Buyer’s guide Β· Technology
Best Developer Documentation Software in 2026: Pricing & Comparison
Four developer-docs platforms compared on published site, seat and plan prices, checked 6 October 2026.
- API team that can start at $0: ReadMe β Starter is free, Pro is $250/month billed annually.
- Docs site plus a known user price: GitBook β free site, then $65 per site/month and $12 per user/month, both on annual billing.
- Lowest published seat price: Redocly β Pro at $10 per seat/month billed monthly.
- Hosted docs with agent credits: Mintlify β Pro at $450/month on the page we loaded.
Developer documentation software hosts guides, API references and search for people and coding agents. It is not a support help desk.
Every company uses the same fields: published pricing, free plan or trial, core focus and the main limitation. The order is not a quality ranking. Public $0 / published price first, quote-led last.
Compared at a glance
| Platform | Pricing | Best for | Link |
|---|---|---|---|
| 1. ReadMe | Starter $0/month. Pro $250/month billed annually. Ask AI add-on $150/month. Enterprise contact. | An API company that wants a free starter project | Site β |
| 2. GitBook | Free $0 per site for 1 user. Premium $65 per site/month annually, plus $12 per user/month. Ultimate $249 per site. | A team that wants a free site, then a published per-site price | Site β |
| 3. Redocly | Pro $10 per seat/month billed monthly. Enterprise +$24 per seat. Realm adds $18 per seat on Pro. | An API team that wants a low published seat price | Site β |
| 4. Mintlify | Pro $450/month on the page we loaded. Enterprise contact. Starter dollar price not captured. | A team comparing a published Pro plan with agent credits | Site β |
Prices checked on 6 October 2026 from readme.com/pricing, gitbook.com/pricing, redocly.com/pricing and mintlify.com/pricing. Mintlifyβs Starter dollar price was not in the text captured that day.
How the market splits
ReadMe bills the project. GitBook bills the site and the user. Redocly bills the seat and the product bundle. Mintlify bills the plan, then AI credits. A three-person API team can be cheaper on Redocly than on ReadMe Pro or Mintlify Pro, and still need Enterprise for SSO.
The 4 companies in detail
ReadMe
Free starter, then a published annual Pro price
Best for: API companies that want interactive reference docs and a $0 start.
| Attribute | ReadMe |
|---|---|
| Published pricing | Starter $0/month. Pro $250/month billed annually. Ask AI $150/month add-on. |
| Free plan or trial | Starter is free. Pro has a trial button. |
| Core focus | API reference, metrics, recipes and an MCP server on Starter. |
| Main limitation | Starter is one project and one published version. |
- Ask AI is a $150/month add-on on Starter, Pro and Enterprise.
- Extended request history is a separate $100/month add-on.
- Enterprise is the plan that removes ReadMe branding and adds SSO. Extra Pro admins are $20.
GitBook
Free site, then a site fee plus a user fee
Best for: teams that mix product docs and a wiki-style editor.
| Attribute | GitBook |
|---|---|
| Published pricing | Free $0. Premium $65 per site/month annually. Users $12/month. Ultimate $249 per site/month annually. |
| Free plan or trial | Free plan for one user. Annual billing shows two months free versus monthly. |
| Core focus | Published docs, Git sync, AI assistant credits and an MCP server. |
| Main limitation | Paid collaboration is per user on top of the site fee. |
- Premium is $65 per site/month and Ultimate is $249 when billed annually.
- AI Assistant Ask is 20 credits per relevant question on paid plans.
- A 5,000-credit pack is listed at $47.50. AI credits are metered.
Redocly
Lowest published seat price in this set
Best for: teams whose main job is OpenAPI reference docs and linting.
| Attribute | Redocly |
|---|---|
| Published pricing | Pro $10 per seat/month billed monthly. Enterprise +$24 per seat. Realm adds $18 per seat on Pro. |
| Free plan or trial | No $0 plan was shown on the pricing view we loaded. |
| Core focus | Redoc reference docs, Revel markdown, Reef catalog. |
| Main limitation | Price changes with the products you toggle. |
- Monthly billing is the view that showed $10 and $24.
- Realm is the bundle of Redoc, Revel and Reef.
- Enterprise+ is custom and billed yearly. Respect Monitoring is usage-priced.
Mintlify
Published Pro plan, enterprise is contact
Best for: teams that want a designed docs site and agent credits on a higher published plan.
| Attribute | Mintlify |
|---|---|
| Published pricing | Pro $450/month on the page loaded 6 October 2026. Enterprise is contact sales. |
| Free plan or trial | A try-for-free button is on the page. A Starter dollar amount was not captured. |
| Core focus | Docs editor, API playground, Git sync, assistant on Pro. |
| Main limitation | SSO, SCIM and white labeling are Enterprise. |
- Starter lists 5 editor seats. Pro lists unlimited editor seats.
- Pro includes 10,000 agent credits a month.
- PDF export and dashboard SSO are marked not included until Enterprise. Do not budget a Starter price from this page.
Kurums Match
We want a $0 API reference projectOne project
We want a free site and a known user priceSite plus seats
GitBook Free, then Premium at $65 per site/month annually plus $12 per user.
We want the lowest published seat priceBefore bundle add-ons
Redocly Pro at $10 per seat/month billed monthly.
We want agent credits in the published planHigher plan
Mintlify Pro at $450/month with 10,000 credits. Confirm the Starter price on the live page.
Buying tip
Count seats and sites separately. GitBook Premium for one site and three extra users is not $65. ReadMe Pro is one project. A second API project is an Enterprise conversation.
FAQ
Is a knowledge-base tool the same thing?
Do readers pay a seat?
GitBookβs user price is for collaborators. Redoclyβs FAQ asks whether readers are charged. Confirm that on the live page. ReadMe Starter is one project, not a per-reader fee.
Why is Mintlifyβs free price missing?
The pricing page showed a Starter column and a Pro price of $450/month. The Starter dollar figure was not in the text captured on 6 October 2026.
Does the order mean ReadMe is better?
No. Order is public $0 first, then the lowest published paid unit. It is not a quality rank.
Related comparisons
Last updated 6 October 2026. Pricing checked 6 October 2026.
Disclosure: Kurums is reader-supported. Some outbound links are marked sponsored and nofollow. They do not change order, labels or conclusions. This page has no Kurums Recommends, Top Pick or Verified badge.
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