Corelight announced a $150 million Series E on April 30, 2024. Accel led the round, with strategic participation from Cisco Investments and CrowdStrike Falcon Fund. The company said it would use the funding to advance AI-driven security innovation, cloud-native security, and data partnerships. The announcement did not disclose a valuation or the company’s cumulative funding total.
What Corelight announced
The financing was a Series E investment announced on April 30, 2024. Accel led it; Cisco Investments and CrowdStrike Falcon Fund also participated. The announcement described their participation as strategic but did not state how much each investor contributed or what ownership stakes they received. Corelight’s funding announcement is the source for the round’s terms.
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Corelight also reported more than 40% year-over-year growth in annual recurring revenue (ARR) and 300% year-over-year growth in AI- and SaaS-driven NDR solutions. Both figures are the company’s own claims in the release; it did not provide audited support, detailed calculations, or a precise comparison period. They should not be read as independently verified market statistics.
What Corelight does
Corelight describes itself as an open-core security company founded by the creators of Zeek, an open-source network security monitoring technology. Its product line includes sensors for virtual, software, cloud, and physical environments, with insights from Zeek and Suricata and proprietary capabilities such as VPN, encrypted-traffic collection, and packet capture. These are company descriptions in its About Corelight materials.
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- Compact and Efficient Design: The FortiGate 40F is designed for small to mid-sized businesses and enterprise branch offices, featuring a compact, fanless desktop form factor that ensures quiet operation and minimizes space usage.
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The company positions its Open NDR Platform as a source of network evidence for security operations, cloud visibility and detection, incident response, and integrations with platforms such as next-generation SIEM. NDR means network detection and response. In practical terms, the platform’s stated role is to help security teams analyze activity on networks and use that information in their broader security workflows.
How the investors described the round
- Accel: Led the financing. Partner Arun Mathew cited enterprise traction, open-source technology, and customer response as reasons for investing.
- Cisco Investments: Participated strategically. Vice president Janey Hoe linked visibility across hybrid and multicloud environments with customer security needs.
- CrowdStrike Falcon Fund: Participated and said Corelight’s Open NDR data adds context to Falcon platform telemetry and supports a next-generation SIEM strategy.
These are statements from the company and investors, not independent evaluations of Corelight’s performance. CEO Brian Dye said Corelight uses network data to provide what he called “ground truth evidence” of adversarial movement. In a separate post on the announcement, “Fuel for Security AI”, Dye described the investments as “not as a victory but as an obligation.”
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- HARDWARE PLUS SECURITY SERVICES: FortiGate-60F Firewall Appliance bundled with 1 year of FortiCare Premium and FortiGuard Unified Threat Protection.
- UNIFIED THREAT PROTECTION (UTP): Secures against advanced online threats with comprehensive web filtering and anti-botnet technologies.
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- RELIABLE CUSTOMER SUPPORT: FortiCare Premium ensures high-quality support and service continuity.
- EFFECTIVE PROTECTION: Employs advanced filtering technologies to safeguard against sophisticated threats.
What the funding was intended to support
Corelight said it planned to accelerate AI-driven security innovation, cloud-native security capabilities, and data-fusion partnerships with cybersecurity platforms. Those were intended uses of the proceeds at the time of the announcement; the release does not establish that a particular later product or partnership shipped as a result.
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- 【Up to 1100 Mbps VPN Speed 】 Hardware-accelerated WireGuard and OpenVPN-DCO deliver up to 1100 Mbps VPN throughput, over 3× faster than Brume 2 for smooth remote access and file transfers.
- 【Three 2.5G Ports & Multi-WAN】Tri-port 2.5GbE design with flexible WAN LAN configuration supports multi-gigabit wired setups, dual-ISP Multi-WAN and failover to keep home and SOHO networks online.
- 【Stealth VPN Obfuscation】VPN obfuscation disguises VPN traffic as regular HTTPS, helping you evade blocking, bypass restrictive networks and maintain stable, private connections.
- 【DPI protection】Deep Packet Inspection with visual dashboards blocks adult/gambling/malicious sites, while SQM and QoS prioritize gaming, calls, and video when bandwidth is tight
- 【OpenWrt & USB 3.0 Expansion】OpenWrt with 1GB DDR4 and 8GB eMMC lets you install plugins and build VPN, ad-blocking or NAS, while USB 3.0 Type‑C connects high-speed storage or 4G/5G dongles
What the announcement does not disclose
- Valuation: Not stated in the company’s release.
- Total funding raised: The release does not give a cumulative funding figure.
- Investor contributions and ownership: The amount each participant invested and any resulting ownership stakes are not stated.
- Growth calculation details: Corelight did not publish audited support, detailed calculations, or an exact comparison period for its reported growth figures.
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