Jean Sini
Angel Investor · at Irregular Expressions
New York, United States
Jean Sini (born July 20, 1973) is a New York- and San Francisco-based investor. Jean is General Partner at Partech Partners. Previously, Jean was Chief Technology Officer at real estate startup Cadre. Before that, he was cofounder and Chief Technology Officer of Fountain, started in 2013 with Mint.com founder Aaron Patzer, and sold to Porch.com in2015. He is also an investor in and advisor to early stage startups, including Boxbee, Canva, Treasure Data, FieldWire, People.ai, ProdPerfect. He was previously CTO at One Kings Lane, and earlier Vice President of Data Aggregation Engineering at Mint.com, acquired by Intuit for $170m in November 2009. In 2005 he co-founded and was CTO at Activeweave, sold to TwelveFold Media in April 2008.
- Total investments:
- 11
- Last investment:
- Lead investor:
- 18%
Last updated:
For AI agents: llms.txt
Industries Jean Sini invests in
Stages Jean Sini invests in
Countries Jean Sini invests in
Round sizes
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Round size
- Seed
- $2.6M–$17M
- Series B
- $24M–$30M
Investment Focus
Industry
- Software 6 (55%)
- Artificial Intelligence 5 (45%)
- Machine Learning 3 (27%)
- SaaS 2 (18%)
- Big Data 2 (18%)
Stage
- Seed 7 (64%)
- Series B 2 (18%)
- Pre-Seed 1 (9%)
- Series A 1 (9%)
Country
- United States 8 (73%)
- Israel 1 (9%)
- Australia 1 (9%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| Modiqo is developing the infrastructure required for dependable AI agent workflows. Modiqo enables teams to decrease human labor, increase consistency, and scale workflows with confidence. | $3M / Pre-Seed / May 28, 2026 | ||
| Actual AI analyzes productivity and engagement data to automate performance reviews for software teams. | $3.2M / Seed / Sep 29, 2025 | ||
| Airfold is designed to easily ingest your batch and streaming data, join/aggregate it with SQL, and publish the results as APIs for other teams to access it. Without worrying about managing infrastructure or complex integrations. | $4M / Seed / Aug 01, 2024 | ||
| Objective, Inc. was created for teams like yours, who care about business outcomes over convoluted pipelines, and customer delight over endless tinkering. Our AI knows what users are looking for, even when the true meaning of your data is buried deep inside pixels and paragraphs. | $13M / Seed / Oct 18, 2023 | ||
| Memfault provides solutions for firmware delivery, monitoring, and diagnostics to consumer electronics businesses. The company takes care of software updates and diagnostics, so that the user can focus on what makes its products unique. Memfault’s SDK works with existing hardware. Monitor and deploy a firmware to low level devices via Bluetooth,Wi-Fi, USB, or proprietary protocol.Memfault is based in San Francisco, California. | $24M / Series B / Jan 24, 2023 | ||
| Product Science increases product metrics for mobile applications and helps apps work faster by providing insights into key performance issues that impact user experience. It analyzes the code and actual runtime data to pinpoint performance issues. Its AI enables them to do it more efficiently by providing unique insights for data visualizations tohelp mobile developers identify the problem right away. The company's integrated development environment tools and plugins display video recordings of apps alongside performance traces, providing insights into what's going on behind the screen.Product Science was founded in 2021 and is based in Los Angeles, California. | $17M / Seed / Mar 14, 2022 | ||
| DevOps-as-a-Service is our unique take on continuous delivery that aims to do more than deploy a single microservice to a container platform. Armed with an understanding of your system's dependency graph, Architect automates the deployment of distributed services, configures secure network policies, and enables on-demand stacks across all ofyour environments. DevOps-as-a-Service unlocks the potential of cloud-native developers and by supporting our over-worked and under-staffed DevOps teams. | $5M / Seed / Feb 15, 2022 | ||
| Memfault provides solutions for firmware delivery, monitoring, and diagnostics to consumer electronics businesses. The company takes care of software updates and diagnostics, so that the user can focus on what makes its products unique. Memfault’s SDK works with existing hardware. Monitor and deploy a firmware to low level devices via Bluetooth,Wi-Fi, USB, or proprietary protocol.Memfault is based in San Francisco, California. | $8.5M / Series A / Apr 01, 2021 | ||
| The Alectio platform is the first full-stack, end-to-end, ML-driven self-serve DataPrepOps platform® enabling ML teams to prepare, curate, annotate, manage, version and visualize their training data in a few clicks, in near-real-time and quasi-automated manner.Alectio's proprietary technology is based on the fundamental belief that ML modelscan be trained with the same (sometimes better) performance with just a fraction of the data (which means lower labeling, storage and compute costs, and eventually the possibility of training on the edge). Data Scientists wrap their regular model and raw data with the Alectio's SDK and the Alectio curation engine guides the training process strategically so that the model gets trained on the most informative data; they'll never have to spend a minute on data preparation again!We're neither a labeling company nor an MLOps company: we're building a new category providing the entire workflow to prepare data during training which allows ML experts to build models and datasets simultaneously, reducing time to market, and a new training paradigm that will lead orgs to actual AI profitability.Alectio uncovers the smart data inside your big data, unlocking model performance and saving machine learning experts both time and money. | $2.6M / Seed / Feb 04, 2021 | ||
| Securing the clinical environment requires a coordinated approach as IT, IoMT, IoT, and BAS, also known as Cyber-Physical Systems (CPS) converge, and the threat of bad actors exploiting vulnerabilities across new and old infrastructure increases.A comprehensive CPS cybersecurity program requires detailed knowledge of every device, proprietaryprotocols, and an understanding of medical workflows. With a network with hundreds of different device types, thousands of devices from different manufacturers, and a mix of protocols and operational parameters, it can be overwhelming.Claroty has redefined cyber-physical systems (CPS) protection with an unrivaled industry-centric platform built to secure mission-critical infrastructure. The Claroty Platform provides the deepest asset visibility and the broadest, built-for-CPS solution in the market comprising exposure management, network protection, secure access, threat detection, and operational efficiency.Backed by award-winning threat research and a breadth of technology alliances, The Claroty Platform enables organizations to effectively reduce CPS risk, with the fastest time-to-value and lower total cost of ownership.Claroty is deployed by hundreds of organizations at thousands of sites globally. The company is headquartered in New York City and has a presence in Europe, Asia-Pacific, and Latin America. To learn more, visit claroty.com. | $30M / Series B / Sep 15, 2020 | ||
| See all 11 investments → | |||
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FAQ
What does Jean Sini invest in?
Jean Sini invests primarily in Software, Artificial Intelligence and Machine Learning startups, most often at Seed and Series B stage. Most of the 11 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.
What is Jean Sini's check size?
Jean Sini typically joins rounds of $2.6M–$17M at Seed and $24M–$30M at Series B. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Jean Sini participates in.
How do I contact Jean Sini?
Public channels for Jean Sini include LinkedIn, X (Twitter) and the website linked on this profile. For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.
When did Jean Sini last invest?
The most recent investment recorded for Jean Sini closed in May 2026. Shizune tracks 11 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly.
Is Shizune's investor data accurate?
Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Sep 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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