What Calligra does

Calligra is an open-source office and graphics suite developed and maintained by the volunteer KDE community under the governance of KDE e.V., a German-registered non-profit. Successor to the KOffice project, Calligra was launched in December 2010 and provides a horizontal suite of desktop productivity applications covering word processing (Words), spreadsheets (Sheets), presentations (Stage), vector graphics (Karbon), visual database creation (KEXI), and project management (Plan). The suite is built on the Qt6 and KF6 frameworks, supports Linux, Windows, and macOS, and offers mobile and touch-optimized interfaces via Gemini, Calligra Active, and Calligra Mobile. Native ODF handling with Microsoft Office compatibility is positioned as a core interoperability feature, and the underlying Calligra Office Engine has been licensed to Nokia for the Harmattan Office application on the N9 smartphone.

The suite is distributed free of charge via Linux distribution package managers (apt, dnf, pacman, zypper, Portage, FreeBSD ports), Flatpak on Flathub, source code through KDE Invent, and Windows binaries packaged by KO GmbH. There are no pricing tiers, subscription fees, or paid product offerings — the firm's revenue model is donation-funded via KDE e.V. rather than commercial sales. Customer segments are horizontal, reaching students and academic users (footnotes/citation support), general desktop users seeking free proprietary alternatives, and touch/mobile device users. Multiple previous components (Krita, Author, Braindump, Flow) have been spun off or discontinued, with product focus consolidating around four core components in the August 2024 Calligra 4.0 release, which fully migrated to Qt6 and KF6.

Name

Calligra

Legal name

KDE e.V.

Website

https://calligra.org

Company type

Private

Founded year

2010

Operating status

Operating

Headcount range

11–50 employees

Short description

Calligra is the KDE community's open-source office and graphics suite providing word processing (Words), spreadsheets (Sheets), presentations (Stage), vector graphics (Karbon), database creation (KEXI), and project management (Plan) software, distributed free of charge to Linux, Windows, and mobile users via package managers and Flatpak under the KDE e.V. non-profit umbrella.

Ownership category

akta.pro rank

Headquarters

HQ city

Berlin

HQ country

Germany

HQ region

Europe

Markets served

GTM type

B2C

Offering type

Software

Cost components

Personnel, Technology or R&D, Operations

Revenue model

1. Free/Open Source Distribution: Calligra Suite is completely free software. No revenue is generated from software sales. The project operates as a community open-source initiative under the KDE umbrella, supported by donations to KDE e.V.

Go-to-market motion1 record

Distribution channels4 records

Marketing channels5 records

Core offering

Calligra is an open-source office and graphics suite developed by the KDE community. It bundles desktop applications for word processing (Words), spreadsheets (Sheets), presentations (Stage), vector graphics (Karbon), visual database creation (KEXI), and project management (Plan). The suite is distributed for free across Linux distributions, Windows, and mobile platforms, built on Qt6/KF6 frameworks and using Open Document Format as its native file format.

Product overview

Calligra is an open-source office and graphics suite developed by the KDE community. It is a collection of desktop productivity applications that evolved from the KOffice project. The suite includes word processing (Words), spreadsheet (Sheets), presentation (Stage), vector graphics (Karbon), database creation (Kexi), and project management (Plan). Some older components like Braindump, Author, Flow, and Krita are now either standalone applications or unmaintained. Calligra 4.0, released in August 2024, represents the latest major version with full Qt6 and KF6 transition.

Differentiator

Problem solved

Functional benefit

Brands

• Calligra Words: Word processor application with desktop publishing features
• Calligra Sheets
• Calligra Stage
• Karbon
• KEXI
• Calligra Plan
• Calligra Gemini
• Calligra Author
• Braindump
• Flow
• Calligra Active
• Calligra Mobile

Products and services

• Calligra Words Intuitive word processor with desktop publishing features for creating documents with images, charts, and tables via drag-and-drop.
• Calligra Stage Presentation application for creating slideshows with images, videos, animations, transitions, multiple master slides, and presenter notes.
• Calligra Sheets Fully-featured spreadsheet application supporting formulas, charts, pivot tables, and business templates for data organization and calculations.
• Karbon Vector drawing application with customizable interface for creating clipart, logos, illustrations, and photorealistic vector images. Supports SVG, ODG, WPG, WMF, EPS/PS import and ODG, SVG, PNG, PDF, WMF export.
• KEXI Visual database applications creator for designing databases, inserting/editing data, performing queries, and processing data via forms. Positioned as open-source alternative to Microsoft Access, FileMaker, and Oracle Forms.
• Calligra Plan Project management application for managing moderately large projects with task dependencies, timing constraints, resource scheduling, task progress monitoring, Gantt charts, and earned value analysis.
• Calligra Suite The overarching office and graphics suite integrating all Calligra applications (Words, Stage, Sheets, Karbon, Kexi, Plan) under one umbrella, developed by KDE as the successor to KOffice.
• Calligra Gemini Office suite interface designed specifically for 2-in-1 devices (laptops with touchscreens that double as tablets), offering both touch and desktop user experiences.
• Calligra Office Engine Underlying engine technology enabling developers to create new user experiences, target new platforms, and build specialized office application versions.

Named customers1 record

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration2 records

Feature8 records

Partnerships

Two partnerships are on record, tiered core.

• KO GmbHcoreChannel Partner/ Reseller/ Distributor · 21 December 2011KO GmbH provides Windows binaries of Calligra Suite. Released first experimental Windows version in December 2011. KO GmbH is an expert consulting company around office document applications and the Open Document Format, incorporated in Germany with developers across Europe and the US.
• NokiacoreOEM/ Whitelabel/ Licensing Partner · 24 October 2011Nokia used the Calligra Office Engine for the Harmattan Office application bundled with the N9 smartphone. Nokia developed Harmattan Office together with the Calligra community and KO GmbH. Thorsten Zachmann from Nokia presented at Free Desktop Summit about this partnership.

Scale indicators2 records

Recent moves8 records

Expansion highlights4 records

Direct peers

• LibreOffice: The leading open-source office suite, forked from OpenOffice.org. Directly competes with Calligra for the same Linux/open-source desktop productivity user base and ships a comparable set of word, spreadsheet, and presentation applications.
• Apache OpenOffice: Another open-source office suite descended from the original OpenOffice codebase. Competes with Calligra for open-source office users, though with a notably slower release cadence and smaller community.

Broad incumbents

• SoftMaker Office: Commercial cross-platform office suite offering a paid alternative to Microsoft Office. Competes with Calligra on Linux/Windows productivity, particularly among users willing to pay for a polished native experience.
• WPS Office (Kingsoft): Large, well-funded cross-platform office suite with freemium and enterprise tiers. Competes with Calligra for productivity users, particularly those seeking Microsoft Office compatibility on Linux.
• Google Workspace: Cloud-native productivity suite from Google. Competes for the same end-user productivity workload as Calligra, with a fundamentally different (cloud, collaborative) delivery model.
• Microsoft 365 / Office: Dominant commercial office productivity suite. Sets the compatibility benchmark (file formats, features) that all open-source alternatives, including Calligra, must chase.

Emerging players

• OnlyOffice: Open-source office and productivity suite with strong collaboration features and a dual desktop/cloud offering. Competes with Calligra in open-source productivity but emphasizes real-time co-editing and SaaS deployment.
• Collabora Online / Collabora Office: Commercial enterprise offering built on LibreOffice technology. Competes for the same open-source desktop and enterprise deployment market that Calligra targets, with a stronger commercial/government go-to-market.
• Zoho Office Suite: Integrated online/offline office productivity offering within Zoho's broader business app ecosystem. Overlaps with Calligra's office productivity category and competes for SMB and individual users.

Others

• Nextcloud (with Collabora/OnlyOffice integrations): Open-source collaboration platform that integrates office document editing (via Collabora or OnlyOffice). Represents an adjacent, ecosystem-level competitor for self-hosted productivity deployments that Calligra could otherwise serve.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/calligrasuite
• Facebookfacebook.com/calligra

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Calligra