Altium Requirements Portal Alternative: Tandem vs Valispace

Teams evaluating an Altium Requirements Portal alternative are not choosing between a mechanical tool and an electrical tool. They are choosing how system requirements should stay connected to the engineering work that satisfies them.

Altium Requirements Portal, the current Altium 365 product descended from Valispace, is a capable requirements, systems, traceability, and verification platform. It can manage system, hardware, software, and mechanical requirements. Its strongest native design context is electronics, where requirements can connect directly to Altium schematics, PCB layouts, BOM items, components, and tasks.

Tandem is not a mechanical-only requirements tool. It is an AI-native engineering system for multidisciplinary hardware programs. Tandem keeps system requirements connected to the relevant work across mechanical CAD, drawings, ECAD and electrical artifacts, software behavior, tests, reviews, decisions, verification evidence, engineering changes, and release documentation. Its deepest publicly documented native integration is currently mechanical CAD, but the system model and requirements workflow span the complete product.

The real comparison is therefore not mechanical versus electrical. Both platforms support systems engineering. The difference is where each platform is strongest and how broadly it connects requirements to daily engineering execution.

What Altium Requirements Portal Does Well

Altium Requirements Portal deserves credit as a serious systems and requirements product. It supports structured specifications, requirement hierarchies, parent-child relationships, change history, review workflows, reusable requirements, traceability, and verification and validation activities.

The Valispace lineage also gives Altium strong data-driven systems engineering capabilities. Teams can model systems and subsystems as blocks, reuse numerical parameters, create engineering calculations, manage technical budgets, and use scripts for analysis. Requirements can be checked continuously against system values and verification rules.

Its clearest design advantage is inside the Altium ecosystem. Requirements can appear alongside Altium Designer and Altium 365 electronics work, connect to schematic or PCB design objects, become tasks, and be marked as verified. For an organization standardized on Altium 365, that native ECAD traceability is valuable.

Altium also has live AI capabilities. Its assistant can help author and improve requirements, find gaps or conflicts, and propose changes for an engineer to review and apply. This is not a comparison between an AI platform and a manual requirements database.

Altium Requirements Portal is broader than PCB requirements alone. Its own documentation describes a multidisciplinary product for system, hardware, software, and mechanical requirements. The fair distinction is that its current first-party artifact integration is deepest in electronics and Altium 365.

Official Altium product information:

https://www.altium.com/capabilities/requirements

https://www.altium.com/documentation/altium-365/requirements-portal

Tandem Is Built for the Complete Multidisciplinary System

A system requirement rarely belongs to one discipline. A thermal limit can affect PCB power, enclosure geometry, cooling hardware, firmware behavior, a test procedure, and the evidence needed for release. A mass requirement can change a mechanical assembly, battery selection, wiring, packaging, and verification work. Treating either the PCB or the CAD model as the whole system misses the interfaces where complex hardware fails.

Tandem follows the requirement wherever it goes. Teams can define system requirements, constraints, ownership, success criteria, and system structure, then connect them to the artifacts and evidence that implement or verify them across mechanical, electrical, software, test, and other engineering domains.

Mechanical CAD is a particularly deep part of Tandem today. Tandem works with SolidWorks, Fusion, Onshape, and NX CAD workflows, observes design activity, tracks model and drawing changes, and preserves the context behind those changes. Browser-based reviews keep comments and decisions attached to geometry, drawings, requirements, and evidence.

That mechanical depth does not make Tandem mechanical-only. The same connected workspace can organize system and subsystem requirements, ECAD and electrical artifacts, software-related requirements and evidence, test plans, validation results, documents, engineering decisions, and release records. Engineering artifacts can be linked through the shared system model, existing tools, and custom integrations without forcing the program into one authoring ecosystem.

Learn more about Tandem:

https://tandem.inc/platform

From Requirements Database to Connected Engineering Thread

Altium Requirements Portal and Tandem both provide structured requirements and traceability. Tandem differentiates by emphasizing the living thread between the requirement and the work engineers perform every day.

When a design changes, the important questions are not limited to which requirement record was edited. Teams need to know which parts, drawings, electronics artifacts, software behavior, tests, reviews, and evidence may be affected. They need the decision history explaining why the prior design existed and the release work required before the change is complete.

Tandem keeps those relationships in one engineering context layer. Requirements can stay connected to system architecture, live CAD activity, review history, decisions, verification plans, validation evidence, affected items, and downstream documentation. When something changes, Tandem helps surface what requirements may be affected, what V&V should be rerun, what needs review, and what evidence must be refreshed.

The result answers more than What is the requirement? It also helps answer What implements it? What changed? Why did it change? Who reviewed it? What proves it passed? What must happen before release?

Altium Requirements Portal vs Tandem: Side by Side

System requirements

Altium Requirements Portal: Supports system, hardware, software, and mechanical requirements with structured specifications and system blocks.

Tandem: Supports system-level requirements, constraints, system structure, ownership, attributes, and success criteria across multidisciplinary hardware programs.

Requirement hierarchy and traceability

Altium Requirements Portal: Strong hierarchy, parent-child links, history, reuse, reviews, approvals, and traceability matrices.

Tandem: Connected requirements with ownership, relationships, approvals, affected artifacts, review history, verification evidence, and design decisions.

System modeling and technical calculations

Altium Requirements Portal: Particularly strong in parameterized system models, reusable engineering values, calculations, budgets, scripting, and continuous verification rules.

Tandem: Visual system, subsystem, and component architecture with custom attributes, technical budgets, requirements, linked design artifacts, and verification results.

ECAD and PCB context

Altium Requirements Portal: Deep native advantage inside Altium Designer and Altium 365, including links to schematics, PCB layouts, components, BOM items, tasks, and verification.

Tandem: Can connect ECAD and electrical artifacts and evidence into the multidisciplinary system record. Tandem does not currently claim the same native Altium Designer integration.

Mechanical CAD and drawing context

Altium Requirements Portal: Mechanical requirements can be managed in the browser, but current documentation does not show an equivalent supported native requirements workflow inside mechanical CAD.

Tandem: Deep native context from SolidWorks, Fusion, Onshape, and NX CAD workflows, including model changes, drawing activity, reviews, and design-session history.

Software and cross-domain artifacts

Altium Requirements Portal: Can manage software requirements as part of the system model.

Tandem: Connects software-related requirements and evidence with mechanical, electrical, test, review, and release context. This is a discipline-neutral traceability model, not a claim of automatic source-code synchronization.

Verification and evidence

Altium Requirements Portal: Dedicated V&V workflows, test cases, continuous rules, evidence, and requirement verification.

Tandem: Verification plans, tests, validation evidence, requirements, assemblies, parts, drawings, and decisions remain connected as the design changes.

Reviews and engineering decisions

Altium Requirements Portal: Supports discussions, reviews, tasks, histories, and approvals around requirements and system data.

Tandem: Adds in-context reviews tied to geometry, drawings, requirements, evidence, design activity, and the engineering rationale behind a change.

Change impact and release

Altium Requirements Portal: Tracks requirement and system-data changes and supports verification status.

Tandem: Connects affected requirements, CAD activity, reviews, decisions, V&V, ECO preparation, impact reports, release records, and follow-up work.

AI assistance

Altium Requirements Portal: AI-assisted requirement authoring, improvement, consistency analysis, and reviewed edits.

Tandem: AI grounded in the broader engineering context to support requirement analysis, review preparation, affected-item identification, ECO context, drawing checks, verification evidence, release records, and follow-up tasks.

Why Cross-Domain Change Impact Matters

Complex hardware fails at interfaces. A revised power requirement can affect a PCB, connector, harness, thermal solution, enclosure, firmware behavior, and system test. A mechanical change can affect antenna performance, sensor placement, cable routing, service procedures, software calibration, and verification evidence.

A requirements system should make those dependencies visible before the program discovers them during integration or validation. That requires more than storing several disciplines in the same database. It requires connecting requirements to the artifacts, reviews, decisions, tests, and evidence that change with them.

This is Tandem's strongest differentiation. Its system model spans the program while its CAD context captures high-value engineering activity as it happens. The broader program can then connect ECAD and electrical work, software evidence, test results, documents, and release work to the same requirement and system structure.

For regulated and high-reliability teams, this also improves the evidence chain. A traceability report is more useful when it preserves the design state, decision history, review, and validation evidence behind the status. Tandem helps make that record a product of engineering work rather than a document rebuilt before every milestone.

AI Across the Engineering Lifecycle

Both products use AI, but their centers of gravity differ.

Altium's assistant operates strongly inside requirements and systems workflows. It can generate and improve requirement language, identify gaps and inconsistencies, answer questions, and propose requirement changes for review.

Tandem's AI works from the relationships among requirements, CAD activity, drawings, reviews, decisions, affected items, tests, evidence, and documentation. That context supports requirement analysis, review preparation, change summaries, impact analysis, verification planning, evidence organization, ECO preparation, and release records.

The important advantage is not an unreviewed autonomous agent. Engineers remain responsible for technical decisions and approvals. The advantage is that Tandem gives AI the multidisciplinary context needed to produce useful engineering work instead of generic text.

Which Platform Should You Choose?

Choose Altium Requirements Portal when your organization is deeply standardized on Altium 365, electronics and PCB traceability are the dominant workflow, and parameterized systems modeling, calculations, requirements, and V&V are the primary needs. Its native connection to Altium electronics design is a real advantage.

Choose Tandem when the product combines mechanical, electrical, software, test, systems, quality, and manufacturing work, and requirements need to remain connected to heterogeneous artifacts and tools. Tandem is especially strong when mechanical CAD is a major source of design truth but the program cannot be reduced to mechanical engineering alone.

For teams building aerospace systems, robotics, medical devices, vehicles, industrial equipment, and other multidisciplinary hardware, Tandem provides the broader engineering thread. It connects requirements to the work, decisions, evidence, and release context needed to move the whole product forward.

Frequently Asked Questions

Is Tandem only for mechanical engineering?

No. Tandem has deep mechanical CAD context, but it is an AI-native systems-engineering and hardware-development platform. It manages system requirements and multidisciplinary engineering evidence across mechanical, electrical, software, test, quality, manufacturing, and other domains.

Can Tandem manage system-level requirements?

Yes. Tandem supports requirements, constraints, system structure, ownership, custom attributes, verification plans, validation evidence, tests, assemblies, parts, drawings, and decisions in one connected workspace.

Can Tandem connect requirements to ECAD, electrical, software, and test artifacts?

Yes. Tandem's discipline-neutral system model can connect requirements to the relevant artifacts and evidence across those domains. Its deepest publicly documented native integration is currently mechanical CAD, so this should not be confused with a claim of automatic native synchronization with every ECAD or software tool.

Is Altium Requirements Portal the same as Valispace?

Altium acquired Valispace in 2024 and migrated the product into Altium 365. Altium Requirements Portal is the current product name, while Valispace and Requirements & Systems Portal remain relevant names for the product lineage and legacy projects.

Which platform is better for multidisciplinary hardware teams?

Altium Requirements Portal is strong for Altium-centered electronics organizations and data-driven systems engineering. Tandem is the stronger fit when requirements must remain connected to the complete multidisciplinary engineering loop, especially live mechanical CAD, design reviews, decisions, verification evidence, changes, and release work.

Conclusion

Altium Requirements Portal is a capable requirements, systems, and verification platform with a particularly strong position inside Altium's electronics ecosystem. It should not be dismissed as PCB-only, and Tandem should not be described as mechanical-only.

Tandem is the stronger Altium Requirements Portal alternative for teams that need requirements to remain connected to the complete multidisciplinary product. It brings system requirements, mechanical CAD, ECAD and electrical artifacts, software-related evidence, tests, reviews, decisions, validation, change impact, and release documentation into one engineering thread.

The choice is not mechanical versus electrical. It is an electronics-centered requirements environment versus an AI-native operating layer for the broader hardware program. For teams that need to design, verify, and release the whole system, Tandem is the more complete long-term platform.