Mentoring vs Coaching: Which One You Actually Need

· by Marian Kamenistak

Three months of good questions and zero decisions. That is what you get when you hire a coach and what you needed was a mentor. The cost is rarely the invoice. It is the quarter you lost.

So, the two definitions the whole argument hangs on:

Mentoring transfers experience. A mentor has sat in your seat, made the mistake you are about to make, and shortens your trial-and-error loop with moves that worked.

Coaching builds clarity. A coach asks questions until you see your own answer, and does not need your domain background. A good coach can coach a CFO and a CTO in the same week.

Different tools, different problems. The only question worth asking is which one your current problem needs.

The comparison

I include advisors because engineering leaders shop for all three under one budget line:

Mentor Coach Advisor
Brings Experience from the same seat Process and questions Judgment for the company
Typical question answered “How do I turn around my underperformer?” “What do I actually want from this role?” “Should this company reorg into platform teams?”
Needs your domain Yes. A mentor without the scars is a podcast. No Yes, across many companies
Owns the outcome You; the mentor shortens the loop You; the coach holds the mirror Shared; the advisor signs the recommendation
Fails when You need someone neutral on a non-domain problem You need concrete answers under time pressure The problem is you, not the org chart

The difference between coaching and mentoring, without the diplomacy

The coaching industry has a definition and defends it. The ICF, the largest coaching federation, holds that the client is the expert of their own life and lasting change comes from answers you generate yourself. For long-horizon personal work, they are right.

Marian Kamenistak in a 1:1 mentoring session.
A move, not a mirror: what a mentoring session actually looks like when the clock is on Thursday’s fire.

Here is where I break with it. 52% of the leaders I mentor are in their first leadership role. When your underperformer escalates on Thursday and the board call is Friday, generating your own answer is a luxury your calendar does not have. You need a map from someone who walked the street.

A move or a mirror. That is the whole decision.

Coaches like to argue with certifications: ICF, ACC, PCC. Notice what that argument quietly does. An ICF badge lets a coach take a CFO on Monday and a CTO on Tuesday. Nobody can badge their way into having run your kind of org, because in mentoring the credential is the scar tissue. That is why mentors are harder to find and why mentoring is often priced above executive coaching.

The 3-question test

  1. Do I need a move or a mirror? A move (“how do I run this reorg”) points to a mentor. A mirror (“why do I keep postponing this conversation”) points to a coach.
  2. Is the problem mine or the company’s? Yours: mentor or coach. The company’s: advisor, or a fractional CTO when it needs hands, not slides.
  3. Would domain scars change the answer? If someone who scaled 8 teams to 80 would answer differently than a smart generalist, you need the scars. That is mentoring.

In my sessions it runs in that order almost every time: moves first, mirrors later. Clarity work lands better once the fire is out, which is also why “get a coach” is premature advice for a leader whose Thursday is on fire.

What each costs

Coaching prices are mostly hidden until a discovery call. Benchmarks from the market: executive coaching commonly runs $200 to $600+ per hour in the US, roughly 180 to 550 EUR. I broke down the full range, sources included, in how much executive coaching costs.

My mentoring pricing is public, all of it: 430 EUR per 60-minute session, 2,166 EUR for a 6-session first quarter (361 EUR per session, the package discount), same rate when your company pays. Details and the under-7/10-not-billed guarantee at pricing.

Where I stand

I mentor. I built the engineering org at Mews through Series C, from 8 teams to 80, walked away from a $350k role in 2023 to do this full-time, and billed 317 sessions in year one of going solo. Now it is 3,400+ sessions with 300+ leaders in 17+ countries.

Marian Kamenistak speaking with a microphone at an Engineering Leaders Community event, hand raised mid-gesture.
Same conviction on stage as in a session: say plainly which one you’re getting.

When a session needs coaching mode, I switch and say so out loud. And when you need a mirror more than a move, I will tell you in the first session and point you to a coach. If your next quarter needs moves, that is 1:1 mentoring for engineering leaders, and the intro session is free.

Frequently asked

What is the difference between coaching and mentoring?+
Mentoring transfers experience: the mentor has held your seat and gives you concrete moves tested under fire. Coaching builds clarity: the coach asks questions until you find your own answer, and needs no background in your domain. Different tools, different problems.
Is a mentor better than a coach?+
Neither is better; they fix different problems. If you need a move under time pressure, a mentor is faster. If you need to understand why you keep avoiding a decision, a coach is the right tool. The expensive mistake is hiring one when you needed the other.
When should I pick a coach instead of a mentor?+
When the problem is clarity, not know-how: career direction, confidence, work-life boundaries, burnout patterns. If you already know WHAT to do and struggle to see WHY you avoid it, coaching is the right tool.
Can one person be both mentor and coach?+
Yes, and good mentors switch modes in practice: mentoring when you need a move, coaching when you need a mirror. What matters is that they know which mode the situation calls for and tell you which one you are getting.
How much does mentoring vs coaching cost?+
US executive coaching commonly runs $200 to $600+ per hour, roughly 180 to 550 EUR. Mentoring for engineering leaders at marian.coach runs 430 EUR per 60-minute session with public pricing, 361 EUR per session in the first-quarter pack, same rate when a company pays. Most coaches and mentors only reveal price on a call.

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