Investors / United States / Sinai Partners
Sinai Partners
Venture capital · New York, NY, United States · North America
Sinai Partners is an early-stage venture fund that backs founders building transformative technologies. It maintains collaborative relationships with academics, accelerators, and domain experts across the globe to give founders access to a network.
Invests inFintechAI & Machine LearningSpace & Defense
In its own wordsroboticsquantum computingcompute architectureenergyinternet of thingsbiotech
Your fit with Sinai Partners
Four questions about your startup
See how your round matches what it backs, point by point.
Or find every investor that fitsSinai Partners lists 16 checked portfolio companies on its own site. Its largest themes are Fintech (20%), AI & Machine Learning (20%) and Space & Defense (16%). 78% of its companies are based in United States. It invests most often alongside Vine Ventures, Andreessen Horowitz and General Catalyst.
No funding round on record names Sinai Partners yet, so the figures come from its portfolio page.
Round figures show recent activity, not Sinai Partners' whole history. Rounds on record name 0 companies; its own site lists 16. 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.
Investment themes
share of its checked companiesThis firmAll checked companies
Show as a table
| This firm | All checked companies | |
|---|---|---|
| Fintech | 20% | 12% |
| AI & Machine Learning | 20% | 18% |
| Space & Defense | 16% | 3% |
| Healthcare & Biotech | 12% | 15% |
| E-commerce & Marketplaces | 8% | 6% |
| Real Estate & Construction | 8% | 3% |
| Enterprise Software | 8% | 8% |
| Legal & Compliance | 4% | 2% |
Invests most often with
firms sharing its portfolio companiesShow as a table
| Share | |
|---|---|
| Vine Ventures | 6 |
| Andreessen Horowitz | 4 |
| General Catalyst | 3 |
| SV Angel | 3 |
| Tribe Capital | 3 |
| Union Square Ventures | 3 |
| 137 Ventures | 2 |
| A-Star Partners | 2 |
Investor profile
percentile among all firmsShow as a table
| Measure | Percentile of all firms | Value |
|---|---|---|
| Portfolio size | 42th | 16 companies |
| Recent activity | 46th | 0 rounds in 12 months |
| Early stage | 54th | 0% of entries at pre-seed or seed |
| Evidence | 52th | 0% of companies confirmed by a round |
| Sector focus | 17th | 20% in its largest sector |
| Reach | 58th | 3 countries |
Its portfolio companies
where they are based, and what their own sites showSite status
- Site answers1594%
- No longer answers00%
- Points to another company16%
- 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 Sinai Partners head to head
portfolio size, rounds, entry stages, themes and the companies both backThree or more firms at once: portfolio overlap.
Portfolio
16 companies checked against their own sites| Company | What it does | Themes | First round with it | Evidence |
|---|---|---|---|---|
| Addi provides a payment method that allows customers to buy now and pay later in installments without using credit cards or paperwork | FintechE-commerce & Marketplaces | Funding round | ||
| Anduril Industries specializes in advanced autonomous systems for defense and commercial mission sets. | AI & Machine LearningAI & Machine Learning | Portfolio page | ||
| Carta provides an end-to-end suite for managing private capital, including equity management, fund administration, and legal operations. | FintechLegal & Compliance | Portfolio page | ||
| Compass is a real estate website for buying, renting, and selling homes, featuring property listings and agent search. | Real Estate & Construction | Portfolio page | ||
| Portfolio page | ||||
| The company provides a customer service platform powered by AI for teams and agents to work together. | AI & Machine LearningSpace & Defense | Portfolio page | ||
| Hippo provides home insurance services, including quotes and policy selection from various carriers. | FintechReal Estate & Construction | Portfolio page | ||
| MANTL provides account origination software for banks and credit unions | FintechSpace & Defense | Portfolio page | ||
| OkCredit provides a digital ledger app for businesses to manage credit and payments | FintechE-commerce & Marketplaces | Portfolio page | ||
| Piñata Farms provides a meme generator and maker for creating video and image memes. | Enterprise SoftwareMedia & Entertainment | Portfolio page | ||
| Portfolio page | ||||
| The company provides online access to various health treatments, including weight loss, sexual health, fertility, hair, and skin products, often using FDA-approved medications. | Healthcare & Biotech | Portfolio page | ||
Healthcare & Biotech | Portfolio page | |||
| The company provides a platform for accessing and managing satellite imagery and geospatial data. | AI & Machine LearningSpace & Defense | Portfolio page | ||
| Unqork develops an AI-first enterprise application development platform | Enterprise SoftwareAI & Machine Learning | Portfolio page | ||
| Varda Space Industries processes materials in orbit in microgravity and returns them to Earth, offering services for government reentry testing and biopharma research. | Space & DefenseHealthcare & Biotech | Portfolio page |
About this data
site last read 5 Nov 2026- Site
- sinaipartners.com
- Last read
- 5 Nov 2026
- Watching since
- 5 Nov 2026
- Companies checked
- 16
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 Sinai Partners' profile as data
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