AuditBoard vs Diligent HighBond: an audit-first platform against board reporting

Both products changed shape recently and both changes matter to a buyer. AuditBoard is now branded Optro: auditboard.com redirects to optro.ai, and auditboard.com/pricing redirects to optro.ai/pricing. On the Diligent side the issue is naming rather than ownership: HighBond, Diligent One and Internal Audit are overlapping product names, which Diligent's own material concedes makes it hard to tell what a package includes.

Underneath, the scope difference is about audience. Optro is audit-first, with controls reused across programmes and AI agents for control testing. HighBond adds ACL Analytics for testing full data sets and AI agents that roll forward audits and draft evidence requests with human sign-off, and Diligent Boards can be bundled. If your audit output ends up in a board pack, that bundling is the argument.

AuditBoard is audit and GRC software: internal audit, SOX, enterprise risk, compliance, infosec, third-party risk and AI governance on one data model, with AI agents for control testing. Diligent HighBond is audit and GRC software: internal audit, risk and compliance on the Diligent One Platform, with ACL Analytics for testing full data sets and AI agents that roll forward audits and draft evidence requests with human sign-off. That overlap is real, which is why the two end up on the same shortlist, but the design assumptions underneath differ.

Keep AuditBoard on the list if this is you: audit and SOX teams that want room to add risk and compliance later. Drop it if this is closer: a team that wants board reporting from the same vendor. The limitation worth naming up front is that board portal software is not among its listed products, and the AuditBoard name still appears in older integration documents and peer references.

Keep Diligent HighBond on the list if this is you: audit teams that report to the audit committee and want board software from the same vendor. Drop it if this is closer: a team that only needs audit and SOX execution. Its own limitation is that the overlapping package names make it hard to tell what a quote includes, and the GRC scope can exceed what a team buying audit management alone needs.

There is a licensing detail on the Optro side that changes the economics for a large control population: its pricing page lists unlimited stakeholder licenses at no extra fee, so control owners respond in the tool rather than by email. For an organisation with hundreds of control owners, that is a material difference from per-seat GRC licensing.

The table below carries the facts you can check without a sales call: pricing model, deployment, platform support and trial access. Read it before the demos, then use the sections underneath for the parts that depend on your own environment.

Neither vendor publishes a price and neither lists a trial, so the specification table cannot separate them on either count. Scope and audience are the differentiators, and they do not fit in a matrix row.

Neither vendor publishes a price, so the only honest comparison is of what drives each quote. There are no dollar figures to put side by side below, and that is the finding rather than a gap in the research: both vendors' own pages were read on 25 September 2026 and neither carries a price.

AuditBoard, now branded Optro, publishes no prices; auditboard.com/pricing redirects to optro.ai/pricing, which offers a quote form and says additional stakeholder licenses are free. Trial: No free trial is listed on the pricing page.

Diligent publishes no HighBond prices; its pricing page is a quote request form that says packages are tailored to your organization's size and stage of growth. Trial: No free trial is listed.

Optro sells custom plans that can be upgraded module by module, so each added area beyond audit and SOX, including risk, compliance and third-party risk, adds to the quote. Diligent sells tailored packages scoped by GRC specialists and says they are sized to your organization's size and stage of growth.

The single most useful commercial request here is a module list with the quote, and Diligent's own material effectively invites it: ask what each named product in the package includes, because HighBond, Diligent One and Internal Audit overlap. On the Optro side, ask which modules you would license in year one and what each additional area costs in year two.

What moves the AuditBoard number: each added area beyond audit and SOX, including risk, compliance and third-party risk, adds to the quote, though the pricing page lists unlimited stakeholder licenses at no extra fee. For Diligent HighBond: HighBond, Diligent One and Internal Audit are overlapping product names, so ask for a module list with the quote. Ask both vendors to put the first-year total in writing, license plus services plus any module you would need in year two, and model it yourself with the accounting software ROI calculator before the renewal conversation rather than after it.

Rollout on AuditBoard: custom plans that can be upgraded module by module. On Diligent HighBond: tailored packages scoped by Diligent's GRC specialists. That is the difference that shows up in the project plan rather than in the demo.

Both have AI with a human in the loop and both should be pinned down in writing. Optro lists AI agents for control testing. HighBond lists AI agents that roll forward audits and draft evidence requests with human sign-off. Ask each vendor what the AI is allowed to do without an approval step, because an automated audit conclusion is a different thing from an automated draft.

Analytics is the capability to probe on the Diligent side. ACL Analytics tests full data sets rather than samples, which changes what an audit can assert. If full-population testing is already part of your methodology, ask Optro directly how it supports it rather than assuming parity. If a controller rather than internal audit owns SOX, the BlackLine and FloQast comparison covers tools that put SOX next to the close instead.

Plan the first close or first cycle after go-live before you sign. Write down who owns configuration changes, who answers an auditor's question about the records, and what happens to your data if you leave. Starting from a risk and control matrix template makes those answers concrete instead of aspirational.