Free tools to sharpen the fundamentals.
No sign-up, no paywall. Quick drills you can run between lectures or before a round. When you want the full workbench, with real models, comps and SEC-graded estimates, that’s the Inner Circle.
Valuation
5 labsWhat a business is worth, and every argument you have to survive to say so.
WACC Builder
Build a discount rate from its parts. Adjusted beta through unlever and relever, live equity risk premiums, three routes to a cost of debt.
OpenBeta Refresher
A slope, not a speed. Generate a series with a beta you choose, regress it back, and see how far one estimate lands from the truth. Raw, adjusted, unlevered, bottom-up.
OpenReverse DCF
Slide the assumptions and read off the growth rate the market is already pricing in, with a verdict and a sensitivity heatmap.
OpenEV to Equity Bridge
Where two analysts who agree on EBITDA still end up far apart. Net debt, pensions, NCI, leases and the treasury stock method, each opening to its own inputs.
OpenName That Multiple
A Wordle for finance. Guess a company’s EV/EBITDA band from the business quality, learn what drives it, share your score.
OpenCorporate Finance
2 labsHow a company is funded, and what the financing does to returns.
Optimal Capital Structure
Why not just borrow more? Step leverage up and watch coverage fall, the rating decay and the spread widen until WACC bottoms out.
OpenPaper LBO Trainer
A fresh deal every time. Solve MOIC and IRR in your head, check the worked math, and see a returns waterfall break it down.
OpenM&A
1 labWhat happens to the numbers when two companies become one.
Product & Data
4 labsThe quantitative rounds in product, APM, BizOps and analytics interviews.
Product Metrics Tree
DAU is a vanity metric for most products. Pick the product shape, get the right north star, find the guardrail your change might break.
OpenUnit Economics
Most LTV:CAC figures are revenue-based, undiscounted and summed to infinity. Build the one you could defend, and treat payback as its own question.
OpenA/B Test Designer
Halve the effect you want to detect and you need four times the users. Size a test, then read a result and say what it actually entitles you to claim.
OpenSQL Cohort Drill
Six graded challenges against a real SQLite database in your browser. Cohort triangles, rolling actives, revenue retention, and why each number is easier to misread than it looks.
OpenEngineering
1 labThe back-of-envelope work a system design round is actually testing.
Technique
2 labsThe mechanics you are expected to have automatic.
Mental Math Gym
Sixty seconds of multiplication, percentages, growth and clean division. The arithmetic that comes up live in the room.
OpenMarket Sizing Drill
Nobody in the room knows the answer. Build the chain of factors under a clock, then put it next to a reference chain and find the term that carried your error.
OpenDone warming up? Run the real workflow.
Each drill has a professional counterpart in L3VLUP Skills: the same concept, executed the way the job executes it, with AI handling the grunt work and you owning the judgment.
Reverse DCF →
Earnings Teardown
Understand what actually changed this quarter — before the market finishes deciding.
Name That Multiple →
Earnings Teardown
Understand what actually changed this quarter — before the market finishes deciding.
Paper LBO Trainer →
Model Audit
Find the errors in a financial model before someone senior does.
Accretion / Dilution Animator →
Model Audit
Find the errors in a financial model before someone senior does.
Mental Math Gym →
Filing Diff
Find what materially changed between this filing and the last one.
The Labs are the warm-up. The Inner Circle is the gym.
Full modelling workbench with DCF, comps, LBO models and Variant’s SEC-graded estimates, plus the off-cycle network and Suro’s direct guidance.
Reps build speed. Feedback builds judgement.
The drills get your mechanics fast. A discovery session finds the thing the drills cannot see, and the bootcamps drill it with you in the room.