Definely vs Spellbook
A side-by-side comparison of Definely and Spellbook, two Legal tools, drawn from Ignaite's continuously-verified listings.
Compared from listings verified as of
At a glance
| Attribute | Definely | Spellbook |
|---|---|---|
| Category | Legal | Legal |
| Pricing | PAID | PAID |
| License | Proprietary | Proprietary |
| Deployment | Cloud | Cloud |
| Platforms | Web | Web |
| Model support (differs) | — | Multi-model |
| Vendor (differs) | Definely | Rally Legal (Spellbook) |
| Capabilities (differs) |
|
|
The honest brief
Definely
Goes deep on the unglamorous drafting work — definitions, cross-references, proofing — inside Word rather than bolting a chat panel onto legal review.
- Native Microsoft Word workflow
- Used by 150+ law firms
- iManage + NetDocuments integrations
- SOC 2 and ISO 27001 certified
- No public pricing — demo first
- Tied to the Word workflow
- Focused on pre-execution drafting
Spellbook
Runs entirely as a Microsoft Word add-in, so drafting and redlining happen in the document lawyers already work in.
- Native Microsoft Word add-in
- Clause benchmarking + playbook review
- Early generative-AI legal tool (2022)
- Multi-model (GPT, Claude)
- Paid-only, no free tier
- Tied to the Word workflow
- Less suited to litigation/research
When to pick which
Both cover Contract review and Contract drafting.
Pick Definely if you need Unified search and Editing / grammar.
- Unified search (secondary capability)
- Editing / grammar (secondary capability)
Pick Spellbook if you need Cited answers and Legal research.
- Cited answers (secondary capability)
- Legal research (secondary capability)
Spellbook leans on Contract drafting as a headline capability; Definely treats it as secondary.
- Contract drafting (primary capability)