COMPARISON

Kaizer vs Harbiz.

Up-to-date comparison between Kaizer and Harbiz: adaptive AI, nutrition, support and price. Honest about where each wins.

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QUICK ANSWER

In one sentence.

Harbiz and Kaizer are both Spanish-language coaching platforms. The short version: Harbiz only generates; Kaizer adapts. Harbiz has a solid all-in-one product for individual wellness pros who need nutrition + billing + basic branding. Kaizer wins if you want weights and reps to update automatically after every session the client logs, or need prices shown in USD and charged in pesos in LATAM.

COMPARISON MATRIX

Side by side.

·	Kaizer	Harbiz
Adaptive AI	Yes — adjusts weights and reps after every logged session (sets, RIR, 1RM)	No — generates plans with AI, doesn't adapt them
Local-currency billing	Shown in USD, charged in pesos	Local-currency billing available
Nutrition	Out of scope — training/programming only	Yes, includes nutrition module (limited food DB per reviews)
Free plan	Free forever up to 3 clients, no card	14-day trial
Native language	Rioplatense + neutral Spanish + English	Neutral Spanish (Spain)
Focus	Training-only with real adaptive AI	All-in-one wellness (PT + nutri + physio + yoga)
White-label app	Included in Pro	Expensive add-on (~$219/mo APP plan)

WHERE KAIZER WINS

Four reasons to pick Kaizer over Harbiz.

Each point ties back to a concrete limitation of the compared product.

Automatic AI adaptation, not just generation.

Harbiz uses AI to generate initial plans — good for getting started quickly. But once generated, the plan stays. Kaizer takes every workout the client logs, recalculates the estimated 1RM with NSCA tables and adjusts the weights and reps of upcoming sessions. You choose whether it runs unattended or as a suggestion to approve. The difference between 'I used AI once' and 'my routine is adapting in real time to the client'. The AI is optional — turn it off anytime; you keep the final say.

Focus on what matters: programming.

Harbiz tried to be all-in-one: training + nutrition + physio + yoga. That broadens the TAM but dilutes focus — and reviews confirm it (CRM 'unusable', limited food DB, weak mobile planning UX). Kaizer is deliberately training-only. We do the core thing better than anyone and leave nutrition to specialized tools.

LATAM-native team.

Harbiz is Madrid; Spanish is neutral (Spain). Kaizer is Buenos Aires; Spanish is Rioplatense + LATAM. LATAM-hours support, native copy, local examples. A small detail that makes a difference with clients in Argentina, Chile, Colombia, Peru, Mexico.

WHERE HARBIZ WINS

Where Harbiz still wins.

If you need an all-in-one product that includes nutrition + training in one place and you work 100% in Spain with individual clients (no gym, no multi-coach), Harbiz is reasonable. 6+ years, €8.4M+ raised with Octopus Ventures, 6,000+ pros on platform. If you want automatic load adaptation or LATAM-native presence, Kaizer.

MIGRATION

We migrate you from Harbiz to Kaizer in under 48 hours.

Our team handles the whole migration for you in under 48 hours.

Book a 15-minute call.

STEP

Give us access to your current tool.

STEP

We migrate clients, routines and history for you.

STEP

You review and publish — all in under 48 hours.

STEP

We handle the migration for you, in under 48 hours.

Our team migrates your clients, routines and history for you. No CSV exports, nothing to upload by hand. Zero downtime for your clients.

FAQ

FAQ: Kaizer vs Harbiz.

No. Harbiz uses AI to generate routines (a good starting point), but the routines are static: once created, they don't change based on client performance. Kaizer automatically adjusts weights and reps after every workout the client logs, recalculating the estimated 1RM with NSCA tables from sets, reps and RIR; the coach can let it run unattended or keep it as a suggestion to approve.

Harbiz starts around USD $19/mo (BASIC, up to 5 clients) and scales to $129/mo (PRO, up to 50) and $219/mo (APP, white-label). Kaizer has a Free plan up to 3 clients, then Starter / Pro / Unlimited with adaptive AI on all paid tiers and the white-label app included from Pro. Current pricing on kaizer.app/en/pricing.

Today Kaizer is focused on personal trainers. The gym model — multi-coach dashboard, multi-location and MAU-based pricing — is on our roadmap, not available yet. Harbiz doesn't cover it either: it's built for individual wellness pros (PT, nutritionist, physio, yoga), with no serious product for gyms with memberships, group classes, multi-location or access control.

Yes, Harbiz includes a nutrition module — useful if you need meal planning + training in one tool. Several reviewers note the food database is limited. Kaizer is deliberately training-only — we do coaching better than anyone and leave nutrition to specialized tools.

Polarized reviews — some clients rate it excellent, others terrible (reported inconsistency). Europe-hours support. Kaizer has Buenos Aires-based support with LATAM-hours coverage and a consistently high support NPS.

Yes, and we do it for you. Book a 15-minute call, give us access to your current tool, and our team migrates clients, routines and history. You review, publish, and your clients open the Kaizer app — all in under 48 hours.

Harbiz only generates. Kaizer adapts. That's the central difference: Kaizer runs the coach + AI progression loop after every session the client logs, not when the coach happens to remember to update.

May 2026. We review Harbiz pricing and features quarterly.

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