Cotask drafts and edits Word documents, builds spreadsheets and slide decks, generates and edits images, and researches the web — then hands you real files, not just a chat reply. Private by design.
Edits your actual .docx with tracked changes you can accept or reject. Real files in, real files out — not text in a chat window.
Builds Excel models with live formulas and PowerPoint decks from a brief. The agent writes structured data and slides directly.
Generate diagrams, mockups, and illustrations — or edit an image you already have. Drop the result straight into your docs and decks.
Searches and reads live web sources, then synthesizes an answer with inline citations. Facts you can trace, not a guess.
Pick your model. See every cost. Zero-retention endpoints always.
Open-source skills and tools on GitHub. Audit the code, verify the logic. No black box.
Draft from scratch, rewrite, and edit with tracked changes. Compare versions. Full round-trip: upload a DOCX, get a DOCX back.
Build financial models, trackers, and reports with live formulas. The agent reads, writes, and updates structured data directly.
Generate pitch decks, status updates, and board presentations from a brief. Create new slides or restyle existing ones directly.
Read and extract from PDFs. Generate and edit images, then drop them straight into your documents and slides.
Upload a file or just say what you need: a draft, a model, a deck, an image, or an answer from the web.
Drafts, edits, builds, researches, generates. Picks the right tools automatically. You see every action and its cost.
Word docs, spreadsheets, slide decks, images, and research with citations — ready to download and use.
Group by project, client, or team — whatever fits how you work. Cotask doesn't impose structure. You name the folders, and the agent follows.
Drop an agents.md file into any folder with plain-language instructions. When the agent works on a document, it inherits every instruction from the workspace root down to the current folder, automatically. New teammate joins? They inherit your standards on day one.
The agent knows everything. You repeat nothing.
Brief it once per level. Every file in that folder inherits the context.
Cotask compiles your documents into a structured per-workspace knowledge base: key terms, facts, people, and project context. The agent reads it before every task. Your second brief inherits the first.
Plain markdown with backlinks. No vector database, no opaque embeddings. Portable, version-controllable, yours.
Key terms and entities across your files become linked entries. Cross-reference people, projects, and prior decisions in one place.
Built a model last quarter? The agent remembers your assumptions. Wrote the Q1 report? The knowledge base has it on file.
Skills are portable instruction files that tell the agent what to do. Use ours, customize them, or create your own. Standardize how your team drafts, builds, and researches across every project.
Writes Word documents from your templates or from scratch, applying your house style and preferred structure automatically.
Turns a brief or a document into a PowerPoint deck — structured slides, speaker notes, and on-brand styling.
Searches and reads live web sources, then synthesizes answers with inline citations. Built-in anti-hallucination rules.
Generates and edits images from a prompt or an existing picture — diagrams, mockups, and illustrations, with iterative edits.
Skills are portable files your team owns. Export them, version-control them, share them across your organization.
Compatible with Anthropic's published skills. Drop in a SKILL.md from anthropics/knowledge-work-plugins and it loads unmodified.
Explore Skills →
Multi-LLM. Open source. Self-hostable. Zero Data Retention from $19/mo. An AI agent that produces real files — not just chat.
| Typical AI chat tools | Cotask | |
|---|---|---|
| Produces real editable files (docx, xlsx, pptx) | Text in a chat window | ✓ Real files in and out |
| Choose any LLM (including open-source weights) | Locked to vendor stack | ✓ Any LLM |
| Self-host on your own infrastructure | ✗ Not available | ✓ Yes |
| Open-source agent on GitHub | ✗ Closed | ✓ Yes |
| Generates and edits images, then drops them in your docs | Separate tools, manual handoff | ✓ One workspace |
| Zero Data Retention (vendor doesn't store your prompts) | Not on $20–200 ChatGPT Plus/Pro or Claude Pro/Max. Sales-led enterprise only. | ✓ Self-serve, all tiers |
| No rate limits on sustained workload | Consumer tiers cap; advanced models throttle | ✓ Frontier OSS LLMs, no caps |
| Transparent, per-action cost | Flat fee, opaque usage | ✓ See every cost |
Closed LLMs with “zero data retention” agreements. ZDR is a contractual promise, not a technical guarantee. You can't verify what happens on their infrastructure, what exceptions apply, or how government requests are handled.
Cotask runs on any LLM you choose, including open-weights models with zero-retention endpoints. Or run the whole thing on your own infrastructure, so your files never leave your network. Audit every line of agent code on GitHub.
Open source. Any LLM, including local models. Audit the code, run it anywhere.
Your laptop, your cloud, your firm's servers. No vendor in the data path.
Kimi, Claude, GLM, GPT, DeepSeek, Gemini, or local Ollama models. Switch any time.
Every tool, every prompt, every commit on GitHub. No black box.
Bring your own LLM keys, infrastructure, and ops time. Open source on GitHub.
It's the same platform. You just organize it around how you work.
Draft updates, build board decks, model the budget, and research the market — without context-switching across five tools.
Turn research into spreadsheets, spreadsheets into slides, and slides into a polished report — with citations the agent can trace.
Draft copy, generate and edit images, and assemble decks that match your brand, all in one place.
Stop shadow AI. Give your teams a sanctioned, private workspace with auditable tools instead of sensitive files scattered across chat apps.
Every plan includes the full AI toolkit. See the cost of every action. No hidden fees.
Prefer to run it yourself? Cotask is open source. View on GitHub →