If you're a quality manager, training director, or accountable manager at an EASA Part 147 maintenance training organisation, choosing the right software platform is one of the most consequential decisions you'll make. The right system saves hundreds of hours per year and eliminates compliance risk. The wrong one adds complexity without solving the core problem.
In 2026, three platforms dominate the Part 147 MTO software space: AMTOS (by Aggregator Solutions), Aviatize, and TrainingManager365 (formerly known as MINT TMS). Each approaches the problem differently, and each has distinct strengths.
This article provides a fair, feature-by-feature comparison to help you make an informed decision. Full disclosure: this article is published by Aggregator Solutions, the company behind AMTOS. We've done our best to be factual and fair, but we encourage you to verify all claims by requesting demonstrations from each vendor.
The Three Platforms at a Glance
AMTOS — Aggregator Solutions
AMTOS (Aviation Maintenance Training & Operations System) is a cloud-hosted, purpose-built Part 147 platform developed by Aggregator Solutions. It focuses on the complete training lifecycle — from student enrolment through to EASA Form 148 certificate generation. Built on ASP.NET MVC with DevExpress components, it offers a multi-tenant architecture with database-per-tenant isolation.
Aviatize
Aviatize is a Danish company offering a suite of aviation training management tools. Their platform covers Part 147 training organisations as well as Part 145 maintenance organisations. Aviatize emphasises compliance tracking and regulatory document management, with a broad feature set covering multiple EASA Parts.
TrainingManager365 (formerly MINT TMS)
TrainingManager365, formerly marketed as MINT TMS, is built on the Microsoft 365 / Power Platform ecosystem. It leverages SharePoint, Power Apps, and Power Automate to deliver training management functionality within an organisation's existing Microsoft tenant. This approach appeals to organisations already deeply invested in the Microsoft ecosystem.
Feature-by-Feature Comparison
| Feature | AMTOS | Aviatize | TrainingManager365 |
|---|---|---|---|
| Part 66 module-mapped question bank | ✓ Built-in | ~ Via integration | ✗ |
| Online exam engine with auto-grading | ✓ Built-in | ~ Limited | ✗ |
| EASA Form 148 / CoR generation | ✓ One-click | ✓ | ~ Manual template |
| Attendance tracking with threshold enforcement | ✓ Automatic | ✓ | ~ Manual tracking |
| Practical assessment (P1–P9) | ✓ Built-in | ✓ | ~ Custom forms |
| Visual scheduling / calendar | ✓ Drag-and-drop | ✓ | ✓ Via Outlook |
| Multi-role access (Admin/Staff/Instructor/Student) | ✓ 4 roles | ✓ | ✓ |
| Student self-service portal | ✓ | ~ Limited | ✗ |
| BI dashboards / KPI reporting | ✓ Built-in | ~ Basic reports | ~ Via Power BI |
| Deployment model | Cloud (SaaS) | Cloud (SaaS) | Microsoft 365 tenant |
| Data isolation | Database-per-tenant | Shared database | SharePoint site |
| Part 145 / CAMO support | ✗ Part 147 focused | ✓ Multi-Part | ✗ |
| Bulk student import (Excel/CSV) | ✓ | ~ | ✓ |
| ICS calendar export | ✓ | ~ | ✓ Native |
✓ = Built-in, fully supported ~ = Available with limitations or requires additional configuration ✗ = Not available
Note: Features are based on publicly available information as of June 2026. We recommend verifying current capabilities directly with each vendor.
Where Each Platform Excels
AMTOS: Examination and Certification
AMTOS's strongest differentiator is its integrated exam engine and question bank. While competitors either lack built-in examination capabilities or offer them through third-party integrations, AMTOS handles the complete examination lifecycle natively — from question bank management through auto-assembled exams to instant grading and direct recording against the student's training record. The one-click CoR generation with automatic prerequisite validation is another standout feature that no competitor matches in depth.
Aviatize: Regulatory Breadth
Aviatize's strength lies in its coverage of multiple EASA Parts. If your organisation holds both Part 147 and Part 145 approvals, Aviatize offers a single platform that covers both regulatory domains. For organisations that need training management and maintenance tracking in one system, this breadth is a genuine advantage.
TrainingManager365: Microsoft Integration
If your organisation is deeply embedded in the Microsoft ecosystem — with existing SharePoint sites, Power Automate workflows, and Microsoft 365 licences — TrainingManager365 avoids adding another platform to your stack. The Microsoft integration means SSO, familiar UI patterns, and no additional infrastructure costs beyond your existing M365 subscription.
Where Each Platform Falls Short
AMTOS: No Part 145 Support
AMTOS is laser-focused on Part 147 training management. If your organisation also needs Part 145 maintenance management or CAMO functionality, you'll need a separate system for those domains. This is a deliberate design choice — by focusing exclusively on Part 147, AMTOS goes deeper into training-specific functionality than broader platforms.
Aviatize: Exam Engine Limitations
While Aviatize covers many Part 147 functions, its examination capabilities are not as deeply integrated as AMTOS's. Depending on your needs, you may need to complement Aviatize with a separate exam management tool — which reintroduces the data fragmentation problem that MTO software is supposed to solve.
TrainingManager365: Platform Dependencies
Building on Microsoft 365 means inheriting its limitations. The platform lacks a native exam engine entirely, CoR generation requires manual template management, and complex training-specific workflows must be built using Power Automate — which requires technical expertise to configure and maintain. If your organisation doesn't already have strong Microsoft 365 administration capabilities, the setup and maintenance burden can be significant.
Decision Framework — How to Choose
Rather than declaring a "winner," here's a framework for matching the right platform to your organisation's specific situation:
- Choose AMTOS if: Your primary need is a complete Part 147 training lifecycle system with strong exam management, question banking, and automated CoR generation. You want a purpose-built platform that goes deep on Part 147 rather than wide across multiple EASA Parts.
- Choose Aviatize if: You hold multiple EASA approvals (Part 147 + Part 145) and want a single platform covering both. You're willing to accept lighter exam functionality in exchange for regulatory breadth.
- Choose TrainingManager365 if: Your organisation is heavily invested in Microsoft 365 and you want to minimise the number of external platforms. You have internal Power Platform expertise to build and maintain training-specific workflows.
What to Ask During Vendor Demos
Regardless of which platform you're evaluating, ask these questions during your demo:
- Show me the complete exam lifecycle — from question creation to exam assembly to grading to result recording. How many manual steps are involved?
- Show me CoR generation — what happens when I click "generate"? Does the system validate prerequisites automatically? What if a prerequisite is missing?
- Show me the audit trail — for a specific student, can I see every change, every exam result, every attendance record, and who modified what?
- What does data migration look like? — how do I import my existing student records and question bank?
- What does the student see? — is there a student-facing portal? What can they access?
- How is data isolated? — is my data in a shared database or a dedicated instance?
The vendor that can demonstrate the most complete, least manual workflow for these core processes is the right choice for your MTO.