The 4 criteria that actually matter
Before any comparison, fix the criteria. These four are what separate a tool that measurably moves your score from one that just makes you feel productive.
Realism
Does it match the 2026 mini-game format — Sea Wolf, Red Rock, Sustainable Future Lab? Most legacy tools still simulate the 2019 Imbellus ecosystem case, which is no longer on the assessment.
Scoring fidelity
Does the feedback you get correlate with how McKinsey actually scores? Tools that give you a number with no per-game breakdown can't tell you what to fix.
Replay variety
How many fresh seeds / scenarios? A simulator with 3 scenarios you replay 10 times each teaches you the scenarios, not the format. Variety is what builds genuine pattern fluency.
Price-to-runway fit
A $300 course makes no sense if your invite is in 5 days. A $0 free tier makes no sense if you have 6 weeks and need 20 reps. The right price depends on the runway.
The comparison table
Six tool categories, scored on what matters. Verdicts are deliberately mixed — there's no single winner because the right tool depends on your situation.
| Tool | Type | Format realism | Scoring | Free tier | Price | Best for |
|---|---|---|---|---|---|---|
| SolvePrep | Simulator-first | 2026 format · all 3 games | Per-game breakdown | Yes · 1 play per game | Free · $29 · $79 | First-attempt + retake candidates |
| PrepMatter | Simulator-first | Partial 2026 coverage | Score only | Limited demo | $$ subscription | Candidates wanting alt simulator |
| IGotAnOffer / RocketBlocks | Course-first | Theory + video only | n/a | Some free content | $$–$$$ | Full consulting prep, not Solve-only |
| MConsultingPrep | Course + materials | Mixed — strong on PSG theory | n/a | Limited | $$ | Reading-heavy learners |
| YouTube playthroughs | Free | Mostly legacy Imbellus | n/a | All free | $0 | Initial format orientation only |
| 1:1 coach | Coaching | Depends on coach | Human review | No | $200–500/hr | Retakes + behavioural prep |
Price scale: $ = under $50 · $$ = $50–150 · $$$ = $150+. Last reviewed May 2026.
Simulator-first tools
Simulators are the highest-impact category for Solve prep specifically — they're the only format that produces the pattern fluency and habit calibration that actually move scores. Two players matter in 2026:
PrepMatter
Established simulator with a strong reputation from the Imbellus era. 2026 coverage has historically lagged updates — verify current scope before subscribing. Subscription-based pricing rather than one-time tiers.
Course-first tools
IGotAnOffer, RocketBlocks, MConsultingPrep, and Hacking the Case Interview all fall into this bucket. They're built around video lectures, structured reading, and case interview drills — not around Solve simulation.
Where they win: if you need full consulting interview prep (case-style fit + behavioural + Solve), a single course can cover the whole journey more efficiently than buying point solutions.
Where they don't: for Solve-specific prep, video content is no substitute for actually playing the mini-games under timer pressure. Courses are a weak primary tool for Solve and a fine complement to a simulator.
If you go this route, use the course for theory and pair it with at least one simulator free play. The digital assessment guide covers the 2026 format end-to-end if you want a free orientation first.
Free options
You can get a long way for $0. The catch is knowing which free resources are worth your time and which actively hurt you.
Worth it: the SolvePrep free tier (1 play per game), the guide content on this site (entirely free), the free PSG simulation guide, and a small handful of Reddit threads where 2024–2026 candidates describe their actual experience.
Skip: YouTube playthroughs from 2019–2022. They're nearly all of the old Imbellus ecosystem case (different traits, different scoring, different format). Watching them trains habits you'll have to unlearn.
If your budget really is $0, do the diagnostic free play, read the guide, and run the free plays one more time the week of your assessment. That's a 70%-of-the-way prep for nothing.
1:1 coaching
1:1 coaching with an ex-McKinsey consultant typically runs $200–500/hr. It is genuinely high-value in two specific cases — and over-spend in most others.
Worth it for:
- Retakes. A coach can diagnose what went wrong on attempt one in a way no simulator can — especially behavioural or pacing issues that don't show up in automated scoring.
- Behavioural prep alongside Solve. Coaching is the right tool for the case-style fit and PEI components that come before and after Solve in the McKinsey process.
- Risk-averse premium buyers. If the offer is genuinely life-changing and you have the budget, the marginal score gain from 2–3 coach sessions on top of a simulator is positive.
Not worth it for: first-attempt candidates on a budget, time-crunched candidates (no scheduling room), and anyone who hasn't yet done a diagnostic free play — you'd be paying a coach to diagnose what 90 minutes of free practice would tell you.
Recommendation by candidate type
Find the persona closest to you. Each one names the specific tool stack we'd actually recommend — including when the right answer is "don't buy anything extra."
First-attempt · 2+ weeks runway · limited budget
Most common buyer. You have an invite, some time, and want one good tool.
Recommendation: Start with SolvePrep free — one diagnostic play of each game, then upgrade to Elite ($79) if you need more reps. Pair with the 7-day prep plan. Skip coaching.
Retake after a fail
You took Solve, didn't pass, and have a second invite or are reapplying.
Recommendation: SolvePrep Elite ($79) plus one 1-hour coaching session ($200–300) for failure diagnosis. The coach helps you find what went wrong; the simulator gives you the reps to fix it. Read the 4-phase methodology and lean hard on Phase 1 (diagnose).
Time-crunched · 1 week or less
Invite landed on short notice. You can't afford slow learning.
Recommendation: SolvePrep Elite ($79). Skip courses (too slow to consume) and coaching (no time to schedule). Run the compressed 3-day version of the prep plan.
Premium / risk-averse buyer with budget
You want every advantage and have $1k+ to spend.
Recommendation: SolvePrep Elite ($79) + 2–3 sessions with a reputable consulting coach (~$600–1,500). Use SolvePrep for reps, the coach for behavioural prep and post-rep critique. Don't add a course — it's mostly redundant with what the coach gives you.
Free-only budget
Not willing to pay anything. Want to know what's actually achievable.
Recommendation: SolvePrep free tier (1 play per game) + read every page on this site + the free PSG simulation guide. Skip YouTube playthroughs of the old Imbellus format — they teach habits you'll have to unlearn for 2026.
FAQ
Are paid McKinsey Solve prep tools worth it?
For most first-attempt candidates, yes — but only one tool, not a stack of three. The marginal score gain from a single good simulator (which gives you fresh seeds and per-game feedback) typically exceeds the cost. Layering courses + simulators + coaching is over-spend for most candidates and produces diminishing returns past one purchase.
Is the free SolvePrep tier enough?
For a diagnostic pass (one free play of each mini-game) and for working through the guide content, yes. If you need more than 1 free play per game for repetition or want detailed scoring feedback, you'll need the paid Elite tier ($79). Most candidates start free, then upgrade only if they hit the limit.
How does SolvePrep compare to PrepMatter or IGotAnOffer?
SolvePrep is simulator-first and 2026-format-current with a real free tier. PrepMatter is also simulator-first but has historically lagged on the 2026 mini-game updates. IGotAnOffer is course-first — strong on case-interview theory, weaker on Solve-specific simulator realism. Different tools, different jobs. Use the comparison table on this page.
Do I need both a simulator and a coach?
Almost never for first-attempt candidates. Coaching is high-value for retakes (where someone needs to diagnose what went wrong with the first attempt) and for candidates with specific behavioural prep needs alongside Solve. For pure Solve prep on a first attempt, a simulator alone is usually enough.
What if I fail with the tool I picked?
Failing McKinsey Solve isn't usually a tool problem — it's an allocation problem (under-drilling Red Rock) or a logistics problem (cramming, mobile practice). Read the how-to-prepare methodology and the tips page before blaming the tool. That said: if you used only free YouTube content and failed, a paid simulator for the retake makes sense.
Start free. Upgrade only if you need to.
Every recommendation on this page starts with a free diagnostic. Take one play of each mini-game, see where you actually stand, and decide from there whether you need to spend anything at all.