Begleite deine Klienten end-to-end verschlüsselt
End-to-end encrypted from the start. Server never sees plaintext — only your client holds the key.
- Encrypted
- E2E
- EU-hosted
- EU-W1
- Compliant
- GDPR
- Pilot wave
- Q3 2026
What you get
Three tools, all encrypted
Verschlüsselte Pläne
Klient hält den Schlüssel.
Build cycle plans in the web. Your client sees them in the app. PepStack server only sees ciphertext.
Klient-bestätigt
Verbindung kommt nur mit aktivem OK des Klienten zustande.
Define target ranges for testosterone, SHBG, lipids. Client logs values in app, you see trend and deviation.
Audit-Log
Jeder Coach-Read ist server-side dokumentiert.
Notes attached to plans. Bidirectional. Your client replies, you see it.
Privacy by Design
We can't read your clients' data. Period.
Others promise it. We build the crypto so it can't be otherwise. Cycles, blood markers, and notes get encrypted on the client device — before they ever reach our server.
Node A
Coach
Writes the plan on the web. Encrypted locally with the client's public key.
Node ∅
PepStack server
Stores ciphertext + audit log. No plaintext, no master key.
Node B
Client
App decrypts locally with the private key. Plaintext exists only here.
What that actually means
What we don't see
Stack plans, doses, blood marker trends, notes — all ciphertext to us.
What happens server-side
Audit log of every coach read. Server code is open-source verifiable.
State of the art
Same architecture as Signal, Proton, Tutanota — crypto you can verify, not just take on faith.
Self-hosted? DPA + technical docs on request.
Pricing
One platform, three sizes
14-day free trial, cancel anytime.
For individual coaches
Solo
89 €/month
Up to 10 clients
- End-to-end encrypted records
- Cycle editor
- Blood marker targets
- Bidirectional notes
- Audit log
Growing practice
Pro
199 €/month
Up to 40 clients
- End-to-end encrypted records
- Cycle editor
- Blood marker targets
- Bidirectional notes
- Audit log
- CSV export
- Priority support
Team setups
Agency
449 €/month
Up to 999 clients
- End-to-end encrypted records
- Cycle editor
- Blood marker targets
- Bidirectional notes
- Audit log
- CSV export
- Priority support
- Team seats
- White-label option
Roadmap
What's already in, what's coming next
Already in
- Encrypted shared records
- Cycle planner with stack-builder
- Blood marker targets
- Bidirectional notes
- Server-side audit log
Pilot phase
- Coach connect via 8-digit invite
- First pilot coaches onboarding
- Real coach-client feedback loops
- Stripe-Live cutover
Coming next
- Training + nutrition plans
- Weekly check-ins (photo, weight, mood)
- Public coach directory
- Coach team-seats (Agency tier)
Common questions
Frequently asked
- No-one but you and your client. Cycles, blood markers and notes are encrypted on the client device before reaching the server. Even with a database leak: ciphertext only.
Be there when Coach Mode launches
We open access in small waves. Drop your email and we'll reach out as soon as we have a seat for you.