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APIs · head to head

Gravitee vs Sphinx

Gravitee logo

Gravitee

APIs

Open source API management platform for event-native APIs

From
Free
Rated
-
Full reviewWebsite
Sphinx logo

Sphinx

Documentation

Documentation generator built for large technical projects

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Gravitee the entry paid API management tier is $2,500 a month and includes a single production gateway; Sphinx reStructuredText is harder to write than Markdown and puts off contributors, though MyST now allows Markdown
  • They diverge on capability: Gravitee covers API Gateway, Sphinx covers Cross-references.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Gravitee and Sphinx actually diverge.

Attributes where Gravitee and Sphinx differ
AttributeGraviteeSphinx
Pricing modelfreemiumOpen source, no licence fee
PlatformsCloud, On-premise, KubernetesLinux, macOS, Windows
CategoryAPIsDocumentation
Founded2015Unknown

Identical on both: starting price (Free), free tier (Yes), 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 Gravitee

  • API Gateway
  • Developer Portal
  • Analytics Dashboard
  • Kubernetes
  • Docker
  • Kafka
  • LDAP
  • Cloud support

Only in Sphinx

  • Cross-references
  • API autodoc
  • Multi-format output
  • Extension ecosystem

What people use each for

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

Gravitee

  • API gateway and lifecycle managementnot Sphinx
  • Exposing Kafka event streams as managed APIsnot Sphinx
  • Protocol mediation between event brokers and clientsnot Sphinx
  • Self-hosting an open source API gatewaynot Sphinx
  • Access control and authentication in front of internal APIsnot Sphinx

Sphinx

  • Large technical documentation needing reliable cross-referencesnot Gravitee
  • Python projects generating API docs from docstringsnot Gravitee
  • Documentation that must ship as PDF as well as HTMLnot Gravitee

Where each one falls short

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

Gravitee

  • The entry paid API management tier is $2,500 a month and includes a single production gateway
  • Event management is priced separately, starting at $1,250 a month for the Comet tier
  • Tiers are gated on gateway and broker counts, so scaling horizontally means moving tier rather than paying incrementally
  • Data logging masking and other enterprise features are withheld from the lowest paid tier
  • 24/7 support requires the top Universe tier

Sphinx

  • reStructuredText is harder to write than Markdown and puts off contributors, though MyST now allows Markdown
  • Configuration is complex and the default output is dated-looking without theme work
  • Build times on large documentation sets are slow
  • Heavier than the problem for a small project that only needs a few pages

Pricing, plan by plan

Gravitee

Free
  • CommunityFree
    • API Gateway
    • Basic analytics
    • Community support
  • Enterprise$1500/monthly
    • Advanced features
    • SLA support
    • SSO integration
  • Custom$undefined/monthly
    • Custom deployment
    • Dedicated support
    • Premium SLA

Sphinx

Free
  • SphinxFree
    • Full functionality
    • Commercial use permitted
    • Community support

Which should you pick?

Choose Gravitee if

  • You need api gateway.
  • You want to start without paying.
  • You work on Cloud, On-premise, Kubernetes.
  • You also want developer portal.
Gravitee review

Choose Sphinx if

  • You need cross-references.
  • You want to start without paying.
  • You work on Linux, macOS, Windows.
  • You also want api autodoc.
Sphinx review

Questions people ask

Is Gravitee or Sphinx better?
Neither clearly leads. Gravitee starts at Free and Sphinx at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Gravitee or Sphinx?
Gravitee starts at Free and Sphinx at Free.
Does Gravitee or Sphinx run on more platforms?
Gravitee runs on Cloud, On-premise, Kubernetes. Sphinx runs on Linux, macOS, Windows.
Can I use Gravitee for free?
Both have a free tier, so you can try either at no cost before committing.
What is Gravitee best used for?
Gravitee is most often used for api gateway and lifecycle management, exposing kafka event streams as managed apis, protocol mediation between event brokers and clients, self-hosting an open source api gateway. Of those, api gateway and lifecycle management and exposing kafka event streams as managed apis are not what Sphinx is typically brought in for.
What can Gravitee do that Sphinx cannot?
Gravitee covers API Gateway, Developer Portal, Analytics Dashboard, Kubernetes. Sphinx covers Cross-references, API autodoc, Multi-format output, Extension ecosystem.

Answered from the vendors’ own pages

Gravitee: What is Gravitee's pricing model?

Gravitee uses a tiered subscription model with monthly flat pricing. The Planet tier for API Management starts at $2,500/month with one production gateway, while the Comet tier for Event Management starts at $1,250/month.

Source
Sphinx: Is Sphinx free?

Yes, open source under the BSD licence.

Gravitee: Are there hidden fees with Gravitee?

No. Gravitee explicitly states there are no hidden fees, and all tiers include unlimited users and unlimited APIs under management.

Source
Sphinx: Do I have to write reStructuredText?

Not any more. The MyST extension allows Markdown, though reStructuredText remains the native format and most examples use it.

Gravitee: What does higher tier pricing include in Gravitee?

Higher tiers add more production gateways, enterprise plugins, and enhanced support levels ranging from Gold to Platinum/Diamond support.

Source
Sphinx: Why do large projects choose Sphinx?

Automatic cross-referencing and API extraction from docstrings, which lighter generators do not provide.

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