Temporal, which builds open-source software to ensure “durable execution” of code, raised a $300M Series D at a $5B valuation, up from $2.5B in October 2025
Software startup Temporal has raised $300 million in a funding round led by Andreessen Horowitz, valuing the company at $5 billion …
Context & Ripple Effects
Temporal’s financing history shows a progression from its Series A for stateful microservices orchestration to a $103M Series B for its open-source cloud application service.
The company then raised a $146M Series C at a $1.72B post-money valuation in 2025. The new round materially extends that funding arc and places Andreessen Horowitz at the center of Temporal’s next phase.
First-order effects
- Temporal gains $300M of additional capital and a $5B valuation, giving it a substantially larger balance-sheet cushion than in its prior disclosed rounds.
- Andreessen Horowitz becomes the lead investor in this round, deepening its financial exposure to Temporal’s open-source software platform.
Second-order effects
- The valuation reset raises the financing benchmark for other companies selling orchestration and reliability tooling around cloud applications, particularly those pairing open-source adoption with commercial operations.
- Temporal can use its larger capital base to compete more aggressively for engineering talent and enterprise deployments, increasing pressure on smaller infrastructure vendors with less access to late-stage funding.
Third-order effects
- If follow-on funding continues to favor established open-source infrastructure companies, the category may consolidate around vendors able to convert developer adoption into durable commercial relationships.
- The round reinforces a broader split in infrastructure software: widely adopted projects can attract large private rounds, while rivals without comparable distribution or capital may face tighter paths to scale.
The trend: Late-stage investors are concentrating larger checks in proven open-source infrastructure platforms that aim to turn developer adoption into enduring enterprise businesses.