White Circle 🇺🇸 Hiring · 19 open roles ↗
Control layer for AI enabling companies to test, protect, observe, and enhance AI interactions.
About White Circle
The main product is a control layer for AI that enables companies to test, protect, observe, and enhance AI interactions by managing unsafe inputs, preventing unauthorized access, and analyzing user behavior. It employs real-time monitoring and tuning of AI models based on live signals to optimize performance and ensure safety.
White Circle is a US-based company founded in 2022, now around 30 people. It has raised $11M in disclosed funding. FundFinder classes it as AI & ML.
Founded by Spike Lu (Founder; repeat founder; previously PlayStation, Stealth Company (Spike Lu); Emory University), Denis Shilov (Founder & CEO; repeat founder; previously Facel; London School of Economics and Political Science), Alex Nikolich (Founder/ CTO; previously AIRI; ITMO University), Aleksandr Nikolich (Founder/ CTO; previously AIRI; ITMO University), Donovan So (Co-Founder & CTO; previously Credit Suisse, Horizons; Carnegie Mellon University), Yuanxin Lu (Founder; previously DeltaDNA, PlayStation; Emory University).
Its investors also appear on FundFinder's most-active lists for Seed · Fintech (111 funds), Seed · Generalist (110 funds), Seed · Healthcare & Wellbeing (87 funds).
Company facts from Harmonic and public filings; team backgrounds from public profiles. Refreshed weekly.
Hiring now · 19 live roles, checked daily
Showing the newest 8 · all 19 on their careers page ↗
Seed · May 2026
- Moonfire Ventures — Moonfire Ventures is a new venture exploring early stage investing opportunities in Europe. · cheques £100k – £1.8M
- Octopus Ventures — Octopus is a multi stage European venture capital investor specializing in health, fintech, deep tech, B2B software and consumer. · cheques £100k – £15M