Cargando...
Ready to raiseyour standard?
Join the coaches already raising their standard with Kaizer.
Free up to 3 clients · No credit card
Cargando...
Kaizer vs Harbiz
Up-to-date comparison between Kaizer and Harbiz: adaptive AI, nutrition, support and price. Honest about where each wins.
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.
Updated: June 13, 2026
Side by side.
HarbizAdaptive AIYes — adjusts weights and reps after every logged session (sets, RIR, 1RM)No — generates plans with AI, doesn't adapt themLocal-currency billingShown in USD, charged in pesosLocal-currency billing availableNutritionOut of scope — training/programming onlyYes, includes nutrition module (limited food DB per reviews)Free planFree forever up to 3 clients, no card14-day trialLanguageFull Spanish support (Rioplatense + neutral) + EnglishNeutral Spanish (Spain)FocusTraining-only with real adaptive AIAll-in-one wellness (PT + nutri + physio + yoga)White-label appIncluded in ProExpensive add-on (~$219/mo APP plan)1000+active trainers
+120,000routines created
20+countries in operation
1,500+exercises with video
Where Kaizer wins over Harbiz.
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.
Product velocity and support that responds.Kaizer is built on modern tech with an obsessive quality bar: improvements ship fast and support answers in your hours, with a consistently high NPS. And the detail that adds up: the product works perfectly in Spanish, including with clients in Argentina, Chile, Colombia, Peru or Mexico.
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 after every session and a product that evolves fast, Kaizer.
Compare it yourself in a demo.
When to choose Harbiz
You need an all-in-one that bundles nutrition + training in one place.
You work 100% in Spain with individual clients (no gym, no multi-coach).
You value the track record: 6+ years, €8.4M+ raised and 6,000+ pros on platform.
Local-currency billing in Europe is enough for you as Harbiz already offers it.
When to choose Kaizer
You want automatic AI adaptation, not just generation: weights and reps update after every logged session.
You prefer a focus on training programming over a diluted all-in-one.
You bill in LATAM: priced in USD, charged in pesos.
You want the white-label app included in Pro, without a ~$219/mo add-on.
We migrate you from Harbiz to Kaizer in under 48 hours.
Our team handles the whole migration for you in under 48 hours.
Chat
SMSofía M.Closed today's session, last set was tough2
LRLucas R.Sure, starting the new block on Monday
Last set of bench press was toughSaw it in the log — Friday we drop to 4×6 and adjust
Step 01
Book a 15-minute call.
Give us access to your current tool.
Add client
QuickManual
First nameSofía
Last nameMartínez
Emailsofia@gmail.com
kaizer.app/i/x8f2…Copy
Invite link
Step 02
We migrate clients, routines and history for you.
Create new routine
ManualGenerate with AI
Sessions / week4
Duration8 weeks
GoalHypertrophy
LimitationsNo knee impact
Generate routine
Step 03
You review and publish — all in under 48 hours.
We handle the migration for you, in under 48 hours: clients, routines and history. No CSV exports, nothing to upload by hand. Zero downtime for your clients.
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 offers fast support in LATAM hours 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.
Related comparisons.
Kaizer vs TrainerizeThe global English-language leader. We compare pricing, language, adaptive AI, local integrations.Kaizer vs TrueCoachPremium English-language tool. Comparison on client experience, branding and unit economics.Kaizer vs Hevy CoachThe light option without a desktop. Comparison on pro features, adaptive AI, CRM.Kaizer vs EverfitEverfit is a solid all-in-one, but its AI only reformats your notes into a routine. Kaizer generates the plan and re-adjusts weights and reps after every logged session — with a Spanish dashboard and billing in pesos.See all comparisons