Cost / License
- Free
- Open Source
Platforms
- Mac
- Windows
- Linux
IBM DOORS Next is described as 'Manage requirements efficiently to reduce your development costs and speed time to market' and is an app. There are more than 10 alternatives to IBM DOORS Next for a variety of platforms, including Windows, Linux, Web-based, Mac and SaaS apps. The best IBM DOORS Next alternative is Doorstop, which is both free and Open Source. Other great apps like IBM DOORS Next are ReqView, Reqflow, Traceable Requirement Management and Innoslate.
ReqView is a simple yet powerful requirements management tool in which you can easily capture structured requirements for a software or system product and track traceability to design, tests and risks of the developed product.




The function is very similar.


Almost everyone thinks ReqView is a great IBM DOORS Next alternative.
Reqflow is a free and open-source tool for traceability of requirements across documents, designed to analyse documents with speed and efficiency.
enables organizations to improve their overall global requirement management process by capturing, delegating, tracking, and verifying requirements so the final design reflects the voice of the customer.
Innoslate is an integrated systems engineering lifeycle solution with straightforward and convenient requirements management tools. Now you can have end-to-end traceability, baseline and version control, quality analysis, and more in one solution.
Innsolate has a limited ability to represent objects and attributes, has limited traceability features and no built-in CM


Valispace is a co-engineering platform that allows companies that develop complex products to bring them to market faster, helping engineers escape from document hell. It brings all loose engineering data into one central place and helps streamline engineers’ efforts from...
RQS consists of three tools that are plugins of other RM tools, to manage, analyze and improve the quality of the requirements documents/specifications managed by them.
Apply a practical, low-cost/low-risk solution to effectively develop and manage requirements. Describe software, computer screens, interfaces, system components, processes, dashboards, information sources, etc. using an efficient visual approach.




Cradle by 3SL is a requirements management and software / systems engineering tool for agile and phase-based projects including MBSE, agile development, document & project management. Cradle supports small or large teams, either co-located or distributed.




Enables users to create and manage data across the whole sdlc. Acts as a central repository for the software itself, and the requirements / tests and traces. Provides authoring and tracing environment for requirements and all downstream artifacts.

Userdoc allows businesses to leverage AI to help create detailed software requirements that understand their business in depth. It uses industry-standard concepts such as User stories, acceptance criteria, user personas and user journeys.




Functionality-wise it is very similar, with git back end it allows multiple people to edit different documents in the same project (only exclusive edit). User interface is really snappy and modern, desktop client is multi platform.