AI Dispatch
agent · ai-research-agents

CoCounsel vs Spellbook

55 fields both were evaluated on, 25 of them different — including where one discloses something the other does not. Every value links to the document it came from. 30 further fields are disclosed by neither and are listed at the end rather than tabled.

Assurance

FieldCoCounselSpellbook
Audit trail·
audit controls
Plus we have the SSO, MFA, encryption, and audit controls your security team will ask about.
spellbook.com · checked Aug 6, 2026
Explainability·
Answers you can trust, with citations
spellbook.com · checked Aug 6, 2026
Runtime governance·
We have developed and implemented prompting "guardrails," ensuring our GenAI-based products will only produce responses from content drawn from a clearly defined and limited set of verified information, such as our own content databases. This practice restricts the large language model's ability to produce potentially objectionable content broadly sourced from the internet.
www.thomsonreuters.com · checked Aug 1, 2026
Permission scopes·
Retention of user content and prompts is customized to fit customer needs and set up at the organization account level with the support of a Thomson Reuters client manager.
www.thomsonreuters.com · checked Aug 1, 2026
Compliance certifications·
SOC 2 Type II HIPAA GDPR EU AI Act
spellbook.com · checked Aug 6, 2026
Regulatory alignment·
SOC 2 Type II HIPAA GDPR EU AI Act
spellbook.com · checked Aug 6, 2026

Agency

FieldCoCounselSpellbook
Human oversight·
Fiduciary‑Grade AI is designed to support human judgment, not replace it. Professionals remain responsible for the advice they give, the decisions they make, and the work they sign off on.
www.thomsonreuters.com · checked Aug 1, 2026
Goal complexity·
Accelerate legal, tax, audit, compliance, and drafting work with purpose-built AI grounded in authority, transparency, and trust
www.thomsonreuters.com · checked Aug 1, 2026
Action space·
Connected to the tools you already use, including Westlaw, Practical Law, Checkpoint, Microsoft 365, and document management system partners
www.thomsonreuters.com · checked Aug 1, 2026
Operating environment·
Connected to the tools you already use, including Westlaw, Practical Law, Checkpoint, Microsoft 365, and document management system partners
www.thomsonreuters.com · checked Aug 1, 2026

Safety

FieldCoCounselSpellbook
Safety policy·
Zero data retention means our LLM providers never learn from, train on, or store your data. Plus we have the SSO, MFA, encryption, and audit controls your security team will ask about.
spellbook.com · checked Aug 6, 2026
Usage restrictions·
CoCounsel is not a replacement for outside counsel when the stakes are high
www.thomsonreuters.com · checked Aug 1, 2026
Data handling·
Zero data retention means our LLM providers never learn from, train on, or store your data.
spellbook.com · checked Aug 6, 2026

Practicality

FieldCoCounselSpellbook
Availability·
Deployment options·
We process all interactions with OpenAI GPT and Google Gemini in the U.S. We host backup data in separate availability time zones in the U.S.* *Region-based hosting is available in the UK, Australia, and Canada.
www.thomsonreuters.com · checked Aug 1, 2026
Works inside Word and Google Docs, in addition to a standalone product.
Works in Word and Google Docs
spellbook.com · checked Aug 26, 2026
Integrations·
Connected to the tools you already use, including Westlaw, Practical Law, Checkpoint, Microsoft 365, and document management system partners
www.thomsonreuters.com · checked Aug 1, 2026
email, Slack, Salesforce
New contracts come in from email, Slack, Salesforce
spellbook.com · checked Aug 6, 2026
Supported regions·
Region-based hosting is available in the UK, Australia, and Canada.
www.thomsonreuters.com · checked Aug 1, 2026
80+ countries. We comply with GDPR, CCPA, PIPEDA and numerous other privacy standards.
We serve 4,500 teams in 80+ countries. We comply with GDPR, CCPA, PIPEDA and numerous other privacy standards.
spellbook.com · checked Aug 6, 2026

Not in our latest capture. We captured this page again on Sep 16, 2026 and this quote was not there. How we re-check citations

Foundation models

FieldCoCounselSpellbook
Base models·
We process all interactions with OpenAI GPT and Google Gemini in the U.S.
www.thomsonreuters.com · checked Aug 1, 2026
GPT5 and Opus
tuned for commercial legal work, and powered by state-of-the-art LLMs like GPT5 and Opus.
spellbook.com · checked Aug 6, 2026
Model provider·
We process all interactions with OpenAI GPT and Google Gemini in the U.S.
www.thomsonreuters.com · checked Aug 1, 2026

Ecosystem

FieldCoCounselSpellbook
Tool use·
Connected to the tools you already use, including Westlaw, Practical Law, Checkpoint, Microsoft 365, and document management system partners
www.thomsonreuters.com · checked Aug 1, 2026
Multi-agent·
Associate The AI agent for multi-document drafting and review
spellbook.com · checked Aug 6, 2026

Impact

FieldCoCounselSpellbook
User base·
4,500+ legal teams
Trusted by 4,500+ legal teams
spellbook.com · checked Aug 6, 2026

Not in our latest capture. We captured this page again on Sep 16, 2026 and this quote was not there. How we re-check citations

Deployment scale·
We serve 4,500 teams in 80+ countries.
spellbook.com · checked Aug 6, 2026

Not in our latest capture. We captured this page again on Sep 16, 2026 and this quote was not there. How we re-check citations

Target sectors·
Legal professionals Tax professionals Audit professionals Accounting professionals
www.thomsonreuters.com · checked Aug 1, 2026
in-house teams and law firms
Designed for in-house teams and law firms
spellbook.com · checked Aug 6, 2026
High-risk domains·
Fiduciary‑Grade AI is designed for professional work where outputs may influence legal judgments, financial disclosures, regulatory filings, compliance decisions, or client advice.
www.thomsonreuters.com · checked Aug 1, 2026
in-house teams and law firms
Designed for in-house teams and law firms
spellbook.com · checked Aug 6, 2026

Disclosed by neither

Both CoCounsel and Spellbook publish nothing on these 30 fields. That is a finding about the category rather than a difference between them, so it is recorded here instead of as 30 identical table rows. Each is shown with its source check on the individual profiles.

  • Autonomy level
  • Initiative
  • Documented incidents
  • Pricing model
  • Price point
  • Support model
  • Model swappable
  • Open weights
  • Fine-tuning
  • Context window
  • Protocols supported
  • API access
  • Open source
  • Marketplace presence
  • Safety evaluations
  • Red teaming
  • Model or system card
  • Incident reporting
  • Third-party evaluations
  • Insurance available
  • Insurance carriers
  • Coverage limits
  • Indemnification
  • Liability cap
  • Tamper-evident log
  • Outcome-based pricing
  • Settlement mechanism
  • Dispute process
  • SLA terms
  • Evaluation coverage

Questions

How do CoCounsel and Spellbook compare on user base?
CoCounsel: no public information disclosed. Spellbook: 4,500+ legal teams.
How do CoCounsel and Spellbook compare on audit trail?
CoCounsel: no public information disclosed. Spellbook: audit controls.