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Robin AI vs Spellbook

Two fact sheets from our own research, side by side — pricing, platforms, API access and status re-checked by us rather than quoted from the vendors.

The short answer

Best fit
Robin AI: In-house legal teams at mid-size and large companies reviewing high volumes of third-party paper · Spellbook: Small and mid-size firms and in-house teams doing high contract volume in Word
Platforms
Robin AI: Web · Spellbook: Windows, macOS, Web
Trust score
About even — Robin AI 90, Spellbook 90
Status
Both up at our last check (Sep 6, 2026)

From our own records as of each tool's last check. Anything we have not confirmed is left out rather than guessed. How we verify

Robin AILegal intelligence platform that reviews, analyses and answers questions about contracts for in-house legal teamsSpellbookContract drafting and redlining inside Microsoft Word

Side by side

FactRobin AISpellbook
CategoryContract Analysis & ReviewContract Analysis & Review
Pricing modelContactContact
Trust score90 / 10090 / 100
PlatformsWebWindows, macOS, Web
CompanyRobin AI LimitedSpellbook
Launched20192018
Last verifiedSep 6, 2026Sep 6, 2026

What our research says

Robin AI

Robin AI suits an in-house legal team that wants contract review and document Q&A from a vendor that employs lawyers and signs enterprise paper, with the London-New York-Singapore footprint to match. It is not a self-serve product: no price, no trial you can start alone, and the terms make clear that the output is software, not advice. Lawyers who draft in Word all day and want an add-in with a visible price will find Spellbook or Luminance easier to evaluate.

Pros

  • Contract review and analysis combined with chat over documents in shared, searchable threads
  • Workspaces hold documents, conversations and tasks for a whole legal team
  • Backed by Google, Temasek, PayPal and others, with offices on three continents
  • English-law terms from a registered UK company, straightforward for European procurement

Cons

  • No public pricing or self-serve trial; every evaluation goes through sales
  • No public API found and no Word add-in described on the current site
  • The terms are internally inconsistent in places (arbitration seat listed as London, 'England, United States')
  • Product positioning shifted to a 'Legal Intelligence Platform' in 2025, so older reviews describe a different product

Spellbook

Spellbook wins on the thing that decides legal-tech adoption: it lives in Word, where the lawyers already are, instead of asking them to move. The cost of that is a sales process and a price you cannot check before you engage.

Pros

  • Native Word add-in means near-zero behaviour change for the people who have to use it
  • Benchmarks against both market norms and the firm's own precedent, not just generic templates
  • Well capitalised: $50M Series B led by Khosla in October 2025 plus $40M debt in March 2026
  • 7-day free trial is available without going through procurement

Cons

  • No published pricing at any tier, so budgeting requires a sales conversation
  • No API, which blocks integration into an existing contract lifecycle system
  • Priced per seat, so cost scales with headcount rather than contract volume
  • The vendor is now actively acquiring competitors, so the product surface may shift

Which one fits

Choose Robin AI if you need

  • In-house legal teams at mid-size and large companies reviewing high volumes of third-party paper
  • Companies that want contract analysis plus access to a vendor with its own legal professionals
  • Teams spread across the UK, US and Asia that want one workspace for documents and questions

Choose Spellbook if you need

  • Small and mid-size firms and in-house teams doing high contract volume in Word
  • Practices with an existing precedent bank worth benchmarking drafts against
  • Teams that want redlining suggestions in the document rather than in a separate portal

More comparisons

All Robin AI alternatives →All Spellbook alternatives →Browse all Contract Analysis & Review →