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ThoughtRiver
What it is
ThoughtRiver is an AI tool for reviewing contracts before or after signature. Its Lexible language model identifies contract issues, obligations and risks, while Playbooks assess terms against preset criteria and show which provisions meet or miss those criteria. Reviews can produce written output or redlines, and generative editing is designed to follow a user's drafting style and negotiation guidelines. Contracts can be sent by email, drag and drop, or the Word add-in; the platform also works within Outlook, Word and Teams. Integrations include Microsoft 365, Power BI, HighQ and iManage, and a public API follows the OpenAPI Specification. The system is trained on more than 4,150 lawyer-built concepts. ThoughtRiver focuses on in-house legal teams and law firms handling over 200 agreements annually, while also supporting non-legal teams. It is available through web, Windows, extension and API. There is no free plan; a 28-day trial is listed. Monthly plans are $6, $14 and $49 a month. Legal-team plans start at £15,000 per year.
For and against
For
- Flags issues, obligations and risks within minutes.
- Playbooks identify met and unmet provisions.
- Generative editing follows drafting style and negotiation guidelines.
- Works within Outlook, Word and Teams.
- Public API follows the OpenAPI Specification.
Against
- No free plan.
- 28-day trial is listed.
- Professional plan starts at £15,000 per year.
The verdict
ThoughtRiver combines contract analysis with Playbook-based review, redlining and generative editing. Its listed entry plans are monthly, while plans for legal teams start at £15,000 per year.
Who it suits
It suits in-house legal teams and law firms processing substantial contract volumes, as well as non-legal teams that review agreements. Teams working in Microsoft tools or using preset review criteria may find its workflow relevant.
Plans and prices
Starter
For individuals · Task Management · Real-time Collaboration · Customizable Dashboards
Read 1 Oct 2026 · thoughtriver.com
Pro
For startups · Task Management · Real-time Collaboration · Customizable Dashboards
Read 1 Oct 2026 · thoughtriver.com
Entreprise
For companies · Task Management · Real-time Collaboration · Customizable Dashboards
Read 1 Oct 2026 · thoughtriver.com
Professional
For SME legal teams · Under 50 contracts a month · Unlimited Users · Private Database Instance
Read 1 Oct 2026 · thoughtriver.com
Enterprise
For high-volume legal teams · Over 50 contracts a month · Unlimited Users · Private Database Instance
Read 1 Oct 2026 · thoughtriver.com
On the record
- AI training
- Lexible is trained on more than 4,150 lawyer-built concepts.thoughtriver.com · read 1 Oct 2026
- API
- ThoughtRiver provides a public API-first platform following the OpenAPI Specification.thoughtriver.com · read 1 Oct 2026
- Authentication
- Auth0 provides authentication, single sign-on and multifactor authentication, with only user email addresses passed to Auth0.thoughtriver.com · read 1 Oct 2026
- Contract analysis
- Its Lexible LLM flags key contract issues, obligations and risks within minutes.thoughtriver.com · read 1 Oct 2026
- Data protection
- Contract documents and derived data are encrypted at rest with a unique account-specific key and encrypted in transit using TLS1.2.thoughtriver.com · read 1 Oct 2026
- Data residency
- Customer data resides in ThoughtRiver-managed Azure data centers in a single specified region, with no external processors used for customer data.thoughtriver.com · read 1 Oct 2026
- Generative editing
- Generative AI features make contract editing mimic the user’s drafting style and negotiation guidelines.thoughtriver.com · read 1 Oct 2026
- Integrations
- Listed integrations include Microsoft 365, Power BI, HighQ and iManage.thoughtriver.com · read 1 Oct 2026
- Microsoft tools
- The platform works inside Outlook, Word and Teams.thoughtriver.com · read 1 Oct 2026
- Playbooks
- Contracts are reviewed against preset criteria called Playbooks, producing met and unmet provisions and allowing output or redlining.thoughtriver.com · read 1 Oct 2026
- Product purpose
- ThoughtRiver is an AI contract review tool for pre-signature or post-signature contract review.thoughtriver.com · read 1 Oct 2026
- Security certification
- ThoughtRiver states that it is ISO27001 certified, certificate number 21188-ISMS-001.thoughtriver.com · read 1 Oct 2026
- Support browsers
- Supported browsers are the latest stable versions of Chrome, Edge, Firefox and Safari on macOS.support.thoughtriver.com · read 1 Oct 2026
- Target users
- ThoughtRiver focuses on in-house teams and law firms processing over 200 agreements per year, and also supports non-legal teams.thoughtriver.com · read 1 Oct 2026
- Workflow access
- Contracts can be uploaded via email, drag and drop, or the Word add-in.thoughtriver.com · read 1 Oct 2026
