Temporal said on September 14 that it raised $550M in a Series E at a $12.55B valuation, co-led by Lightspeed with Wellington Management, the growth equity arm of Goldman Sachs Alternatives and Tiger Global. T. Rowe Price and SV Angel joined, with returning investors including a16z, Sequoia, Index, GIC, Sapphire Ventures and Amplify.
The company sells durable execution as the layer that keeps long-running software alive through crashes, retries and human approvals. Chief executive Samar Abbas said reliability has never been optional, but AI has quickly raised the cost of skipping it, and called the round a bet that demanding software will be built on that foundation from day one rather than patched afterwards.
Growth figures are steep. Annualized revenue run rate is up more than 200% year over year, net dollar retention has held above 200% since February 2026, and the platform processed 1.9 trillion billable actions in August, up more than 350%. Open-source installs passed 43M and paying customers now exceed 4,300, while headcount has doubled to 570.
The money goes to global operations plus reliability and security work enterprise customers have requested, at a moment when agent frameworks are competing to prove a workflow can survive a failure halfway through.
