Invest1 publisher2 min readPublished
Cylake raises $245 million on a note four months before its beta ships
The convertible note accounts for 84.5 percent of the $290 million Cylake has raised, and the product it funds is still a design-partner build with general availability promised for 2027. The next financing sets the conversion price.
The Investor · Invest desk
What happened
- Cylake said on Sept. 8, 2026 that it had raised $245 million through a convertible note, with Lightspeed Venture Partners, Picture Capital and Redpoint Ventures participating.
- The platform is being built to run entirely on premises or in private cloud environments, with customers retaining control of their data, infrastructure and operations.
- Lightspeed's Ravi Mhatre, a partner and co-founder of the firm, joins Cylake's board of directors as part of the financing.
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Why it matters
- decision Cylake has to reach a shipped product before the conversion price is settled, so the end-of-2026 beta date is the company's own negotiating position in the next financing.
- constraint The hiring the note funds is fixed cost carried against revenue that cannot begin at scale before the general availability year.
- exposure Almost all of the company's capital now sits in a single unpriced instrument whose return depends on a product still being built with design partners.
- precedent A nine-figure check placed between seed and beta sets the expectation that pre-product security platforms aimed at regulated and government buyers can raise at this size.
Convertible notes settle the price later. The money goes in as debt and converts into equity on terms a subsequent financing fixes, so none of the participants had to agree this month on what Cylake is worth [1]. The announcement does not disclose the note's conversion terms, a cap, or a valuation, and Rakesh Loonkar's quote refers to the person he has worked with for more than 30 years only as Nir [13].
Of the $290 million Cylake has raised, $245 million, or 84.5 percent, came in this one instrument [1]. It arrived about six months after a $45 million seed led by Greylock Partners in March 2026, at 5.4 times that seed's size [2][2]. Cylake expects a beta by the end of 2026 and full general availability in 2027 [3]. Measured from the Sept. 8 announcement, that is roughly four months to the beta and as much as sixteen to general availability [3].
The capital pays for product development and team growth [4]. The platform will run entirely on premises or in private cloud environments, with customers keeping control of their data, infrastructure and operations [5]. Cylake says that approach lets it work from a single, complete data foundation, avoiding the coverage gaps that create vulnerabilities [14]. The buyers it is built for are highly regulated commercial and government organizations, and the company is developing the product with a cohort of design partners [6][7].
"Most of the market has been slow to realize how AI and SaaS shifted the goalposts for enterprise cybersecurity. Cylake identified that gap early and is building the answer," said Ravi Mhatre, partner and co-founder at Lightspeed Venture Partners, who joins Cylake's board of directors [8][9].
Nine figures into a company with nothing shipped is capital underwriting a team and a date. Design partners willing to host an on-premises install are close to the only evidence there is until the beta ships [7], and Lightspeed took the board seat that comes with watching it [9]. The counter-thesis is the revenue curve. On-premises and private-cloud delivery into regulated and government buyers means every customer is an install inside someone else's environment [5], and $290 million of spending lands before the first renewal [2].
If the beta arrives inside 2026 and the design partners convert into paid deployments during the general availability year, the note holders bought a position ahead of a price [3]. If it slips, the money that follows comes in with the leverage, and the cap decides how much of the company the $245 million converts into [13].
What to watch
- A named design partner or a first paid deployment at general availability would put a revenue figure against the $290 million raised.
- Whether the beta lands inside 2026 or slides into the year Cylake has promised for general availability.
- Whether Cylake's next money comes in as a priced round, which would set the note's conversion terms, or as another note.