This guide is built for senior operators who need to act fast in 2026. Each chapter ends with a "what to do this week" callout, and every claim is sourced -- internal Dcrayons engagement data, named vendor reports, or industry benchmarks. No fluff, no vendor promo.

1. Why ABP for B2B SaaS
2. Modular monolith: organising the .sln
3. Tenant isolation: schema vs row vs database
4. Identity + permissions
5. CQRS + DDD patterns
6. Background workers + Hangfire
7. EF Core migrations at scale
8. LeptonX vs custom UI
9. API design: REST + GraphQL
10. Observability + logging
11. Production checklist
12. About Dcrayons + next step

Who this is for

Founders, CMOs, VPs of Marketing, agency leads, and senior operators working on programs scoped above Rs 25 lakh per quarter. If you are evaluating Dcrayons for a 2026 program, this is the reference document for the conversation.

How to use it

Skim the table of contents above. Jump to the chapter most relevant to the gap you are working on. Bring screenshots, raw numbers, or your last Dcrayons Score readout to the scoping call -- this guide will not replace the conversation, but it will sharpen the questions you bring.

ABP Headless on .NET 9: Building Multi-Tenant SaaS ships as a designed PDF with diagrams and worksheets. Request the download via the form on the right; we email it inside one business day.

Table of contents

Who this is for

How to use it

ABP Headless on .NET 9: Building Multi-Tenant SaaS

Read the full guide