Aiven Snaps Up Flow AI to Keep AI Agents Reliable at Scale
Helsinki data platform Aiven has acquired Finnish startup Flow AI, bringing its tools for running AI agents reliably on live business data into Aiven’s open-source platform. Financial terms were not disclosed.
Text by Martti Asikainen, 29.7.2026 | Photo by Aiven
Helsinki-based data platform Aiven has acquired Finnish AI agent startup Flow AI, the companies announced on 23 July. Financial terms were not disclosed.
Flow AI builds tools for running AI agents reliably on live business data. Its technology will be folded into Aiven’s platform, which already manages open-source data services including Apache Kafka, PostgreSQL, ClickHouse, OpenSearch and Valkey across multiple cloud providers.
Flow AI describes its product as providing the runtime, data layer and evaluation tools that let software-as-a-service companies embed reliable, customer-facing AI agents directly into their own products.
Single platform
Aiven’s chief executive and co-founder, Oskari Saarenmaa, said the deal reflected a shift in how businesses use data, with AI agents increasingly acting as the interface to it.
“Agents are only as good as the infrastructure serving them — the freshness of the data, the reliability of the context, and the quality of evaluations they are exposed to,” he said.
He added that the aim was a single platform combining agent tools with production data.
Aiven said the acquisition should reduce the technical complexity that often stalls AI projects, letting customers run AI agents with the same reliability and scale they expect from their existing data infrastructure.
From writing tool to infrastructure
Flow AI was founded by Aaro Isosaari, Karolus Sariola and Bernardo Garcia del Rio, who have built AI products together since 2020.
Their first product, Flowrite, was one of the earliest AI writing tools built on GPT-3. Isosaari has said it drew a waitlist of 100,000 people before launch; Aiven’s announcement says it went on to reach hundreds of thousands of users. Flowrite now continues separately under another company, Maestro Labs.
Flow AI’s team instead turned to a harder problem: making AI agents behave reliably over structured business data at scale. That became the company’s current product — tools that let a company’s software check how fresh its data is, verify the context an agent is using, and assess the quality of an agent’s output before it reaches a customer.
Isosaari said joining Aiven would let the team reach far more customers than it could alone. “Aiven has spent a decade building data infrastructure the right way — open, portable and developer-centric,” he said, calling it a chance to help build the next generation of AI infrastructure.
Flow AI had previously been backed by investors including Project A, Lifeline Ventures and Seedcamp.
Third acquisition
This is Aiven’s third acquisition since Saarenmaa founded the company in 2016. One earlier deal, in 2023, was the database optimisation tool EverSQL. The identity and timing of the third, earlier acquisition have not been independently confirmed.
Aiven says it passed $100m in annual revenue run rate in 2025 and employed around 468 people as of June 2026. It has increasingly focused its product roadmap on AI-related tools rather than building every capability in-house.
Because neither company has disclosed the deal’s size, it is not possible to assess how it compares with Flow AI’s earlier funding, or what return it delivered to investors.
The acquisition also reflects a broader trend in the AI agent infrastructure market, where smaller specialist teams are increasingly being absorbed by larger platforms rather than scaling independently.
