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Kaizer vs Trainerize
Up-to-date comparison between Kaizer and Trainerize: pricing, language, adaptive AI, LATAM billing, client experience and support. Built to help you decide, not to sell.
Kaizer and Trainerize are both coaching platforms. Trainerize is the historical English-language leader (Canada, 12+ years on the market, 100K+ coaches) and works very well if your client base is 100% in the US/UK/AU/CA and you only coach in English. Kaizer is the choice if you want the plan to re-program itself: it automatically adjusts weights and reps after every workout the client logs (Trainerize generates the routine once and never touches it again). On top of that, prices are shown in USD and charged in pesos, and the product works perfectly in Spanish. The AI is optional — turn it off anytime; you keep the final say.
Updated: June 13, 2026
Side by side.
TrainerizeLanguageFull Spanish support (Rioplatense + neutral) + EnglishNative English. Translated Spanish.Local-currency billingShown in USD, charged in pesosUSD only / Stripe USAdaptive AIAdjusts weights and reps after every logged session (sets, RIR, estimated 1RM)Generates routines with AI, doesn't adapt them from real performanceClient experienceYour clients train in the polished, native Kaizer appOwn app, or branding as an expensive add-on (Trainerize.me Custom Branding)SupportFull Spanish support, fast response in your hoursEnglish. North-American business hours.Free planFree forever up to 3 clients, no card30-day trial, card requiredLearning curveModern UX, single dashboard, guided onboardingRobust but complex. Investment required.1000+active trainers
+120,000routines created
20+countries in operation
1,500+exercises with video
Where Kaizer wins over Trainerize.
Real automatic adaptation, not static templates.Trainerize generates routines with AI — and that's where the story ends. The plan stays until you manually change it. Kaizer takes every workout the client logs, recalculates the estimated 1RM with NSCA tables, and updates the weights and reps of upcoming sessions. You choose whether it runs unattended or as a suggestion to approve. Result: fewer plateaus, better adherence, higher retention.
Prices shown in USD, charged in pesos.We show prices in USD so they stay clear and stable, and billing happens in pesos: your clients pay in their local currency, with no FX surprises. Trainerize forces Stripe US and charges in dollars — prohibitive for many clients in LATAM.
Full Spanish support that works perfectly.Trainerize is translated (sometimes literal, sometimes awkward). In Kaizer, the whole product and support work perfectly in Spanish — terminology, tone, examples, help. Not a minor detail when clients are considering trusting you with their entire team.
Where Trainerize still wins.
If your client base is 100% in the US, UK, Australia or Canada and you only coach in English, Trainerize is reasonable: 12+ years of iteration, a huge community, deep integrations with MyFitnessPal, Garmin, Fitbit and Apple Health (Kaizer doesn't have those native connectors yet), and a support team that knows the English-speaking market. Trainerize also ships an integrated habit-tracking and nutrition stack — things Kaizer keeps out of scope to focus on training programming. If you want automatic load adaptation after every session — or you coach in Spanish and bill in local currency — Kaizer is the right call.
Compare it yourself in a demo.
When to choose Trainerize
Your client base is 100% in the US, Canada, UK or Australia and you only coach in English.
You need native integrations with MyFitnessPal, Garmin, Fitbit and Apple Health.
You value 12+ years of iteration and a huge community in the English-speaking market.
You lean on an integrated habit-tracking and nutrition stack (out of Kaizer's scope).
When to choose Kaizer
You want real automatic adaptation: weights and reps update after every session the client logs, not static templates.
You bill in LATAM: prices are shown in USD and charged in pesos.
You coach in Spanish and want a product and support that work perfectly in your language.
You prefer a forever-free plan (up to 3 clients, no card) over a card-required trial.
How to migrate from Trainerize 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 Trainerize.
No. Trainerize has a feature to generate initial routines with AI (Trainerize AI), but the routines are static: once created, they don't change based on real client performance unless the coach manually edits them. Kaizer recalculates each client's estimated 1RM after every workout they log (using sets, reps and RIR) and updates the target weights and reps of upcoming sessions; the coach can let it run unattended or keep it as a suggestion.
Trainerize starts around USD $9–$11/month for up to 5 clients and scales by client count, with Custom Branding adding significant cost. Kaizer has a Free plan up to 3 clients, then Starter / Pro / Unlimited with the adaptive AI included on all paid tiers. 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. Trainerize is likewise built for individual trainers: it has a Studio plan for small teams but it isn't a B2B2C product designed for gyms with memberships, multi-location and chain dashboards.
Trainerize offers chat and email support, mostly in English. The product is partially translated to Spanish but not native. LATAM-hours support is limited. Kaizer responds fast in your hours, and the whole product and support work perfectly in Spanish.
Yes — and you don't do it alone: our team handles the entire migration for you in under 48 hours. You book a 15-minute call, give us access to your current tool, and we migrate clients, routines and history. Then you review and publish. No spreadsheet exports, nothing loaded by hand.
If your client base is 100% US and you work only in English, Trainerize is a reasonable choice given product maturity and native integrations with Garmin / MyFitnessPal / Apple Health. Kaizer is clearly better if you want automatic post-session weight and rep updates instead of static templates — and it helps if you coach in Spanish or bill in local currencies.
The Kaizer app: a polished, native experience for your clients — without paying for a branding add-on like Trainerize.me Custom Branding (which is expensive on Trainerize). The focus is on your clients training comfortably and you programming fast, not on standing up a separate app.
May 2026. We review Trainerize pricing, features and positioning quarterly. If you find anything out of date, write us at support@kaizer.app.
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