Compare the Top Free Software Documentation Tools as of April 2025

What are Free Software Documentation Tools?

Software documentation tools are designed to help developers and technical writers create, manage, and share documentation related to software applications. These tools facilitate the writing of user guides, API references, installation instructions, and other types of technical content. They often include features like version control, templates, collaborative editing, and integration with code repositories to streamline the documentation process. Some popular tools offer support for various output formats, such as HTML, PDF, and Markdown, making it easier to distribute documentation to different audiences. By using these tools, teams can ensure that their documentation remains accurate, up-to-date, and accessible throughout the software development lifecycle. Compare and read user reviews of the best Free Software Documentation tools currently available using the table below. This list is updated regularly.

  • 1
    Interfacing Enterprise Process Center (EPC)
    Interfacing’s Digital Twin Organization software provides transparency and Governance to improve Quality, Efficiency, and ensure Regulatory Compliance. Map, analyze, and automate processes, manage regulatory compliance, assess risks within a single platform! Interfacing’s digital twin solution (Enterprise Process Center - EPC) is an enterprise management system that helps companies digitalize processes to streamline operations, increase productivity, and continuously improve. Interfacing’s digital business platform – Rapid Application Development (RAD) Tools, with its Low-Code Development methodology will optimize usage of your technical resources and maximize transparency for ongoing improvement. Discover how our Low-Code Rapid Application Development module provides all the tools to create and deploy Custom, Scalable, Secure, and Mobile ready Applications in Days vs. Months!
    Starting Price: $10/month/user
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  • 2
    FlowShare

    FlowShare

    miraminds GmbH

    FlowShare® documents every step you take in any software, then delivers a branded process manual you can use to train your staff. FlowShare is a one-of-a-kind documentation tool that runs in the background, automatically documenting every action you take, creating step-by-step guides for your staff to train themselves on complex tasks and processes. It's fast, gets your documentation done in just hours, instead of days or weeks, works with any type of software on Windows and saves time and money training staff. You get easy to distribute accurate information with all of your guides looking great - no matter who creates them! FlowShare AI-Powered assistant provides 24/7 instant help, ready to guide your end-users through troubleshooting and problem-solving independently and enhances your team's ability to adapt and grow with your tech stack. FlowShare Portal provides a Central Knwoledge Hub, making the solutions and step-by-step guides readily accessible.
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    Starting Price: €39/month/user
  • 3
    Docsie

    Docsie

    Docsie

    Docsie is an award-winning digital documentation and knowledge management platform based in Ontario, Canada. You can access Docsie through a SaaS web application to create & edit documentation from any location. Then, you can publish content to a dynamic knowledge portal that users can access whenever they need information! Docsie offers powerful business-grade features to write & manage product documentation: - Docsie Pilot onboarding - Custom portal design & optional training for paid plans - Internal & external portal for employees & end-users - Workspaces - Knowledge base analytics & user feedback collection - Free custom domain - Markdown import & export - WYSIWYG Editor - iFrame embed - SwaggerAPI import - Snippet, fragment, document & topic templates - Help center & in-app help interface - Guided tour builder - Version & language management - Webhooks - AI translation & content generation - Project management - RBAC/JWT/SSO for security
    Starting Price: $39 per month (annual)
  • 4
    Tettra

    Tettra

    Tettra

    Tettra is an internal knowledge base with smart workflows to help you answer repetitive questions. Tettra helps you document important processes, policies, and procedures in one centralized place. This makes onboarding new teammates much faster and answering questions less repetitive. Most of our time is spent in cloud apps. As software continues to eat the world, the amount of information we create and the number of tools we use continues to rise. With all this information comes downsides. This fragmentation of tools and teams makes it tough to share context and agree on the best decisions, especially cross-functionally. On growing teams, your best employees shouldn't be bogged down by repetitive questions. To move fast, everyone needs access to the same information and principles. Your internal knowledge base will only be successful if everyone contributes to it. Tettra makes it easy for anyone to contribute knowledge by referencing content in other systems.
    Starting Price: $99 per month
  • 5
    Nuclino

    Nuclino

    Nuclino

    Nuclino works like a collective brain, helping teams bring all their knowledge, docs, and projects together in one place. It's a modern, simple, and blazingly fast way to collaborate, without the chaos of files and folders, context switching, or silos. Nuclino is trusted by over 12,000 teams and companies across the world.
    Starting Price: $5.00/month/user
  • 6
    Read the Docs

    Read the Docs

    Read the Docs

    Spend your time on writing high quality documentation, not on the tools to make your documentation work. Read the Docs simplifies software documentation by automating building, versioning, and hosting of your docs for you. We will host your documentation for free, forever. There are no tricks. We help over 100,000 open source projects share their docs, including a custom domain and theme. Whenever you push code to your favorite version control service, whether that is GitHub, BitBucket, or GitLab, we will automatically build your docs so your code and documentation are never out of sync. We build and host your docs for the web, but they are also viewable as PDFs, as single page HTML, and for eReaders. No additional configuration is required. We can host and build multiple versions of your docs so having a 1.0 version of your docs and a 2.0 version of your docs is as easy as having a separate branch or tag in your version control system.
    Starting Price: $5 per month
  • 7
    Bump.sh

    Bump.sh

    Bump.sh

    Bump.sh is the place for API developers to centralize all of their API documentation. Working with REST, Event-Drivent Architecture, or a mix of API technologies? Bump.sh is the only tool on the market that supports OpenAPI/Swagger, AsyncAPI, and soon more (such as GraphQL, SOAP, and gRPC). Plug Bump.sh into your CI, use our CLI, or upload your specification files manually, and benefit from a stunning UI that definitely contrasts with the legacy tools on the market. Enjoy all of the nifty UX details: we know devs will like it, as they were imagined by devs. Unique on the market: every time you publish a new version of your API documentation, Bump.sh automatically detects changes, publishes a changelog, and sends alerts to subscribe readers if the changes break anything.
    Starting Price: $149 per month
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