Restate, a Berlin and San Francisco startup building infrastructure for AI agents and distributed workflows, said Tuesday it closed a $20 million Series A led by Singular, with participation from Redpoint Ventures and Capital One Ventures. The round brings the company's total funding to $27 million.
The startup declined to share its valuation. Redpoint, which led Restate's $7 million seed round last June, returned for the new financing.
Restate was founded in 2022 by three veterans of Apache Flink, the open-source data streaming platform that became a linchpin of real-time analytics at companies like Uber and Netflix. Co-founder and CEO Stephan Ewen co-created Flink and later started data Artisans, which Alibaba bought in 2019 and folded into what became Ververica. His co-founders, Igal Shilman and Till Rohrmann, also worked on Flink. The trio added a fourth co-founder, Ahmed Farghal, a former engineer at Stripe and Meta, as part of the Series A, according to TechCrunch.
The money will go toward hiring a go-to-market team, adding engineers, and expanding the company's Bay Area office, Restate said.
At its core, Restate is tackling a problem that has vexed developers building autonomous agents and complex backend workflows: how to make processes durable without dragging down performance. The company's runtime turns agents, workflows, and services into processes that can survive failures, restart from exactly where they left off, and handle thousands of operations per second. Unlike older systems, it does this with a single binary server that doesn't require an external database, message broker, or cache.
The architecture relies on what Restate calls a purpose-built distributed log with embedded storage and replication. The system uses RocksDB for local storage and object stores for snapshots, optimized to minimize latency on the critical path. For companies running AI agents that need to execute dozens of steps in quick succession, those milliseconds matter.
Restate offers three deployment models: a self-managed server, a managed cloud service with SOC 2 Type II certification, and a bring-your-own-cloud option that runs inside customer virtual private clouds on AWS and Google Cloud. Azure support is in preview.
The startup's early traction includes Replit, the browser-based coding platform, which migrated its AI agent infrastructure from Temporal to Restate. Replit now uses the bring-your-own-cloud deployment and handles up to 25,000 durable actions per second per cell during usage spikes, according to a company case study. "We needed a new durable execution runtime that was both fast and a pleasure for developers to work with," said Michele Catasta, Replit's president and head of AI, in Tuesday's announcement.
Restate also counts DOSS and BILT Rewards as customers. A Fortune 500 bank uses the platform for multi-region-consistent financial workflows, though Restate did not name the institution.
The company is positioning itself as an alternative to Temporal and AWS Step Functions, two established players in what's known as the durable execution market. Restate argues that its architecture enables lower latency, making it suitable for use inside agent loops where delays compound quickly. Last summer the company introduced reserved-capacity licensing that it said could run up to 10 times cheaper than activity-based pricing at high volumes, citing cost examples for workloads running 500 and 5,000 actions per second.
"Durable execution solved an important problem: it made individual processes reliable," Ewen said in the announcement.
Henri Tilloy, a partner at Singular, said Restate is "redefining where durable execution can be applied." Whether that redefinition translates into a durable business of its own will depend on how quickly the company can convert a technical advantage into market share against entrenched competitors. For now, at least, it has the capital to find out.
