Viktor, a startup built out of Warsaw, has raised a US$75 million Series A led by Accel to grow an AI agent that works like a colleague inside Slack and Microsoft Teams. The round, reported by Fortune on 19 May, drew Bek Ventures, Kaya VC, Inovo VC and Tenacity Capital, plus a notable angel list.
What it does
Viktor sits in the chat tools people already use. Connect it to a company's services and it can answer questions and carry out tasks that span those systems, all from a Slack or Teams message. The bet is on meeting workers where they are rather than asking them to open one more app. Founders Fryderyk Wiatrowski and Peter Albert met at Meta, and the small engineering team is drawn from Meta, Google and Oxford.
The traction
The early numbers are what pulled in the round. Three months after a February launch, Viktor reports a US$15 million annualised revenue run-rate, more than 2,000 organisations using the product and over 12,000 teams installed across Slack and Teams, per The Next Web. These are company-reported figures. The angel list adds weight: Slack co-founders Stewart Butterfield and Cal Henderson backed it, along with executives from Google DeepMind, Figma and ElevenLabs.
The read
The "AI coworker in chat" idea is crowded, and the incumbents own the chat surface — Slack belongs to Salesforce, Teams to Microsoft. Viktor's defence is speed and breadth of integration, getting useful before the platform owners ship their own version well. The revenue curve says it is working for now. Whether it survives Microsoft and Salesforce deciding to compete directly is the question every chat-layer startup eventually faces.
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