Reviewed by the NexaToolkit team · Last reviewed June 2026. This is a tools overview, not legal advice; always validate AI output and follow your jurisdiction’s rules on AI use. NexaToolkit may earn a commission from links on this page — it never changes what we recommend.
Case discovery — reviewing thousands of documents to find what matters — is the most time-consuming, expensive part of litigation, and where AI delivers the biggest leverage for lawyers. But the tools split sharply by firm size and budget. Here’s what helps with discovery in 2026, by firm size, with real pricing.
For eDiscovery at scale: Everlaw
Everlaw is the litigation/eDiscovery specialist — predictive coding, AI document review, natural-language queries across millions of documents, and structured trial prep. The pick when high-volume document review is the bottleneck (enterprise pricing).
For research + review: CoCounsel
CoCounsel (Thomson Reuters, built on Casetext; ~$200–$400/user/month, or $500–$800 bundled with Westlaw) handles document review, legal research, deposition prep, and brief drafting on Westlaw’s content library. The mid-to-large-firm standard.
For BigLaw: Harvey
Harvey AI ($1,000+/user/month) offers the deepest legal reasoning for large, complex matters — built and priced for BigLaw, prohibitive for solos.
For solo and small firms: budget AI
Solo and small-firm lawyers priced out of the above use tools like LegesGPT ($19.99–$69.99/month) or general ChatGPT/Claude ($20) for summarizing and first-pass review — with mandatory human verification of every output.
Legal AI tools by firm size
| Tool | Price/user/mo | Best for |
|---|---|---|
| Everlaw | Enterprise | High-volume eDiscovery |
| CoCounsel | $200–$800 | Mid/large firms (Westlaw) |
| Harvey AI | $1,000+ | BigLaw, complex matters |
| LegesGPT | $19.99–$69.99 | Solo/small firms |
| ChatGPT/Claude | $20 | Budget first-pass (verify!) |
A real scenario
A mid-size firm facing a discovery deadline with 200,000 documents: Everlaw‘s predictive coding surfaces the relevant set in days instead of weeks of associate review, and CoCounsel (~$225/user) drafts the deposition prep and research around it — the time saved on review alone dwarfs the license cost. A solo attorney can’t justify those prices and instead uses LegesGPT or Claude ($20) for summarizing, verifying everything by hand. The one non-negotiable across all of them: a lawyer validates every AI output — hallucinated citations are a known risk.
Frequently asked questions
What AI tools help lawyers with case discovery?
Everlaw for high-volume eDiscovery (predictive coding), CoCounsel ($200–$800/user) for research plus review at mid/large firms, Harvey ($1,000+) for BigLaw, and LegesGPT ($19.99–$69.99) or ChatGPT ($20) for solos — always with human verification.
Is there an affordable legal AI tool for solo lawyers?
Yes — LegesGPT ($19.99–$69.99/month) and general ChatGPT/Claude ($20) handle summarizing and first-pass review. Enterprise tools (CoCounsel, Harvey) price out most solos.
Can AI be trusted for legal document review?
As an accelerator, yes — but never unsupervised. AI can hallucinate citations and misread context, so a lawyer must validate every output. Treat it as a fast first pass, not a final answer.
More: see our AI research tools and AI productivity tools.
