Based only on the facts in our directory. The right pick still depends on the job you need done.
Lower starting price
Not comparable
Not comparable: Definely does not list a price
Free plan
Tie
Neither has one
Higher rating
CoCounsel
4.3 against 4.0
Same job?
Yes
Both are Legal AI tools
Side by side
Compared on
CoCounsel
Definely
Our rating
4.3Better
4.0
Starts at
$375/mo
Not listed
Free plan
No
No
Category
Legal AI
Legal AI
Plans
From $375/mo
See pricing
Key features
First AI legal assistant built on GPT-4, launched March 2023
Backed by Thomson Reuters after a $650M acquisition of Casetext
Multi-model architecture spanning Anthropic, OpenAI, and Google models
1 million users across 107 countries and territories by 2026
Optional integration with Thomson Reuters' Practical Law guides and templates
AI drafting, editing, and proofreading built for complex negotiated documents
Catches defined-term errors and cross-reference mistakes in dense contracts
Nearly tripled annual recurring revenue in 2024
Works with roughly 100 in-house legal teams and law firms
$30M Series B led by Revaia, with legal tech company Clio participating
Pros
Thomson Reuters backing brings deep legal-content integration most competitors lack
Massive user scale, 1 million users, validates broad real-world adoption
Multi-model architecture avoids dependence on one AI provider
Founders' Big Law background shows in a focus on genuinely complex documents
Strong recent revenue growth validates real demand among legal teams
Backed by Clio, a legal tech company with direct category expertise
Cons
Practical Law integration requires the higher-priced tier to access fully
Backed by a legacy legal publisher rather than operating as an independent AI-first startup
Entry pricing at $4,500 a year per user still represents a real budget commitment
Pricing isn't published, requires a sales conversation to get a quote
Narrower focus on document precision rather than full contract lifecycle management
Smaller company with less brand recognition than larger legal AI platforms
Company
Thomson Reuters, founded 2023
Definely, founded 2020
Prices come from each vendor's pricing page, last checked 20260715. Check the vendor before you buy.
FAQ
Questions people ask
Is CoCounsel better than Definely?
In our reviews CoCounsel scores 4.3 and Definely scores 4.0. The better pick depends on the job. CoCounsel: Reached 1 million users in 3 years, backed by Thomson Reuters after a $650M acquisition. Definely: Nearly tripled ARR in a single year, built by two former Freshfields lawyers.
CoCounsel
Definely
