Free AI Legal Research Tools in Canada: CanLII Search+, A2AJ, and More (2026)
September 28, 2026 · 8 min read · Casescout Team
A year ago, "free AI legal research in Canada" mostly meant asking ChatGPT and hoping. That has changed. CanLII now has its own AI search assistant, it publishes AI-generated case summaries for several provinces, and an open-data project lets Claude and ChatGPT search real Canadian decisions directly. For a sole practitioner, a student, or a self-represented litigant, these tools are genuinely useful.
They also have real limits, and knowing them is the difference between saving an afternoon and wasting one. This guide covers each free option honestly, including our own free trial, and ends with a simple rule for when free is enough.
CanLII Search+
CanLII launched Search+ in February 2026. It is the most important free AI research tool in Canada because it sits on top of the most important free legal database in Canada.
What it does. You type a question in plain language and Search+ converts it into a structured Boolean query that runs against CanLII's case law, legislation, and commentary. It can also run a contextual analysis of results that identifies significant passages and scores relevance. Answers are drawn only from CanLII's own collection, which is what keeps it from inventing cases.
What it costs. Nothing, but you need a free myCanLII account.
Limits. At launch, usage was capped at 10 query generations and 4 analyses per day, and CanLII has said the limits may change. Reviewers, including a widely read piece in the CBA's National magazine, note that it still hands you a list of results to review one by one rather than a synthesized answer.
Best for. Getting from a plain-English question to a good Boolean search when you are not sure of the right terms. Slaw has a useful tip on exactly this: use Search+ to learn how to build better Boolean searches, then run them yourself without limits. Our guide on how to find a case on CanLII covers the manual side.
CanLII AI case summaries
Separately from Search+, CanLII (through its technology partner Lexum) has added AI-generated case analyses to decision pages, available through a tab at the top of the decision. When the feature was announced in June 2024, it covered close to all case law from Alberta, Saskatchewan, Manitoba, and Prince Edward Island, with more jurisdictions planned. Each summary links back to the original decision.
Best for. Triage. When a search returns 40 decisions, reading the summary first tells you which five deserve a full read. Never cite from the summary; cite from the judgment.
The A2AJ connector for Claude and ChatGPT
Access to Algorithmic Justice (A2AJ) is an academic open-data project that publishes Canadian court decisions, statutes, and regulations as an open dataset. It also runs an MCP server, which lets AI assistants such as Claude and ChatGPT search that dataset directly instead of answering from memory.
What it covers. Per A2AJ, the dataset includes every Supreme Court of Canada decision back to 1877, Federal Court decisions from roughly the last 25 years, and substantial but partial coverage of British Columbia, Nova Scotia, and the Court of Appeal for Ontario, with more than 190,000 decisions in total. A2AJ is candid that big gaps remain.
What it costs. The connector is free with no daily limits. You do need a Claude or ChatGPT plan that supports custom connectors.
Limits. Coverage is the main one: most trial-level provincial decisions, where much practical research happens, are not in the dataset yet. You are also relying on a general-purpose assistant to read and summarize what it retrieves, so misreadings of real cases are still possible. And be deliberate about what client information you type into a consumer AI account.
Best for. SCC and Federal Court research, and anyone already comfortable working inside Claude or ChatGPT.
ChatGPT, Claude, and Gemini on their own
Without a connector like A2AJ, a general chatbot has no database of Canadian decisions to search. When you ask it for cases it answers from memory, which is how Canadian lawyers ended up filing non-existent authorities in cases like Zhang v. Chen, 2024 BCSC 285 and R. v. Chand, 2025 ONCJ 282. Free chatbots are fine for explaining concepts or tidying your own writing. They are not a free legal research tool. Our guide to using ChatGPT under Canadian law society rules explains where the line is.
Other free and low-cost access
- Law school accounts. Students typically get individual Westlaw and Lexis accounts, including their AI features, through their school. Use them while you have them.
- Courthouse and law society libraries. Many provincial law libraries give members access to commercial databases on site or remotely. Check what your library offers before paying for a subscription.
- Casescout free trial. Casescout is free to start with no credit card. It is a paid product, so this is a trial rather than a free tier, but it is a full test of the workflow on your own questions.
Free tools compared
| Tool | Coverage | Gives you | Limits |
|---|---|---|---|
| CanLII Search+ | All of CanLII | Boolean query from plain language, relevance analysis | Daily caps (10 queries, 4 analyses at launch); a result list, not an answer |
| CanLII AI summaries | AB, SK, MB, PEI (expanding) | Short case analysis on the decision page | Not every jurisdiction; triage only |
| A2AJ connector | SCC, Federal Court, partial BC, NS, ONCA | Semantic search inside Claude or ChatGPT | Coverage gaps; needs a compatible AI plan |
| ChatGPT alone | No legal database | Explanations and drafting help | Can invent cases; unsafe for authority |
| Casescout (trial) | Curated Canadian case law and legislation, incl. the Criminal Code | Direct answers with every claim cited to a real decision | Trial, then paid plans from $69/month billed annually |
When free is enough, and when it is not
Free tools are enough when you already know roughly what you are looking for: you need a specific SCC decision, you want to check a citation, you are confirming a statutory provision, or you have time to read through a result list.
They stop being enough when the question is open-ended and the clock is running. "What have Ontario courts done with bail conditions like these in the last two years?" is a question that free tools answer with a list of documents and a few hours of reading. That reading-and-synthesis step is what paid AI research tools charge for. Whether it is worth paying for depends on how often you hit it. If it is weekly, the time saved usually covers the subscription in the first file. Our comparison of the best AI legal research tools in Canada covers the paid options side by side.
Frequently asked questions
Is there a free AI legal research tool for Canadian law?
Yes. CanLII Search+ is free with a myCanLII account, and the A2AJ connector lets Claude or ChatGPT search Canadian court decisions for free. Both answer from real Canadian sources rather than from memory, but both have coverage or usage limits.
What are the CanLII Search+ daily limits?
At launch in February 2026 the limits were 10 search query generations and 4 analyses per day per account. CanLII has said these may change, so check the current limits in your myCanLII account.
What is the A2AJ Canadian legal data connector?
A2AJ (Access to Algorithmic Justice) publishes an open dataset of Canadian decisions, statutes, and regulations and runs an MCP server so AI assistants can search it. You add it as a custom connector in Claude or ChatGPT. Coverage is strongest for the Supreme Court of Canada and the Federal Court.
Can I cite a case I found with a free AI tool?
You can cite the case, never the AI's description of it. Open the full judgment, read the paragraph you rely on, and note the case up. That is the same standard whether the tool is free or paid.
Is free AI legal research safe for client information?
Be careful. CanLII Search+ runs inside CanLII, but connectors like A2AJ run through your personal Claude or ChatGPT account, which has its own data terms. Keep identifying client details out of research questions; you rarely need them to find the law.