Temporal has raised $550 million in Series E funding, achieving a $12.55 billion valuation. The round was co-led by Lightspeed, Wellington Management, and Tiger Global, with participation from existing investors like a16z and Sequoia.
TL;DR
- Temporal raises $550M at $12.55B valuation to scale AI reliability platform.
- Funding will support global expansion and investment in core platform primitives.
- OpenAI, Snap, NVIDIA, and JPMorgan Chase are among Temporal's enterprise customers.
What happened
Temporal announced a $550 million Series E funding round on September 14, 2026, reaching a $12.55 billion valuation. The round was co-led by Lightspeed, Wellington Management, and Tiger Global, with participation from T. Rowe Price, SV Angel, and returning investors including a16z, Sequoia, and Index. The company plans to use the funds to grow its global operations and invest in the core primitives of its platform, as well as reliability and security enhancements requested by enterprise customers.
Temporal's team has doubled to 570 people over the past year. The company reported a more than 200% year-over-year increase in annualized revenue run rate, with net dollar retention staying above 200% since February 2026. The platform processed 1.9 trillion billable actions in August, up more than 350% year over year, and open-source installs passed 43 million, up 134% since December 2025. Temporal now works with more than 4,300 paying customers, up 139% year over year.
Why it matters
Temporal's funding reflects investor confidence in the growing importance of reliability in AI-era software. The company's platform, centered on Durable Execution, allows developers to build applications that can pause and resume without manual intervention, addressing a critical need for long-running AI workflows. This investment will enable Temporal to further develop its platform and expand its global footprint, potentially making it a key player in the AI infrastructure space.
For developers and startups, Temporal's growth and investment in reliability could provide a robust foundation for building AI applications. For investors, the company's rapid growth metrics and enterprise customer base indicate strong market traction. However, the competitive landscape for AI infrastructure is crowded, and Temporal will need to continue innovating to maintain its position.
Key facts
- Series E funding: $550 million
- Post-money valuation: $12.55 billion
- Lead investors: Lightspeed, Wellington Management, Tiger Global
- Participating investors: T. Rowe Price, SV Angel, a16z, Sequoia, Index
- Team size: 570 employees (doubled in the past year)
- Annualized revenue run rate: Up more than 200% year over year
- Net dollar retention: Above 200% since February 2026
- Billable actions processed (August 2026): 1.9 trillion (up more than 350% year over year)
Context
Temporal's platform is built around the concept of Durable Execution, which allows developers to create applications that can handle long-running workflows without manual intervention. This is particularly relevant in the AI era, where applications may need to pause for extended periods and resume seamlessly. The company's co-founders, Samar Abbas and Maxim Fateev, have a history of working on similar problems at Amazon, Microsoft, and Uber, where they developed frameworks that laid the groundwork for Temporal.
The funding round follows Temporal's Series D in February 2026, which raised $300 million at a $5 billion post-money valuation. The company has also seen significant integrations, such as its OpenAI Agents SDK and Vercel's AI SDK, and has held its fifth Replay conference in 2026. These developments highlight Temporal's growing ecosystem and its commitment to enterprise investment and global expansion.
