Claude Projects is the feature that turns Claude from a chatbot into an operating system for knowledge work. Persistent context. Shared knowledge bases. Per-Project system prompts. If you're paying for Claude Pro or Team and not using Projects, you're using maybe 20% of what you bought.
A Claude Project is a dedicated workspace inside Claude that persists three things across every conversation: a system prompt (instructions Claude follows), a knowledge base (documents you upload), and conversation history.
Why it matters: in a regular Claude chat, every conversation starts from scratch. In a Project, every conversation already knows your context — your company, your voice, your past work, your standards. This eliminates the 5–10 minutes of setup work that otherwise happens at the start of every Claude session.
1. Persistent voice and style. Load your brand guide, voice rules, and example writing once. Every output sounds like you.
2. Persistent knowledge. Upload your ICP definition, sales playbook, customer research. Claude can reference all of it on every prompt.
3. Shared team context. On Claude Team, Projects are shared. Your entire team operates against the same prompts, knowledge, and standards. Quality goes up; variance goes down.
4. Workflow specialization. One Project per workflow — "Proposal Drafting," "Account Research," "Customer Email Triage." Each tuned for its specific job.
ChatGPT has Custom GPTs which serve a similar function. Two meaningful differences:
1. Knowledge base ergonomics. Claude Projects handle long-form documents (50K+ words) better. ChatGPT GPTs often summarize or partially read.
2. Team sharing. Claude Team's shared Projects are smoother and more discoverable than ChatGPT's shared GPT setup. For team deployments, Claude has the edge.
Step 1: Decide the workflow this Project serves. One workflow per Project — don't make a mega-Project that tries to do everything.
Step 2: Write the system prompt. 100–300 words. Cover: who Claude is in this Project, what voice and style to use, what to never do, how to flag uncertainty.
Step 3: Load 5–15 documents into the knowledge base. Real examples of good work, your reference materials, your standards.
Step 4: Use it for a week. Note what's missing. Refine the prompt. Add missing documents.
For the full walkthrough, see our guide to setting up Claude Projects.