History of SentinelOne in Timeline

By Popular Timelines Editorial Team · Updated: February 16, 2026

SentinelOne is a cybersecurity company founded in 2013, headquartered in Mountain View, California, and led by CEO Tomer Weingarten. Employing around 2,800 people globally, it focuses on protecting personal computers, IoT devices, and cloud workloads through machine learning. Its platform leverages a heuristic model, including its patented behavioral AI, for threat detection and response. SentinelOne is AV-TEST certified, indicating its effectiveness in cybersecurity solutions.

2013: SentinelOne Founded

In 2013, SentinelOne was founded by Tomer Weingarten, Almog Cohen, and Ehud Shamir.

June 2019: SentinelOne Receives Series D Funding

In June 2019, SentinelOne received $120 million in a Series D funding round led by Insight Partners.

February 2020: SentinelOne Receives Series E Funding

In February 2020, SentinelOne received an additional $200 million in Series E funding, placing the company's valuation at about $1.1 billion.

2020: Funding Round Closed

In 2020, SentinelOne closed a funding round for $267 million, bringing its total valuation to $3.1 billion.

February 2021: SentinelOne Acquires Scalyr

In February 2021, SentinelOne announced the acquisition of Scalyr, a cloud-scale data analytics platform, for $155 million in cash and equity.

June 30, 2021: SentinelOne Completes Initial Public Offering

On June 30, 2021, SentinelOne completed its initial public offering on the NYSE, raising $1.2 billion and trading under the symbol S.

2021: Cybersecurity Sponsor of Aston Martin Cognizant F1 Team

Since 2021, SentinelOne has been the official cybersecurity sponsor of the Aston Martin Cognizant F1 Team.

March 2022: SentinelOne Acquires Attivo Networks

In March 2022, SentinelOne announced the acquisition of Attivo Networks, an identity detection and response technology company, for $616.5 million in cash and equity.

November 2023: SentinelOne Acquires Krebs Stamos Group

In early November 2023, SentinelOne acquired Krebs Stamos Group, founded by Chris Krebs and Alex Stamos, which was rebranded as PinnacleOne Strategic Advisory Group.

January 2024: SentinelOne Agrees to Acquire PingSafe

In January 2024, SentinelOne agreed to acquire PingSafe, valuing the company at over $100 million.

April 2025: Chris Krebs Resigns From SentinelOne

In April 2025, Chris Krebs resigned from SentinelOne after being targeted by the Trump Administration in an executive order.

August 2025: SentinelOne Acquires Prompt Security

In August 2025, SentinelOne announced a definitive agreement to acquire Prompt Security, an Israeli startup focused on securing AI in runtime, for an estimated $250 million. The acquisition extends SentinelOne's Singularity Platform.

September 2025: SentinelOne to Acquire Observo AI

In September 2025, SentinelOne announced its intention to acquire Observo AI, an AI-native real-time data pipeline platform. The transaction is expected to close in SentinelOne's third fiscal quarter of 2025.