Two products that start from the same OpenAPI file and split on who the editor is built for.
TLDR: ReadMe and Redocly both turn an OpenAPI file into an interactive API reference, and both put every change through a branch before it goes live. Redocly is sold as a suite, priced per seat and per product: a reference with a mock server built into its API console, a browser editor that works in files and pull requests, and an internal catalog that finds APIs nobody documented, which ReadMe doesn't offer. It's also cheaper to start, at $50/mo for five people. ReadMe costs more at Pro, but puts a visual editor, analytics and shipped AI review on one plan, and connects what happens in your docs to what happens in your API. If your problem is governing many APIs across many teams, Redocly likely fits. If your API is the product and adoption is the number, ReadMe is built around proving that.
ReadMe and Redocly end up on the same shortlist because both publish an API reference from an OpenAPI spec and both sync two ways with Git. They start from different first questions. Redocly starts from "how does every API in a company get described, linted and governed from Git," and its public docs are one product in that suite. ReadMe starts from "what happens to a developer after they read the page."
That difference decides most of this, and it shows up in the editor before it shows up in the price.
At a glance
ReadMe pricing from readme.com/pricing, Redocly pricing from redocly.com/pricing, both checked October 5, 2026. Redocly prices each product per seat, so build your own row from the seats and products you'd actually buy, and check both live pages before trusting either number, ours included.
Start with how each one is sold, because it decides the rest
Key difference: Redocly sells the pieces separately and lets you add them later. ReadMe sells one plan with the pieces already in it.
Redocly is four products. Redoc is the reference, and its open-source renderer is still free and widely used on its own. Revel is the external developer portal. Reef is an internal catalog for every API across your teams. Realm bundles all three. Each is priced per seat, and you add the next one when you need it.
That's a real advantage if you know exactly which piece you need. A team that only wants a hosted reference pays for the reference and nothing else.
ReadMe ships as one plan. The API Reference, the Developer Dashboard, Branches, and the AI surfaces are all in Pro from day one, and Starter is free with no time limit. Redocly's pricing page lists no free plan: it starts at Pro.
Who can open the editor, and what they see when they do
Key difference: both put every change through a branch. Redocly's editor shows you the files and the Git steps. ReadMe's shows you the page.
Redocly's Reunite editor runs in the browser and works on files: you create a branch, edit Markdown and config files, and save by committing, then open a pull request that teammates comment on or approve. A Webview tab previews each change as you type, and every pull request gets a deploy preview. Nothing reaches the published site without a merged pull request.
That's a clean, strict model, and it's exactly right for a team where engineers already own the docs. Redocly's own customers say so: Brex's Ernie Park says their reference is "extremely easy to update" because "engineers just worry about the code."
It also asks every contributor to think in files, branches and commits. ReadMe's web editor is visual, with components from a command menu and Multiplayer editing on Pro. Changes still land on a branch, the AI Linter checks them automatically, and a reviewer sees the diff before it merges. Nobody making the change has to commit anything or open a pull request, and engineers who'd rather work in Git keep doing exactly that through Bi-directional sync.
ReadMe was the best of both worlds, where it supported all the technical automations we wanted, supported all of our API standards and specifications, and was future-proofed. And then, on the technical writing and documentation side, it offers a rich text editor and allows for anyone to go and update documentation when needed.
One honest caveat on our side. On Starter and Pro every ReadMe teammate is an Admin, so nothing enforces that review can't be skipped. Restricted roles that actually block a merge are Enterprise on ReadMe. Redocly's editor puts every change on a branch, on every plan.
What happens after the request runs
Key difference: Redocly lets you test before your API exists. ReadMe shows you what happened after it did.
Redocly's Replay can point at your live servers, a built-in mock server, or another environment, keeps a history of past requests, and lets you edit any field in a sample request. Testing against a mock before your API is even live is a useful option, and ReadMe doesn't have it.
In ReadMe, a Try It! request is logged into the Developer Dashboard next to the traffic your API receives through the Metrics SDK. My Developers filters by API key, email or company and replays what one developer sent, so a support ticket that says "your API is broken" comes with their last twenty requests attached. Docs page views split Agent vs Human, page by page, in the same place.
Redocly's analytics, on Enterprise, cover page views, search queries including the ones that returned nothing, AI Assistant conversations, top pages and referring domains. That's real visibility into what people read and ask. It doesn't reach what that developer's API key did in production.
The API catalog, which is the thing we do not do
Key difference: Reef tells you what APIs your company has. ReadMe tells you what developers do with the one you publish.
Reef is an internal catalog for every API definition, version and owner in your organization. Scorecards grade API health and quality, and API Scout finds hidden, underused or duplicate APIs across your codebase. The open-source Redocly CLI lints API descriptions in CI, so a broken spec fails the build instead of reaching production.
ReadMe doesn't sell an internal catalog. If the question keeping you up is "we have forty teams and no idea how many APIs they've shipped," that's Redocly's problem to solve and not ours. Say so in your evaluation rather than discovering it in month two.
AI, and where each one draws the line
Key difference: ReadMe's AI writing and linting ship today on Pro. Redocly's AI review is in early access and its writing agent is still on the roadmap.
ReadMe's free tier ships the AI Dropdown, LLMs.txt and the MCP Server. Pro adds Ask AI Lite, Agent Owlbert, the AI Linter on every branch, and GitHub AI Writer, which opens a branch with suggested changes for a person to review and merge. Full Ask AI is a $150/mo add-on on any tier, unmetered.
Redocly's Docs MCP server gives agents search, API listings and endpoint details, with access controlled by the same RBAC as the rest of the project and an optional public endpoint for content that doesn't need a login. It also includes a submit-feedback tool an agent calls when a page it relied on was wrong or out of date, which is a good idea. MCP servers and AI search are Enterprise.
Redocly's Reviewer leaves line-level comments on pull requests in GitHub, GitLab, Bitbucket or Azure DevOps, covering API descriptions, docs clarity, OWASP API security risks and cross-document consistency. It comments rather than writing changes, and it's in early access. A Writer agent that would open pull requests to fix documentation gaps is listed under what's next in Redocly's August 14 update, not under what shipped.
Both companies land in the same place on the part that matters: AI proposes, a person merges.
The pricing math, run honestly
Redocly is cheaper than ReadMe for a small team, and the gap is large.
Five people on Redocly Pro is $50 a month for the reference, the Reunite editor and a custom domain. Five on Redocly Enterprise is $120 a month, which adds SSO, RBAC, analytics, AI search and MCP servers. ReadMe Pro is $250 a month for the same five people, and SSO is Enterprise on our side.
On the base Enterprise plan, Redocly stays cheaper at ten people too: $240 a month against ReadMe Pro's $350 with five extra admins. The math changes in two places. Realm is an add-on on top of the base seat, so ten people on Enterprise with the portal and the catalog pay $66 a seat, or $660 a month. And the page caps arrive early: 100 pages on Pro, 500 on Enterprise, and past that is Enterprise+.
What ReadMe's $250 buys against Redocly's $50 is the API-side half of the product: Try It! requests logged next to production traffic, a visual editor for people who'd rather not see files, and the AI Linter and GitHub AI Writer shipping today. If your contributors are all engineers and your reference is a reference rather than a place people work, that premium is buying you something you won't use yet.
Who owns each platform
Both are independent, in a category that has consolidated fast this year.
Postman acquired Fern in January 2026, so it's worth knowing who you're signing with.
Redocly traces back to 2016, when Redoc shipped as open source out of Rebilly, a Texas payments company. Redocly incorporated in 2018 and remains independent, with Australia Post, Checkr, Brex and Sinch among its named customers.
ReadMe has been building API documentation since 2014, independent, with no acquisition and no wind-down. Asana, OneTrust, NVIDIA and Akamai run their docs on it, and so do brand-new YC startups.
Ask either of us directly before you build a year of documentation on the answer.
Which one should you choose?
It usually comes down to whether your problem is governing many APIs or getting one API adopted.
Choose Redocly if you're a platform team documenting many APIs from Git, if an internal catalog and spec linting in CI matter as much as the public reference, if everyone who'll contribute is comfortable in files and pull requests, or if you want to start small and add products as you go.
Choose ReadMe if API adoption is the number you're measured on and you want Try It! requests and production API calls in one dashboard, if writers, PMs and support need to ship fixes without touching Git, or if you want AI review and writing that's shipped rather than in early access.
The two can also split cleanly: Reef as the internal catalog, ReadMe as the public hub, both reading the same OpenAPI file.
Switching costs, in both directions
Markdown moves without much drama, and your OpenAPI spec is portable by definition.
That's the strongest argument for keeping the spec as your source of truth no matter who hosts your docs.
What doesn't move is anything built against the other platform's model. Redocly content uses Markdoc tags, such as its Replay tag, and those need converting to ReadMe's MDX-ish components. Navigation and access rules in redocly.yaml get rebuilt, and Reef's catalog has no ReadMe equivalent to import into. Going the other way, MDX-ish components need converting to Markdoc.
Redirects, information architecture and versioning are where migrations actually spend their time, and our enterprise migration guide covers them.
FAQs
The specifics, answered directly.
Does Redocly have a web editor?
Yes. Reunite's browser-based editor edits Markdown and config files on a branch, with a live preview, and saves through commits and pull requests. It suits people comfortable with files and Git steps. ReadMe's web editor is visual, and routes changes through a branch without asking anyone to commit or open a pull request.
Which is cheaper?
For a small team, Redocly: $50/mo for five people on Pro, or $120/mo on Enterprise, against ReadMe Pro's $250/mo. It flips when you add the portal and catalog through Realm, or pass the 100- or 500-page caps. Both pricing pages checked October 5, 2026.
Can I test against a mock API before mine is live?
On Redocly, yes: Replay can target a built-in mock server, a saved environment or your live servers. ReadMe's Try It! sends requests to your real API and has no built-in mock server.
Does either one's AI write or review docs?
ReadMe's GitHub AI Writer opens a branch with suggested changes, and the AI Linter checks every branch, both shipped on Pro. Redocly's Reviewer comments on pull requests and is in early access, and its Writer agent is announced but not shipped. Neither publishes anything without a person merging it.
Is Redocly a reasonable choice for API documentation?
Yes, particularly for a platform team documenting many APIs from Git, where linting specs in CI and cataloging internal APIs matter as much as the public reference. What you give up is the connection between docs behavior and API behavior, and an editor for teammates who'd rather not work in files.
Try it against your own spec
Point both at your real OpenAPI file and move twenty real pages into each. An afternoon of that tells you more than any comparison table, ours included.
Get started free, or book a demo and we'll run it against your spec. Already decided to move? Start with the enterprise migration guide for what transfers and what has to be rebuilt.
Curious why we put Git underneath the editor instead of in front of it? We rebuilt ReadMe's backend on Git to make branching and true sync possible, and wrote up the journey.
