Dellfer
The business, the turning points, and the decisions behind them.
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Sections to complete：02 · 05
01 / WHAT IT BUILT
What the company did
Dellfer was a San Mateo-based IoT and automotive cybersecurity company founded in 2016. Its ZeroDayGuard product gave device makers and DevOps teams compile-time execution-integrity protection against zero-day attacks on connected cars and IoT devices, with cloud dashboards for monitoring. DENSO first invested in 2018, led the company's $8 million Series A in October 2021, and signed a joint development agreement in 2019. In January 2025, Option3's Enigma platform agreed to acquire Dellfer to expand its zero-trust cybersecurity platform.
02 / FAILURE REASONS
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03 / EVENT HISTORY
Events in the structured record
- Company founded
Dellfer is founded in San Mateo to build cybersecurity against zero-day attacks for connected vehicles and IoT devices.
- Funding round
DENSO makes its first investment in Dellfer during the seed round and later signs a joint development agreement in 2019.
- Peak funding round
In October 2021, DENSO leads Dellfer's $8 million Series A round.
- Acquisition
In January 2025, Enigma, the zero-trust platform of cybersecurity investor Option3, agrees to acquire Dellfer, with closing expected by the end of Q1 2025.
04 / CONTEMPORARY REBUILD ASSESSMENT
Difficulty of rebuilding this project today
Material for this section is being gathered and checked. It will appear here once ready.
Overall assessment: Not completed
05 / CAUSAL CHAIN / AFTERMATH
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