Accel led a $75 million funding round for Viktor, an AI startup founded in Warsaw that embeds a virtual coworker into Slack and Teams.
Simply put, Viktor sits in your company's Slack or Teams workspace as a team member named 'Viktor.' You @mention it, and it executes tasks.
Why Accel invested $75 million
Key metrics:
- Launched publicly in February
- Reached $15M ARR in three months
- 12,000 teams have installed it in Slack or Teams
- One customer had Viktor review Meta Ads configuration and found it could save $10,000 per week in ad spend
- Another customer generated an additional $133,752 in recurring revenue within 30 days
- Yet another cut $4.8 million in budget
Such growth in SaaS typically occurs only when a product meets a critical need or catches a user behavior inflection point. Viktor hit both:
- Companies already use Slack/Teams, so Viktor requires no process change—it just plugs in.
- It integrates with 3,000+ tools, from Google Drive to Meta Ads, Notion to Shopify.
How it differs from Copilot and Agentforce
Accel partner Zhenya Loginov said: 'Viktor is a team member, not a personal assistant.'
In plain terms, most AI assistants are personal (ChatGPT, Copilot, Claude), while Viktor is designed for teams.
- Salesforce Agentforce: Tied to the Salesforce ecosystem, requiring full CRM adoption.
- Microsoft Copilot: Locked into Office suite, limited cross-SaaS capability.
- Viktor: A native third-party Slack app, not tied to any SaaS ecosystem.
Viktor doesn't compete on model quality; it bets on embedding position—whoever is closest to the user wins. The Warsaw team believes the future workplace agent wins not by having the strongest model, but by creating the least friction.
Who are the founders
CEO Fryderyk Wiatrowski and CTO Peter Albert previously worked together at Meta AI. After leaving Meta, they tinkered with AI agents in their spare time for two years, then assembled a team of six from Meta, Google, and Oxford to found Viktor. The company is headquartered in Warsaw with an office in Berlin.
Notable angel investors include:
- Slack co-founders Stewart Butterfield and Cal Henderson—who know best what apps succeed on Slack.
- Synthesia CEO Victor Riparbelli
- Executives from DeepMind, Figma, and ElevenLabs
The big bet
Viktor's entire wager is that AI agents will not emerge as standalone apps but as 'integrated employees' within SaaS suites.
If they are right, the independent ChatGPT Agent / Claude Cowork path from OpenAI and Anthropic could be bypassed—customers will simply @Viktor in Slack rather than open a separate AI website.
If they are wrong, they will collide head-on with Microsoft 365 Copilot and Salesforce Agentforce, and the outcome will depend on sales velocity.
As for how long the $75 million from Accel will last—given current customer growth, a Series B is likely by this time next year.
Sources: Exclusive: AI startup Viktor raises $75 million to put a virtual 'coworker' in Slack and Teams (Fortune); CocoLoop; Viktor takes $75m from Accel to put an AI coworker inside Slack and Teams (The Next Web); Welcome, Viktor: The AI coworker for the modern workplace (Accel)