Upwind's $3.8 Billion Round Signals Cloud Security Still Commands Premium Valuations

Two deals this week offer a useful snapshot of where venture capital is still willing to write large checks. Upwind, an Israeli cloud security company, closed a $400 million Series C at a $3.8 billion valuation. Separately, Dulo, a San Francisco-based developer of AI models for engineering tasks, raised $130 million in seed funding. Together, the rounds total $530 million deployed across two companies at very different stages of maturity.

The scale of both deals matters more than the headline numbers suggest. Upwind's raise was led by Bessemer Venture Partners, with Canapi Ventures joining as a new backer. A notable feature of the round is the depth of insider participation. Cyberstarts, Greylock Partners, Craft Ventures, Salesforce Ventures, and Picture Capital all returned to fund the company again. That kind of repeat insider commitment, especially at a step-up to a $3.8 billion valuation, tends to signal internal conviction about growth metrics that outsiders cannot always see from the outside.

Dulo's seed round tells a different story about capital allocation at the earliest stage. A $130 million seed is unusually large by traditional standards, and it reflects how founder pedigree and AI positioning can compress the normal fundraising timeline. The round drew DST Global, Construct Capital, and Lowercarbon Capital, three firms with distinct investment theses, growth-stage scale for DST, infrastructure focus for Construct, and climate-adjacent capital for Lowercarbon, now converging on an AI engineering bet.

Why Cybersecurity Keeps Commanding Capital

Cloud security has remained one of the more resilient subsectors in enterprise software funding, even as broader software valuations have compressed from their 2021 peaks. Upwind's jump to a $3.8 billion valuation places it among the more richly valued private cybersecurity companies, and the involvement of Salesforce Ventures alongside pure-play VCs points to continued strategic interest from large enterprise platforms looking to secure partnerships or acquisition optionality down the line.

The thesis behind cloud security investment is straightforward. Enterprises are shifting workloads to multi-cloud and hybrid environments faster than their security tooling can keep pace. That gap creates durable demand for companies that can monitor, detect, and respond to threats across fragmented infrastructure. Upwind's positioning in this space, combined with its Israeli engineering roots, a region with a long track record of producing security talent and successful exits, gives the company a credible claim to category leadership.

Risk here is less about product-market fit and more about valuation discipline. A $3.8 billion mark is a significant step up, and later-stage investors will want to see revenue growth and net retention figures that justify the multiple before any exit event, whether that's an IPO or acquisition. Bessemer's decision to lead suggests the firm has underwritten those numbers carefully, but outside investors should treat this round as a signal of sector strength rather than confirmation of any specific valuation methodology.

Dulo's seed round sits in a different risk category entirely. Seed-stage AI companies with $130 million in funding face intense pressure to demonstrate product traction quickly, given the capital already deployed and the expectations that come with it. The involvement of DST Global, a firm historically associated with growth-stage rounds, at the seed stage is itself notable. It suggests either unusually high conviction in the founding team or a broader trend of growth investors moving earlier into AI deals to secure allocation before later rounds become competitive and expensive.

Construct Capital's participation adds an infrastructure lens to the deal. The firm typically backs companies building foundational technology rather than applications, which hints that Dulo's engineering AI model may be positioned as infrastructure for other AI-driven development tools rather than a standalone product. Lowercarbon Capital's involvement is less immediately obvious given its climate focus, though crossover investing into AI infrastructure has become increasingly common among specialist funds chasing sector-agnostic returns.

Both deals arrive against a backdrop of substantial AI-related dealmaking activity. Anthropic's recent IPO has been cited elsewhere as leading a $235 billion wave of AI dealmaking, and OpenAI's acquisition of a biotech startup earlier this month shows how AI capital is expanding into adjacent verticals beyond core software. Upwind and Dulo represent smaller pieces of that broader capital flow, but they illustrate how specific niches, cloud security and AI-native engineering tools, continue to attract outsized investor attention even as overall deal volume normalizes from the frenzied pace of prior years.

Investment Implications

For portfolio managers tracking enterprise software and AI infrastructure, these two rounds offer a clear signal: capital concentration remains the dominant theme. Rather than broad-based enthusiasm across software categories, investors are making targeted, high-conviction bets in areas with clear demand tailwinds, cloud security driven by infrastructure complexity, and AI engineering tools driven by developer productivity gains.

The insider-heavy structure of Upwind's round is worth monitoring as a template. When five existing investors return for a fourth or fifth round at a materially higher valuation, it often precedes either a strong public listing or an acquisition by a strategic buyer already embedded in the cap table, Salesforce Ventures being the obvious candidate here. Watch for follow-on signals from Salesforce specifically over the next 12 to 18 months.

For Dulo, the key metric to track will be usage and retention data once the company begins disclosing customer traction, likely within the next two to three quarters given the size of the seed round and the pressure that comes with it. A $130 million seed round sets a high bar. Investors allocating alongside DST Global and Construct Capital should expect a Series A within 12 months if the company is executing well, and any delay beyond that window would be a signal worth scrutinizing closely.