Microsoft Copilot alternatives for chat and files

ONLYOFFICE Docs combines Office-format editing with AI summaries, rewriting and macro creation. Shared editing, comments and tracked changes support team review, with Ollama available through the configured AI plugin.

Nextcloud Assistant summarizes mail and chat, rewrites documents and answers questions about files inside Nextcloud Hub. It suits teams moving their productivity workflow to Nextcloud, with the available AI tasks depending on configured providers.

OpenAgent handles tasks that read or write Word, Excel and PowerPoint files and answer questions from uploaded business documents. It is an agent for working with those files; it does not provide the Office editing interface itself.

GPTLocalhost connects Microsoft Word to a separate local model server or cloud provider. Document generation, translation and dialogue across documents make it relevant specifically to Copilot-in-Word work; it does not cover Excel or Outlook integration.

Onyx covers questions about company knowledge spread across workplace apps. Its search checks source permissions, and agents can turn findings into reports or downloadable documents. This is workplace search and research rather than editing inside Office.

LibreChat covers multi-provider chat, uploaded-file work and assistants that execute code or use connected tools. It suits Copilot users who want one self-hosted conversation workspace, including teams sharing agents and controlling access.

Cherry Studio offers desktop chat with text, images, Office files and PDFs, plus translation and MCP connections. It suits individual users who want conversations and file analysis without deploying a shared chat server.

Everywhere uses the app on your screen as context for questions about reports, charts or errors. It can then work with files, browser tools or terminal scripts, making it useful for desktop assistance across apps rather than only an attached-file chat.

PipesHub searches company knowledge across Microsoft 365 and other connected business systems while retaining source permissions. Answers include source links and highlighted evidence, and its agents can create reports or act across those tools.

Open WebUI combines model chat, document context, notes and shared workspaces. Agents can analyze files or run scripts through a separately connected Open Terminal; it replaces the conversational and file-work side of Copilot.

Khoj searches your documents and the web, supports custom agents and schedules recurring research. It suits replacing Copilot questions that depend on personal files or outside information, with local or online model choices.

Data Formulator covers spreadsheet analysis with natural-language questions and editable charts. Its Data Thread keeps tables and explanations beside each result, with branches for alternative investigations. It is a separate analysis workspace rather than an Excel add-in.

DB-GPT suits business analysis across databases, documents and spreadsheet files. Agents generate SQL or Python and produce charts, dashboards or reports. It handles the analysis in its own workspace rather than inside Microsoft 365 apps.

WeKnora provides cited document answers and agent tasks in a team knowledge workspace. Scoped access, identity connections and audit logs govern that work; its documented source integrations include Confluence, GitLab, Notion and Feishu.

ThunderAI covers email drafting and inbox triage inside Thunderbird. It summarizes messages, suggests tags and applies classification rules, with reviewable proofreading for replies. It serves the mail workflow in Thunderbird rather than Outlook.