Perplexity
Westlaw
| Feature | Perplexity | Westlaw |
|---|---|---|
| Pricing | Free / from $20/mo | Contact sales |
| Free Plan | ✓ Yes | ✗ No |
| Rating | 4.6 / 5 | 4.4 / 5 |
| Best For | researchers, knowledge-workers, students, professionals | law-firms, corporate-legal, judges, legal-researchers |
| Founded | 2022 | 1975 |
| Ai Search | ✓ | ✗ |
| Source Citations | ✓ | ✗ |
| Follow Up Questions | ✓ | ✗ |
| Collections | ✓ | ✗ |
| Pro Search | ✓ | ✗ |
| Api | ✓ | ✗ |
| Case Law | ✗ | ✓ |
| Statutes | ✗ | ✓ |
| Keycite | ✗ | ✓ |
| Ai Research | ✗ | ✓ |
| Practice Specific Tools | ✗ | ✓ |
| Litigation Analytics | ✗ | ✓ |
✓ Perplexity Pros
- Real-time web search with AI
- Cited sources for verification
- Multiple model options
- Good for research
✗ Perplexity Cons
- Can hallucinate despite citations
- Pro features require subscription
- API expensive at scale
✓ Westlaw Pros
- Best KeyCite system
- Comprehensive database
- AI-powered research
- Reliable results
✗ Westlaw Cons
- Very expensive
- Interface learning curve
- Complex pricing
The Verdict
Perplexity is built for researchers and knowledge workers, with a focus on ai-search and source-citations. Westlaw targets law firms and corporate legal and leads with case-law and statutes.
Westlaw uses custom enterprise pricing, while Perplexity starts at $20/mo — a tangible advantage for teams with a fixed budget.
Perplexity has a free plan, which gives it a meaningful edge for individuals and small teams exploring their options. Westlaw requires a paid subscription from day one.
This is a genuinely close comparison. If you can, sign up for both free trials (where available) and run a one-week test with your actual team tasks before deciding.