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Developer Tools · head to head

Hookdeck vs Silent Eight

Hookdeck logo

Hookdeck

Developer Tools

Event gateway that receives, queues, retries and replays inbound webhooks

From
Free
Free plan
Yes
Full reviewWebsite
Silent Eight logo

Silent Eight

Cybersecurity

AI adjudication of sanctions screening and AML alerts

From
On request
Free plan
No
Full reviewWebsite

The short version

  • Only Hookdeck has a free tier, so it costs nothing to try first.
  • Each has a real cost: Hookdeck pricing meters delivered events, so fan-out multiplies the bill: one inbound event routed to four services counts as four deliveries.; 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: Hookdeck covers Ingest and persist, Silent Eight covers Alert adjudication.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Hookdeck and Silent Eight actually diverge.

Attributes where Hookdeck and Silent Eight differ
AttributeHookdeckSilent Eight
Starting priceFreeOn request
Pricing modelPer month by delivered event countquote
Free tierYesNo
PlatformsWeb, Linux, macOS, WindowsWeb, Linux
CategoryDeveloper ToolsCybersecurity

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

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 Hookdeck

  • Ingest and persist
  • Automatic retries
  • Filters and fan-out
  • Transformations
  • Local development CLI
  • Rate limiting

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.

Hookdeck

  • A payments integration where losing a Stripe event during a deploy causes an order to go unfulfillednot Silent Eight
  • Fanning one provider webhook out to several internal services without each subscribing separatelynot Silent Eight
  • Debugging a partner integration by replaying the exact failing payload after shipping a fixnot Silent Eight
  • Receiving production-shaped webhooks on a developer laptop without running a public tunnelnot Silent Eight

Silent Eight

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

Where each one falls short

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

Hookdeck

  • Pricing meters delivered events, so fan-out multiplies the bill: one inbound event routed to four services counts as four deliveries.
  • Free-tier retention is three days, which is shorter than the time it typically takes to notice a failing integration, so the payloads needed for a replay are often already gone.
  • It becomes a single point of failure in front of every third-party integration, and an outage there means every provider webhook queues or fails at once.
  • The transformation layer runs JavaScript in a constrained environment, so anything that needs a database lookup or an external call has to happen downstream instead.
  • For a team already running Kafka or SQS the value is mostly the console and the replay UI, which is a hard cost to justify against infrastructure they already operate.

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

Hookdeck

Free
  • DeveloperFree
    • Up to ten thousand events per month
    • Three-day retention
    • One user
  • Team$39/month
    • Ten thousand events included
    • Unlimited users
    • Pay as you go metering above the included events
  • Growth$499/month
    • Ten thousand events included plus metered usage
    • Thirty-day retention
    • Uptime and latency SLAs
  • Enterprise$undefined/year
    • Negotiated event volume
    • Custom retention
    • Dedicated support

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 Hookdeck if

  • You need ingest and persist.
  • You want to start without paying.
  • You work on Web, Linux, macOS, Windows.
  • You also want automatic retries.
Hookdeck 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 Hookdeck or Silent Eight better?
Neither clearly leads. Hookdeck 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, Hookdeck or Silent Eight?
Hookdeck has a free tier; the other does not. Paid plans start at Free for Hookdeck and On request for Silent Eight.
Does Hookdeck or Silent Eight run on more platforms?
Hookdeck runs on Web, Linux, macOS, Windows. Silent Eight runs on Web, Linux.
Can I use Hookdeck for free?
Yes. Hookdeck has a free tier, so you can try it without paying. Silent Eight starts at On request.
What is Hookdeck best used for?
Hookdeck is most often used for a payments integration where losing a stripe event during a deploy causes an order to go unfulfilled, fanning one provider webhook out to several internal services without each subscribing separately, debugging a partner integration by replaying the exact failing payload after shipping a fix, receiving production-shaped webhooks on a developer laptop without running a public tunnel. Of those, a payments integration where losing a stripe event during a deploy causes an order to go unfulfilled and fanning one provider webhook out to several internal services without each subscribing separately are not what Silent Eight is typically brought in for.
What can Hookdeck do that Silent Eight cannot?
Hookdeck covers Ingest and persist, Automatic retries, Filters and fan-out, Transformations. Silent Eight covers Alert adjudication, Narrative generation, Name screening automation, Quality assurance.

Answered from the vendors’ own pages

Hookdeck: Is there a free plan?

Yes, ten thousand events a month with three-day retention and one user.

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.

Hookdeck: How is usage counted?

By delivered events, so a single inbound webhook fanned out to three destinations counts as three.

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.

Hookdeck: Can I replay a failed webhook?

Yes, individually or in bulk from the console, with the original payload.

Silent Eight: Where is the company based?

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

Hookdeck: Does it work for outbound webhooks too?

Yes, the same queueing, retry and observability applies to webhooks you send.

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