Custom Online Course Platform vs Teachable and Kajabi in 2026

A custom online course platform in 2026 costs between $25,000 and $90,000 to build. Teachable starts at $29 per month, Thinkific at $36, Kajabi at $149, and Docebo at roughly $25 per user per month with enterprise minimums. A custom build wins when monthly course revenue exceeds around $4,000 per tenant (platform fees plus transaction percentages compound fast), when you white-label the product for B2B resale, or when you embed AI features — auto-grader, quiz generator, AI tutor, automatic transcription — that off-the-shelf platforms still do not handle seriously.

By Pedro Corgnati — founder of SystemForge, full-stack developer with over 8 years building custom software for SMBs. I've shipped white-label LMS platforms with AI for corporate training consultancies and track the B2B EdTech market closely.

This article is the side-by-side that the market still lacks in 2026: real pricing, AI depth, white-label B2B reality, and the US sales tax complications that marketing-led comparisons tend to skip.

What Teachable, Thinkific, Kajabi and Docebo actually cost

Teachable sits in the middle of the creator market. Pro plan at $59/month with 5% transaction fees, custom domain, certificates, basic quizzes, drip content. The interface is simple and the onboarding is fast. The catch is sales tax — Teachable can collect through Stripe but does not act as Merchant of Record (MoR) for US state nexus calculations. You handle Wayfair compliance yourself.

Thinkific offers feature parity with Teachable plus better theme customization. Business plan at $149/month removes transaction fees and adds live groups, community and API access. Same sales tax reality as Teachable.

Kajabi is the right pick when you sell a funnel instead of a course: landing pages, email sequences, pipelines, checkout, and course delivery in one product. More expensive ($149-399/month) but eliminates the Mailchimp + Stripe + landing builder stack. Vendor lock-in is real — migrating out after 2-3 years is painful.

Docebo plays a different game. It's enterprise LMS, starting at around $25/user/month with annual minimums that translate to $25,000+. SAML SSO, SCORM, xAPI, advanced reporting, multi-tenant white-label. For a corporate academy with 500+ learners and structured training requirements it's serious software. For a solo creator or small consultancy it's overkill.

When custom genuinely wins

This is not a pricing decision. It's a business model decision. Three scenarios tilt the math toward building your own.

White-label B2B resale

If your model is licensing the platform to other companies with their own branding — training consultancy reselling to its enterprise clients, franchise network wanting centralized onboarding, corporate academy serving multiple business units — off-the-shelf products punish you on white-label. Teachable offers it only in the Enterprise plan with steep annual fees and tenant caps. Thinkific Plus likewise. Docebo handles multi-tenancy well but at enterprise pricing.

A custom platform architected for multi-tenancy (one codebase, many clients, each with their own subdomain, SSL, branding and data isolation) keeps 70-85% margin on licensing. At $3,000-15,000/month per client tenant and 5-15 active tenants, payback on a $80,000 build lands in 12-18 months. After that the product is yours.

Enterprise clients demanding SSO and HRIS integration

Selling to companies above 500 employees surfaces predictable requirements: SAML or OIDC SSO against Okta or Azure AD, group sync from Workday or BambooHR, completion webhooks to the HRIS, SCORM 1.2/2004 and xAPI (Tin Can) for LMS content imports, detailed audit logs for compliance training. Teachable Enterprise handles SSO but not deep bidirectional HRIS integration.

Custom implements exactly what the enterprise buyer asks for — which becomes a sales argument to justify a higher monthly license.

AI features worth paying for

This is where 2026 draws a real line. Teachable and Thinkific have no native AI that materially changes the learner experience. Kajabi has creator-side helpers (generate course description, outline, email subject) but nothing for the student. Docebo has AI features locked behind enterprise pricing.

A custom build integrates Claude, GPT-4.1 or Gemini directly to deliver:

• Auto-grader for written responses: an LLM scores free-text answers against a rubric, returns a score and feedback. Confidence-based routing: high confidence applies the grade automatically, medium queues for human review, low requires mandatory review. Cost per response at 2026 pricing is $0.02-0.08.
• Automatic quiz generation: take the lesson transcript, extract topics, generate 5-10 multiple-choice questions with per-option feedback. The best implementations use semantic chunking plus a second-pass quality filter.
• AI tutor with RAG: in-course chat that answers only from your course material, citing the specific lesson where the answer lives. Requires a vector database (pgvector on Postgres, Pinecone or Qdrant) at $150-500/month. API cost $0.01-0.05 per question.
• Video transcription and search: Whisper runs at $0.006 per minute. A 200-hour catalog transcribes for $72. Students search "SLA in SaaS contract" and jump to minute 23 of lesson 4.
• Adaptive learning paths: collaborative filtering plus learner embeddings suggest the next lesson or next track.

These features shift perceived value from "website with videos" into a proper product and justify a higher B2B license. If you're weighing the broader build-versus-buy question, the micro-SaaS build guide covers the commercial math from a different angle, and HubSpot versus custom CRM applies the same logic to the CRM layer.

Real 2026 pricing tiers for custom

Three concrete scope tiers I see in practice:

Scope	Investment	Timeline	What it ships
MVP white-label	$25,000-45,000	3-4 months	Multi-tenant base + video + quizzes + certificates + 1 AI feature (auto-grader or tutor)
Full + AI	$50,000-80,000	5-7 months	MVP scope + AI tutor + auto-grader + auto-quiz + transcription + gamification
Enterprise white-label	$80,000-150,000	7-10 months	Full scope + SAML SSO + HRIS integration + SCORM/xAPI + advanced reporting + 99.9% SLA

These numbers include design, development, QA and deploy. They don't include ongoing infrastructure — Vercel, Mux, Clerk, LLM APIs and database costs land between $1,500-8,000/month depending on learner volume. Plan 10-20% of the initial build per year for maintenance, model updates (LLMs shift every 6 months) and minor features.

Break-even math that actually holds

Scenario 1 — Solo creator selling a course. Teachable Pro at $59/month plus 5% on sales. With $4,000/month of course revenue you pay $259/month ($59 base + $200 in transaction fees), or $3,108/year. A $40,000 custom build pays back in roughly 13 years — effectively never. Stick with off-the-shelf.

Scenario 2 — Training consultancy licensing to 5 B2B clients. Five clients at $5,000/month each = $25,000/month in revenue. Teachable Enterprise doesn't realistically serve 5 branded tenants without a custom annual contract at similar cost. A custom build at $80,000 pays back in 3-4 months of incremental revenue at 70% margin on licensing. And the product is yours, not rented.

Scenario 3 — Corporation training 2,000 internal employees. Docebo at $25/user/month = $50,000/month = $600,000/year. A custom build at $100,000 plus $30,000/year maintenance plus $20,000/year infrastructure = $150,000 first year, $50,000/year steady state. Break-even in 3 months, annual savings of ~$450,000.

The stack I ship to production

• Frontend: Next.js 15 App Router on Vercel. Hybrid rendering (SSG for public catalog, SSR for learner dashboard, React Server Components for admin panels).
• Backend: Next.js Route Handlers for synchronous work, Inngest or BullMQ for AI jobs (transcription, auto-grading, quiz generation).
• Database: PostgreSQL (Supabase or Neon) with pgvector for RAG.
• Video: Mux for ingest, adaptive transcoding and player. Roughly $0.006 per minute encoded plus storage and bandwidth, typically $0.02-0.04 per hour watched.
• Multi-tenant auth: Clerk with organizations, or WorkOS for enterprise SAML/OIDC.
• AI: OpenAI (Whisper, GPT-4.1) and Anthropic (Claude Sonnet) via API with provider fallback for reliability.
• Storage: S3 or Cloudflare R2 for uploads, PDFs, generated certificates.
• Payments: Stripe with per-tenant subscriptions for B2B licensing, plus one-time for direct course sales.

Team: 1 tech lead + 2 developers + 1 UX designer. Smaller teams can ship but not in 6 months.

US sales tax reality

Teachable and Thinkific don't act as Merchant of Record. You handle sales tax compliance yourself — which after the Wayfair decision means tracking economic nexus in every US state (thresholds vary, typically $100,000 revenue or 200 transactions per state per year). At low volumes this is manageable. Past 5-6 states it gets painful.

Two solutions in a custom build:

1. Stripe with Stripe Tax ($1.00 per transaction). Automates US state sales tax calculation and collection. You still file returns in each state where you have nexus.
2. LemonSqueezy as MoR. Takes 5% + $0.50 per transaction but acts as Merchant of Record — it handles sales tax everywhere. For VAT OSS on EU sales, LemonSqueezy is also the simpler path.

If you sell to US + international, LemonSqueezy is the low-ops choice. If you're volume-heavy on US only, Stripe Tax is cheaper at scale.

FAQ

At what monthly revenue does custom beat Kajabi? For a solo creator: never, realistically. Kajabi's value is integrated marketing, not just the course. For a consultancy reselling to 3+ enterprise clients at $5,000+/month each, custom pays back within a year.

Can I use Stripe directly or is an MoR better? Stripe direct is cheaper per transaction (~2.9% + $0.30) but you own tax compliance. LemonSqueezy as MoR is 5% + $0.50 and takes tax off your desk. US-only sellers with good finance ops save with Stripe; international or solo operators win with LemonSqueezy.

How much does HLS video CDN cost per 1,000 learners? With Mux: an average learner watches 8-12 hours/month. 1,000 learners = 10,000 hours/month at ~$0.03/hour = $300/month. Add $0.006/minute for new encoding (negligible after initial catalog upload). Self-hosting via Bunny.net Stream is cheaper ($0.005-0.015/hour) but more operational overhead.

AI tutor: OpenAI, Anthropic, or open-source — what's best value? Claude Sonnet has the best cost-to-quality ratio for RAG-style tutoring in 2026. GPT-4.1 is marginally better in English, worse in many other languages. For scale, route easy questions to GPT-4.1-mini or Claude Haiku and escalate to larger models only on complex ones. Self-hosted open-source (Llama 3.3, Qwen 2.5) is viable for high-volume and gives you zero API cost, but you trade that for GPU ops.

Is Docebo worth the enterprise price? Only if you have 500+ learners, serious SCORM/xAPI compliance requirements and integration with a full HR tech stack. For anything smaller, Docebo is overkill and you'll pay for features you never use.

How do I handle sales tax for US + international learners? Simplest: LemonSqueezy as Merchant of Record. They handle US states, EU VAT OSS, UK VAT, Canadian GST/HST. You pay the 5% fee. For volume sellers, Stripe Tax + manual OSS registration is cheaper but requires ongoing compliance work.

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If you're deciding between off-the-shelf and a custom LMS and want a second opinion on scope and break-even before you sign with anyone, message me on WhatsApp — no pitch, no commitment. Or see the custom systems service.