# Emacs vs Theia

**Leader by vioscaleAI score:** Theia

| Attribute | Emacs | Theia |
|---|---|---|
| **vioscaleAI score** | 39.2 (53% (medium)) | 62.6 (64% (medium)) |
| activity.commits_last_30d | 100 | 94 |
| adoption.dependent_repos | 0 | 324 |
| adoption.github_stars | 5,218 | 21,710 |
| content.faq | `[{"answer":"A free and open-source text editor built on a Lisp interpreter that enables extensive customization through Lisp code. It combines core text editing with broader functionality including project planning, email and news reading, debugging, calendar, and IRC capabilities. It is indexed under IDEs & Code Editors.","source":"https://www.gnu.org/software/emacs/","question":"What is Emacs?","confidence":0.6},{"answer":"Emacs is open source, so it can be self-hosted and used at no licence cost. It is released under the GPL-3.0 licence. Pricing changes often, so verify at source before relying on it.","source":"https://www.gnu.org/software/emacs/","question":"Is Emacs free to use?","confidence":0.6},{"answer":"Emacs supports Windows, macOS, Linux, Android and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://www.gnu.org/software/emacs/","question":"What platforms does Emacs support?","confidence":0.6},{"answer":"Yes. Emacs can be deployed self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://www.gnu.org/software/emacs/","question":"Can Emacs be self-hosted?","confidence":0.6},{"answer":"Yes. Emacs is published under the GPL-3.0 licence, a copyleft licence, so check its terms before embedding it in a closed-source product. Licence terms can change between releases, so verify against the repository for the version you intend to use.","source":"https://github.com/emacs-mirror/emacs","question":"Is Emacs open source?","confidence":0.95}]` | `[{"answer":"A development tool combining open-source principles with artificial intelligence features, available for cloud and desktop use. It emphasizes user privacy, supports many programming languages, and works with thousands of existing development tools. It is indexed under IDEs & Code Editors.","source":"https://theia-ide.org","question":"What is Theia?","confidence":0.6},{"answer":"Theia is open source, so it can be self-hosted and used at no licence cost. It is released under the EPL-2.0 licence. Pricing changes often, so verify at source before relying on it.","source":"https://theia-ide.org","question":"Is Theia free to use?","confidence":0.6},{"answer":"We have confirmed browser-based access to Theia. That is the extent of what we could verify from public sources, so it may well offer desktop or mobile clients we have not indexed.","source":"https://theia-ide.org","question":"What platforms does Theia support?","confidence":0.6},{"answer":"Yes. Theia can be deployed cloud / SaaS and self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://theia-ide.org","question":"Can Theia be self-hosted?","confidence":0.6},{"answer":"We have confirmed 9 integrations for Theia, including Python, Java, C++, Go, YAML, ESLint, NPM and GitHub Pull Requests, plus 1 more. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://theia-ide.org","question":"What does Theia integrate with?","confidence":0.6},{"answer":"Yes. Theia is published under the EPL-2.0 licence, a copyleft licence, so check its terms before embedding it in a closed-source product. Licence terms can change between releases, so verify against the repository for the version you intend to use.","source":"https://github.com/eclipse-theia/theia","question":"Is Theia open source?","confidence":0.95}]` |
| deployment.options | `{"self_hosted":true}` | `{"cloud":true,"self_hosted":true}` |
| description.long | An open-source text editor written in C and Lisp that emphasizes extensibility and customization through programming, with support for multiple platforms and international character input methods. | Theia IDE is an extensible, multi-language development environment for both cloud and desktop deployment. It combines integrated AI assistance with privacy-preserving architecture where users maintain full control over their code, data, and AI model choices. |
| features.capabilities | `{"type":"terminal_editor","lsp_dap":true,"builtin_ai":"none","deployment":"desktop","os_support":"GNU/Linux, Windows, macOS, BSD, Haiku, Android","remote_dev":false,"open_source":"oss","base_platform":"original","extensibility":"plugins","pricing_model":"free","language_scope":"polyglot","git_integration":false,"code_intelligence":"lsp_grade","integrated_debugger":true}` | `{"type":"full_ide","lsp_dap":true,"builtin_ai":"native","deployment":"both","os_support":"Cross-platform (browser and desktop via Electron)","open_source":"oss","base_platform":"original","extensibility":"marketplace","pricing_model":"free","language_scope":"polyglot","code_intelligence":"lsp_grade"}` |
| integrations.count | 2 | 3,000 |
| integrations.list | `[{"name":"Tree-Sitter"},{"name":"EditorConfig"}]` | `[{"name":"Python"},{"name":"Java"},{"name":"C++"},{"name":"JavaScript"},{"name":"Go"},{"name":"YAML"},{"name":"Docker"},{"name":"ESLint"},{"name":"NPM"},{"name":"GitHub Pull Requests"},{"name":"GitLens"},{"name":"GitHub","native":true,"category":"vcs","direction":"bidirectional"},{"name":"GitHub Copilot","native":true,"category":"ai","direction":"inbound"},{"name":"OpenAI","category":"ai","direction":"inbound"},{"name":"Anthropic","category":"ai","direction":"inbound"},{"name":"Google","category":"ai","direction":"inbound"},{"name":"Ollama","category":"ai","direction":"inbound"},{"name":"Mistral","category":"ai","direction":"inbound"},{"name":"HuggingFace","category":"ai","direction":"inbound"},{"name":"Claude Code","native":true,"category":"ai","direction":"inbound"},{"name":"VS Code Extensions","category":"ide_extensions","direction":"inbound"}]` |
| language.primary | Emacs Lisp | TypeScript |
| license.spdx | GPL-3.0 | EPL-2.0 |
| platform.support | `{"cli":true,"mac":true,"linux":true,"android":true,"windows":true}` | `{"mac":true,"web":true,"linux":true,"windows":true}` |
| pricing | `{"type":"open_source","summary":"Free and open source","freeTier":true,"sourceUrl":"https://www.gnu.org/software/emacs/","retrievedAt":"2026-10-13T13:45:48.009Z"}` | `{"type":"free","freeTier":true,"sourceUrl":"https://theia-ide.org","retrievedAt":"2026-10-14T21:35:08.250Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | open_source | free |
| pricing.price_level | free | free |
| pricing.transparent | yes | yes |
| release.cadence_days | - | 12 |
| release.history | - | `[{"url":"https://github.com/eclipse-theia/theia/releases/tag/next","date":"2026-10-14T00:38:12Z","type":"prerelease","version":"next"},{"url":"https://github.com/eclipse-theia/theia/releases/tag/v1.74.2","date":"2026-09-30T13:06:55Z","type":"stable","version":"v1.74.2"},{"url":"https://github.com/eclipse-theia/theia/releases/tag/v1.76.0","date":"2026-09-24T14:38:20Z","type":"stable","version":"v1.76.0"},{"url":"https://github.com/eclipse-theia/theia/releases/tag/v1.75.0","date":"2026-08-27T14:59:12Z","type":"stable","version":"v1.75.0"},{"url":"https://github.com/eclipse-theia/theia/releases/tag/v1.74.1","date":"2026-08-06T15:44:57Z","type":"stable","version":"v1.74.1"},{"url":"https://github.com/eclipse-theia/theia/releases/tag/v1.74.0","date":"2026-07-31T11:53:39Z","type":"stable","version":"v1.74.0"},{"url":"https://github.com/eclipse-theia/theia/releases/tag/v1.73.1","date":"2026-07-01T12:46:12Z","type":"stable","version":"v1.73.1"},{"url":"https://github.com/eclipse-theia/theia/releases/tag/v1.73.0","date":"2026-06-25T13:02:04Z","type":"stable","version":"v1.73.0"},{"url":"https://github.com/eclipse-theia/theia/releases/tag/v1.72.3","date":"2026-06-10T08:44:10Z","type":"stable","version":"v1.72.3"},{"url":"https://github.com/eclipse-theia/theia/releases/tag/v1.72.2","date":"2026-06-05T14:19:07Z","type":"stable","version":"v1.72.2"},{"url":"https://github.com/eclipse-theia/theia/releases/tag/v1.72.1","date":"2026-05-29T12:04:49Z","type":"stable","version":"v1.72.1"},{"url":"https://github.com/eclipse-theia/theia/releases/tag/v1.72.0","date":"2026-05-28T14:14:04Z","type":"stable","version":"v1.72.0"},{"url":"https://github.com/eclipse-theia/theia/releases/tag/v1.71.2","date":"2026-05-27T15:57:40Z","type":"stable","version":"v1.71.2"},{"url":"https://github.com/eclipse-theia/theia/releases/tag/v1.71.1","date":"2026-05-11T09:28:09Z","type":"stable","version":"v1.71.1"},{"url":"https://github.com/eclipse-theia/theia/releases/tag/v1.71.0","date":"2026-04-30T12:29:04Z","type":"stable","version":"v1.71.0"},{"url":"https://github.com/eclipse-theia/theia/releases/tag/v1.70.2","date":"2026-04-10T09:50:27Z","type":"stable","version":"v1.70.2"},{"url":"https://github.com/eclipse-theia/theia/releases/tag/v1.70.1","date":"2026-04-08T10:03:27Z","type":"stable","version":"v1.70.1"},{"url":"https://github.com/eclipse-theia/theia/releases/tag/v1.70.0","date":"2026-03-26T14:55:36Z","type":"stable","version":"v1.70.0"},{"url":"https://github.com/eclipse-theia/theia/releases/tag/v1.69.0","date":"2026-02-26T15:25:49Z","type":"stable","version":"v1.69.0"},{"url":"https://github.com/eclipse-theia/theia/releases/tag/v1.68.2","date":"2026-02-05T15:18:28Z","type":"stable","version":"v1.68.2"}]` |
| security.scorecard | 3.2 | 5 |
| security.vulnerabilities | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=go&package_name=github.com%2Femacs-mirror%2Femacs&per_page=100","last_12m":0,"max_severity":null}` | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=%40theia%2Fmarkers&per_page=100","last_12m":0,"max_severity":null}` |

## Capabilities (IDEs & Code Editors)

| Capability | Emacs | Theia |
|---|:--:|:--:|
| **Core** |  |  |
| Type | Terminal editor | Full IDE |
| Language scope | Polyglot | Polyglot |
| **Deployment** |  |  |
| Deployment | Desktop | Both |
| **Platform support** |  |  |
| OS support | GNU/Linux, Windows, macOS, BSD, Haiku, Android | Cross-platform (browser and desktop via Electron) |
| Base platform | Original | Original |
| **Extensibility** |  |  |
| Extensibility | Plugins | Extension marketplace |
| **DX** |  |  |
| LSP / DAP support | ✓ | ✓ |
| Remote / dev-containers | ✗ | - |
| Integrated debugger / profiler | ✓ | - |
| Code intelligence depth | LSP-grade | LSP-grade |
| Built-in git integration | ✗ | - |
| **AI** |  |  |
| Built-in AI | None | Native |
| **Licensing** |  |  |
| Openness | Open-source | Open-source |
| **Pricing** |  |  |
| Pricing model | Free | Free |

*Source: vioscaleAI. Generated 2026-10-16T17:47:48.277Z. "-" = undocumented, not absent.*