lab.
Counts come from funding rounds that name SBXi, complete from mid-2025: earlier rounds appear only when they were reported later. Round amounts and full round histories are on Fundup AI.
Round figures show recent activity, not SBXi's whole history. Rounds on record name 5 companies; its own site lists 44. Funding rounds are complete from mid-2025, so counts and the yearly trend undercount a firm that invested before then. The portfolio, themes and places come from its own site and are not affected.
Entry stage
share of companies by the stage of its first roundShow as a table
| Value | |
|---|---|
| Pre-seed | 0% |
| Seed | 80% |
| Series A | 20% |
| Series B | 0% |
| Growth | 0% |
Activity by year
rounds it joined, last 10 yearsShow as a table
| Total | Rounds it led | |
|---|---|---|
| '17 | 0 | 0 |
| '18 | 0 | 0 |
| '19 | 0 | 0 |
| '20 | 0 | 0 |
| '21 | 0 | 0 |
| '22 | 0 | 0 |
| '23 | 0 | 0 |
| '24 | 1 | 0 |
| '25 | 2 | 0 |
| '26 | 2 | 0 |
Investor profile
percentile among all firmsShow as a table
| Measure | Percentile of all firms | Value |
|---|---|---|
| Portfolio size | 79th | 43 companies |
| Recent activity | 69th | 2 rounds in 12 months |
| Early stage | 83th | 80% of entries at pre-seed or seed |
| Evidence | 55th | 2% of companies confirmed by a round |
| Sector focus | 53th | 30% in its largest sector |
| Reach | 42th | 2 countries |
Investment themes
share of its checked companiesThis firmAll checked companies
Show as a table
| This firm | All checked companies | |
|---|---|---|
| AI & Machine Learning | 30% | 18% |
| Healthcare & Biotech | 20% | 15% |
| Industrial & Manufacturing | 10% | 7% |
| Cybersecurity | 7% | 4% |
| Fintech | 6% | 12% |
| Real Estate & Construction | 6% | 3% |
| Enterprise Software | 3% | 8% |
| Education | 3% | 7% |
Invests most often with
firms sharing its portfolio companiesShow as a table
| Share | |
|---|---|
| Y Combinator | 13 |
| E14 Fund | 6 |
| Creative Destruction Lab | 3 |
| Soma Capital | 3 |
| A2D Ventures | 2 |
| Collaborative Fund | 2 |
| Dorm Room Fund | 2 |
| Good Growth Capital | 2 |
Its portfolio companies
where they are based, and what their own sites showSite status
- Site answers4398%
- No longer answers00%
- Points to another company12%
- Parked or sold domain00%
A site that stops answering three checks in a row is counted as no longer answering; that is not proof of closure. A site that points to another company is often an acquisition.
Co-investor network
who it backs companies with, and who they back togetherCompare SBXi head to head
portfolio size, rounds, entry stages, themes and the companies both backThree or more firms at once: portfolio overlap.
Recent portfolio activity
when companies last raised with SBXi| Date | Company | Stage |
|---|---|---|
| 15 Jun 2026 | Seed | |
| 3 Jun 2026 | Seed | |
| 4 Sept 2025 | Series A | |
| 19 Mar 2025 | Seed | |
| 16 Oct 2024 | Seed |
Round details for SBXi
Amounts, full round histories and every co-investor in SBXi's rounds are on Fundup AI. VCinfo covers investors and their portfolios.
Portfolio
44 companies checked against their own sites| Company | What it does | Themes | First round with it | Evidence |
|---|---|---|---|---|
| The company helps mines extract more copper from low-grade ores using engineered microbes. | Industrial & ManufacturingAI & Machine Learning | Portfolio page | ||
| Autonomous Cyber provides a platform for cybersecurity using machine intelligence and AI | CybersecurityAI & Machine Learning | Portfolio page | ||
| AeroShield develops and scales transparent silica aerogels for use in windows, doors, and skylights. | Industrial & Manufacturing | Portfolio page | ||
| Aidy helps people with inflammatory bowel disease stick to treatment plans and better communicate with care teams. | Healthcare & Biotech | Portfolio page | ||
| Almond Fintech optimizes cross-border foreign exchange transactions for corporate treasuries, money transmitters, and fintechs. | FintechFintech | Portfolio page | ||
| The company Amira develops and sells an automatic cooling pad for hot flash relief | Healthcare & BiotechConsumer | Portfolio page | ||
| Amplified Industries provides IoT well automation and oilfield monitoring solutions | Industrial & ManufacturingE-commerce & Marketplaces | Portfolio page | ||
| Apers provides an AI system for institutional real estate | Real Estate & ConstructionAI & Machine Learning | Portfolio page | ||
| Portfolio page | ||||
| Arini provides an AI receptionist for dentists to manage patient engagement and scheduling | Healthcare & BiotechAI & Machine Learning | Portfolio page | ||
| Aslan builds technology to overcome national security threats in the digital world | CybersecurityAI & Machine Learning | Portfolio page | ||
| Augmend Health captures the full biopsychosocial patient self-reported experience of complex chronic conditions before face-to-face visits with providers to enhance care quality, speed of care, and reimbursement compliance. | Healthcare & Biotech | Portfolio page | ||
| Aurora Medical Technologies is a preclinical stage company dedicated to advancing minimally invasive surgery with groundbreaking suturing technology | Healthcare & Biotech | Portfolio page | ||
| AutonomUS develops handheld medical robotics for image-guided interventions. | Healthcare & Biotech | Portfolio page | ||
| Basalt builds, launches, and operates dedicated autonomous remote sensing satellites for government and commercial enterprises. | AI & Machine LearningSpace & Defense | Portfolio page | ||
| Baseline provides sports facility and team management software | Legal & ComplianceReal Estate & Construction | Portfolio page | ||
| BlueShift develops and operates modular mineral-processing assets that combine on-site electrochemical reagent generation, intensified processing hardware, and intelligence software. | Industrial & ManufacturingAI & Machine Learning | Mar 2025Seed | Page + round | |
| Bunting Labs provides software for modern map digitization using AI tools | AI & Machine LearningEnterprise Software | Portfolio page | ||
| CassVita transforms cassava into various products, including fufu, flour, starch, and animal feed, and sells them to multinationals | Food & AgricultureFood & Agriculture | Portfolio page | ||
| Centaur provides expert data annotation for healthcare AI and other industries | Healthcare & BiotechAI & Machine Learning | Portfolio page |
About this data
site last read 5 Nov 2026- Site
- sbxi.com
- Last read
- 5 Nov 2026
- Watching since
- 5 Nov 2026
- Rounds since
- 16 Oct 2024
- Companies checked
- 44
Rates come from what VCinfo has observed since observation_start. Firms tend to remove companies that closed, so early rates understate reality. A company leaving a portfolio page does not mean it closed or exited. An unreachable site means our checks failed, nothing more.
Get SBXi's profile as data
Pull SBXi's portfolio, co-investors and changes through one API key or MCP, open every portfolio row, compare it with other firms, and get an email when it adds a company or files a fund.
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- Full listsEvery portfolio row and two-firm overlap
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- AlertsFollow 5 investors for portfolio and fund changes
$ curl -H "X-API-Key: YOUR_KEY" \
https://api.vcinfo.io/v1/firms/sbxi.com
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GET /v1/firms/sbxi.com/portfolio
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