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features
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support

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Description

Astah SysML helps systems engineers capture requirements, structure, and behavior in SysML v1 without the weight of a large enterprise suite. Block definition and internal block diagrams, requirement diagrams and tables, parametric diagrams, and use case, state machine, activity, and sequence diagrams are all included, along with mind maps for early concept work. Each diagram is a view of one shared model, so updating a requirement or block keeps every related diagram in step. Assist functions such as double-click creation, creating multiple elements from text, and alignment guides reduce drawing time. Models can be exchanged through XMI and with Cameo Systems Modeler, and profiles let teams extend the language. For AI-assisted work, AI Chat Copilot connects to OpenAI, Azure OpenAI, Claude, Gemini, or any OpenAI-compatible endpoint through your own API key, and a local MCP server lets external AI agents read and work with your models. Astah SysML runs locally on Windows and macOS. It does not include simulation. Developer: Change Vision, Inc. Current version: 11.0 (March 2026).

Description

Requirements Portal by Altium is a requirements management and verification tool integrated directly into Altium’s solutions, including Altium Develop, Altium Agile Teams and Altium Agile Enterprise. It enables engineering teams developing hardware products and embedded systems to create, store, and manage formalized requirements and link them to designs and verification data. Each requirement is traceable and connected to upstream system definitions and downstream design and verification artifacts, such as schematics, PCB layouts, BOMs, and test cases, providing visibility from system design through implementation, verification, handoff, and certification. This helps teams reduce rework, avoid misalignment across disciplines, and simplify compliance activities. — Why choose Requirements Portal? Unlike traditional requirements management systems that are rigid, expensive and maintained by dedicated admins, Requirements Portal offers an easy-to-use and easy-to-learn alternative that delivers a fast return on investment for engineering teams. Compared to document-based approaches that are near-impossible to scale beyond a few hundred requirements, Requirements Portal helps you scale across complex products and multiple projects with thousands of requirements. — Requirements Portal is the successor to Valispace, created after Altium acquired the company and integrated its technology into the Altium ecosystem. Requirements Portal is included in Altium Develop, and the starting price includes unlimited collaborators.

API Access

Has API Yes 

API Access

Has API No 

Screenshots View All

Screenshots View All

Integrations

Altium Develop No 
Azure OpenAI Service Yes 
Cameo Systems Modeler Yes 
Claude Yes 
Gemini Yes 
OpenAI Yes 

Integrations

Altium Develop Yes 
Azure OpenAI Service No 
Cameo Systems Modeler No 
Claude No 
Gemini No 
OpenAI No 

Pricing Details

$140/year
1-year license: $140. 1-year floating license: $270. 20-day free trial.
Free Trial Yes 
Free Version No 

Pricing Details

Requirements Portal is included in Altium Develop with unlimited collaborators. Create an Altium Develop workspace for $995/year. Invite unlimited collaborators for free.
Free Trial Yes 
Free Version No 

Deployment

Web-Based No 
On-Premises Yes 
iPhone App No 
iPad App No 
Android App No 
Windows Yes 
Mac Yes 
Linux No 
Chromebook No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Customer Support

Business Hours Yes 
Live Rep (24/7) No 
Online Support Yes 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Types of Training

Training Docs Yes 
Webinars Yes 
Live Training (Online) Yes 
In Person Yes 

Vendor Details

Company Name

Change Vision, Inc.

Founded

2006

Country

Tokyo, Japan

Website

astah.net/products/astah-sysml/

Vendor Details

Company Name

Altium

Founded

1985

Country

United States

Website

www.altium.com/capabilities/requirements/requirements-management

Product Features

Product Features

Product Data Management

Bill of Material Management No 
Document Management Yes 
Formula Management No 
Product Analytics No 
Product Lifecycle Management No 
Testing Management Yes 
Version Control Yes 

Product Lifecycle Management

Change Management Yes 
Compliance Management Yes 
Cost Tracking No 
Design Management No 
Document Management Yes 
Product Data Management No 
Project Management No 
Requirements Management Yes 
Supplier Management No 

Requirements Management

Automated Functional Sizing Yes 
Automated Requirements QA Yes 
Automated Test Generation No 
Automated Use Case Modeling No 
Change Management Yes 
Collaboration Yes 
History Tracking Yes 
Prioritization Yes 
Reporting Yes 
Status Reporting Yes 
Status Tracking Yes 
Summary Reports Yes 
Task Management No 
To-Do List No 
Traceability Yes 
User Defined Attributes Yes 

Test Management

Automation Integration No 
Collaboration Tools No 
Pass/Fail Results Tabulation Yes 
Reporting / Analytics Yes 
Requirements Management Yes 
Test Scheduling Yes 
Test Tracking Yes 
Time/Budget Tracking Yes 

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