Does Struct support enterprise SSO and MFA?

Yes. Organizations can configure OpenID Connect SSO with PKCE, verified email, domain allowlists, and just-in-time provisioning. Password accounts can enable TOTP MFA with one-time recovery codes.

Different disciplines.Shared interfaces.One decision.

Struct connects engineering work across independently owned spaces and projects, with scoped access, linked evidence, reviews, and decisions built into the workflow.

Try Struct Book Demo

Controller interface review

● Organization synced

2 scoped projects

▱EnclosureMechanical context

◇Harness J4Rev B · 6-position2

⌾Controller J4Rev C · 8-position

⬡Control serviceSoftware owner1

▥Decision packageUpdate harness

mounts6-pinrequires 8

Interface mismatchHarness Rev B · Controller ICD Rev C

Linked review evidenceSource revisions attached

Project-aware agentDraft · link · report

1authoritative decision record

1,200+editable engineering symbols

34verified connector presets

8discipline-focused libraries

Scoped engineering collaboration

Each discipline keeps its context. The system gets one review.

Start with user or organization projects. Use spaces for team, program, client, or confidentiality boundaries. Link the authorized work a review needs.

Separate the work

Keep each discipline’s work in focused projects with the tools and context it requires.

Connect the handoff

Link authorized items across projects and keep the source context visible.

Record the decision

Anchor review threads to the work and preserve accepted states in saved versions.

Book Demo Explore team workflows

PROGRAMAURELIA R1 integration3 reviewers

ProjectsPeopleSecurityAudit

SCOPED REVIEWController interface 2 projects linked

MECHANICALEnclosure

ELECTRICAL · REV BHarness J46 pins

EMBEDDED · REV CController J4

SOFTWAREControl service

EVIDENCEICD Rev C

DECISIONUpdate harness

Alex

Morgan

Mismatch linkedHarness Rev B · ICD Rev C

v18

Decision savedHarness updated to 8-pin

One focused review

Review the handoff without rebuilding the context.

Start with the relevant system view, open its supporting evidence, run selected checks, and preserve the decision with the work.

⌁

Map the interface

Draw or import the relevant system view and connect the items under review.

! 1 mismatch found

Link the evidence

Reference a diagram, node, connector, requirement, or decision. Struct creates the backlink.

▷

Capture the decision

Share a review link, keep comments anchored to the work, and preserve the accepted state in a version.

Linked specifications

Keep the evidence with the interface.

Link the requirement, source revision, comment, and accepted decision to the exact connector under review.

01
Reference preciselyLink only what the decision affects.
02
Navigate both waysOpen the canvas from a specification or the specification from its backlink.
03
Export the recordShare Markdown, HTML, Word, or the editable project.

Controller interface decision Saved locally

AR1-ICD-004 · REV CCross-project review · linked

AURELIA-R1 controller interface

Controller J4 requires an 8-position connector. The review links @{Harness and cable topology} and Harness Rev B.

ϟDIAGRAM PREVIEWHarness and cable topologyOpen ↗

Decision: update the harness connector before the next build and preserve both source revisions with the review.

⌁

INTERFACE REFERENCEJ4 · harness to controller

Focus →

What ships with the workspace

Keep the tools.
Connect the decisions. Check the handoff.

Struct agent

Ask the agent to prepare the review.

It can compare linked project evidence, report selected conditions, and prepare a draft for an engineer to approve.

Struct agentWorking in controller interface review

Project context

Compare Harness Rev B with Controller ICD Rev C and report any interface mismatch.

Interface mismatch found

Harness J4 uses a 6-position plug. Controller ICD Rev C requires an 8-position socket. I linked both sources and prepared a review draft. No design changes were applied.

1 mismatch found2 sources linkedHuman approval required

Review draftAwaiting approval

Canvas: 2 interface items referenced
Specification: Harness Rev B · ICD Rev C
Decision: Update harness connector

Work within the current project context.
Link diagrams, specifications, and review threads.
Prepare drafts and selected checks. Human approval is required.

Try the agent →External agent kit

⌂

Private by design

Start privately. Share deliberately.

Keep browser-local work private or share selected project evidence through an organization. Export browser-local backups regularly.

Embedded systems + PCB CAD

Design embedded hardware and multilayer PCBs.

Build microcontroller systems from exact parts and firmware interfaces. Then place footprints, cross-probe, route copper, run DRC, and inspect the board in 3D.

Three-dimensional Struct PCB view of an ESP32 controller board with routed copper and fitted components

⇄

Open interchange

Bring the design with you.

Import Mermaid, PlantUML, images, supported KiCad libraries, or Struct projects. Export diagrams, documents, editable project data, and generated PCB review packages.

✓

Checks that match the work

Run selected checks before handoff.

Report architecture conditions, schematic ERC, PCB DRC, sourcing signals, and harness release checks from the project.

Each discipline keeps its language

Use the notation the review requires.

Bring software, cloud, electrical, mechanical, and other engineering evidence into the same review without flattening the source work.

Shape library1,200+ editable symbols · 34 specification-backed connector presets

⌕

Electrical circuits, controls, and harnesses97 symbols · 12 IEC/IPC presets

ResistorDiodeCapacitorGroundRelayMotor

IEC conductorHarness wireOff-page net

Tools by engineering discipline

Use the working set for the job at hand.

Choose a discipline to narrow the library, starters, metadata, and checks without leaving the project.

{ }56 semantic shapes

Software architecture & UML

Model system context, services, data stores, APIs, classes, sequences, states, ER models, and trust boundaries with editable semantic shapes.

System, layered, service, flow, state, and data starters
UML relationships, cardinalities, metadata, and diagnostics

Software engineering solution →

☁338 provider symbols

AWS & Kubernetes architecture

Use recognizable provider artwork for deployed technology while keeping every cloud service and Kubernetes resource movable, connectable, and exportable.

307 AWS Architecture Icons and 31 Kubernetes symbols
Terraform and Kubernetes YAML import with icon mapping

Cloud infrastructure solution →

✦AI, data & ML

Data, AI & machine learning

Explain RAG, agents, model serving, data pipelines, experiments, evaluation, governance, drift, and human review without flattening them into vague boxes.

Six editable agentic patterns and specialized AI nodes
18 ML engineering symbols and 7 relationship presets

Data and AI solution →

⌁18 symbols · 4 verified presets

Network topology & security

Document devices, subnets, trust boundaries, secure access, traffic management, wireless links, failover paths, and packet observability.

IEEE Ethernet, IPsec, BGP, and VRRP relationships
Clear topology, addressing, and security-zone storytelling

Network and security solution →

↻18 symbols · 2 verified presets

DevOps & software delivery

Map source, CI, quality gates, artifacts, environments, deployment governance, operations, incidents, recovery, and rollback.

SLSA build provenance and OCI artifact pushes
Delivery ownership, environments, gates, and operational context

DevOps and platform solution →

⌁97 symbols · 12 verified presets

Electrical schematics, controls & harnesses

Document power, analog, digital, control, protection, and wiring systems with terminal-aware conductors and engineering metadata.

ERC, reference designators, buses, nets, junctions, and off-page connections
Exact parts, connector cavities, conductors, bundles, formboards, BOMs, and cut lists

Electrical engineering solution →

Wire harness design software →

Online PCB design software →

⌾196 symbols · 13 verified presets

Mechanical engineering drawings

Build ISO-oriented technical drawings and system schematics with proportioned features, dimensions, datums, GD&T, surface finish, piping, and motion.

ISO liquid flow, visible, hidden, extension, dimension, and leader lines
Use dedicated center-mark geometry for axes and circular features

Mechanical engineering solution →

Hydraulic schematic software →

◎24 symbols · 3 verified presets

Robotics architecture, wiring & harnesses

Keep the functional stack, embedded control, safety system, wiring, and production harness in the same project.

CAN FD, EtherCAT, ROS 2, power, perception, motion, and safety relationships
Connector cavities, conductors, bundles, formboards, BOMs, cut lists, and release checks

Robotics engineering solution →

Production wire harness workflow →

Visual and versionable

Keep the review editable.

Draw the interface, import the source, or edit its supported text representation. The review stays connected to the evidence.

01
Edit on the canvasMove, route, group, resize, style, and annotate.
02
Use text when it helpsImport and export supported Mermaid diagrams.
03
Keep the explanation attachedLinks point to the exact item they describe.

CanvasMermaid

Synced

Controller interface3 records · 1 mismatch

▣ELECTRICAL · REV BHarness J4

6-pin plug

◇EMBEDDED · REV CController J4

requires 8

⬡DECISIONUpdate harness

interface-review.mmdReview draft

1flowchart TD
2harness["Harness J4 · Rev B"]
3
4controller["Controller J4 · Rev C"]
5
6decision["Update harness"]
7
8harness -- "6-pin" --> controller
9controller -- "requires 8" --> decision

Struct · Private session Local only

Live collaboration2 peers · end-to-end encrypted

SKHOSTYou

AMREVIEWERAlex

↗✓

◇

Review state updatedController interface

Evidence linkedHarness Rev B · ICD Rev C

✓

Peer fingerprint comparedSecurity model under validation

⌁LAN◉HotspotᛒBLE

Private local collaboration preview

Review together on the network you control.

The planned desktop workflow sends project updates directly between verified peers on the same network, without a cloud relay.

↔
Move the whole projectCanvas, connectors, metadata, specifications, and presentation order stay together.
⌁
Use the network you haveThe desktop preview is designed for local Wi-Fi and offline hotspot review.
◇
Keep a recoverable copyExport browser-local projects regularly because browser storage can be cleared.

Planned LANPlanned hotspotBrowser backup

Desktop distribution is paused. Use Struct in your browser and export browser-local backups regularly.

Simple pricing

Start private.
Pay when the work becomes shared.

Solo is a complete professional workspace, not a limited demo. Add seats when the diagram becomes a living team record, then add governance when the organization requires it.

Compare every feature →

For one engineer

Solo

$0forever

All eight disciplines, linked specifications, discipline-specific tools, private offline projects, imports, and exports.

Try Struct →

Best for teamsFor shared engineering

Team

$12/ seat / month
billed annually

Live diagrams and specs, roles, restricted projects, versions, review links, and 50 daily agent prompts.

Explore Team →

For governed organizations

Business

$29/ seat / month
billed annually

OpenID Connect SSO, verified domains, retention, audit history, and priority rollout support.

Explore Business →

Team and Business require two seats. Monthly billing is available. See pricing details and Enterprise options.

Questions, answered

The practical details.

Start in private offline mode or create an organization when the work becomes shared.

Can I use Struct for free?+

Yes. Create a hobby organization for synchronized projects or choose private offline mode without an account.

Where are my diagrams stored?+

Signed-in projects sync to the selected organization. Private offline projects stay in the current browser profile. Export browser-local backups regularly because browser storage can be cleared.

How does team collaboration work?+

Organizations manage seats, roles, project access, versions, review links, retention, and audit history. Changes sync live and conflicting writes are rejected for retry.

Does Struct support SSO and MFA?+

Yes. Business and Enterprise can require OpenID Connect SSO. Password accounts use deployment-configured second-factor protection: Google Identity Platform supports trusted-phone verification, while the built-in provider supports authenticator codes and one-time recovery codes.

Which Mermaid diagrams can I import?+

Struct supports Mermaid flowcharts, class diagrams, sequence diagrams, state diagrams, and entity-relationship diagrams, with export back to Mermaid where the format can preserve the model.

Can I design embedded systems and PCBs in Struct?+

Yes. Keep embedded-system architecture, firmware interfaces, editable schematics, PCB layout, 3D board review, manufacturing setup, and files in one project. The CAD editor includes schematic-to-PCB sync, cross-probing, ERC, DRC, routing, exact-part evidence, and supplier search.

What can the Struct agent do?+

It can edit the current project, update linked specifications, prepare deliverables, and run selected project checks. Agent output is a draft and requires human approval. Paid beta access uses fair-use limits while usage is evaluated.

Can I work without the internet?+

After the first load, browser-local projects can open offline. Export backups regularly because browser storage can be cleared. Desktop peer collaboration is a preview and is not currently distributed.

Pre-build system review