Per-student cloud COGS & per-school break-even
Runs entirely in your browser from data/unit-economics-COGS.csv — no R, no server.
Drag the sliders to see how caching, school size, and box cost move the economics. All figures are 2026 planning
estimates; edit the CSV to recompute.
Loading data/unit-economics-COGS.csv…
(cost-bombs deferred)
(paid tier only)
(box beats all-cloud above this)
Line-item cost per active student / month
| Item | Tier | unit $ | uses/mo | cache | $/student/mo |
|---|
Where the money goes
Box vs all-cloud (per student / yr)
All-cloud is flat per student; local-first falls as the box cost spreads over more students. They cross at the break-even size.
How this is computed
For each line: $/student/mo = unit_cost × uses × (1 − cache_hit_rate) — you only pay for cache misses.
Shippable v1 sums the non-deferred lines; the cost-bombs (pronunciation assessment, real-time voice) are a
quota'd paid tier shown separately. Break-even = box annualized cost ÷ (all-cloud $/yr − the Tier-2 slice a box can't absorb).