Relativity vs Casetext CoCounsel (Thomson Reuters)
AI Legal Tools pricing comparison · 2026
Relativity pricing ranges from $500–$25000/month, while Casetext CoCounsel (Thomson Reuters) ranges from $225–$900/user/month. Casetext CoCounsel (Thomson Reuters) is typically 90% more affordable, though your actual cost depends on tier and team size.
Relativity
Relativity is the industry-leading eDiscovery and legal analytics platform used by law fir
verified 27d ago
$800
$150K
Casetext CoCounsel (Thomson Reuters)
Casetext CoCounsel, now owned by Thomson Reuters, starts at $225/month for the Solo Attorn
verified 2d ago
$800
$150K
Estimated license cost
at 25 seats
List price × seats. Click a tier below to lock it.
Pricing model unknown
Pricing model unknown
no public list price found
Small Firm
$150K/yr
year 1 license · $500/seat
What buyers actually pay
median, annual
Vendr deal-flow data. The real benchmark, not list price.
Median annual
$800/yr
Vendr · n=61
No Vendr data
—
Not in Vendr's deal flow
REF · 01
Sources & confidence
Every dollar amount and contract clause below traces back to a sourced fact. We don't manufacture composite scores.
Where this data comes from
Vendr · TrustRadius · Reddit · BBB · official docs
Sources
7 sourced facts
4 hidden-cost · 1 contract · Vendr median · 1 review platform
Last verified
3w ago
Confidence
High confidence
Sources
9 sourced facts
7 hidden-cost · 2 contract
Last verified
2d ago
Confidence
Medium confidence
REF · 02
Plans at a glance
Every tier per product. Lock one to drive the cost row above and reveal a tier-specific outbound CTA.
Tier ladder
Click a tier to lock the cost row to it. Locking surfaces a tier-specific Visit CTA.
REF · 04
Contract terms
The fine print, surfaced. Green = buyer-friendly. Each clause backed by a quoted source.
Relativity
Casetext
Auto-renewal
—
Yes
Cancellation
—
—
Commitment
3 years for volume discount pricing
Annual (based on published annual pricing structure)
Price escalation
Volume commitments forced to increase year over year
Historical 'locked in for life' promotional pricing was not honored after Thomson Reuters acquisition; users report expectations of significant uplift at next renewal to align with Westlaw/Lexis tier pricing
Can downgrade
—
—
REF · 05
What users say
Aggregated, with sample sizes. We use whichever review platform has data.
User reviews
TrustRadius · Trustpilot · G2
Decide
Get a quote from each vendor
Each link opens the vendor's pricing page in a new tab.
License cost is computed from publicly listed plans (real math, list price × seats).
Median annual cost is from Vendr's deal flow when available — see source badges.
Hidden costs and contract terms each cite their own sources. We do not invent composite scores.
VS
Relativity and Casetext CoCounsel (Thomson Reuters) both operate in the ai legal tools category. This page compares their list pricing.
Plan-by-Plan Pricing
| Plan | Relativity | Casetext CoCounsel (Thomson Reuters) |
|---|---|---|
| RelativityOne Pay As You Go | Free | $225 /user/month |
| RelativityOne Flex Commit (1-Year) | Free | $500 /user/month |
| RelativityOne Flex Commit (3-Year) | Free | $900 |
Cost at Scale
Total cost of ownership — licenses, implementation, and hidden costs included.
Relativity
6 scenarios$1,250
Boutique Litigation Firm (50GB active data)
$2,500/month for data hosting (50GB x $25-$50/GB). Add $1,750 for initial processing (50GB x $35/GB, one-time per matter). No per-user fees. Total annual cost for steady-state hosting: $15,000-$30,000 plus per-matter processing charges.
$7,500
Mid-Size Corporate Legal Department (500GB, Flex Commit)
$12,500/month ($90,000-$150,000/year) for committed data hosting at discounted rates. Early case assessment data at 33% rate saves $20,000-$40,000/year. Processing costs: $17,500 per 500GB collection (one-time per matter). Total first-year cost: $107,500-$207,500 depending on matter volume.
$50,000
Global Law Firm (5TB, 3-Year Flex Commit)
$100,000/month ($600,000-$1,200,000/year) for committed high-volume hosting with deepest discounts. Cold storage for archived matters at 25% rate provides significant savings. Processing costs: $175,000 per 5TB collection. Total annual cost: $775,000-$1,375,000 including estimated processing, plus potential third-party service provider markups of 20-50%.
Casetext CoCounsel (Thomson Reuters)
3 scenarios$2,700/year ($225/month)
Solo Attorney — Annual Subscription
$6,000/year ($500/month)
Small Firm — Annual Subscription + Supplemental Research
for CoCounsel + estimated $900–$1,500/year per attorney for supplemental research
Custom pricing; comparable enterprise Westlaw seats reported at ~$900/month per seat
Enterprise — Custom-Quoted
Contract Terms
| Term | Relativity | Casetext CoCounsel (Thomson Reuters) |
|---|---|---|
| Auto-renewal | — | Yes |
| Cancellation | — | — |
| Minimum commitment | 3 years for volume discount pricing | Annual (based on published annual pricing structure) |
| Price escalation | Volume commitments forced to increase year over year | Historical 'locked in for life' promotional pricing was not honored after Thomson Reuters acquisition; users report expectations of significant uplift at next renewal to align with Westlaw/Lexis tier pricing |