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Cybersecurity · head to head

HashiCorp Boundary vs Silent Eight

HashiCorp Boundary logo

HashiCorp Boundary

Cybersecurity

Identity-aware session broker for infrastructure access without distributing credentials

From
Free
Rated
-
Full reviewWebsite
Silent Eight logo

Silent Eight

Cybersecurity

AI adjudication of sanctions screening and AML alerts

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only HashiCorp Boundary has a free tier, so it costs nothing to try first.
  • Each has a real cost: HashiCorp Boundary hashiCorp was acquired by IBM in February 2025 and Enterprise licensing now runs through IBM Passport Advantage; IBM has already retired HCP Vault Secrets, so Boundary's roadmap depends on IBM portfolio decisions rather than HashiCorp's own product strategy.; Silent Eight automated disposition has to clear model risk governance and a regulator, and the shadow running period before auto-close is permitted can consume most of the first year of the contract.
  • They diverge on capability: HashiCorp Boundary covers Identity-based access, Silent Eight covers Alert adjudication.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which HashiCorp Boundary and Silent Eight actually diverge.

Attributes where HashiCorp Boundary and Silent Eight differ
AttributeHashiCorp BoundarySilent Eight
Starting priceFreeOn request
Pricing modelOpen source, no licence feequote
Free tierYesNo
PlatformsLinux, macOS, Windows, WebWeb, Linux

Identical on both: user rating (Not yet rated), category (Cybersecurity).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in HashiCorp Boundary

  • Identity-based access
  • Just-in-time credentials
  • Dynamic host catalogues
  • Session recording
  • Transparent sessions
  • Multi-hop workers
  • Audit logging
  • Terraform provider

Only in Silent Eight

  • Alert adjudication
  • Narrative generation
  • Name screening automation
  • Quality assurance
  • Shadow mode
  • Model transparency reporting

What people use each for

The jobs each tool is most often brought in to do.

HashiCorp Boundary

  • A platform team replacing shared SSH keys and a bastion host so that leavers lose access the moment they are removed from the identity providernot Silent Eight
  • Granting contractors time-boxed database access without ever issuing them a credential they could keepnot Silent Eight
  • An estate where autoscaling replaces hosts continuously and a static access list is always out of datenot Silent Eight
  • Producing session recordings as evidence for an audit that requires proof of who touched production and what they rannot Silent Eight

Silent Eight

  • A bank whose level one screening team spends most of its time closing obvious false name matchesnot HashiCorp Boundary
  • A payments institution with alert volumes growing faster than it can recruit and train analystsnot HashiCorp Boundary
  • A compliance function asked by a regulator to demonstrate consistency of alert decisions across offshore teamsnot HashiCorp Boundary
  • An institution that has just tightened screening thresholds after an enforcement action and cannot staff the resulting alert increasenot HashiCorp Boundary

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

HashiCorp Boundary

  • HashiCorp was acquired by IBM in February 2025 and Enterprise licensing now runs through IBM Passport Advantage; IBM has already retired HCP Vault Secrets, so Boundary's roadmap depends on IBM portfolio decisions rather than HashiCorp's own product strategy.
  • Enterprise pricing is not published anywhere, and the features most organisations actually need for compliance, notably session recording, are Enterprise only, so the free community edition is rarely the version you end up buying.
  • It solves access to infrastructure, not to applications; browser-based internal tools, SaaS admin consoles and APIs need a separate control, so Boundary is one component of a zero-trust programme rather than the whole thing.
  • Running it yourself means operating controllers, worker nodes and a Postgres database in a highly available configuration, and if that control plane is down nobody can reach production, which makes it a new critical dependency.
  • It is materially easier to adopt if you already run Vault and Terraform; teams without that ecosystem face a steeper learning curve than a device-based mesh product like Tailscale, for a similar access outcome.

Silent Eight

  • Automated disposition has to clear model risk governance and a regulator, and the shadow running period before auto-close is permitted can consume most of the first year of the contract.
  • It does not improve detection, so an institution with a poorly tuned monitoring system automates the handling of bad alerts rather than fixing why they exist.
  • Pricing is tied to alert volume, which means efficiency gains elsewhere that reduce alerts also reduce the vendor bill in a way sales teams structure minimums against.
  • The headcount saving is only realised if the institution actually reduces the analyst pool, and many banks redeploy rather than cut, leaving the business case unrealised on paper.
  • As a mid-sized private vendor serving tier one banks, concentration risk cuts both ways; the loss of one large client materially affects the company, and buyers should ask about financial stability during diligence.

Pricing, plan by plan

HashiCorp Boundary

Free
  • Boundary Community EditionFree
    • MPL 2.0 open source
    • Self-hosted controllers and workers
    • Identity-based target access
  • Boundary Enterprise$undefined/year
    • Session recording and playback
    • Multi-hop and transparent sessions
    • Multi-tenancy via scopes

Silent Eight

On request
  • Iris$undefined/year
    • Priced by alert volume adjudicated
    • Deploys against existing screening and monitoring systems
    • Shadow mode evaluation period

Which should you pick?

Choose HashiCorp Boundary if

  • You need identity-based access.
  • You want to start without paying.
  • You work on Linux, macOS, Windows, Web.
  • You also want just-in-time credentials.
HashiCorp Boundary review

Choose Silent Eight if

  • You need alert adjudication.
  • You work on Web, Linux.
  • You also want narrative generation.
Silent Eight review

Questions people ask

Is HashiCorp Boundary or Silent Eight better?
Neither clearly leads. HashiCorp Boundary starts at Free and Silent Eight at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, HashiCorp Boundary or Silent Eight?
HashiCorp Boundary has a free tier; the other does not. Paid plans start at Free for HashiCorp Boundary and On request for Silent Eight.
Does HashiCorp Boundary or Silent Eight run on more platforms?
HashiCorp Boundary runs on Linux, macOS, Windows, Web. Silent Eight runs on Web, Linux.
Can I use HashiCorp Boundary for free?
Yes. HashiCorp Boundary has a free tier, so you can try it without paying. Silent Eight starts at On request.
What is HashiCorp Boundary best used for?
HashiCorp Boundary is most often used for a platform team replacing shared ssh keys and a bastion host so that leavers lose access the moment they are removed from the identity provider, granting contractors time-boxed database access without ever issuing them a credential they could keep, an estate where autoscaling replaces hosts continuously and a static access list is always out of date, producing session recordings as evidence for an audit that requires proof of who touched production and what they ran. Of those, a platform team replacing shared ssh keys and a bastion host so that leavers lose access the moment they are removed from the identity provider and granting contractors time-boxed database access without ever issuing them a credential they could keep are not what Silent Eight is typically brought in for.
What can HashiCorp Boundary do that Silent Eight cannot?
HashiCorp Boundary covers Identity-based access, Just-in-time credentials, Dynamic host catalogues, Session recording. Silent Eight covers Alert adjudication, Narrative generation, Name screening automation, Quality assurance.

Answered from the vendors’ own pages

HashiCorp Boundary: Is Boundary open source?

The community edition is, under MPL 2.0. Boundary Enterprise is commercial and is now sold through IBM Passport Advantage.

Silent Eight: Does Silent Eight replace our screening system?

No. It consumes alerts from your existing screening and monitoring systems and decides them. The detection layer stays where it is.

HashiCorp Boundary: Does it replace a VPN?

For infrastructure access, largely yes. It grants a session to a specific target rather than putting the user on a network, but it does not cover browser-based internal applications.

Silent Eight: Will a regulator accept AI closing alerts?

It depends on your jurisdiction and your model governance evidence. Banks typically run extended shadow mode first and phase auto-closure by alert type.

HashiCorp Boundary: What does Boundary Enterprise cost?

HashiCorp does not publish Boundary pricing. It is quoted, and since the IBM acquisition it is transacted on IBM licensing paper.

Silent Eight: Where is the company based?

Singapore, with offices in New York, London and Warsaw.

HashiCorp Boundary: Do I need Vault to use it?

No, but the just-in-time credential brokering that makes Boundary worthwhile depends on Vault or an equivalent secrets store.

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