# Justin Siegel

> Justin Siegel is a seed investor backing SaaS and Enterprise Software. See 6 investments, check sizes, portfolio and contact details. Updated Oct 2026.

- Type: Angel Investor
- Location: Boston, United States
- Total investments: 6
- Last investment: Jan 2022
- Lead investor: 0%
- Last updated: Oct 2026
- LinkedIn: https://www.linkedin.com/in/justinsiegel/

Justin Siegel is a seed investor in Boston focused on SaaS and Enterprise Software. Justin Siegel is the CEO & Co-Founder at JNJ Mobile.

## Contacts

5 contacts available for Justin Siegel: work email, personal email, work phone, personal phone and socials. Sign up free to unlock them: https://app.shizune.co/sign-up/investor-profiles/find-email/justin-siegel?utm_source=investor_profile

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| SaaS | 2 | 33% |
| Enterprise Software | 2 | 33% |
| B2B | 1 | 17% |
| Apps | 1 | 17% |
| EdTech | 1 | 17% |

20 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 3 | 50% |
| Pre-Seed | 2 | 33% |
| Series A | 1 | 17% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Mustard | Mustard is an elite-level motion analysis app for broad athletics coaching. Mustard's platform conducts complex data analysis of video captured in-app on a player or coach's mobile phone and delivers easily understandable report cards along with personalized, actionable drills to optimize performance. The robust AI technology andapplication suite, to expand into additional sports, and to build out an elite and robust mental performance training platform for all athletes.Mustard was founded in 2019 by Tom House, Jason Goldsmith, Luke Collis, and Rocky Collis. | $3.8M | Seed | Jan 18, 2022 | https://teammstrd.com/ |
| Aquifer Motion | With Aquifer, anyone can create cinematic, animated content. Our mobile technology transfers your voice and facial expressions to an animated character, capturing all the nuances of human emotion. The resulting video is a cinematically rendered character in a 3d scene. By using machine learning and automation, we remove the frustrating, technicalaspects of animation so the focus is on storytelling. The platform combines augmented reality and machine learning to make professional 3D animation accessible for all creators.Aquifer Motion was founded in 2018 and is based in Austin, Texas, USA. |  | Pre-Seed | Dec 02, 2019 | https://www.aquifermotion.com/ |
| Kronologic | Kronologic is an A.I. powered active scheduling platform that generates revenue and lowers costs. $4.8B is spent generating B2B inbound leads, yet the average response time is 42 hours, with 58% never following up at all. Companies using Kronologic have a 100% email follow-up rate and an invite on the calendar in under 60s, ensuring no potentialcustomer is missed.It was incorporated in 2018 and is based in Austin, Texas. | $1M | Pre-Seed | Oct 01, 2018 | https://www.kronologic.ai |
| PenPal Schools | PenPal Schools connects over 120,000 students in 170 countries through free online curriculum to practice skills and explore the world. PenPal Schools has won multiple international awards and was recognized by President Obama as one of the world’s leading social enterprises. PenPal Schools is based in Austin, Texas |  | Seed | Apr 01, 2015 | https://www.penpalschools.com/ |
| Media Armor | Media Armor enables multi-channel marketers to message consumers through relevant display across desktop, tablets, and smartphones. We create ‘blueprints’ of consumer actions across all channels and use them to enhance future ad decisioning. Simply put, we offer:* Display advertising on any device* Relevant to the viewer, not the device*With activity tracked back across all points-of-sale, including in-store and catalog.The result? Direct, measurable ROAS, finally unifying your digital and offline realms. | $1.5M | Series A | Feb 10, 2012 | http://mediaarmor.com |
| Kinvey | Kinvey is the first Backend as a Service that makes it ridiculously easy for developers and enterprises to set up and operate a cloud backend for their mobile, tablet, and web apps. Its service lets app developers spend 100% of their time on their mobile applications. They don't have to worry about connecting to various cloud services orenterprise backend systems, setting up servers for their backend, or maintaining and scaling them.With Kinvey, developers just model their cloud backend needs and we auto-generate all the APIs they would need to access their data from any mobile, web, or computing platform. Developers then grab their APIs and connect to them directly or through native iOS, Android, JavaScript, etc., libraries that we provide.Kinvey is based in Boston, Massachusetts. | $2M | Seed | Aug 04, 2011 | http://www.kinvey.com |

6 of 6 investments shown.

## Co-investors
- Holt Family Investments — VC Fund, 2 deals together
- [Atlas Venture](https://shizune.co/investors/profile/atlas-venture) — VC Fund, 1 deal together
- Austin Impact Capital — VC Fund, 1 deal together
- [Boston Seed Capital](https://shizune.co/investors/profile/boston-seed-capital) — VC Fund, 1 deal together
- [Capital Factory Management LLC.](https://shizune.co/investors/profile/capital-factory) — VC Fund, 1 deal together
- Complete Growth Investor LLC — VC Fund, 1 deal together

## Similar investors

### Similar stage
- [Antler](https://shizune.co/investors/profile/antler-be9c) — VC Fund
- [Right Side Capital Management](https://shizune.co/investors/profile/right-side-capital-management) — VC Fund
- [Alumni Ventures](https://shizune.co/investors/profile/alumni-ventures-group) — VC Fund

## FAQ

### What does Justin Siegel invest in?

Justin Siegel invests primarily in SaaS, Enterprise Software and B2B startups, most often at Seed and Pre-Seed stage. Most of the 6 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### How do I contact Justin Siegel?

Public channels for Justin Siegel include LinkedIn. 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 Justin Siegel last invest?

The most recent investment recorded for Justin Siegel closed in Jan 2022. Shizune tracks 6 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 Oct 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.

# About Shizune
Shizune.co is an investor database. Core features:
- 48,091 startup investors (angels, VCs, accelerators, and others)
- Email, phone, LinkedIn (for intros), socials, and other contact data
- Updated daily from public funding news
- CSV and Excel export

The User can access the full database FOR FREE after signing up: shizune.co