Think inside your AI world.
PostHog + QuickBooks through Unl
Usage climbing is only good news if the cost of serving it isn’t climbing faster — and the two numbers that decide it live in different systems.
PostHog + QuickBooks through Unl reads active usage against the infrastructure and tooling spend behind it, measured against the cost-per-active limit you fixed, so growth reads as “paying its way” or “getting more expensive per user.” That limit is kept in Unl.
The criterion that binds them
Say you’ve ratified a unit rule: cost-to-serve per weekly-active user must stay under a set figure, because past that line the free tier stops being sustainable. Both reads answer to that ceiling.
The two naked reads
PostHog returns weekly actives, retention and even the LLM-cost view. QuickBooks returns the infrastructure and software spend by category. Both are correct; neither divides one by the other, so “is each new user cheaper or dearer?” is yours to work out.
The one measured answer
Measured against your ceiling: actives are up a third, but cost-to-serve per active has crept to 12% over your line — the tooling spend grew faster than the base, so growth is currently costing more per head than you allowed.
And back again
If you accept a higher ceiling for a quarter to fund a migration, that revised figure is ratified in Unl — and the next read judges cost-per-active against the number you now stand behind.
The answer comes back measured against what you already decided, and why.
A router can place PostHog usage beside QuickBooks costs. It cannot say each user is getting dearer than you allowed, because the cost-per-active ceiling — the criterion — is in neither the analytics nor the accounts.
The lane is live and open to this tool today: one box, paste anything. If it speaks MCP, Unl can reach it. Readings arrive unprompted, the data beside the criterion; Unl is a courier, not a warehouse, and keeps only your keys and the frame.
Read further
Questions people ask
Can AI tell me if my growth is getting more expensive per user?
Yes, through Unl. You ratify a cost-per-active ceiling and why; PostHog and QuickBooks are read together against it, so the answer says whether each new active is paying its way or drifting over your line.
Why can’t an analytics tool do this alone?
PostHog holds the usage and QuickBooks holds the spend; neither holds your cost-per-active rule. That rule lives in Unl, so only a measured read across both produces the unit-economics verdict.
Does Unl store my usage or accounting data?
Unl reads through PostHog and QuickBooks, and can write back on your explicit gesture — it never acts as a side effect of a read.
What this is
Think inside your AI world — you stay in command
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