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 coaching platforms. Trainerize is a mature option with a broad ecosystem for training, habits, nutrition, payments and integrations. Kaizer differs through assisted progression: it adjusts weights and reps after every logged session; Trainerize documents an initial AI workout builder, but not that same session-by-session flow. Kaizer works in Spanish, English and Portuguese and bills the subscription in local currency where available.
Updated: August 10, 2026
Side by side.
TrainerizeLanguageFull Spanish support (Rioplatense + neutral) + EnglishNative English. Translated Spanish.Local-currency billingShown in USD, charged in pesosPlans and add-ons in USD; integrated Stripe paymentsAdaptive 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 planBasic for up to 3 clientsPermanent Free plan for 1 client + 30-day no-card trialLearning curveModern UX, single dashboard, guided onboardingRobust but complex. Investment required.Payment trackingState per client, reminder and history; does not process the moneyCharges the client (Stripe, USD 10/mo add-on)Bringing what you already haveImports PDF, DOCX, XLSX, CSV, TXT or a photo (up to 500 KB)Built in its own editor; no file importWhere Kaizer wins over Trainerize.
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 stack — something Kaizer keeps out of scope to focus on training and nutrition. 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 habit tracking and on native MyFitnessPal, Garmin, Fitbit or Apple Health connectors (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 want to start on Basic at USD 5/month for up to 3 clients; Trainerize has a permanent Free tier, limited to 1 client.
Move from Trainerize to Kaizer with guidance.
The Kaizer team guides you through onboarding and initial setup. The exact scope depends on the data available from your current tool.
Book a short conversation with the team.
We review which data you need to bring over.
We guide you through setting up clients and routines in Kaizer.
You review the setup before inviting your clients.
If you decide to switch, the Kaizer team supports your onboarding and initial setup. Scope and timing are agreed based on the data available in your current tool.
Sources and methodology.
We compare each product using its public pricing and official documentation. Prices, limits, and features can change; these sources were checked on the date shown.
Reviewed: 2026-08-10
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 switches it on or off per client, and any week they edit drops out of the calculation permanently.
Trainerize has a permanent Free plan for 1 client; Grow costs about USD 10/month for 2 clients and Pro starts around USD 25/month for 5, with higher prices by seat count and add-ons. Kaizer has Basic at USD 5/month up to 3 clients, Starter USD 19/month up to 15, Pro USD 49/month up to 50 and Arnold USD 149/month up to 500.
Kaizer focuses on personal trainers and individual programming; it does not publish membership, access-control or multi-location operations features. Trainerize does offer Studio Plus for teams and businesses with physical locations, broad seat limits and team tools.
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.
The Kaizer team guides you through onboarding and initial setup; the scope depends on the data available from your current tool.
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.
August 2026. We review Trainerize pricing, features and positioning quarterly. If you find anything out of date, write us at support@kaizer.app.
