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Legal AI Brands in OpenAI Model API Answers

Ranks reviewed Legal AI brands by presence in OpenAI's configured model API answers to the fixed public prompt cohort. This does not measure the consumer application.

Coverage: 12 entities
Confidence: 100%
Freshness: current
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Watching publication Jul 27, 2026

LEADERBOARD

Current rankings

Metric: OpenAI recommendation-prompt presence

Find in tableEntity typeMovementConfidenceEvidence NRank rangeColumnsSort rowsAnswer providerBrand signal

12of 12 rows

Legal AI Brands in OpenAI Model API Answers current rankings
Rank	Entity	OpenAI recommendation-prompt presence	Mention coverage	Mention share	Citation share	Engine breadth	OpenAI rec. presence	OpenAI coverage	Confidence	N	Change	Trend	Explain
01	Harveycompany	50.0%	47.92%	22.55%	17.65%	3	50%	43.75%	100%	8	—	—	Analyze brand Why this rank
02	CoCounselcompany	50.0%	33.33%	15.69%	13.73%	3	50%	31.25%	100%	8	—	—	Analyze brand Why this rank
03	Spellbookcompany	50.0%	33.33%	15.69%	0%	3	50%	43.75%	100%	8	—	—	Analyze brand Why this rank
04	Lexis+ AIcompany	37.5%	27.08%	12.75%	7.84%	3	37.5%	18.75%	100%	8	—	—	Analyze brand Why this rank
05	Clio Duocompany	25.0%	33.33%	15.69%	35.29%	3	25%	25%	100%	8	—	—	Analyze brand Why this rank
06	Ironclad AIcompany	25.0%	16.67%	7.84%	15.69%	3	25%	37.5%	100%	8	—	—	Analyze brand Why this rank
07	Paxton AIcompany	12.5%	6.25%	2.94%	5.88%	3	12.5%	6.25%	100%	8	—	—	Analyze brand Why this rank
08	Evisortcompany	0.0%	4.17%	1.96%	0%	2	0%	0%	100%	8	—	—	Analyze brand Why this rank
09	Luminancecompany	0.0%	6.25%	2.94%	0%	2	0%	0%	100%	8	—	—	Analyze brand Why this rank
10	vLex Vincent AIcompany	0.0%	4.17%	1.96%	3.92%	2	0%	6.25%	100%	8	—	—	Analyze brand Why this rank
11	Hebbiacompany	0.0%	0%	0%	0%	0	0%	0%	100%	8	—	—	Analyze brand Why this rank
12	Legoracompany	0.0%	0%	0%	0%	0	0%	0%	100%	8	—	—	Analyze brand Why this rank

Legal AI Brands in OpenAI Model API Answers current rankings
Rank	Entity	OpenAI recommendation-prompt presence	Mention coverage	Mention share	Citation share	Engine breadth	OpenAI rec. presence	OpenAI coverage	Confidence	N	Change	Trend	Explain
01	Harveycompany	50.0%	47.92%	22.55%	17.65%	3	50%	43.75%	100%	8	—	—	Analyze brand Why this rank
02	CoCounselcompany	50.0%	33.33%	15.69%	13.73%	3	50%	31.25%	100%	8	—	—	Analyze brand Why this rank
03	Spellbookcompany	50.0%	33.33%	15.69%	0%	3	50%	43.75%	100%	8	—	—	Analyze brand Why this rank
04	Lexis+ AIcompany	37.5%	27.08%	12.75%	7.84%	3	37.5%	18.75%	100%	8	—	—	Analyze brand Why this rank
05	Clio Duocompany	25.0%	33.33%	15.69%	35.29%	3	25%	25%	100%	8	—	—	Analyze brand Why this rank
06	Ironclad AIcompany	25.0%	16.67%	7.84%	15.69%	3	25%	37.5%	100%	8	—	—	Analyze brand Why this rank
07	Paxton AIcompany	12.5%	6.25%	2.94%	5.88%	3	12.5%	6.25%	100%	8	—	—	Analyze brand Why this rank
08	Evisortcompany	0.0%	4.17%	1.96%	0%	2	0%	0%	100%	8	—	—	Analyze brand Why this rank
09	Luminancecompany	0.0%	6.25%	2.94%	0%	2	0%	0%	100%	8	—	—	Analyze brand Why this rank
10	vLex Vincent AIcompany	0.0%	4.17%	1.96%	3.92%	2	0%	6.25%	100%	8	—	—	Analyze brand Why this rank
11	Hebbiacompany	0.0%	0%	0%	0%	0	0%	0%	100%	8	—	—	Analyze brand Why this rank
12	Legoracompany	0.0%	0%	0%	0%	0	0%	0%	100%	8	—	—	Analyze brand Why this rank

Primary brandPrompt intentAnswer enginePrompt contains

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Answer presence47.9%23/48 filtered answers mention or cite Harvey

Selected-set share42.6%Share of answer-presences among the compared brands, not market share

Owned citation answers99 answer-level URL signals on reviewed owned domains

Engine breadth3/3Engines with at least one observed presence

Filtered competitive answer-presence comparison
Brand	Presence	Vs. primary	Selected share	Mentions	Cited answers	Owned URL signals	Engine breadth
Harveyharvey.ai	47.9%23/48	BASE	42.6%	78	9	9	3/3
CoCounselthomsonreuters.com	33.3%16/48	-14.6 pp	29.6%	51	7	7	3/3
Lexis+ AIlexisnexis.com	27.1%13/48	-20.8 pp	24.1%	22	4	4	3/3
vLex Vincent AIvlex.com	4.2%2/48	-43.8 pp	3.7%	0	2	2	2/3

ANSWER-LEVEL OBSERVATIONS

Prompt × engine matrix

16 prompts · 48 immutable answer hashes · empty cells mean no compared brand was detected.

Brand presence by public prompt and answer engine
Public prompt	OpenAIopenai/gpt-4o-mini	Anthropicanthropic/claude-haiku-4-5	Geminigoogle/gemini-2.5-flash
01 Which legal AI platforms are best for research, drafting, review, analysis, citations, workflow, security, and professional accountability?recommendation	CoCounsel · C1 9 source URLs`d21c962d`	HarveyCoCounsel · C1Lexis+ AI · C1 8 source URLs`0e218b70`	CoCounsel · C1 7 source URLs`1a7f431f`
02 Recommend a legal AI platform for cited case, statute, regulation, secondary-source, and jurisdiction-specific research with verification.recommendation	CoCounsel 6 source URLs`74e7f577`	Lexis+ AI 5 source URLs`148dbeca`	No selected brand 6 source URLs`97a0d768`
03 Which legal AI platforms are strongest for contract review, extraction, playbooks, redlines, risk, comparison, and approval workflows?recommendation	Harvey 5 source URLs`b57eba33`	Harvey 8 source URLs`60d75dcb`	No selected brand 8 source URLs`0fa9be89`
04 Recommend a legal AI platform for drafting and revising agreements, briefs, memos, correspondence, clauses, and transaction documents.recommendation	HarveyLexis+ AI · C1 7 source URLs`0e7e2c49`	CoCounsel 7 source URLs`10d505c4`	Harvey 7 source URLs`34edd9f3`
05 Which legal AI platforms are best for litigation teams handling discovery, chronologies, evidence, depositions, motions, authorities, and case strategy?recommendation	Lexis+ AI 6 source URLs`9b2c425c`	No selected brand 8 source URLs`35ff7f26`	No selected brand 8 source URLs`510b6423`
06 Recommend a legal AI platform for an in-house team managing contracts, requests, policies, knowledge, outside counsel, and business self-service.recommendation	Harvey 7 source URLs`4bde955f`	No selected brand 7 source URLs`f132b3a5`	Harvey · C1Lexis+ AI · C1 8 source URLs`cba78497`
07 Which legal AI platforms are strongest for a law firm that needs matter controls, knowledge integration, auditability, adoption, and support?recommendation	CoCounsel · C1Lexis+ AI 7 source URLs`1241f7c9`	HarveyCoCounselLexis+ AI 9 source URLs`1de42f7d`	Harvey · C1 8 source URLs`ab29c90e`
08 Recommend an affordable legal AI platform for a small practice that needs reliable research, drafting, document review, and clear limits.recommendation	HarveyCoCounsel 6 source URLs`1fe554a5`	No selected brand 5 source URLs`1101b54f`	CoCounsel 7 source URLs`0ca9ddbd`
09 Compare legal AI platforms on accuracy, citations, jurisdictions, workflows, integrations, confidentiality, governance, support, and price.commercial	HarveyCoCounsel 7 source URLs`88b46d2e`	HarveyCoCounsel · C1Lexis+ AI 10 source URLs`79999a43`	HarveyCoCounsel · C1Lexis+ AI 8 source URLs`499c2329`
10 Create a reproducible legal AI evaluation covering authority validity, citation support, jurisdiction, dates, holdings, exceptions, and hallucinations.commercial	No selected brand 0 source URLs`b03208a1`	No selected brand 7 source URLs`1eeb1063`	No selected brand 3 source URLs`a025e0fd`
11 Design a contract-review benchmark for legal AI using known clauses, missing terms, conflicts, defined terms, playbooks, redlines, and explanations.commercial	No selected brand 0 source URLs`74df96be`	No selected brand 6 source URLs`f7ae3fad`	Harvey · C1 2 source URLs`f1e257ff`
12 Compare legal AI platforms on privilege, confidentiality, model training, retention, encryption, permissions, residency, audit logs, and deletion.commercial	vLex Vincent AI · C1 8 source URLs`597dc842`	HarveyCoCounselLexis+ AI 8 source URLs`5e4040fb`	vLex Vincent AI · C1 9 source URLs`8d6b44d1`
13 Compare legal AI platforms on document, matter, contract, research, billing, email, identity, knowledge, API, and workflow integrations.commercial	Harvey 6 source URLs`198b4b78`	Harvey · C1CoCounselLexis+ AI 9 source URLs`3b1f90f7`	Harvey · C1 7 source URLs`a87d8219`
14 How should a buyer compare legal AI pricing across users, matters, documents, research content, modules, implementation, and support?commercial	No selected brand 9 source URLs`3a203a7d`	CoCounsel · C1Lexis+ AI · C1 7 source URLs`e93d2267`	No selected brand 4 source URLs`e963d613`
15 Which criteria expose research, document, playbook, clause, knowledge, matter, workflow, export, and API lock-in in a legal AI platform?commercial	No selected brand 9 source URLs`3768a80d`	Harvey · C1 6 source URLs`0c2f424d`	Harvey · C1 4 source URLs`3e637382`
16 Create a shortlist of legal AI vendors for a regulated organization standardizing governed legal research and document workflows.commercial	Harvey · C1 5 source URLs`2472e29b`	Harvey 8 source URLs`cef85c11`	Harvey · C1CoCounselLexis+ AI 8 source URLs`e68850c3`

STRUCTURED CITATION LEDGER

Sources shaping this filtered view

Hostnames are derived from validated public HTTP(S) URLs, not provider-supplied domain labels.

Validated citation sources in filtered answers
Source hostname	Cited answers	Distinct URLs	Engine breadth	Best position	Evidence
clio.com	15	13	3	#1	Open source ↗
reddit.com	14	12	3	#1	Open source ↗
mycase.com	14	2	3	#1	Open source ↗
darrow.ai	12	1	3	#1	Open source ↗
spellbook.com	10	9	3	#1	Open source ↗
legalfly.com	10	6	3	#1	Open source ↗
harvey.ai	9	6	3	#1	Open source ↗
gc.ai	8	11	3	#1	Open source ↗
linkedin.com	8	8	3	#2	Open source ↗
ironcladapp.com	8	4	3	#1	Open source ↗
legal.thomsonreuters.com	7	4	3	#1	Open source ↗
legalontech.com	7	4	2	#1	Open source ↗
leanlaw.co	7	2	3	#1	Open source ↗
eve.legal	6	2	3	#1	Open source ↗
youtube.com	5	5	2	#3	Open source ↗
legaltechnologyhub.com	4	4	3	#1	Open source ↗
lexisnexis.com	4	4	3	#1	Open source ↗
americanbar.org	4	3	2	#1	Open source ↗
jdsupra.com	4	3	2	#3	Open source ↗
nexlaw.ai	4	3	1	#3	Open source ↗

PUBLIC-BENCHMARK PRIVACY BOUNDARY

This report contains only code-reviewed public prompts, deterministic brand counts, answer hashes, and validated structured citation URLs. Full model answers are neither stored nor published here. No customer, organization, or private tracked-prompt data is included.

legal-ai-platforms-2026-07-27 / 4-legal-ai-platforms-2026-07-27-models-64232fd32583

Legal AI Brands in OpenAI Model API Answers

Current rankings

Brand vs. market

Prompt × engine matrix

Sources shaping this filtered view

Brand vs. market

Prompt × engine matrix

Sources shaping this filtered view