29 Open-Source Alternatives to Paid Software on GitHub
Paid subscriptions add up quickly, and for many everyday jobs there is a mature free alternative whose source code sits on GitHub. This guide lists 29 of them, from local AI models and coding agents to photo editors, video editors, office suites, automation platforms and self-hosted cloud tools. Each entry was checked against the project's own GitHub repository on October 25, 2026: the licence file, whether the repository is archived, and whether it has recent commits and releases.
"Free to download" is not the same as "free for every use". A few projects below use custom or source-available licences, and several keep optional paid cloud or enterprise tiers. We flag those in the table instead of rounding everything up to "open source". We list only legitimate projects and make no claim that any of them fully replaces its paid counterpart.
⚡ Quick facts
- Projects reviewed: 29 across 8 groups: local AI, AI coding, image and design, video and audio, office, notes and project management, automation, and self-hosted tools
- Licences: 26 use established open-source licences (MIT, Apache-2.0, GPL, AGPL, MPL). Three carry custom or source-available terms: Dify, n8n and Open WebUI
- Self-hosting: Included where it applies, mainly the AI platforms, automation tools and self-hosted cloud tools
- Checked: Repository, licence file, archive flag and recent activity were read on October 25, 2026. Licences and project terms change, so re-check before you rely on one
- Not included: Stale or archived projects, mirrors that are no longer developed, and anything with unclear terms
Comparison table: open-source alternatives to paid software
The "paid alternative" column names the commercial product people usually compare each project with. It is a guide to the job the tool does, not a promise of feature parity. Where a repository is a read-only mirror of a project developed elsewhere, the table says so.
| Tool | Paid alternative | What it does | GitHub repo | License | Best for | Important limitation |
|---|---|---|---|---|---|---|
| Ollama | Paid AI chatbot subscriptions and hosted model APIs | Runs open-weight language models on your own computer | ollama/ollama | MIT | Private, offline experiments with open models | Each model has its own licence, and your hardware limits model size |
| Open WebUI | Hosted chat interfaces | Self-hosted chat interface for local and API models | open-webui/open-webui | Custom (BSD-3-based, branding clause) | A ChatGPT-style front end for Ollama or other back ends | Not OSI open source: the licence restricts removing Open WebUI branding in larger deployments |
| AnythingLLM | Paid document-chat and AI workspace products | Chat with your documents using local or hosted models | Mintplex-Labs/anything-llm | MIT | Private knowledge bases on your own machine | Quality depends on the model and embedding setup you choose |
| LocalAI | Hosted AI model APIs | Self-hosted, OpenAI-compatible API server for local models | mudler/LocalAI | MIT | Developers who want a drop-in local API | Needs setup and capable hardware; model licences are separate |
| Dify | Hosted AI app and agent builders | Builds AI apps, agents and workflows with a visual editor | langgenius/dify | Modified Apache-2.0 (source-available) | Teams prototyping RAG apps and agent workflows | Running it as a multi-tenant service or removing its logo needs a commercial licence |
| OpenHands | Paid autonomous coding agents | AI software-development agent that edits code and runs commands | OpenHands/OpenHands | MIT | Delegating well-scoped coding tasks | It acts on your code, so run it in a sandbox; model API usage is billed separately |
| OpenCode | Paid AI coding assistants | Terminal-based AI coding agent | anomalyco/opencode | MIT | Terminal users who want a model-agnostic agent | You supply model access, which may cost money |
| Cline | Paid AI coding extensions | AI coding agent inside VS Code | cline/cline | Apache-2.0 | Agentic coding inside your existing editor | It bills through whichever model provider you connect |
| Continue | Paid AI code-completion subscriptions | Open-source AI assistant for VS Code and JetBrains | continuedev/continue | Apache-2.0 | Chat and autocomplete with your choice of model | Local models need hardware; hosted models cost money |
| GIMP | Adobe Photoshop | Raster image editing and retouching | GNOME/gimp (mirror) | GPL | Photo editing and graphics work | Different workflow from Photoshop; GitHub is a mirror of the GNOME project |
| Krita | Procreate, Photoshop for painting | Digital painting and illustration | KDE/krita (mirror) | GPL-3.0 | Artists, comics and concept art | Built for painting rather than photo editing |
| Penpot | Figma | Browser-based design and prototyping | penpot/penpot | MPL-2.0 | Design teams that want to self-host | Ecosystem and plug-ins are smaller than Figma's |
| darktable | Adobe Lightroom | RAW photo workflow and non-destructive editing | darktable-org/darktable | GPL-3.0 | Photographers who shoot RAW | Steeper learning curve than Lightroom |
| Blender | Maya, Cinema 4D | 3D modelling, animation, rendering and video editing | blender/blender (mirror) | GPL | 3D art, animation and visual effects | Large tool with a long learning curve; GitHub is a mirror of the Blender project |
| OBS Studio | Paid streaming and recording software | Screen recording and live streaming | obsproject/obs-studio | GPL-2.0 | Streamers, tutorial creators and meeting recordings | Powerful but configuration-heavy for beginners |
| Kdenlive | Adobe Premiere Pro, Final Cut | Multi-track video editor | KDE/kdenlive (mirror) | GPL-3.0 | YouTube-style editing on Windows, Linux and macOS | Fewer built-in templates and effects than paid editors |
| Shotcut | Paid consumer video editors | Cross-platform video editor | mltframework/shotcut | GPL-3.0 | Simple edits and format conversion | Interface takes time to learn |
| OpenShot | Paid consumer video editors | Beginner-friendly video editor | OpenShot/openshot-qt | GPL-3.0 | First-time video editors | Less suited to heavy professional projects |
| Audacity | Adobe Audition | Audio recording and editing | audacity/audacity | GPL-3.0 | Podcasts and voice recording | Audio-only; documentation is under a separate CC-BY licence |
| LibreOffice | Microsoft 365, Microsoft Office | Word processor, spreadsheet, presentations and more | LibreOffice/core (mirror) | MPL-2.0 (main code) | Offline office work and open document formats | Formatting can differ on complex Microsoft files; no built-in real-time cloud collaboration |
| Joplin | Evernote | Note-taking with Markdown and sync | laurent22/joplin | AGPL-3.0 (apps) | Privacy-minded note-taking | Joplin Server has a separate personal-use licence; paid Joplin Cloud exists |
| AppFlowy | Notion | Workspace for notes, docs and databases | AppFlowy-IO/AppFlowy | AGPL-3.0 | A self-hostable Notion-style workspace | Younger than Notion; a hosted AppFlowy cloud has its own plans |
| Logseq | Roam Research | Outliner and knowledge graph | logseq/logseq | AGPL-3.0 | Linked, local-first notes | Outliner style is not for everyone |
| Plane | Jira, Linear | Project and issue tracking | makeplane/plane | AGPL-3.0 | Small teams that want to self-host project tracking | Commercial editions and a hosted cloud exist alongside the community edition |
| n8n | Zapier, Make | Workflow automation with a visual editor | n8n-io/n8n | Sustainable Use License (fair-code) | Self-hosted automations for your own business | Not OSI open source: use is limited to internal business or personal purposes, and files marked .ee. need an enterprise licence |
| Activepieces | Zapier | No-code automation and AI workflows | activepieces/activepieces | MIT (core); enterprise code separate | Self-hosted no-code automation | Code under packages/ee/ carries a separate enterprise licence |
| Stirling-PDF | Adobe Acrobat Pro | Self-hosted PDF editing, merging, splitting and conversion | Stirling-Tools/Stirling-PDF | MIT (core); some paths proprietary | Quick PDF jobs without uploading files to a third party | Some directories, including app/proprietary/, carry separate proprietary licences |
| Immich | Google Photos, iCloud Photos | Self-hosted photo and video backup | immich-app/immich | AGPL-3.0 | Owning your photo library | You run and back up the server yourself, and pay for the storage |
| Nextcloud | Dropbox, Google Drive, Microsoft 365 | Self-hosted file sync, calendar, contacts and collaboration | nextcloud/server | AGPL-3.0 | Families and teams that want their own cloud | Needs server maintenance; an enterprise subscription is sold separately |
AI assistants and local LLM tools
Running a model locally keeps prompts on your machine and removes per-message fees, but the weights, a capable GPU or enough RAM, and your electricity are still real costs.
- Ollama is the simplest way to download and run open-weight models from the command line. It is MIT-licensed; each model you pull carries its own licence, so check it before commercial use.
- Open WebUI gives Ollama or any OpenAI-compatible API a polished chat interface. Its licence is a BSD-3-based custom licence with a branding clause, which is why we do not call it OSI open source.
- AnythingLLM adds document upload and retrieval on top of a model of your choice, which suits private knowledge bases.
- LocalAI exposes local models through an OpenAI-compatible API, so existing code can point at your own server.
- Dify lets you build agents and retrieval workflows visually. Its licence is Apache-2.0 plus extra conditions on multi-tenant hosting and logo changes, so it is source-available rather than OSI open source.
AI coding and developer tools
These tools replace the editor or agent layer of a paid coding assistant. The model behind them is a separate choice, and a hosted model usually bills per token. For the commercial side of the market, see our guides to GitHub Copilot and the Cursor AI code editor.
- OpenHands is an agent that can edit code, run commands and browse. It is MIT-licensed; run it in an isolated environment because it acts on your files.
- OpenCode is a terminal-first coding agent that works with many model providers.
- Cline brings an agent into VS Code and asks before it edits files or runs commands.
- Continue offers chat and autocomplete in VS Code and JetBrains, with local or hosted models.
Image and design tools
- GIMP covers photo retouching and general raster editing. Its source is developed on GNOME's servers, with the GitHub repository acting as a mirror.
- Krita is aimed at painting and illustration, with brush engines that artists favour.
- Penpot is a browser-based design and prototyping tool you can self-host, the closest open-source match to Figma's workflow.
- darktable handles RAW development and non-destructive photo editing, similar in purpose to Lightroom.
- Blender is a full 3D suite for modelling, animation, rendering and even video editing.
Video and audio tools
- OBS Studio records your screen and streams live. It is the standard free choice for tutorials and streaming.
- Kdenlive, Shotcut and OpenShot are three cross-platform video editors. OpenShot is the gentlest start, Kdenlive suits multi-track projects, and Shotcut sits between them.
- Audacity records and edits audio, which is enough for most podcast and voice work.
Office and productivity
LibreOffice is the established free office suite: word processor, spreadsheet, presentations, drawing and database tools. Complex Microsoft files can lay out differently, so open important documents in LibreOffice before you cancel a subscription. The GitHub repository is a mirror of the project.
Notes, project management and knowledge tools
- Joplin syncs Markdown notes across devices. The apps are AGPL-3.0, but Joplin Server has its own personal-use licence, so read it before running it for others.
- AppFlowy is a Notion-style workspace for docs and databases that you can self-host.
- Logseq is an outliner that links notes into a knowledge graph and stores them locally.
- Plane tracks issues, cycles and projects, as an alternative to Jira or Linear. Its community edition is AGPL-3.0; commercial editions and a hosted cloud exist.
Automation tools
n8n and Activepieces connect apps and AI steps into workflows. n8n is fair-code under the Sustainable Use License, which allows use for your own internal business or personal purposes but is not an OSI-approved open-source licence. Activepieces is MIT-licensed except its enterprise directories. If you plan to resell automations or host them for clients, read the licence text first.
Additional self-hosted tools
- Stirling-PDF edits, merges, splits and converts PDFs on your own server, so documents need not leave your network.
- Immich backs up photos and videos from your phone to a server you control. Treat it as a project under active development and keep an independent backup.
- Nextcloud provides file sync, calendars, contacts and collaboration on your own server.
Installation and safety guidance
Open source lowers the cost of software, not the risk of running it. Before you install anything from GitHub:
- Download from the project's own website or its official GitHub Releases page, not from search ads, forks or re-uploads. Fake lookalike repositories exist.
- Read the install commands in the README before you run them. Do not paste a
curl | bashline you have not read, and prefer your system package manager or the official installer where one exists. - Check the repository: its owner, whether it is archived, the date of the latest release, and open security advisories.
- Verify checksums or signatures when the project publishes them.
- Run unfamiliar tools in a virtual machine or container first. This matters most for AI agents that can run commands.
- For self-hosted servers, keep them updated, use strong unique passwords, avoid exposing them to the internet without authentication or a VPN, and keep backups.
- Never use cracked or pirated builds of paid software. They are illegal and a common way to catch malware.
A budget workflow for AI work
You can assemble a capable AI workflow from the tools above: Ollama to run a model, Open WebUI or AnythingLLM for chat and documents, and Continue or Cline in your editor. Be clear about what stays free. The software is free; the model weights have their own licences and some restrict commercial use; a GPU or a lot of RAM is a real hardware cost; and any hosted model API bills separately. A small local model is often enough for drafting and code explanation, while harder tasks may still call for a paid model. Our list of free AI tools covers hosted options that cost nothing to start, and Lovable's app builder shows what the paid side offers.
What we left out
We left out GPT4All (no repository activity since May 2025), the Inkscape GitHub repository (a stale mirror, since development moved to GitLab), Aider (the repository is not archived, but its latest release was in February 2026), and Bitwarden (its licensing is split across components and needs a longer explanation than this list allows). This is a judgement about the evidence on the day we checked, not a statement that those projects are bad.
Frequently asked questions
Are all GitHub projects free?
No. GitHub hosts open-source, source-available and fully proprietary code. Some repositories are public but restrict commercial use, and several projects keep paid cloud or enterprise editions. Always read the licence file.
Does open source mean commercial use is allowed?
Usually, but not always. Licences such as MIT and Apache-2.0 allow commercial use with conditions. Copyleft licences such as GPL and AGPL allow it but require you to share source changes in some cases. Source-available licences such as n8n's and Dify's add limits.
Can these tools replace paid software completely?
Sometimes, but not always. Many cover everyday needs well. Paid products may still win on polish, integrations, support, file-format fidelity or real-time collaboration, so test a free tool on a real project before you cancel anything.
Is self-hosting always free?
No. The software may cost nothing, but you pay for a server or hardware, storage, bandwidth, backups, your time and security upkeep. For some teams a paid hosted plan is cheaper overall.
How can users check a project's license?
Open the repository and read the LICENSE or COPYING file. GitHub also shows a licence label on the repository page, though it can read "Other" for custom licences. Check subfolders too, since some projects license parts of the code differently.
Are local AI tools always private?
Not automatically. A fully local model keeps prompts on your machine, but many tools can also call hosted APIs, collect telemetry or sync data. Check the settings and network behaviour of each tool.
Can businesses use them legally?
Often yes, but it depends on the licence and how you use the software. Internal use is usually simple; selling, redistributing or hosting a tool for customers can trigger extra conditions. For business use, read the licence and ask a lawyer about anything unclear.
Conclusion
Free and open-source software can cut real costs, especially for editing, documents, notes and automation. The sensible approach is to pick one paid tool you rarely use to its full extent, test the open-source alternative on a real task, and keep the paid version until the free one proves itself. Check each licence, install from official sources, and keep backups. Want more tools worth trying? Browse our latest guides and subscribe to the newsletter for new picks.
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