Learzo's answer

• You own what you buy. Every course is a one-time purchase with lifetime access. No subscription to cancel, no expiring "access window" — your courses are yours forever, like a book.
• Curation, not catalog. Instead of 250,000 random courses (Udemy) or a closed subscription bundle (MasterClass), Learzo hand-picks a small set of legit courses from the world's best teachers. Every listing is vetted before it goes live.
• Real instructors with real authority. Tony Robbins, Russell Brunson, Vanessa Van Edwards, Charlie Houpert, CopyHackers, Patrick Nill — each course on Learzo is built by someone who has actually done the thing they're teaching.

We're betting that course buyers want a "shop" experience like Apple's Today tab — not a Netflix experience or an open marketplace race-to-the-bottom.

Calcumber's answer:

• Easy to use calculator notebook
• From simple arithmetic to advanced engineering with units
• Installation optional
• Send calculation link with full privacy
• Embed calculation templates, exercices and soultions in documents or interactively in web pages

Learzo's answer

The case against each major alternative:

• vs MasterClass ($180/yr subscription): Lose access the moment you cancel. With Learzo, the course stays yours forever — buy once, own it.
• vs Coursera ($399/yr Plus): Same problem — rented education. Plus their catalog is mostly recycled university lecture material, not practical business training.
• vs Udemy (open marketplace): 250,000 courses with no quality bar. Inflated ratings, the "Become a millionaire in 30 days" problem. Learzo's small curated catalog removes the decision fatigue.
• vs Skillshare: Same subscription lock-in, mostly creative courses, no real business depth.
• vs buying direct from creators: Direct stores work, but you have no discovery path until you already follow the instructor. Learzo gives you the "Pitchfork for business education" — independent curation you can trust.

Net: own your courses + trust the catalog. That's the whole pitch.

Calcumber's answer:

• Sharing calculations and embedding them in documents or web pages is perfect for education.
• Natural unit support, just include them in your expression and Calcumber handles it.
• Free and easy access to thermodynamic fluid-properties.

Learzo's answer

Three overlapping personas:

• The frustrated subscription escapee. Has tried MasterClass, Coursera, Skillshare — got tired of paying monthly and losing access the moment they cancel. Wants ownership, not rental.
• The serious self-improver. Buys $300-$1000 courses regularly, has spent hours researching whether "Course X" is worth it. Wants a trusted curator who's already done the vetting.
• The indie operator. Founders, freelancers, agency owners, traders, course creators, and copywriters who need practical skill upgrades fast — not academic theory.

What they share: they value time (so they trust curation), ownership (so they reject subscriptions), and practical depth (so they prefer one $497 course from a real practitioner over 50 cheap courses from anonymous instructors).

Calcumber's answer:

• The notebook-style calculator is great for everybody who wants more than just a single line calculator.
• The sharing and embedding features make it Calcumber very well suited for teachers and students. The power of consistently using units is shown immediatly.
• Engineers will like the unit support, sharing calculations with collegues and if needed the built-in fluid properties calculation.

Learzo's answer

Learzo started as a personal frustration. After buying online business courses across MasterClass, Coursera, Udemy, and 20+ creator-direct platforms over 8 years, the pattern became impossible to ignore:

• Subscription platforms held my education hostage. The moment I cancelled, courses I'd "completed" vanished from my dashboard.
• Open marketplaces (Udemy) were a flooded mess. 250,000 courses, fake reviews, no way to know what was actually worth the time.
• Direct creator stores were honest but scattered. No central discovery, no quality signal, no shared trust layer.

There was no "Apple Store" for online business education — a curated, owned, trusted catalog. So I built it. Started with 9 hand-picked courses from instructors I'd personally bought from and could vouch for (Tony Robbins, Russell Brunson, Vanessa Van Edwards, CopyHackers, Charlie Houpert). Adding more on a strict curation review every month — quality bar first, catalog size second.

Bootstrapped, solo-founded, currently in soft-launch phase. Public launch in mid-2026.

Calcumber's answer:

When starting for a Master of Advances Study in Energy Systems, I was looking for a suitable state-of-the-art calculator. Then I built my own Calculator Calcumber and now the Eastern Switzerland University of Applied Sciences is using Calcumber for teaching students in thermodynamics.

Learzo's answer

Modern Next.js stack, optimized for SEO and conversion:

• Frontend: Next.js 16 (App Router), React 19, TypeScript 5, Tailwind CSS v4, Radix UI
• Backend: Next.js API routes + Drizzle ORM
• Database: PostgreSQL (Supabase)
• Payments: Stripe, PayPal, Coinbase Commerce (crypto)
• Email: Nodemailer + Mailgun + MJML templates with custom automation engine
• Search: Meilisearch
• Hosting: Docker on dedicated VPS, Cloudflare CDN edge
• Analytics: GA4, PostHog, Sentry
• Page Builder: ChaiBuilder for editorial pages

Deployed via a hardened deploy pipeline with automatic Cloudflare cache purging and ISR revalidation. Built solo by the founder — no engineering team, just clean modern tooling.

Calcumber's answer:

HTML, CSS, TypeScript, PWA, CoolProp

Learzo's answer

Learzo is in soft-launch phase (public launch mid-2026), so the customer base is still early-stage and not yet public. Instead, here's the more meaningful answer — the biggest instructors whose courses are sold through Learzo:

• Tony Robbins (Business Mastery Program)
• Russell Brunson (Course Secrets)
• Vanessa Van Edwards (People School)
• Charlie Houpert (Charisma University)
• CopyHackers / Joanna Wiebe (Copy School)
• Patrick Nill (TTT Mentorship — trading)
• Sunny Lenarduzzi (YouTube for Bosses 3.0)
• Richmond Dinh (Tiny Challenge Course)
• William Souza (AIA Premium Method)

Customer testimonials and case studies will be added as the post-launch base grows. For early access to current customer breakdowns, reach out via the contact page.

Calcumber's answer:

Eastern Switzerland University of Applied Sciences