Agentic Index
Luminance vs Spellbook (2026)
Luminance and Spellbook both automate contract work, and the split is autonomy versus accessibility: Luminance's Legal Grade AI includes an autonomous negotiation agent that reviews, redlines, and negotiates routine contracts end to end against your playbook, while Spellbook is the self serve Word add in, now on contact pricing rather than a published seat price, with the agentic Associate review layer. That verdict is the Agentic Index coverage score, graded from each vendor's own published materials.
Choose Luminance for hands off negotiation of routine paper, Spellbook for affordable in Word drafting and review.
This comparison is published by Agentic Index, an independent agentic AI vendor research platform. Luminance and Spellbook are each graded against the same 14 capability Agentic Index taxonomy, from the vendor's own public materials under the Agentic Index verification standard, alongside 956 researched vendors. No vendor pays for placement and no vendor has reviewed this page. How this evidence is graded
Choose Luminance if
- Autonomous end to end negotiation of routine contracts, agent to agent, is the outcome you want.
- Playbook enforced review at enterprise volume justifies a sales led buy.
- You want the vendor pushing the autonomy frontier in contracts.
Choose Spellbook if
- You want drafting and review inside Microsoft Word today at 99 dollars per user a month.
- Self serve adoption without a sales cycle matters.
- The 4,000+ team install base and maturity reassure you.
| At a glance | Luminance | Spellbook |
|---|---|---|
| Category | Enterprise operations agent | Enterprise operations agent |
| Entry price | Contact for pricing | Contact for pricing |
| Free / trial | — | Seven day free trial; extended trials by demo; free academic access; no free tier |
| Pricing confidence | contact only | contact only |
| Feature | L Luminance |
S Spellbook |
|---|---|---|
| Action & orchestration | ||
|
Integrations & Tool Calling Ability to connect agents to real systems through native integrations, OAuth-authenticated actions, custom tools, APIs, webhooks, or MCP-compatible tools. |
Partial | Partial |
|
Workflow Orchestration Ability to sequence, branch, retry, route, and combine deterministic workflow nodes with autonomous agent steps. |
Full / Explicit | Full / Explicit |
|
Triggers & Channel Coverage How agents wake up and where they work: schedules, webhooks, message events, CRM events, inbox events, chat, email, voice, and collaboration tools. |
Full / Explicit | Partial |
| Knowledge & context | ||
|
Knowledge Grounding & RAG Ability to ground agent behavior in company data through document ingestion, retrieval, external knowledge APIs, semantic search, or RAG layers. |
Full / Explicit | Full / Explicit |
|
Memory & State Persistence Ability to persist context across a run, conversation, workflow, user, team, or longer-term memory layer. |
Full / Explicit | No / Not documented |
| Control & trust | ||
|
Human Oversight & Guardrails Approval steps, consent checkpoints, escalation rules, structured guardrails, policy constraints, and pause/resume controls. |
Full / Explicit | Partial |
|
Security, Identity & Governance RBAC, SSO, auditability, encryption, least-privilege tool access, compliance posture, and data handling policy. |
Full / Explicit | Full / Explicit |
|
Observability & Auditability Traces, logs, execution histories, metrics, audit events, and debugging detail for production agent behavior. |
Full / Explicit | Partial |
|
Deployment & Data Residency Deployment modes and options, including SaaS, dedicated cloud, VPC, on-prem, hybrid, local runtime, and self-hosting. |
Full / Explicit | No / Not documented |
| Solution readiness | ||
|
Prebuilt Agents, Templates & Packs Ready-made workflows, packaged employees, templates, blueprints, industry solutions, and role-specific agents that reduce time-to-value. |
Partial | Partial |
| Platform extensibility | ||
|
Model Flexibility & Routing Ability to work across multiple foundation models, route tasks to different models, or let buyers bring their own providers and keys. |
Partial | Partial |
|
APIs, SDKs & MCP Extensibility Composability layer: stable APIs, SDKs, MCP tool consumption/serving, custom tools, and integration into internal systems. |
Unknown / Unspecified | No / Not documented |
|
Testing, Debugging & Optimization Testing, debugging, scoring, retries, fallbacks, quality gates, and optimization loops for improving agent workflows before and after deployment. |
No / Not documented | No / Not documented |
| Specialist automation | ||
|
Browser & Computer Use Browser, desktop, or remote/local computer control for workflows that cannot be handled through stable APIs alone. |
No / Not documented | No / Not documented |
Pricing snapshot
Sourced from the Index pricing dataset · open each vendor's profile for full detail.
| Pricing | L Luminance |
S Spellbook |
|---|---|---|
|
Entry price Lowest public entry point |
Contact for pricing | Contact for pricing |
|
Pricing confidence How public the numbers are |
Contact only | Contact only |
|
Billing Primary billing axis |
— | seats |
|
Variable cost Workload / overage exposure |
Medium variable cost | Low variable cost |
|
Free tier / trial Try before you buy |
No free tier
|
No free tierTrial
|
|
Buying motion Self-serve vs sales call |
Sales call | Sales call |
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