Sidebarlex vs. Harvey AI, Clio Duo, and ChatGPT: which AI is safe for your client data?
ChatGPT is excellent. So is Harvey AI. But when you upload a client file to any cloud tool, the data leaves your office. For attorneys, that's the wrong trade-off. Here's how every option compares on the one thing that matters most: privilege compliance.
| Feature | ChatGPT / Claude | Harvey AI | Clio Duo AI | DIY Ollama | Sidebarlex |
|---|---|---|---|---|---|
| Client data stays on your computer | ✗ No | ✗ No | ✗ No | ✓ Yes | ✓ Yes |
| No third-party data processor | ✗ No | ✗ No | ✗ No | ✓ Yes | ✓ Yes |
| Privilege-safe architecture | — Depends on DPA | — Depends on DPA | — Depends on DPA | ✓ Yes | ✓ Yes |
| Pre-loaded legal library | — General training only | ✓ Yes | — Limited | ✗ You build it | ✓ Yes — FRCP, FRE, all 50 state bar rules |
| Practice-area knowledge base | — General only | ✓ Yes | — Limited | ✗ You build it | ✓ Configured at setup |
| Custom prompt templates | — You write them | ✓ Yes | — Limited | ✗ You write them | ✓ 6 templates pre-built |
| Browser-based, no CLI | ✓ Yes | ✓ Yes | ✓ Yes | ✗ CLI required | ✓ Yes — browser only |
| Monthly subscription | $20–$200/mo | $500+/mo | Included in Clio plan | ✓ None | ✓ None |
| One-time setup cost | — | — | — | Your time (10–40 hrs) | $500–$2,000 |
| Technical skill required | ✓ None | ✓ None | ✓ None | ✗ Significant | ✓ None — I handle setup |
| Time to first use | Minutes | Days–weeks (sales) | Days (onboarding) | Weeks (DIY) | 2–4 hours |
| Answers cite their source | ✗ No citation | — Varies | — Varies | ✗ Not by default | ✓ Every answer, every time |
Harvey AI pricing and features based on publicly available information as of April 2026. DPA = Data Processing Agreement. Privilege analysis is not legal advice.
DIY vs. Sidebarlex — the same 23 questions, tested
We ran 23 questions across a set of professional legal documents. Three setups: a fresh DIY install with no configuration, the same DIY install tuned to its absolute best, and Sidebarlex.
DIY — fresh install
0 / 23
questions returned a source citation
2
answers contained facts not in the documents
11s
average response time
DIY — fully tuned
10 / 23
questions returned a source citation
0
answers contained facts not in the documents
77s
average response time — unusable in practice
Sidebarlex
19 / 23
questions returned a source citation
0
answers contained facts not in the documents
9s
average response time
DIY "fully tuned" = hybrid search enabled, multilingual embedding model, reranker active — the maximum a technical user could configure. The 4 uncited questions in Sidebarlex were unanswerable: the source document was not in the test set.
"Can't I just install this myself?"
Yes — the underlying software is free and open source. If you have a spare afternoon and enjoy terminal commands, you can get a model running in a few hours.
What you'll get is a blank model with no legal knowledge. It won't know the civil procedure rules. It won't know your state's discovery obligations. It won't have your bar's ethics opinions. It won't cite its sources. You'll spend weeks building something useful, if you know how.
What you're paying for isn't the software. The software is free. You're paying for a system that works like a legal research tool from day one — one that quotes the rule and tells you exactly where it found it.
DIY Ollama — what you actually get
- ✗A blank model that doesn't know the FRCP exists
- ✗No document upload interface unless you build one
- ✗No prompt templates. You write every prompt from scratch
- ✗No jurisdiction rules loaded. You find and import them yourself
- ✗CLI-only unless you also install and configure Open WebUI
- ✗10–40 hours of your time to get to something useful
Sidebarlex — what you get instead
- ✓FRCP, FRE, ABA Model Rules pre-loaded before you log in
- ✓Browser interface: upload a document, ask a question
- ✓6 practice-specific prompt templates ready to use
- ✓All 50 US state bar rules and court rules pre-loaded at setup
- ✓Verified on 3 of your real documents before I sign off
- ✓Running in 2–4 hours. I handle every command.
See it on your own documents.
The free version is the demo. Download it, install it, and ask a question about a document you already have. No call needed.