Building01
Defend
Threat intelligence agents
Autonomous agents that surface signal from adversarial noise. Built for the SOC analyst at 11pm with the data in but the call still hers to make.
vesperlabspace
AI agents for the vesper hour
When the data is in but certainty isn’t.
We build AI agents for that hour.
The vesper hour
The Romans named the planet Venus at dusk Vesper — the brightest navigation point in twilight, the bearing sailors took before dark. Monasteries rang the vesper bell at the same hour: a call to gather the day’s evidence and reckon with what came next.
In every domain we build for — defense, medicine, infrastructure, sport — the hardest decisions aren’t when data is missing. They’re when data is overwhelming. The vesper hour is that moment. Our agents work in it.
What we build
Each product is a scope trained on a domain where the vesper hour exists every day.
Threat intelligence agents
Autonomous agents that surface signal from adversarial noise. Built for the SOC analyst at 11pm with the data in but the call still hers to make.
Clinical decision support
A USMLE-grade question bank and reasoning companion. For physicians making high-stakes calls on incomplete information — the bedside vesper hour.
Baseball analytics
Late-inning, high-leverage, ambiguous-data decisions. A scope for front offices and clubhouse staff who live in seventh-inning twilight.
AI agent orchestration
The infrastructure beneath every Vesper agent. Routing, observability, policy, memory — the moral object that decides what an agent is allowed to see and do.
Universal file & app launcher
A single keystroke that resolves any file, any app, any context across your machine. The control surface for the working day — and a research bed for the same agent patterns we deploy in Defend and Diagnose.
Writing
Long-form essays on threat intelligence, AI control planes, and the operator’s craft. Slow writing for fast practitioners.
Why the right object of design is not the decision itself but the moment before it.
Analysts make their best calls when data is overwhelming and shift change is two hours away. An argument for agents that hold attention, not replace it.
What an agent is permitted to see, remember, and act on is not an engineering question. It is the question.
Open source
Internals of the control plane, agent patterns, and tooling we use ourselves are published as we mature them. Contributions welcome.
Org index. Repos appear as we publish them.
Reference implementation of the control-plane primitives: routing, memory, policy, observability.
The launcher engine, OS-agnostic. The piece you can read, run, and bend.
Elsewhere
About
Vesper Labs LLC is a two-person studio in New Jersey. Karthik — founder, engineer — spent four sequential years moving through Amazon Web Services, ADP, Infosys, and Google, building data and AI systems for each. Danika — physician, partner — runs the medicine that informs Diagnose.
The company was incorporated as SVPK Cloud LLC in 2021. We renamed to Vesper Labs in 2026 to signal what the work had become — less general consulting, more deliberate construction during the hours when the office goes quiet and the work gets honest.
EIN 87–2039193 · Annandale, NJ · Two members · Member-Manager: Karthik Arunapuram
Begin a conversation
Office of record
3 Williams Way
Annandale, NJ 08801
United States