Goldman Sachs Alternatives leads $240M Series E for AI software delivery platform Harness

Harness, the AI-native software delivery platform founded in 2017, has raised $240 million in a Series E round led by Goldman Sachs Alternatives, pushing its valuation to $5.5 billion. The round closed December 11, 2025, and splits into $200 million in primary capital plus a planned $40 million tender offering that lets existing investors cash out some chips.

What Harness actually does

Harness focuses on what the company calls the “outer loop” of software engineering. That covers everything that happens after a developer writes code: testing, security scanning, governance, compliance checks, and cost optimization.

The platform uses specialized AI agents, a proprietary Software Delivery Knowledge Graph, and enterprise orchestration tools to automate and govern that pipeline. Harness reported 128 million deployments processed in the past 12 months and $1.9 billion in customer cloud spend optimized over the same period. Its enterprise customers include United Airlines, Morningstar, Keller Williams, and National Australia Bank, all of which have reported measurable improvements in deployment efficiency.

The growth story Goldman is betting on

Harness is projected to surpass $250 million in Annual Recurring Revenue in 2025, representing more than 50% year-over-year growth. More than 1,000 enterprise customers and 1,200 employees across 14 offices sit behind that ARR figure.

Previous Harness backers include Menlo Ventures and IVP. Harness has also grown inorganically through strategic acquisitions of Traceable, a security platform, and Qwiet AI, adding capability layers in the security and AI-assisted code analysis spaces.

Why the timing is significant

AI code-generation tools have meaningfully accelerated how fast development teams produce code, creating more potential vulnerabilities, more deployment complexity, and more governance surface area for regulated industries like finance and aviation. Harness is positioning itself as the infrastructure layer that makes AI-accelerated development safe enough for enterprises that can’t afford outages or compliance failures.

The $5.5 billion valuation puts Harness at roughly 22 times projected 2025 ARR.

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