Paris-based Mio emerges from stealth with €1.9 million to build an AI colleague that lives inside Slack

Mio, a Paris-based startup building an AI colleague that lives inside Slack, today announced a €1.9 million ($2.2 million) pre-Seed round as the company emerges from stealth.

The round was co-led by Fabric.vc and Topology.vc. The company plans to use this funding to expand Mio’s engineering team, accelerate product development, and grow its customer base across Europe and the United States.

“We don’t think the future of AI at work is another app people have to open. The best colleague already understands what’s happening, knows how your company works, and steps in before you have to ask,” said Arthaud Mesnard, founder and CEO of Mio.

Founded in 2025 by repeat entrepreneur Arthaud Mesnard, Mio states that instead of a new chatbot for employees to remember to open, Mio integrates directly with existing team workflows. It assists in completing recurring tasks, keeping information up-to-date, and proactively advancing work.

It further notes that unlike standalone AI assistants, Mio builds an understanding of how a company operates. It connects to the tools a team already uses, learns company context over time, and can execute work across those systems instead of simply making suggestions. Since Mio is model-agnostic, it combines the top AI models for different tasks rather than locking customers into a single provider.

Explaining how Mio differs from ChatGPT or Claude for Slack, the company notes that Mio is grounded in the client company’s actual data: messages, documents, tickets, and calendar. Unlike general chatbots, which answer from public information, Mio answers from the team’s context and takes actions on the client’s behalf across its connected tools.

Mio’s data access is limited to reading messages and shared files in channels it is invited to, as well as in DMs with the Mio app. Optional integrations such as Google Workspace, Notion, Linear, HubSpot, and GitHub activate only if the client chooses to connect them. Mio asserts that it does not train AI models using customer data.

Mio highlights that it is GDPR compliant and operates on Google Cloud Platform in Europe, ensuring encryption both at rest and during transmission. All integration credentials are also encrypted.

“The launch comes as AI shifts from answering questions to getting work done. While the first wave of AI focused on chat interfaces, a new generation of agents is beginning to operate directly inside the tools teams already use. Mio believes Slack is becoming the natural home for that shift,” Mio mentioned in the press release.

The company stated that over 100 companies, ranging from early startups to Series B scale-ups, are already using it daily.

It reports that early-access customers save over a full workday each week, averaging 8.2 hours. This is achieved through workflows such as morning briefs, meeting recaps, CRM updates, customer follow-ups, reporting, analysis, and engineering tasks.