Yonatan Appel
Israeli former Check Point, Imperva and Microsoft engineer who served in a technological unit of the IDF Intelligence Corps and co-founded the connected-vehicle security company Upstream Security
| Yonatan Appel
| |
|---|---|
| Image |  Appel, from the Upstream Security website |
| Nationality | Israeli |
| Occupation | Software engineer; company executive |
| Known for | Co-founder and chief technology officer of Upstream Security |
| Education | Open University of Israel (BA); Tel Aviv University (LLB) |
Yonatan Appel is an Israeli software engineer who co-founded the connected-vehicle cyber-security company Upstream Security in 2017 with Yoav Levy, and is its chief technology officer.[1][2] According to the company's website, "He also served in an elite technological unit in the IDF Intelligence Corps" (Intelligence Corps).[2]
Military service and career
The company's 2017 seed-funding announcement said that "Upstream Security was founded by security veterans Yoav Levy and Yonatan Appel in 2017".[1] It said that "Mr. Appel, CTO, specializes in application security and network security, with 18 years' experience, including in Check Point, Imperva, and Microsoft. He served in a technological unit in the IDF's Intelligence Corps" (Check Point; Imperva; Microsoft).[1] The unit is not named.
Education
Upstream's website says that "Yonatan holds a BA in Computer Science from the Open University of Israel (cum laude) and an LLB from Tel Aviv University" (Open University of Israel; Tel Aviv University).[2]
Upstream Security
Upstream's $2 million seed round in 2017 was led by Glilot Capital Partners.[1] In August 2021 it announced a $62 million Series C led by Mitsui Sumitomo Insurance, bringing its total funding to $105 million.[3]
See also
- Upstream Security
- Yoav Levy
- Cyber and tech firms founded by ex Unit 8200 or occupation forces veterans
Notes
- ↑ 1.0 1.1 1.2 1.3 Upstream Security and Glilot Capital Partners, Upstream Security Raises $2M to Protect Connected and Autonomous Fleets PR Newswire, 26 June 2017, accessed 10 November 2026.
- ↑ 2.0 2.1 2.2 Upstream Security, Company - Get to Know Our Leadership Team Upstream, accessed 11 November 2026.
- ↑ Upstream Security, Upstream Security Raises $62M in Series C Financing Round Upstream, 24 August 2021, accessed 10 November 2026.