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Documentation · head to head

Nuclino vs Outline

Nuclino logo

Nuclino

Documentation

Fast team wiki with list, board and graph views of the same content

From
Free
Rated
-
Full reviewWebsite
Outline logo

Outline

Documentation

Team knowledge base under the Business Source Licence, self-hostable or vendor hosted

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Nuclino there is no publishing layer, so a public help centre or versioned product documentation cannot live here and has to be maintained in a second tool.; Outline the Business Source Licence is not an open source licence, so anyone planning to host Outline for clients, resell it or embed it in a commercial service is prohibited until the per-release change date passes, and this is regularly discovered only at legal review.
  • They diverge on capability: Nuclino covers Item graph, Outline covers Structured collections.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Nuclino and Outline actually diverge.

Attributes where Nuclino and Outline differ
AttributeNuclinoOutline
Pricing modelPer user per monthFree to self-host, per user per month when hosted by the vendor
PlatformsWeb, macOS, Windows, iOS, AndroidWeb, Self-hosted, Docker, iOS, Android

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Documentation).

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 Nuclino

  • Item graph
  • Multiple collection views
  • Real time editing
  • Instant search
  • Version history
  • EU hosting

Only in Outline

  • Structured collections
  • Block editor
  • Search
  • Backlinks and mentions
  • Templates
  • API and webhooks
  • Single sign-on
  • Self-hosting

What people use each for

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

Nuclino

  • A small company that wants internal process notes searchable without running a wiki platformnot Outline
  • Teams that need to see how internal documents relate to each other rather than filing them in foldersnot Outline
  • Organisations that must keep internal knowledge hosted inside the European Unionnot Outline
  • Replacing scattered shared documents where search, not layout, is the actual problemnot Outline

Outline

  • Running an internal wiki on your own infrastructure when documentation cannot leave a specific jurisdictionnot Nuclino
  • Replacing a general-purpose workspace tool with something narrower where search speed and writing flow matter mostnot Nuclino
  • Keeping engineering decision records and postmortems in templated documents that link to each other automaticallynot Nuclino
  • Giving a company already standardised on Google or Okta a wiki that inherits identity and group membership directlynot Nuclino

Where each one falls short

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

Nuclino

  • There is no publishing layer, so a public help centre or versioned product documentation cannot live here and has to be maintained in a second tool.
  • The free plan is capped at roughly fifty items, which a real team passes within weeks, making it a trial rather than a usable tier.
  • Per user pricing means occasional readers who open a document twice a month cost the same as the writers who maintain it.
  • The editor is intentionally limited, with no databases, relations or page-level templates, so structured content such as a request register needs a different product.
  • Export options are limited to Markdown and PDF per item, so moving a large workspace elsewhere is a bulk conversion job rather than a supported migration.

Outline

  • The Business Source Licence is not an open source licence, so anyone planning to host Outline for clients, resell it or embed it in a commercial service is prohibited until the per-release change date passes, and this is regularly discovered only at legal review.
  • There is no local password authentication, so self-hosting requires an identity provider to be in place first, which turns a small internal wiki into a project with a dependency on Google, Okta, Entra or a Keycloak instance somebody has to run.
  • Self-hosting needs Postgres, Redis and S3-compatible object storage together, so the operational footprint is larger than the single database most internal wikis require.
  • The hosted plans offer no customer-selectable hosting region, so buyers with data residency obligations are pushed to self-hosting even when they would have paid to avoid running servers.
  • It is built for internal knowledge rather than public documentation, with no versioned documentation sets, no static output and limited public publishing, so it will not serve as a product documentation site.
  • Because it is a single-vendor project rather than a foundation-governed one, a future licence or pricing change applies to new releases and the only defence is staying on an older version.

Pricing, plan by plan

Nuclino

Free
  • FreeFree
    • Around 50 items in total
    • Limited storage
    • Core editing and search
  • Starter$6/month
    • Per user per month
    • Unlimited items and version history
    • Larger file uploads
  • Business$12/month
    • Per user per month
    • Single sign-on and admin controls
    • Private workspaces and audit features

Outline

Free
  • Self-hostedFree
    • Source available under the Business Source Licence
    • No licence fee for use inside your own organisation
    • Requires Postgres, Redis and S3-compatible storage
  • Team (hosted)$undefined/month
    • Charged per user per month
    • Hosted and maintained by the vendor
    • Single sign-on through Google, Slack or Microsoft
  • Enterprise (hosted)$undefined/month
    • SAML single sign-on and provisioning
    • Administrative controls and audit visibility
    • Negotiated terms and support

Which should you pick?

Choose Nuclino if

  • You need item graph.
  • You want to start without paying.
  • You work on Web, macOS, Windows, iOS, Android.
  • You also want multiple collection views.
Nuclino review

Choose Outline if

  • You need structured collections.
  • You want to start without paying.
  • You work on Web, Self-hosted, Docker, iOS, Android.
  • You also want block editor.
Outline review

Questions people ask

Is Nuclino or Outline better?
Neither clearly leads. Nuclino starts at Free and Outline at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Nuclino or Outline?
Nuclino starts at Free and Outline at Free.
Does Nuclino or Outline run on more platforms?
Nuclino runs on Web, macOS, Windows, iOS, Android. Outline runs on Web, Self-hosted, Docker, iOS, Android.
Can I use Nuclino for free?
Both have a free tier, so you can try either at no cost before committing.
What is Nuclino best used for?
Nuclino is most often used for a small company that wants internal process notes searchable without running a wiki platform, teams that need to see how internal documents relate to each other rather than filing them in folders, organisations that must keep internal knowledge hosted inside the european union, replacing scattered shared documents where search, not layout, is the actual problem. Of those, a small company that wants internal process notes searchable without running a wiki platform and teams that need to see how internal documents relate to each other rather than filing them in folders are not what Outline is typically brought in for.
What can Nuclino do that Outline cannot?
Nuclino covers Item graph, Multiple collection views, Real time editing, Instant search. Outline covers Structured collections, Block editor, Search, Backlinks and mentions.

Answered from the vendors’ own pages

Nuclino: Can Nuclino publish a public documentation site?

No. Individual items can be shared by link, but there is no branded, versioned public site.

Outline: Is Outline open source?

No, not in the OSI sense. It is source available under the Business Source Licence, which permits internal use and self-hosting but not offering it as a service to others, with each release converting to an open source licence after its change date.

Nuclino: Where is the data stored?

In the European Union, by a company registered in Germany, which is usually the reason procurement shortlists it.

Outline: Can I run it for free?

Yes, for your own organisation. Self-hosting carries no licence fee, only the cost of running Postgres, Redis, object storage and an identity provider.

Nuclino: Does it handle translated content?

No. There is no locale model, so translations would be separate items kept in sync by hand.

Outline: Can I choose where the hosted version stores data?

No. The hosted plans do not offer a region choice, so residency requirements mean self-hosting.

Outline: Does it work for public product documentation?

Poorly. It has no versioned documentation sets or static site output, so it is best kept for internal knowledge.

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