---
title: "Microsoft Dynamics 365 Alternative: Custom-Built ERP by ERPStack"
description: "Feature-by-feature comparison of Microsoft Dynamics 365 against a custom-built ERPStack system: licensing, lock-in, customization limits, and migration path."
canonical: https://erpstack.io/alternatives/dynamics-365
markdown_url: https://erpstack.io/alternatives/dynamics-365.md
publisher: ERPStack
---

# Microsoft Dynamics 365 vs. a custom-built ERPStack system

**Typical Microsoft Dynamics 365 license cost:** $20,000 - $180,000+ / year
**Lock-in risk:** High (Azure lock-in, proprietary Power Platform and Dataverse dependency)
**Modularity:** Medium (Highly integrated with Microsoft ecosystem, but complex cross-module ties)
**Customization ceiling:** High complexity (Requires certified AL/X++ developers or complex PowerApps workflows)
**Migration path:** Schema mapping from Dataverse to PostgreSQL using custom migrations

## Feature comparison

| Feature | ERPStack (custom) | Microsoft Dynamics 365 |
| --- | --- | --- |
| API Extensibility | Native GraphQL & REST | OData/Web API with limits |
| Database Access | Direct SQL & Real-time replication | Locked behind proprietary views |
| UI Customization | Full React/Tailwind codebase | Model-driven or canvas apps only |
| Multi-Tenant Architecture | Yes | No |

## Migration timeline

- **Dataverse Discovery** (2 Weeks): Analyze existing Dataverse schema, custom entities, and relationships.
- **Extraction & Mapping** (3 Weeks): Extract data using Azure Data Factory or custom scripts to PostgreSQL.
- **Validation & Integration** (4 Weeks): Map workflows and business logic into Next.js server logic.
- **Cutover** (1 Weekend): Sync final delta and switch DNS.

## Hidden costs of Microsoft Dynamics 365

- **Storage Costs:** Dataverse database storage is extremely expensive per GB once you exceed standard limits.
- **API Call Thresholds:** High volume synchronization tasks hit daily API request limits, requiring additional premium licenses.

## Why teams leave

- Migrated from Dynamics 365 to a custom ERP stack, saving over $90k/yr on storage and licensing while simplifying the mobile warehouse interface. (A regional distribution company — Skyrocketing Azure Dataverse storage fees and slow interface.)