How much does Sphinx cost?

Sphinx publishes a single tier, Sphinx, at Free.

Does Sphinx have a free plan?

Yes. The Sphinx tier costs nothing and covers full functionality, commercial use permitted, community support.

Which documentation tools can I use without paying?

4 of the 5 documentation tools listed alongside Sphinx have a free tier: Read the Docs, MkDocs, GitBook, Grammarly.

Does Sphinx charge per user?

The record carries a price and a billing period for each of its 1 tiers, but not the unit that price is charged in. Per-seat and flat-rate billing look identical in this data, so check the vendor's page before budgeting for a team.

Are these Sphinx prices current?

They are what the catalogue entry holds, refreshed when the entry is. Vendors change pricing without notice and nobody at Softwr re-verifies each tier by hand, so treat this as a structured summary and the vendor's own pricing page as the authority.

What should I compare Sphinx against before paying?

The closest documentation tools in this directory are Redocly, Read the Docs, MkDocs, GitBook. Each has a side-by-side comparison with Sphinx covering price, platforms and features.

Documentation · pricing

Sphinx pricing

Sphinx publishes a single tier. Below is what it costs, what it covers, and how that compares with the documentation tools listed alongside it.

Entry price: Free
Model: Open source, no licence fee
Tiers: 1
Free tier: Yes

Sphinx plans, side by side

Every published tier in ascending order of price, with the number of features each one lists. An absence here means the record does not itemise it, not that the tier lacks it.

Sphinx pricing tiers
Plan	Price	Features listed	Step up from the tier below
Sphinx	Free	3	Entry tier

Where Sphinx stops being free

Sphinx, Free

Full functionality
Commercial use permitted
Community support

No paid tier on record

Sphinx lists a free tier and no priced tier above it in the record we hold.

What the product covers

The full Sphinx feature record, grouped as the catalogue groups it. This is the product as a whole; the record does not map every feature onto a specific tier.

Other

Cross-references
API autodoc
Multi-format output
Extension ecosystem

People bring Sphinx in for large technical documentation needing reliable cross-references, python projects generating api docs from docstrings, documentation that must ship as pdf as well as html. If that is not the job you are buying for, the alternatives to Sphinx are worth a look before you commit to a tier.

How that compares in Documentation

Too few documentation tools in this directory publish a starting price to quote a meaningful median, so the table below is a like-for-like list rather than a ranking.

Sphinx entry price against other Documentation tools
Tool	Entry price	Model	Rated	Head to head
Sphinx (this page)	Free	Open source, no licence fee	-
Redocly	On request	Free open-source CLI and Redoc renderer; paid plans for the portal, published on the vendor site	-	vs Sphinx
Read the Docs	Free	Free for open source; paid business plans for private documentation	-	vs Sphinx
MkDocs	Free	Open source, no licence fee	-	vs Sphinx
GitBook	Free	Free tier with paid team plans; see vendor for current rates	-	vs Sphinx
Grammarly	Free, then $12/month	-	-	vs Sphinx

Ratings are aggregated from third-party sources and imported with each catalogue entry, they are not reviews hosted on Softwr. How each figure is used is set out on the Sphinx badges page.

Before you pay for Sphinx

Three things this page cannot tell you, and all three change the bill. The record carries a price and a billing period but not the unit - per-seat and flat-rate pricing are indistinguishable in this data, so a five-person team may be looking at five times the figure above. It carries no annual rate, so any discount for paying yearly is not something this page can quote. And it carries no trial length.

What it can tell you is the shape of the ladder: a single tier at Free. Because there is a free tier, the cheapest way to answer the rest is to use it before paying anything.

Sphinx runs on linux, macos, windows, and is published by Sphinx of Open source project. The full record is on the Sphinx review, and the rest of the category is under best documentation tools.

Sphinx pricing on the vendor's own site

Sphinx pricing questions

How much does Sphinx cost?: Sphinx publishes a single tier, Sphinx, at Free.
Does Sphinx have a free plan?: Yes. The Sphinx tier costs nothing and covers full functionality, commercial use permitted, community support.
Which documentation tools can I use without paying?: 4 of the 5 documentation tools listed alongside Sphinx have a free tier: Read the Docs, MkDocs, GitBook, Grammarly.
What am I actually paying for with Sphinx?: The record lists 4 features across 1 area: other. In practice it is brought in for large technical documentation needing reliable cross-references, python projects generating api docs from docstrings, documentation that must ship as pdf as well as html.
Does Sphinx charge per user?: The record carries a price and a billing period for each of its 1 tiers, but not the unit that price is charged in. Per-seat and flat-rate billing look identical in this data, so check the vendor's page before budgeting for a team.
Are these Sphinx prices current?: They are what the catalogue entry holds, refreshed when the entry is. Vendors change pricing without notice and nobody at Softwr re-verifies each tier by hand, so treat this as a structured summary and the vendor's own pricing page as the authority.
What should I compare Sphinx against before paying?: The closest documentation tools in this directory are Redocly, Read the Docs, MkDocs, GitBook. Each has a side-by-side comparison with Sphinx covering price, platforms and features.