# Casetext

**Canonical:** https://apis.io/providers/casetext/  
**Website:** https://casetext.com  
**APIs profiled:** 0

Casetext is a legal technology company founded in 2013 by Jake Heller, Joanna Huey, and Laurence Pfeffer and headquartered in San Francisco, California. The company built one of the earliest neural-search engines for U.S. case law (Parallel Search) and a broader research platform covering federal and state cases, statutes, regulations, and secondary sources, with citator signals delivered through its SmartCite feature. Casetext is best known for CoCounsel, a generative-AI legal assistant released in March 2023 and originally built on top of OpenAI's GPT-4, that automates document review, deposition preparation, contract analysis, legal research memos, and database queries for law firms and in-house legal teams. Companion products include AllSearch, a private document search tool that lets firms run Parallel Search across their own document collections, and Compose, an automated brief-drafting product. Thomson Reuters acquired Casetext in June 2023 for $650 million in an all-cash deal that closed on August 17, 2023, and CoCounsel has since been integrated across Thomson Reuters' Westlaw, Practical Law, and HighQ product lines as the company's flagship legal-AI assistant. Casetext is now a RETIRED BRAND rather than an active provider: casetext.com began redirecting to a Thomson Reuters CoCounsel page on February 1, 2025, CoCounsel 1.0 access on the Casetext platform ended March 31, 2025, and the standalone platform was shut down on April 1, 2025. As of August 2026 every path on the domain returns HTTP 410 Gone behind a hand-written retirement notice pointing users to Westlaw, and the developer-facing subdomains do not resolve. Casetext never published a public developer API, SDK, or machine-readable specification of any kind; the casetext GitHub organization holds 79 fully archived repositories — research forks (transformers, ELECTRA, pgvector, FiD) and early JavaScript infrastructure utilities — and the 15 npm packages it published are general-purpose libraries rather than API clients, the newest released in June 2018.

## Kin Score — 6.4 / 100 (minimal)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 6.4).

| Facet | Score |
|---|---|
| Discoverability | 57.4 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 5.3 |
| Developer Ergonomics | 0.0 |
| Commercial Clarity | 0.0 |
| Access Clarity | 0.0 |

## Agent readiness — 3.0 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Retired — onboarding: unknown, pricing: unknown, trial: no (confidence: high).

## Security (1)

- **Casetext Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC

## Plans (1)

- **Casetext Plans Pricing**

## Tags

Legal, Legal Tech, Legal Research, Case Law, Legal AI, Generative AI, CoCounsel, Parallel Search, AllSearch, Compose, SmartCite, Document Review, Contract Analysis, Deposition Preparation, Thomson Reuters

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/casetext/). Scores are computed from the provider's own public artifacts under a published rubric.