LegiMatch vs Westlaw
LegiMatch vs Westlaw: which should a small firm choose?
Westlaw and LegiMatch aren't the same kind of product. Westlaw is a complete research library. LegiMatch is a focused tool for finding decisions with facts like yours and checking the citations you rely on. Here's how they compare on the tasks small firms do every week.
Finding cases with facts like yours
In Westlaw you usually search by keywords, headnotes and Key Numbers, or ask its AI. In LegiMatch you describe the matter or upload the complaint, confirm the issues it finds, and get up to 100 similar decisions ranked by a match score that shows how facts, issues, statutes, jurisdiction and recency contributed.
Is it still good law?
KeyCite is one of the most complete citators available, built by editors over decades. LegiMatch shows good-law flags based on later decisions in its own database, with the sentence that treats the case. For a final check on a key authority, a full citator is the stronger tool.
Checking a brief
Both check the citations in a brief. LegiMatch also flags case-name mismatches typical of AI-invented citations, checks quotations and pin cites, and builds a table of authorities.
Price and contract
Westlaw Advantage is sold online from $256.75 a month for firms with up to 10 attorneys, with multi-year discounts; larger firms are quoted. LegiMatch publishes its prices (from $99 a month) and runs month to month.
| Feature | LegiMatch | Westlaw |
|---|---|---|
| Best for | Fact-matched precedent and brief checks | Comprehensive research library |
| Search by facts / upload | Yes, ranked with a visible score (85% top-10 in our published test) | AI research and Quick Check |
| Citator | Good-law flags from later decisions | KeyCite |
| Brief citation check | Yes - caught 98.6% of planted citation mistakes in our published blind tests, with table of authorities | Quick Check (no published accuracy rate) |
| Price | From $99/month (Solo) or $149/user/month (Professional), published; unlimited research | Westlaw Advantage from $256.75/month online (up to 10 attorneys); larger firms by quote |
| Contract | Monthly, cancel anytime; annual saves 2 months | Typically annual or multi-year |
- Best for
- LegiMatch
- Fact-matched precedent and brief checks
- Westlaw
- Comprehensive research library
- Search by facts / upload
- LegiMatch
- Yes, ranked with a visible score (85% top-10 in our published test)
- Westlaw
- AI research and Quick Check
- Citator
- LegiMatch
- Good-law flags from later decisions
- Westlaw
- KeyCite
- Brief citation check
- LegiMatch
- Yes - caught 98.6% of planted citation mistakes in our published blind tests, with table of authorities
- Westlaw
- Quick Check (no published accuracy rate)
- Price
- LegiMatch
- From $99/month (Solo) or $149/user/month (Professional), published; unlimited research
- Westlaw
- Westlaw Advantage from $256.75/month online (up to 10 attorneys); larger firms by quote
- Contract
- LegiMatch
- Monthly, cancel anytime; annual saves 2 months
- Westlaw
- Typically annual or multi-year
Based on publicly available information as of October 2026. Competitor pricing is estimated by third parties; confirm with the vendor.
Westlaw may be better if…
- You use KeyCite and Key Numbers every day
- Your firm already has a firm-wide Westlaw contract
LegiMatch is a fit if…
- You want the right cases for your facts quickly
- You want a simple monthly plan without a long contract
Further reading
Frequently asked questions
Which is better for a solo lawyer, LegiMatch or Westlaw?
It depends on how you research. If you rely on KeyCite and Westlaw's editorial tools daily, Westlaw covers more. If your main need is finding on-point decisions and checking briefs, LegiMatch does that at a lower, published price.
Does LegiMatch use Westlaw content?
No. LegiMatch uses public-domain court opinions and official statute text. It doesn't use any publisher's editorial content and isn't affiliated with Thomson Reuters.
Westlaw is a trademark of its owner. LegiMatch is independent and isn't affiliated with or endorsed by the owner of Westlaw.