The most expensive "MBB assessment pack" is often the worst prep you can buy. McKinsey, BCG, and Bain do not share one screen. They publish different clocks, different item types, and different rules about calculators, sitting once versus stopping mid-test, and what the score even represents. A polished simulator for the wrong invitation still trains the wrong habits.
The thesis is simple: judge practice by fidelity to what the firm itself publishes, then buy only the gap that remains. After this piece you should be able to read an invitation, score three product pages in under ten minutes, and know when CoachNed is the right fit and when it is not.
What each firm actually publishes
Start with the invitation name, then the firm's own careers page. Everything else is product marketing.
| Firm | What the firm says publicly | Timing the firm states | Prep the firm recommends |
|---|---|---|---|
| McKinsey | Solve is a gamified problem-solving assessment for most consulting applications | Length is in your invitation email; each task starts with an untimed tutorial | Approach with curiosity; McKinsey says no business knowledge or gaming experience is required |
| BCG | Mexico describes an Online Case Experience guided by Casey (~30 minutes) and a separate Consulting Career Assessment (~30 minutes, Associates). US Associate recruiting sends CCA ~30–35 minutes with a 48-hour window, and invites select candidates to an online case (~35 minutes) | Invitation and regional FAQ control the clock | For the chatbot case, BCG says prepare as you would for a live case interview; for CCA, BCG says no preparation is needed |
| Bain | Digital assessment hub: if required, the email names Sova or Test Gorilla | About 30–40 minutes; deadline in the email | Quiet room, laptop, no AI assistance. Test Gorilla: one sitting, calculator allowed. Sova: may be completed across sittings before the deadline; Bain points candidates to Sova's Candidate Preparation Hub |
None of those pages endorses a third-party simulator. They also do not publish a universal item blueprint or a cut score. Treat any vendor claim of "exact McKinsey questions" or "identical Bain scoring" as marketing, not evidence.
The fidelity scorecard (work it on any product page)
I score a simulator the way I score a resume: three columns, numbers, no adjectives. For each assessment named in your invite, award up to 3 points per column.
| Column | 3 points | 2 points | 1 point | 0 |
|---|---|---|---|---|
| Timer | Product states a clock that matches the firm's public range (or your invite) | Clock exists but differs by more than ~20% | Untimed practice only | No timer disclosed |
| Item types | Demo shows the same interaction family the firm describes (game phases, chatbot case, MCQ sections) | Related drills, wrong shell | Generic aptitude with firm logos | Screenshots only |
| Scoring / feedback | You finish a run and see what was marked, with a worked explanation | Score without explanation | Pass/fail badge | Paywall before any result |
Worked example. Suppose your invite names Bain Test Gorilla and you open three pages.
- Product A: timed numerical and problem-solving demos you can finish free, section clock visible, score after submit. Timer 3, items 3, scoring 3. Total 9.
- Product B: "MBB aptitude drill pack," no section names, 60-minute mixed quiz, answer key behind checkout. Timer 1, items 1, scoring 0. Total 2.
- Product C: full Casey chatbot demo plus Bain MCQs. Strong Casey fidelity, but you are not applying to BCG this week. For this invite: Timer 2, items 1, scoring 2. Total 5.
Product C is not bad. It is misallocated. I have watched candidates burn a week on chatbot cases while their Bain numerical section was the gate. The scorecard stops that.
Ned's rule. Match the invitation first. Practice that builds speed on the wrong clock creates false confidence; I would rather see a candidate take two timed reps of the named format than twenty polished reps of a different firm.
McKinsey Solve: fidelity to a game, not a case
McKinsey's public line is that Solve showcases problem-solving in a game, that results sit alongside the rest of the application, and that roommates, AI tools, and screenshots are forbidden. It does not publish module names, phase clocks, or a practice clone. Candidate folklore about Sea Wolf, Red Rock, and Sustainable Futures Lab is widespread; treat module names as community labels until your own invite or tutorial confirms them.
What that means for simulators:
| Product (own page) | What you can verify without paying | Honest limit |
|---|---|---|
| SolveForge | Free Red Rock and Sea Wolf scenarios with phase locks and an immediate score; Sustainable Futures Lab and legacy Ecosystem behind Pro | Price not shown before signup on the landing page I checked; strongest free Solve shell among the pages reviewed |
| Solve Games Guide | One free timed session per game; site states Redrock ~35 minutes, Sea Wolf ~30 minutes, established-format SFL ~20 minutes; paid plans are 2-week access packages | Deepest debrief marketing; checkout prices live on the pricing page and change by package—verify before you buy |
| CoachNed (Sea Wolf, Red Rock, SFL) | Browser practice for all three modules, open during the free week, original content | Diagnostics and skill transfer into case work, not a claim of pixel-perfect McKinsey scoring |
If your only invitation this month is Solve and you want maximum free game reps with phase locks, SolveForge's public free path is the sharper tactical pick. If you also need Casey, CCA, and case drills after Solve, a multi-format product becomes rational. Do not pay for Ecosystem-only packs if your invite is the current three-module set; Ecosystem is widely described as retired.
BCG: two different products, two different practice lanes
BCG candidates often collapse "online case" and "CCA" into one search. The firm's own pages keep them separate.
Casey / Online Case Experience. BCG Mexico describes an interactive business case guided by a chatbot, about 30 minutes, English, PC with reliable internet. US Associate recruiting invites a select group to an online case of about 35 minutes roughly two weeks after the deadline. BCG's case prep page stresses approach and quality of reasoning over a single right answer. That is the fidelity target: sequential questions, exhibits, written (and sometimes recorded) synthesis, forward-only decisions.
CoachNed's Casey-style case at /casey/urbanbrew-coffee-margin-case trains that lane with an original coffee-margin scenario. DrillCase publishes a free full Casey-style demo and sells deeper Casey libraries (its own FAQ lists one-time Casey tiers up to $350 for every case, with All-Access at $250). If you need a large volume of chatbot cases and nothing else, DrillCase's Casey inventory is the better volume play. If you need one high-signal diagnostic that then feeds structure and math drills, CoachNed is enough.
CCA. BCG describes a multidimensional assessment of roughly 30–35 minutes. US Associates get the invite 30–90 minutes after applying and have 48 hours. BCG does not publish an official eight-question numerical blueprint on the careers pages above. Candidate reports of an 8-in-12 numerical block are folklore until your tutorial confirms them. CoachNed's /tools/bcg-cca-simulator is an independent numerical mock (eight original items, shared 12-minute clock) built to train scheduling, reallocation, percentages, and patterns under a shared budget—not a replica of BCG's scoring engine.
Bain: Sova versus Test Gorilla is an office decision
Bain's hub is unusually clear: the email tells you which platform you are on. Test Gorilla is one sitting; Sova need not be. Calculators are allowed on the digital assessment, not in later interviews. Bain states about 30–40 minutes for the assessment. Bain does not publish section lists or cut scores on that page.
MBB Gorilla is built around that split. Its own pricing page lists free Numerical Reasoning and Problem Solving practice, a $49 one-time Starter, and a $79 Elite that includes all four TestGorilla section simulators plus a Sova track and a ~45-minute full mock. If your invite is Bain-only and you want section volume plus a full mock on a one-time fee, MBB Gorilla's published offer is the closest Bain-shaped product in this roundup.
CoachNed's /bain-sova covers explained numerical and abstract items for the Sova-shaped lane. It is a diagnostic, not a 200-question bank. DrillCase sells Bain aptitude modules from $20 per section on its site. Pick volume (MBB Gorilla / DrillCase) or a short explained diagnostic plus case prep (CoachNed) based on how many days you have before the deadline.
Where CoachNed wins, and where it does not
CoachNed's bet is a free week across /mckinsey-sea-wolf, /mckinsey-red-rock, /mckinsey-sfl, /casey/urbanbrew-coffee-margin-case, /tools/bcg-cca-simulator, and /bain-sova, then Season Pass $120 for 90 days or Pro $49/month. The same account continues into /start, /interview, and the drill library. That matters when your pipeline is two firms and a live case round, not one isolated screen.
| Situation | Prefer |
|---|---|
| Solve only, maximize free game shells this week | SolveForge free Red Rock / Sea Wolf runs |
| Solve only, want deep Redrock scenario volume on a short paid window | Solve Games Guide 2-week packages (verify current checkout) |
| Bain Test Gorilla or Sova only, need section banks and a full mock | MBB Gorilla Elite ($79 one-time on their pricing page) |
| BCG Casey volume (dozens of chatbot cases) | DrillCase Casey tiers |
| One invite this week plus live cases next month | CoachNed free week, then Season Pass if the diagnostic shows a gap |
| You still cannot name the assessment in the email | Do not buy anything. Reply to the recruiter and read the firm page first |
Practice assignment for this week
- Copy the exact assessment name from your invitation into a note.
- Open the matching firm page above and write the official duration and rules in one line.
- Run one free diagnostic only for that format: Solve → /mckinsey-red-rock or /mckinsey-sea-wolf; Casey → /casey/urbanbrew-coffee-margin-case; CCA-style numerical → /tools/bcg-cca-simulator; Bain Sova-shaped → /bain-sova. Everything is open for seven days, no card; then $120 for a recruiting season or $49 a month if you keep going.
- Score any paid alternative with the fidelity table before you checkout.
- Spend the remaining prep on the skill the diagnostic marked weakest—often exhibit math or forward decisions—using /drills/math or /drills/charts, not a second firm's logo pack.
Frequently asked questions
What is the best MBB online assessment simulator?
The best one is the highest-fidelity match to the assessment named in your invitation. There is no single winner across McKinsey Solve, BCG Casey, BCG CCA, and Bain Sova or Test Gorilla.
Can one platform prepare me for McKinsey, BCG, and Bain?
One account can cover multiple formats if it actually contains those formats and you practice the one you were invited to first. A logo collage without a playable demo for your invite is not preparation.
Does CoachNed provide official firm assessments?
No. CoachNed builds original practice from public descriptions. CoachNed is not affiliated with McKinsey, BCG, Bain, Sova, TestGorilla, or any assessment vendor named here.
Should I pay for a simulator before my invite arrives?
Usually no. Use official firm pages and free demos until you know the platform name and deadline. Paying early for the wrong format is a common waste.
How long do Bain and BCG online screens take?
Bain states about 30–40 minutes for its digital assessment. BCG Mexico lists about 30 minutes for the Online Case Experience and about 30 minutes for CCA; US Associate pages list CCA at about 30–35 minutes and the online case at about 35 minutes. Your invitation overrides every guide.
Sources
- Solve, McKinsey’s assessment game — official Solve description, integrity rules, and support contacts. Checked 2026-09-24.
- Interviewing at McKinsey — Solve in the broader McKinsey interview process. Checked 2026-09-24.
- BCG Mexico careers FAQ — Online Case Experience (~30 minutes) and CCA (~30 minutes, Associates). Checked 2026-09-24.
- BCG United States Associate opportunities — CCA timing, 48-hour window, select online case (~35 minutes). Checked 2026-09-24.
- BCG case interview preparation — official emphasis on approach and reasoning quality. Checked 2026-09-24.
- Bain digital assessment — Sova vs Test Gorilla routing, ~30–40 minutes, calculator and sitting rules. Checked 2026-09-24.
- Sova Candidate Preparation Hub — vendor practice tests Bain points candidates toward. Checked 2026-09-24.
- SolveForge — free Red Rock and Sea Wolf scenarios; Pro modules. Checked 2026-09-24.
- Solve Games Guide pricing — 2-week package model and free-session claims. Checked 2026-09-24.
- MBB Gorilla — Bain TestGorilla/Sova simulators and $49 / $79 one-time pricing. Checked 2026-09-24.
- DrillCase — Casey, Solve, and Bain modules; published one-time prices and free demos. Checked 2026-09-24.