The short answer: for the legal work (research, drafting) — Paxton AI, Spellbook, or CoCounsel if you have Westlaw. For running the practice (inbox, deadlines, client replies, matter prep) — BeforeNine, $99/mo with a free trial. They’re different categories; the best small firms usually run one of each. Enterprise tools like Harvey won’t sell to firms your size.
Best by job, at a glance
Pricing per public reporting and published tiers as of 2026 — confirm with each vendor. BeforeNine builds this site; the “ours” row is ours, and we say so. Not affiliated with any other tool listed.
The two-question test
1. Where do your evenings actually go? If it’s research memos and contract redlines, buy a research tool first. If it’s the inbox, the follow-ups you owe clients, and the low-grade fear of a missed deadline — that’s practice operations, and no research tool fixes it.
2. Will you actually be allowed to buy it? Enterprise legal AI (Harvey, Lexis+ AI) is sold by contract with seat minimums. For a small firm the practical menu is the self-serve tools above — which is fine, because they’re also the ones priced for you.
Questions, answered plainly.
There is no single best — match the tool to your bottleneck. If the bottleneck is the legal work itself (research, drafting), pick a research tool: Paxton AI (~$499/user/mo, self-serve), Spellbook for contracts, or CoCounsel if you already pay for Westlaw. If the bottleneck is running the practice — the inbox, deadlines, client follow-ups, matter prep — that is a different category, and BeforeNine ($99/mo, free trial, approval-gated) is built specifically for it. Many small firms end up with one of each.
Generally no. Harvey is sold by enterprise contract at reported ~$1,200 per user per month with 25–50 seat minimums — built for large firms. Solo and small firms use self-serve tools instead; see our full list of Harvey AI alternatives.
Self-serve legal AI runs roughly $20–$500 per user per month depending on depth: Spellbook entry tiers ~$20–40, CoCounsel $75–$500, Paxton ~$499. Practice-operations AI like BeforeNine is $99/mo flat with a free trial. Enterprise platforms (Harvey) are quote-only with six-figure effective floors.
Ask three questions of any vendor: does it connect through official APIs with your explicit permission, does anything send without your approval, and can you disconnect instantly? BeforeNine’s answers: yes, nothing, and one tap. For legal research, also confirm the tool cites sources rather than answering from memory — and verify citations in your primary source regardless of vendor.
No — and be skeptical of tools that claim it. What it replaces is the after-hours triage, the first drafts, the deadline-watching and the follow-up chasing. A paralegal runs $25–35/hour; an AI back-office assistant runs about $7/day and works around the clock. Most firms use the AI to make the humans they have go further.