Can I use Relativity aiR and Spellbook together?

Yes, many teams use both tools together for different purposes. Use the Stack Builder section above to combine Relativity aiR and Spellbook with other tools and save your AI toolkit.

Does Relativity aiR or Spellbook have a free plan?

Relativity aiR is a paid tool. Spellbook is a paid tool with a free trial. Always verify current pricing directly with the vendor.

Relativity aiR vs Spellbook

Comprehensive side-by-side comparison — features, pricing, performance, and more.

Updated May 2026

Relativity aiR

Relativity

Empower legal teams to organize data, discover truth, and act with confidence.

0.0(0)

ENTERPRISE

87% data quality

Spellbook

AI tailored for contracts: surgical review, drafting, and research in Word.

0.0(0)

PAID

94% data quality

Trust & Reliability

Relativity aiR

Users:100K-1M

Customers (per vendor):Procopio Cory Hargreaves & Savitch, CSX, Parcels +7

GDPR

HIPAA

Overall Winner: Relativity aiR

7.3/10 vs Spellbook at 6.2/10

Leads in:

Support

Output Quality

Value for Money

AI Comparison Summary

Relativity aiR

7.3

avg score

Spellbook

6.2

avg score

Relativity aiR leads overall — particularly in Customizability and Support & Ecosystem.

Based on 6 dimensions

How scores are calculated

Overall Winner

Relativity aiR

7.3 / 10

Relativity aiR

Best For

Accelerating document review for legal professionals

Protecting privileged information in legal cases

Building robust case strategies with AI assistance

Streamlining data breach response processes

Not Ideal For

Small law practices or solo practitioners with limited budgets

Individuals seeking a free or low-cost AI legal tool

Users needing transparent, self-service pricing models

Spellbook

Best For

Redlining contracts for commercial lawyers

Drafting legal documents efficiently

Researching legal questions with citations

Comparing contracts to industry standards

Not Ideal For

Individuals or small teams seeking transparent, fixed-price plans

Legal professionals who do not use Microsoft Word for contract work

Users needing a general-purpose AI assistant outside of legal documents

* Verdict is based on our algorithmic scoring of publicly available data. Learn about our methodology

Relativity aiR is best for

📊Data & Analytics9.0🔍Research7.0🤖Automation & Agents3.0

Spellbook is best for

📊Data & Analytics9.0🔍Research8.0🤖Automation & Agents5.0

Filter by your use case:

Pros & Cons

Relativity aiR

Pros

Purpose-built AI specifically for legal challenges
Seamlessly integrated into the RelativityOne platform
Robust proactive security measures and continuous monitoring
Legendary 24/7 global support with legal industry expertise
Extensive partner ecosystem for additional value and services
FedRAMP-authorized solution for federal agencies

Cons

Pricing is not publicly disclosed and requires contacting sales
Primarily designed for large corporations and law firms, not individuals
Requires integration with the broader RelativityOne platform
No explicit mention of specific underlying LLMs for Relativity's proprietary AI
No free trial or freemium option for direct product use

Spellbook

Pros

Works directly in Microsoft Word, eliminating context switching
Offers a 7-day free trial to test features
Compliant with major international regulations (SOC 2 Type II, GDPR, HIPAA, CCPA, PIPEDA)
Powered by advanced LLMs like GPT-5 and Opus for legal accuracy
Provides citations for answers to legal questions
Includes custom playbooks for targeted reviews

Cons

Pricing is custom and not transparently listed for all tiers
Requires Microsoft Word for full functionality
Focuses primarily on commercial legal work, not all legal domains
No explicit mention of offline mode

Weighted Score — Adjust What Matters to You

Pick a profile or drag sliders — scores and radar update instantly on the right.

Quick profiles:

Ease of Use5

Output Quality5

Value for Money5

Customizability5

Support & Ecosystem5

Integration Power5

Dimension Comparison

Relativity aiR

7.3

/ 10

Clear winner

Spellbook

6.2

/ 10

Dimension Breakdown

Ease of Use

How easy it is to get started and use daily

Relativity aiR

7.0

Spellbook

7.0

Output Quality

Quality and accuracy of generated results

Relativity aiR

9.0▲ +1.0

Spellbook

8.0

Value for Money

Cost vs. features and output quality

Relativity aiR

7.0▲ +1.0

Spellbook

6.0

Customizability

Calculated

Ability to tailor to specific needs

Relativity aiR

5.0▲ +2.0

Spellbook

3.0

Support & Ecosystem

Documentation, community, and support quality

Relativity aiR

10.0▲ +3.0

Spellbook

7.0

Integration Power

Calculated

Ability to connect with other tools and workflows

Relativity aiR

6.0

Spellbook

6.0

Calculated = derived from verified integration count and API/open-source signals. AI = LLM-assessed from public website content. Methodology

Task Performance

Relativity aiR

Task

Spellbook

9.0

Contract Analysis

9.0

7.0

Legal Research

8.0

6.0

Document Drafting

9.0

2.0

Compliance Monitoring

6.0

8.0

Risk Assessment

8.0

7.0

Case Management

2.0

Regulatory Tracking

3.0

8.0

Due Diligence

7.0

9.0

Clause Extraction

8.0

3.0

Approval Workflows

5.0

* Task scores (1–10) are algorithmically generated from publicly available data.

Data is sourced from public information and vendor websites. It may not always be up-to-date — verify pricing and features directly with the vendor before purchasing.Report inaccuracy

Frequently Asked Questions

Which is better, Relativity aiR or Spellbook?

Both are strong options. Relativity aiR has a rating of 0.0/5 (0 reviews), while Spellbook has a rating of 0.0/5 (0 reviews). The best choice depends on your specific use case, budget, and workflow requirements.

Is Relativity aiR cheaper than Spellbook?

Relativity aiR starts at free (enterprise model). Spellbook starts at free (paid model) with a free trial. Use the Cost Calculator above for a detailed estimate.

What are the main differences between Relativity aiR and Spellbook?

Relativity aiR — "Empower legal teams to organize data, discover truth, and act with confidence.". Spellbook — "AI tailored for contracts: surgical review, drafting, and research in Word.". Key differences include their pricing models, platform support, integrations, and technical capabilities. See the Feature Comparison table above for a complete side-by-side breakdown.

Explore Alternatives

Relativity aiR Alternatives

Tools similar to Relativity aiR

Spellbook Alternatives

Tools similar to Spellbook

Compare More AI Tools

Use our comparison tool to compare up to 5 AI tools side-by-side with AI-powered recommendations.