Reasoning infrastructure · Series B
Intelligence that lives behind glass.
Halcyon routes every prompt through a live mesh of models, tools and memory — then shows you exactly what it did. One control plane for production AI, with the audit trail your security team keeps asking for.
The platform
Three layers. Zero guesswork.
Most teams stitch prompts, retries and logging together with duct tape. Halcyon ships the whole stack as one observable system — so “it worked in the demo” stops being your release strategy.
Adaptive routing
Every request is scored for complexity, cost ceiling and latency budget, then dispatched to the cheapest model that can actually finish the job. Fallback chains are declared, not hoped for.
Trace-native observability
Replay any production answer token by token: which tools fired, what memory was read, which claim failed verification. Export the trace as evidence when compliance asks.
Policy guardrails
PII redaction, prompt-injection filters and spend caps run in the data path — not in a wiki page. Violations block the call and file a ticket in the same millisecond.
Architecture
Depth you can actually inspect.
Requests don’t disappear into a black box — they move through visible layers, each one instrumented. Scroll and watch the stack separate: this is the same view your on-call engineer gets at 3am.
Layer 03 · verify
Answer synthesis & claims check
Layer 02 · act
Tool execution plane
Layer 01 · plan
Intent & budget planner
Customers
Teams that stopped guessing.
“We cut model spend 38% in six weeks and, for the first time, could answer ‘why did the agent do that?’ with a link instead of a shrug.”
Priya Raghavan · VP Engineering, Northwind Health Systems
average reduction in inference spend within one quarter
faster incident triage with full route replay
unaudited model calls across the entire fleet
Free tier · 250k routed tokens / month
Put your AI behind glass. Keep every receipt.
Start on the free tier, wire up one route, and see your first full trace in under ten minutes. No sales call required until you want one.