ThoughtRiver vs Spellbook

ThoughtRiver9.0Visit Spellbook8.8Visit

Higher score ThoughtRiver #3 in AI Contract Review Software 9.0/10 28-day trial Free trial✓ 4 of 4 features Visit ThoughtRiver

vs

Spellbook #4 in AI Contract Review Software 8.8/10 Pricing on request · 7-day trial Free trial✓ 4 of 4 features Visit Spellbook

• ThoughtRiver fits best

  Cost-conscious teams needing full review workflows

• Spellbook fits best

  Word-centered legal teams

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Side by side

Feature	ThoughtRiver 9.0/10 Visit ↗	Spellbook 8.8/10 Visit ↗
At a glance
Editor score	9.0	8.8
Ranking	#3 in AI Contract Review Software	#4 in AI Contract Review Software
Best for	Cost-conscious teams needing full review workflows	Word-centered legal teams
Pricing model	Paid	Paid
Starting price	—	—
Free plan	—	—
Free trial	28 days	7 days
Free trial length	28 days	7 days
Deployment	Cloud, Desktop	Cloud, Desktop, Browser extension
Platforms	Web, Windows	Web, Chrome extension
Support	Docs	Email, Docs
Compliance	ISO 27001, 2FA	SOC 2, GDPR, HIPAA, 2FA
Integrations	7 integrations	7 integrations
Built for	Small business, Mid-market, Enterprise	Solo, Small business, Mid-market, Enterprise
Features ThoughtRiver 4/4 · Spellbook 4/4
Clause comparison	✓	✓
Redline suggestions	✓	✓
Playbook support	✓	✓
API access	✓	✓
Specs
Supported file formats	Not checked yet	DOCX, PDF, DOC, TXT, XLSX, GDOC
Supported languages	Not checked yet	Not checked yet
Our review
Pros	AI analysis covers risks, obligations, and key clauses Configurable playbooks support repeatable contract review Redlines, scoring, collaboration, and reporting are included	Word add-in with AI review, drafting, comments, and tracked-change edits Custom playbooks support preferred terms and fallback positions Associate analyzes and revises multiple documents in one workflow
Cons	There is no free plan The low-priced monthly tiers list generic project-management features Annual tiers use GBP billing and require annual plans	Pricing uses a contact-sales model There is no free plan Its strongest workflow centers on Microsoft Word
Our verdict	ThoughtRiver is an AI contract review platform for in-house legal teams, law firms, and non-legal business teams. Its Lexible AI analyzes contracts for risks, obligations, and key clauses, while configurable playbooks help teams apply… Read the review →	Spellbook is an AI contract drafting and review platform for transactional lawyers, law firms, and in-house legal teams. Its Word add-in reviews agreements for risks, drafting errors, missing protections, and playbook deviations, then… Read the review →

Strengths and trade-offs

• ThoughtRiver — where it wins

  • AI analysis covers risks, obligations, and key clauses
  • Configurable playbooks support repeatable contract review
  • Redlines, scoring, collaboration, and reporting are included

  Where it doesn't

  • There is no free plan
  • The low-priced monthly tiers list generic project-management features
  • Annual tiers use GBP billing and require annual plans

• Spellbook — where it wins

  • Word add-in with AI review, drafting, comments, and tracked-change edits
  • Custom playbooks support preferred terms and fallback positions
  • Associate analyzes and revises multiple documents in one workflow

  Where it doesn't

  • Pricing uses a contact-sales model
  • There is no free plan
  • Its strongest workflow centers on Microsoft Word

• ThoughtRiver9.0/10 · 28-day trial

  A low-entry-cost contract review platform with playbooks, redlines, analytics, and collaboration.

  Visit ThoughtRiverFull verdict →
• Spellbook8.8/10 · Pricing on request · 7-day trial

  A Word-centered contract review suite with playbooks, redlines, and multi-document analysis.

  Visit SpellbookFull verdict →