Comparison
Constellation vs Diligent
Diligent is the market leader in board management software — board portals, meeting management, voting, document distribution, and director collaboration. It’s trusted by thousands of boards worldwide. Constellation does something different: it takes what boards decide and makes those decisions enforceable at the moment of institutional action. Diligent is the boardroom. Constellation is the operating system that runs between board meetings.
What Diligent does well
Diligent has built the definitive platform for board operations. It:
- •Manages board meeting agendas, materials, and minutes
- •Provides secure document sharing for directors and committees
- •Facilitates board voting and resolution tracking
- •Manages director onboarding, evaluations, and D&O questionnaires
- •Supports entity management and subsidiary governance
- •Offers ESG reporting and compliance workflows
It’s where governance conversations happen — the table around which decisions are made. And it does that exceptionally well.
The structural difference
Diligent
“The board discussed and voted on this resolution.”
Board management platform
Constellation
“This action is consistent with what the board decided and within delegated authority.”
Institutional operating system
Diligent captures decisions. Constellation enforces them. One is the record. The other is the runtime.
Layer comparison
| Diligent | Constellation | |
|---|---|---|
| Governs | Board process & documents | Institutional action |
| When | Board meetings & review cycles | Moment of action |
| Scope | Board & committee level | Entire institution, all actors |
| Enforcement | Minutes & resolution records | Real-time check / escalate / trace |
| AI governance | Board-level AI oversight policy | Agent interception at moment of action |
| Contestation | Not applicable | Formal challenge & appeals process |
| Memory | Meeting archives | Precedent, institutional learning |
Beyond the boardroom
Diligent’s world ends where the boardroom ends. A board votes to cap marketing spend at $500K per quarter, approves a new partnership framework, or sets an AI usage policy. Diligent records that beautifully.
But what happens on Wednesday morning when a marketing director approves a $200K campaign that pushes the quarter past $500K? What happens when an AI agent acts on an unsigned partnership agreement? Diligent has no way to know. It’s not designed to.
Constellation exists in that gap. It takes board decisions — spending thresholds, authority boundaries, policy constraints — and makes them live constraints that are checked every time someone (or something) acts on behalf of the institution.
What board software cannot do
Board management platforms manage the process of governance at the director level. They cannot:
- •Enforce board resolutions in real-time across the organization
- •Intercept AI agent actions that exceed delegated authority
- •Check whether operational decisions conflict with prior board commitments
- •Allow staff or stakeholders to formally contest institutional constraints
- •Create immutable traces of every action taken under institutional authority
- •Build governance precedent that informs future decisions
These aren’t failures of Diligent. Board software is designed to serve the boardroom — not to govern everything that happens after the meeting ends.
Where they sit in the stack
// Governance architecture
Board Governance (Diligent)
↓ decisions, resolutions, policies
Institutional Governance (Constellation)
↓ constraints, thresholds, authority
Application Logic
↓ actions by humans and AI agents
Compliance Reporting (Drata, Vanta)
↓ evidence, audit trails
Enterprise Risk (ServiceNow GRC)
Diligent is upstream — where governance decisions originate. Constellation is downstream — where those decisions become operational constraints. The strongest architecture connects them: board resolutions in Diligent become enforceable commitments in Constellation.
Bottom line
Commercial competitor?
No
Strategic risk?
Low — different buyer, different use case
Integration opportunity?
High — resolutions become live constraints
Constellation is not board management software. It’s the layer that makes board decisions operational — enforcing authority, recording traces, and ensuring institutional legitimacy between meetings, not just during them.