Sleak
Our mission

We make world-class coaching accessible to every professional

Growth happens when people feel supported enough to try, safe enough to fail, and guided enough to improve. That is what Sleak is built for.

We are hiring!Join our team
Four members of the Sleak team at Bosch Connected World
Note from the founders

We started Sleak because the best sales training in the world is still the hardest to scale. A great coach can transform a rep, but no manager has time to sit in on every call, every week, for every person on the team.

So we built one that does. Sleak gives every rep a patient, expert sparring partner that’s available on any device, at any hour, and never runs out of patience. It’s the practice we always wished we’d had – and the kind that compounds quietly, conversation after conversation.

The Sleak founding team
Sleak's founders standing together in the company's office
Metrics

Company impact by the numbers

The numbers below cover what matters day to day: how quickly teams are ready, how often they can practise, and how much experience goes into every piece of feedback.

+46%
Sales performance increase
50+
Reps onboarded in 5 weeks
1,000+
Sales experts' knowledge built into every feedback loop
24/7
Practice availability, on any device

Help us build the AI coach that develops teams

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Our values

What we believe

Three principles that shape every conversation we build.

  • Practice beats theory

    Skill comes from reps, not slide decks. We make deliberate practice effortless.

  • Feedback should be fair

    Every rep gets objective, consistent coaching, not just whoever the manager had time for.

  • Built for your world

    No generic scripts. Every scenario reflects your product, market, and buyers.

Timeline

Our story so far

From a single idea to a sales-training platform trusted across Europe

  1. Sep 2025Launched Sleak
  2. Oct 2025Launched MVP
  3. Nov 2025Signed First Customer
  4. Jan 2026Hired First Employees
  5. Feb 2026Bootstrapped to 500k ARR
  6. Apr 2026Sleak Rebranding
  7. Jul 202620 Employees
Meet the team

Some faces behind Sleak

Some of the people building Sleak – and the question we work on: how does practice actually turn into skill?

  • Philipp Heideker

    Co-Founder & CEO

  • Lennard Greve

    Co-Founder & CTO

  • Till Kemper

    Founding Engineer

  • Vinzenz Maier

    Senior Account Executive

  • Marlene Bleek

    Founding GTM Manager

  • Frederik Antenbrink

    Founders Associate

  • Nela Greve

    Founders Associate

  • We are hiring!

    Explore careers
Press

What the press writes about us.

Awards, coverage and appearances – a selection. Every link goes straight to the outlet's own piece.

  • YouTube

    Sales Summit 2025 Startup Pitch – Sleak

    Dec 14, 2025

    Watch video
  • VC Magazin

    Heilbronn Slush'D 2025 Recap

    Nov 4, 2025

    View article
  • Startup Valley News

    Heilbronn Slush'D 2025: Europe's One Driving Force

    Oct 31, 2025

    View article
All coverage