Viktor
A persistent AI coworker that lives inside Slack and Microsoft Teams and executes finished work across 3,200+ connected tools
About Viktor
Viktor is an AI teammate that lives entirely inside Slack and Microsoft Teams. You @mention it the way you would a colleague, and it works against 3,200+ connected tools, Stripe, Notion, HubSpot, Linear, to deliver a finished report, dashboard, or piece of code rather than a chat reply. It relaunched its current product in February 2026 with real momentum behind it, a $75M Series A led by Accel with personal checks from Slack co-founders Stewart Butterfield and Cal Henderson, and a self-reported 45,000+ teams using it. Sistava employees, by contrast, work through whichever channel you choose, chat, email, Slack, or others, with their own workspace (task board, Drive, work journal) rather than only a thread inside someone else's app.
Platform details
- Pricing: Free plan with $100 in credits that never expire, no card required. Team plans start at $50/mo (20,000 credits) up to $300/mo (125,000 credits). Reviewers report real spend for heavy users often runs $150-$400/mo above the headline rate.
- Founded: 2023, San Francisco (current product relaunched February 2026)
- Funding: $75M Series A led by Accel, with personal investment from Slack co-founders Stewart Butterfield and Cal Henderson
- Last reviewed: 2026-08-06
Official website
How much does Viktor actually cost, and where does it fall short?
The credit model punishes heavy, repetitive use: quick tasks cost 100-300 credits, complex workflows 500-1,500, and reviewers consistently flag that credits burn faster than expected. Viktor also has no standalone web app, if your team is not already living in Slack or Teams, it has nowhere to sit. Sistava works through whichever channel you choose, at a flat, predictable price.
Comparison
- Compare Viktor with Sistava — See the two platforms side by side when you are ready to evaluate them.