Mastery before moving on
Each concept ends with a short check. Pass it and the next one opens. Miss it and you get targeted practice, not the whole lesson again.
Learn case interviews by doing
lowercase teaches you the concepts, then puts you inside real interview cases until breaking down a problem feels natural. Harder cases unlock only once you've mastered the easier ones.
For MBA candidates and anyone working towards a consulting offer.
Practise with a friend, scored like the real thing
One of you interviews, one of you solves. The interviewer sees every fact, hint and the full issue tree. The candidate sees only what they've earned. Then you swap.
- Invite friends and start a case in seconds
- Reveal facts and hints as the case unfolds
- Score each other on a six-part rubric
- Switch roles and run it back
An AI interviewer that makes you think Early access
It won't hand you the answer or a framework to copy. It asks the next question, releases a fact only when you've earned it, and opens the issue tree as your structure holds up.
- Asks before it tells
- Case facts unlock as you progress
- An issue tree that grows with your thinking
- Chat on Marathon, chat and voice on Journey
Watch a case unfold
Every case is played, not read. You lead, the facts follow, and the issue tree shows how far your structure has really got you.
Diagnostic Center, Mumbai · ProfitabilityLevel 1
InterviewerOur client's diagnostic centre has seen profits fall 20% in a year. Where would you start?
YouI'd split profit into revenue and cost, then check which one moved.
InterviewerGood split. Which side would you test first, and what would you ask for?
YouRevenue. Has patient volume changed, or revenue per patient?
Fact unlockedFootfall is flat. Revenue per patient fell 18%.
InterviewerSo what could pull revenue per patient down?
Your issue tree
You're interviewing RiyaLive
You, interviewingA premium gym chain wants to open in Pune. Should they?
RiyaTwo questions: is the market attractive, and can we win in it? I'd start with who the customer is.
You revealed a factPune has about 40,000 households earning over ₹30 lakh a year.
RiyaIf one in ten is a gym-goer, that's 4,000 potential members. Let me check the competition next.
YouGood. Wrap up whenever you're ready.
Interviewer view
Switch roles ⇄
Fact 1 · revealed
Fact 2
Hint · unused
Structure & MECE
Hypothesis-driven
Quantitative analysis
Business judgment
Communication
Recommendation
Facts arrive when you ask for them
That's how real case interviews work, and it's the habit that separates a structured candidate from a lucky one.
From first framework to final round
Three levels, each with its own concepts and cases. You move up when your results say you're ready, not when the calendar does.
Build the toolkit
Short, interactive lessons on the ideas every case relies on, followed by focused cases that use one or two of them at a time.
Concepts
Profit = revenue − costSpotting the case type 3Cs and the 4PsClarifying questions Market sizing basicsReading an exhibit fastCases at this level
Diagnostic Center, MumbaiD2C Coffee Brand Premium Gym Chain, PuneCloud Kitchen pricing Bakery Chain acquisitionDelhi Metro NetworkCombine and prioritise
Cases with more than one moving part. You learn to lead with a hypothesis, choose which branch matters most, and keep the maths honest.
Concepts
Porter's five forcesVRIO Hypothesis-led structuresPrioritising branches Break-even and paybackSynthesising mid-caseCases at this level
Regional Airline marginsEV Two-Wheeler, Indonesia Five Star HotelMixed review from Level 1Think like the partner
Ambiguous prompts, several issues at once and pushback from the interviewer. This is where structure has to hold under pressure.
Concepts
Framing ambiguous promptsMulti-issue cases Structured brainstormingSecond-order effects Risks and next stepsHandling pushbackCases at this level
Specialty Chemicals squeezeTractor Insurance Provider Interleaved final-round setsBuilt on how people actually learn
Solving more cases isn't the same as getting better at cases. lowercase uses well-studied learning methods, the same ones behind the best adaptive tutors, and applies them to case interviews.
Review that's spaced and mixed
Old concepts come back at growing intervals, mixed in with new ones. You learn to recognise which tool a case needs, not just how to use it.
Feedback while it still matters
Hints when you're stuck, a rubric after every case and a transcript to look back on. You see which skill needs the next rep.
Two ways to practise
Use both. A friend gives you the pressure of a real person. The AI gives you a patient interviewer at midnight before your interview.
Practise with friends
Add friends by username, see who's online, and send a case invite. The interviewer runs the case from a full console. The candidate works from what they've uncovered.
- Facts, hints and the issue tree are in the interviewer's hands
- Score the candidate on structure, hypotheses, maths, judgment, communication and the recommendation
- Switch roles, because interviewing teaches you what good looks like
- Earn XP, keep your streak and climb the weekly league together
Included in every plan.
Practise with the AI interviewer Early access
Not a chatbot that explains the case to you. It behaves like a good interviewer: short prompts, probing follow-ups, and nothing you haven't asked for.
- Gives case facts only when your question earns them
- Pushes you to structure first, then to prioritise
- The issue tree on screen opens up as you go
- Practise by chat, or speak out loud with the voice interviewer
Chat on Marathon and Journey. Voice on Journey.
5
case types from real interviews
Every case is built from a real interview prompt, with its facts, hints and issue tree written out so it can be played rather than just read.
ProfitabilityRevenue growthMarket entryPricingM&A
6
skills on every rubric
Structure, hypotheses, quantitative analysis, business judgment, communication and the recommendation. Your feedback points to a skill, not a vibe.
6 mo
is our longest plan
lowercase is built to get you ready and then get out of the way. If you still need us after six months, we haven't done our job.
Questions, answered
How is this different from a casebook or a case library?
A casebook gives you finished answers to read. lowercase makes you produce the thinking yourself: you learn a concept, prove you can use it, then lead a case where facts arrive only when you ask for them. Your progress decides what comes next.
I've never done a case interview. Where do I start?
At Level 1. The first lessons cover the profit equation, spotting the case type and asking good clarifying questions. You'll be running a simple case with a friend within your first session.
Do I need a friend to use lowercase?
No. Concept lessons and review work on your own, and the AI interviewer (on Marathon and Journey) gives you full cases without a partner. Practising with friends adds the pressure of a real person, so we recommend mixing both.
Is the AI interviewer available today?
It's in early access. Marathon members get the chat interviewer and Journey members get chat and voice as they roll out. Practising with friends and every concept lesson are available on all plans now.
What happens when my plan ends?
Nothing renews automatically. Plans are one-time passes, because the goal is for you to be ready, not to stay subscribed.
The interview tests how you think.
Start training that today.
Your first lessons take ten minutes. Your first case with a friend takes thirty.
Start practising