Collabora Online: An Open Source Office Suite Alternative

Collabora Online is an open source office suite alternative that's gained popularity in recent years. It's a cloud-based solution that allows users to create, edit, and share documents online.

Collabora Online is built on top of the LibreOffice technology, which is a well-established and widely used open source office suite. This means that users can expect a familiar interface and compatibility with existing LibreOffice files.

One of the key benefits of Collabora Online is that it's highly customizable, allowing users to tailor the interface and features to their specific needs. This is particularly useful for organizations that need to integrate Collabora Online with their existing infrastructure.

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Collabora Online integrates into an existing infrastructure and requires a cloud solution as a foundation, such as EGroupware, Nextcloud, ownCloud, or Pydio.

You can also use a supported appliance for Collabora Online built on Univention Corporate Server (UCS), a Debian-based enterprise Linux distribution with an integrated identity and infrastructure management system.

If you don't want to install Collabora Online yourself, there are partners who offer Collabora Online as a SaaS solution, making it easy to get started without the hassle of installation and maintenance.

Collabora Online is not a stand-alone software, but rather an online office suite that integrates into an existing infrastructure.

You'll need a cloud solution as a foundation, such as EGroupware, Nextcloud, ownCloud, or Pydio, to get started.

Alternatively, you can use a supported appliance built on Univention Corporate Server (UCS), a Debian-based enterprise Linux distribution with an integrated identity and infrastructure management system.

The Univention App Center offers two appliances, one with Nextcloud and one with ownCloud as the base.

If you're not tech-savvy, don't worry – there are hosting partners who offer Collabora Online as a SaaS solution.

To control your office suite the open source way, you'll need to install and set up the cloud office on a dedicated server with another cloud solution as a foundation.

This requires a little more effort than setting up an account with Google or Microsoft, but the data is stored on your own server or in a private cloud if you opt for a SaaS solution.

EGroupware is another option for an open source groupware solution that runs in your favorite web browser.

Before you begin, check out the online demo to give Collabora Online a try.

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Getting started with online document collaboration can be a game-changer for your productivity.

Collabora Online offers a secure way to work together with others, giving you full control over who can view, edit, or comment on your documents.

Collabora Online is a web-based office suite that allows you to create, edit, and share documents online, no matter where you are.

You can access your documents from anywhere, as long as you have a stable internet connection.

Collabora Online is designed to be user-friendly, so you can quickly get started without needing to learn complicated software.

This means you can collaborate with others in real-time, making it easier to work together and achieve your goals.

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To use Collabora Online, you'll need a host that can run a Docker container. This is a straightforward requirement that's easily met by most modern servers.

You'll also need a subdomain or a second domain that the Collabora Online server can run on. This is necessary for the service to function properly.

A valid SSL certificate for the domain that Collabora Online should run on is also required. This ensures a secure connection between your server and the Collabora Online service.

You'll also need a valid SSL certificate for your Nextcloud installation. This is another important security measure that keeps your data safe.

Here are the specific dependencies required to install Collabora Online:

Collabora Online can be accessed from modern web browsers without the need for plug-ins or add-ons.

The suite supports real-time collaborative editing of word processing documents, spreadsheets, presentations, and vector graphics.

Collaboration features include commenting, version tracking with document comparison and restoration, and integration with communication tools such as chat or video calls.

Optional applications are available for offline use on various platforms, including Android, ChromeOS, iOS, iPadOS, Linux distributions, macOS, and Windows.

These mobile apps share the same LibreOffice-based core as the server version, ensuring document compatibility across platforms.

Collabora Online supports a wide range of file formats, including OpenDocument formats (ODF), Microsoft Office formats, and PDF.

The suite can import formats supported by LibreOffice, such as Microsoft Visio and Publisher files, as well as legacy formats used by Lotus 1-2-3, Microsoft Works, and Quattro Pro.

Collabora Online operates on the principle that documents remain on the server, with users viewing tile-rendered images of the document and sending their edits back to the server.

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Collabora Online can be used in any modern web browser without the need for plug-ins or add-ons.

It includes a word processor, a spreadsheet, and presentation software, making it a comprehensive cloud office solution.

The cloud office also features an application for creating vector graphics, which is a unique offering not found in Google or Microsoft's cloud offices.

Collabora Online supports the Open Document Format (ODF) and various Microsoft Office formats, including DOC/DOCX, XLS/XLSX, and PPT/PPTX.

It can open and process Microsoft Office files, just like LibreOffice, and supports older standards and exotic file formats.

Exchanging documents with other users is possible, but it requires knowledge of style sheets and the difference between tabs and spaces.

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To install and run Collabora Online, you'll need a few key things.

A host that can run a Docker container is a must-have, as it will be the foundation for your setup.

A subdomain or a second domain is also required, so make sure you have one available.

Apache server with some enabled modules is another essential component, although NGINX instructions are also available if you prefer that option.

Valid SSL certificates are necessary for both the domain that Collabora Online will run on and your Nextcloud server.

Note that self-signed certificates are not covered in this guide, so you'll need to explore other options if you're using one.

Here's a quick rundown of the required dependencies:

Digital sovereignty is a pressing concern, especially in Europe, where the reliance on US-based "big tech" companies has raised concerns about data privacy.

Collabora Online's open-source design and support for self-hosting have made it notable in discussions about digital sovereignty. This allows users and organizations to control their own data.

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On June 10th, 2025, Microsoft executives admitted under oath in the French Senate that they cannot guarantee data sovereignty. They would be compelled to pass French and European Union information to the US administration if requested via a warrant or subpoena.

The Cloud Act is a law that gives the US government authority to obtain digital data held by US-based tech corporations, regardless of where the data is stored. This highlights the risks associated with relying on major technology companies.

Several European government agencies have adopted private cloud solutions using Collabora Online and related platforms to maintain control over sensitive information.

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Collabora Online allows users to access their office documents within the ownCloud web front and author new content in real-time. This means users can see changes as others make them, eliminating the frustration of version conflicts.

Collaborative editing is a key feature of Collabora Online, enabling multiple users to work on the same document simultaneously. This is particularly useful for teams working on large projects.

With Collabora Online, users can view and edit documents, spreadsheets, presentations, and diagrams, all while preserving the layout and formatting of the original document.

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Collabora Online offers two main user interfaces: the Tabbed view and the Compact view. The Tabbed view is a more modern interface designed to provide easy access to all features.

Users can choose their preferred look and feel via the View menu in current Collabora versions. This is a big change from previous versions, where administrators had to edit the server-side settings by hand.

The Tabbed view is especially helpful for Microsoft Office users who are getting used to the Collabora Online interface. It's designed to make it easier for them to navigate and find what they need.

In contrast, the Compact view is a more minimalistic interface that may appeal to users who prefer a simpler look and feel. However, users can still choose to switch to the Tabbed view if they prefer.

EGroupware offers a different approach to customizing the toolbar, allowing users to modify it individually. This is a nice touch, as it gives users more control over their interface.

Users can choose their preferred interface in the personal settings, section File manager, tab Collabora Online. From there, they can select Standard Toolbar from the drop-down menu and click Apply.

Finding the right partner can make all the difference in your collaboration and integration journey.

Collabora Online offers a list of global partners who integrate and host the platform, providing a ready-to-go solution.

These partners have been vetted and trusted by Collabora Online, ensuring a smooth and secure experience for your organization.

You can browse through the list of partners to find the one that best fits your needs and goals.

By integrating with a partner, you can take advantage of their expertise and resources, saving you time and effort in the process.

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You can integrate Collabora Online with ownCloud in several ways. First, you can use the Collabora Online connector for ownCloud, which involves installing Collabora (Docker) and the Collabora integration app for ownCloud (manual installation by the administrator).

To set up the integration, install Collabora (Docker) and the Collabora integration app for ownCloud. You can also use the Univention App-Center ownCloud x Collabora Online connector, but be aware that you need valid subscriptions for productive usage.

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To configure the app in ownCloud, go to the Apps section and choose "Office & text", then install the "Collabora Online app". Specify the server you have set up before, such as "https://office.nextcloud.com".

Here are the steps to set up the integration:

By following these steps, you can integrate Collabora Online with ownCloud and take advantage of collaborative editing, file revision history, and other features.

You can control your office suite the open source way, which is a great option for those who value digital sovereignty and want to retain complete control of their data.

There are no major differences between the cloud offices of the big players—at least for end users. All basic functions work fine, and there are no complaints about importing and exporting documents and dealing with different office formats.

Installing and setting up the cloud office on a dedicated server with another cloud solution as a foundation might be a challenge. You must take care of the installation and maintenance yourself.

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You can consider a SaaS solution that stores data in a private cloud if you opt for it. This way, you can still have control over your data.

EGroupware is an open source groupware solution that runs in your favorite web browser, making it a great alternative to Microsoft 365.

To install Collabora Online, you can choose from several options. Install the Collabora Online server, and it will listen on "localhost:9980".

Configuring the server is the next step. You'll need to set up an Apache reverse proxy to connect to the server.

You can also configure the app in Nextcloud, which is a user-friendly option. Go to the Apps section and choose "Office & text", then install the "Collabora Online app".

To specify the server, go to Admin -> Collabora Online and enter the server URL, such as "https://office.nextcloud.com".

Alternatively, you can use Docker to set up Collabora Online. The collabora/code Docker image is fully configurable and can be installed on any x86-64 host.

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To set up Docker, download the Collabora Online docker and replace "cloud.nextcloud.com" with your own Nextcloud host. Make sure to escape all dots with double backslashes.

Using Docker, you can also select the dictionaries you want to use with Collabora Online, such as German, English, Italian, French, and Spanish.

If you prefer not to use Docker, you can use native Linux packages from Collabora. They provide packages for selected Linux distributions, such as Debian 8, Debian 9, Ubuntu 16.04, and CentOS 7.

On a recent Ubuntu or Debian, you can install Collabora Online using a simple command.

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Collabora Online is a robust collaboration tool that offers a range of features to help teams work together effectively. Its version history can be accessed through various integrations, such as EGroupware, where you need to open a document and select File/See history, or through the file manager in Nextcloud and ownCloud.

Collabora Online's Review menu is a powerhouse of collaboration features, including a spellchecker, thesaurus, commenting, recording, and managing changes. Users can even see changes appear in near real-time when editing documents collaboratively.

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One of the standout features of Collabora Online is its commenting system, which allows users to mark words, lines, and entire sections, leave and reply to comments, and even mark threads as resolved and unresolved. It's a breeze to use and works seamlessly.

Sharing documents with others is also a straightforward process in Collabora Online. In integrations like Nextcloud and ownCloud, you can share documents via the file manager and sharing icon, while in EGroupware, you can right-click a document and select the Share/Writable Collabora Online link.

Here's a quick rundown of how Collabora Online compares to other popular collaboration tools:

You should still develop your changes against the master branch, even if you're working on mobile-only features. This ensures your changes are merged into the master branch, where they'll be moved into the distro/collabora/co-25.04 branch according to the release schedule.

Changes made in the distro/collabora/co-25.04 branch are then regularly cherry-picked into the distro/collabora/co-25.04-mobile branch.

If you want your changes to get into mobile snapshots or releases more quickly, make a backport pull request against the distro/collabora/co-25.04-mobile branch once your changes are merged into the master branch.

Developing for mobile updates can be a bit tricky, but it's actually pretty straightforward. You should still develop against the master branch, even if you're working on mobile-only features.

Changes made in master will be moved into the distro/collabora/co-25.04 branch according to the release schedule. This means you don't need to worry about manually updating your mobile branch.

If you have a change that you want to get into mobile snapshots or releases more quickly, you should still develop it against master. This ensures that your change is stable and tested.

When your change is merged into master, you should make a backport pull request against distro/collabora/co-25.04-mobile. Don't make pull requests directly against distro/collabora/co-25.04-mobile, as this can cause confusion and delays.

Mobile office access is a game-changer for productivity on-the-go. Mobile apps available for Android and iOS allow you to edit documents on your smartphone or tablet and even work offline.

The mobile apps work fine with all basic functions, but there's still room for improvement in formatting documents.

Mobile access is more convenient when done in the web browser of mobile devices, thanks to responsive layouts that adapt well to different screen sizes.

Collaborative and simultaneous editing of documents in Collabora Online runs smoothly, making it a great feature for teamwork.

Collabora Online's architecture is designed to be flexible and adaptable to various organizational needs. The server component can be self-hosted or deployed through third-party enterprise open-source cloud platforms.

This allows organizations to maintain control over their data and infrastructure. For example, it's available for various Linux distributions and as a Docker image.

The server enables features such as in-browser document editing, file synchronization, and real-time communication.

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Architecture plays a crucial role in server design, as it determines how hardware components interact with each other and with software.

A well-designed architecture can improve server performance, scalability, and reliability. The architecture of a server typically involves a combination of hardware and software components, including the CPU, memory, storage, and network interfaces.

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The CPU is the brain of the server, responsible for executing instructions and handling tasks. In a typical server architecture, multiple CPU cores are used to improve performance and multitasking capabilities.

Server architecture often involves the use of a hypervisor, which allows multiple virtual machines to run on a single physical server. This increases server utilization and reduces the need for multiple physical servers.

A good server architecture should also take into account power management and cooling systems, as these can significantly impact server performance and lifespan.

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The server component of Collabora Online can be self-hosted, allowing organizations to maintain control over their data and infrastructure.

It's available for various Linux distributions and as a Docker image, making it a flexible option for deployment.

Collabora Online can be integrated with third-party cloud platforms that offer additional functionality, such as file sharing, calendars, and email.

These platforms typically include services like Dropbox, Google Workspace, and Microsoft 365, making it easy to find a solution that fits your needs.

To get started, you'll need to install the Collabora Online server, which will listen on "localhost:9980" once set up.

Configuring the locally installed Apache reverse proxy is the next step, which will allow you to access the server from outside your local machine.

You can test Collabora Online with integration by setting up Nextcloud or ownCloud on localhost and installing the richdocuments app.

Good tutorials exist for installing ownCloud or Nextcloud, so we won't repeat them here.

To test with Nextcloud or ownCloud, go to Collabora Online settings and set the WOPI URL to http://localhost:9980.

If SSL is enabled in either Online or the integration, both must have SSL enabled.

You must access NC/OC using https:// as well as configure the Collabora Online endpoint in NC/OC as https://localhost:9980.

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