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Databases · head to head

Knack vs RabbitMQ

Knack logo

Knack

Databases

Hosted no-code database and web app builder priced by stored records and storage, with unlimited user accounts on every plan.

From
$59/month
Rated
-
Full reviewWebsite
RabbitMQ logo

RabbitMQ

Databases

Open-source message broker supporting AMQP and other protocols

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only RabbitMQ has a free tier, so it costs nothing to try first.
  • Each has a real cost: Knack plans are capped by stored records, so an application that logs events or keeps history rather than current state climbs tiers on data volume alone, and archiving old records becomes a permanent maintenance chore rather than a one-off.; RabbitMQ not built for replay: once consumed, a message is gone, which is exactly what Kafka exists to change
  • They diverge on capability: Knack covers Visual database builder, RabbitMQ covers Flexible routing.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Knack and RabbitMQ actually diverge.

Attributes where Knack and RabbitMQ differ
AttributeKnackRabbitMQ
Starting price$59/monthFree
Pricing modelsubscriptionOpen source, no licence fee; managed services billed separately
Free tierNoYes
PlatformsWebLinux, macOS, Windows, Docker, Kubernetes

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

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 Knack

  • Visual database builder
  • User logins and roles
  • Page builder
  • Unlimited users
  • E-commerce
  • Automation flows
  • Scheduled tasks
  • REST API and webhooks

Only in RabbitMQ

  • Flexible routing
  • Multiple protocols
  • Management UI
  • Clustering and mirroring

What people use each for

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

Knack

  • A member or client portal where thousands of external people need their own login and see only their own recordsnot RabbitMQ
  • Replacing a shared spreadsheet used by a team that has outgrown it but cannot justify a developer to build a bespoke internal toolnot RabbitMQ
  • Inventory, asset or case tracking for a small operations team that needs roles, forms and a record of who changed whatnot RabbitMQ
  • A registration or booking application for an association, school or non-profit where the user count is large and the record count stays modestnot RabbitMQ

RabbitMQ

  • Distributing background jobs to a pool of workers with retriesnot Knack
  • Decoupling services that need delivery rather than a replayable historynot Knack
  • Routing messages by pattern to different consumers from one publishernot Knack

Where each one falls short

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

Knack

  • Plans are capped by stored records, so an application that logs events or keeps history rather than current state climbs tiers on data volume alone, and archiving old records becomes a permanent maintenance chore rather than a one-off.
  • API access is capped per day, at 1,000 calls on the entry plan and 10,000 at the Corporate tier, so a scheduled sync or a busy automation can exhaust the day's quota before the working day ends and integrations then fail silently.
  • The application itself cannot be exported or self-hosted; records can be downloaded but the pages, roles, flows and business logic exist only inside Knack, so outgrowing the platform means rebuilding the app rather than moving it.
  • Customisation beyond the builder is limited to injected CSS and JavaScript that Knack's support does not cover, so any non-standard interface behaviour becomes yours to maintain against a DOM the vendor can change without warning.
  • Compliance capabilities that regulated buyers assume are baseline, HIPAA and GovCloud options, advanced SSO, IP restrictions and private environments, are gated to the Corporate and Enterprise tiers, so a small regulated pilot cannot legitimately start on an entry plan.

RabbitMQ

  • Not built for replay: once consumed, a message is gone, which is exactly what Kafka exists to change
  • Throughput ceilings are lower than a log-based platform under very heavy streaming loads
  • Queues that build up degrade broker performance, so consumer lag is an operational problem rather than just a backlog
  • Clustering and partition behaviour has historically been a source of hard-to-diagnose problems

Pricing, plan by plan

Knack

$59/month
  • Starter$59/month
    • 20,000 database records
    • Unlimited users, tables, fields
    • 25 AI credits
  • Pro$130/month
    • 50,000 database records
    • Remove Knack branding
    • E-commerce payments
  • Corporate$300/month
    • 125,000-2.5M database records
    • App restore functionality
    • Advanced SSO
  • Enterprise$null/month
    • Dedicated account manager
    • HIPAA/GovCloud-based options
    • Custom pricing

RabbitMQ

Free
  • RabbitMQFree
    • Full functionality
    • Self-hosted
    • No usage limits

Which should you pick?

Choose Knack if

  • You need visual database builder.
  • You also want user logins and roles.
Knack review

Choose RabbitMQ if

  • You need flexible routing.
  • You want to start without paying.
  • You work on Linux, macOS, Windows, Docker, Kubernetes.
  • You also want multiple protocols.
RabbitMQ review

Questions people ask

Is Knack or RabbitMQ better?
Neither clearly leads. Knack starts at $59/month and RabbitMQ at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Knack or RabbitMQ?
RabbitMQ has a free tier; the other does not. Paid plans start at $59/month for Knack and Free for RabbitMQ.
Does Knack or RabbitMQ run on more platforms?
Knack runs on Web. RabbitMQ runs on Linux, macOS, Windows, Docker, Kubernetes.
Can I use RabbitMQ for free?
Yes. RabbitMQ has a free tier, so you can try it without paying. Knack starts at $59/month.
What is Knack best used for?
Knack is most often used for a member or client portal where thousands of external people need their own login and see only their own records, replacing a shared spreadsheet used by a team that has outgrown it but cannot justify a developer to build a bespoke internal tool, inventory, asset or case tracking for a small operations team that needs roles, forms and a record of who changed what, a registration or booking application for an association, school or non-profit where the user count is large and the record count stays modest. Of those, a member or client portal where thousands of external people need their own login and see only their own records and replacing a shared spreadsheet used by a team that has outgrown it but cannot justify a developer to build a bespoke internal tool are not what RabbitMQ is typically brought in for.
What can Knack do that RabbitMQ cannot?
Knack covers Visual database builder, User logins and roles, Page builder, Unlimited users. RabbitMQ covers Flexible routing, Multiple protocols, Management UI, Clustering and mirroring.

Answered from the vendors’ own pages

Knack: Is Knack charged per user?

No. User accounts are unlimited on all plans. Plans are bounded by stored record count, file storage, API calls per day and automation transactions.

RabbitMQ: Is RabbitMQ free?

Yes, open source with no licence fee. Broadcom sells commercial support.

Knack: What happens when I exceed the record limit?

You move to a higher tier or reduce stored records. Because the limit is on data rather than people, apps that accumulate history hit it while apps that track a fixed set of entities generally do not.

RabbitMQ: RabbitMQ or Kafka?

RabbitMQ is a message broker: simpler to run and better at flexible routing and work queues. Kafka is a replayable event log built for very high throughput streaming, and much heavier to operate.

Knack: Can I export my application or self-host it?

You can export record data. The application itself, its pages, roles, permissions and flows, is not exportable and cannot be self-hosted, so leaving means rebuilding elsewhere.

RabbitMQ: Can RabbitMQ replay messages?

Not in the way Kafka can. Messages are removed once acknowledged, so rebuilding state from history is not the model.

Knack: Is it suitable for public-facing portals?

That is its strongest case, because logins are unlimited and role-based permissions are built in. The constraint is record volume and API throughput, not audience size.

Knack: Can I use it for regulated data?

HIPAA-aligned and government cloud options exist but only on the Enterprise tier, along with private server environments. Lower tiers should not be used for regulated workloads.

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