Ivo and Spellbook are both AI contract tools that live inside Microsoft Word, and both sit well below the rollout and price of an enterprise platform like Harvey or Legora. The resemblance stops at the surface. Spellbook leans generation — it drafts from a blank page, proposes fallback clauses, and flags missing terms across thousands of contract types. Ivo leans review — it redlines a counterparty’s draft against your negotiation playbook and against market benchmarks, then answers portfolio questions across the agreements you have already signed. The routing question is which end of the workflow is your constraint: producing first-pass paper, or reviewing inbound paper against a standard at volume.
Where Ivo wins
Playbook-enforced review and redline. Ivo Review checks a draft against the way your company actually negotiates — not just “this is an indemnity clause” but “this indemnity is off-market, here is your fallback.” It proposes the tracked change a reviewer would have written, so a junior lawyer applies the same standard as a senior one. Spellbook reviews too, but its review is anchored to general legal training rather than a fixed, enforced playbook.
Portfolio intelligence over the signed library. Ivo Intelligence reads your existing contracts, links amendments and restatements back to their base agreement, and turns “which of our MSAs cap liability below 12 months of fees?” into a query rather than a quarter-long tagging project. Spellbook has no equivalent portfolio-analysis layer — it acts on the document in front of you, not the repository behind you.
Enterprise and upper-mid-market fit. Ivo’s named customers — Uber, Shopify, IBM, Canva, plus Pinterest and Reddit — are companies that review the same agreement types (NDAs, MSAs, DPAs, order forms) over and over. A $55M Series B in January 2026 at a reported ~$530M valuation, on ARR Ivo says grew sixfold in nine months, signals it is built for that buyer rather than the solo lawyer.
Where Spellbook wins
Generation from a blank page. Point Spellbook at a contract type and it produces a draft, suggests fallbacks, and benchmarks against 2,300+ contract types from general legal training — no firm precedent library required. On a novel agreement your team has never seen, it still produces reasonable language. Ivo’s value assumes a draft already exists and a playbook to judge it against.
A price you can evaluate without a sales call. Spellbook publishes working bands — roughly $99/user/month solo, ~$149 team — so a small firm gets a number before a procurement cycle. Ivo publishes nothing: it is custom, enterprise, and quoted through a sales process, which means you cannot model ROI before a demo.
Time-to-value for solo and small firms. A sub-20-lawyer team can be live with Spellbook in an afternoon, with per-seat economics that work at that scale. Ivo is scoped to teams with the contract volume — and the playbook — to justify enforced review; below that, you pay for benchmarking you won’t fully use.
Broad drafting and negotiation coverage, plus an agent. Spellbook spans drafting, review, and negotiation, and Spellbook Associate runs multi-document work from a single instruction. Ivo’s center of gravity is narrower by design: review, redline, and portfolio analysis.
Pricing reality
Spellbook is the more knowable of the two, though it de-published exact figures after a late-2025 increase. The bands third-party trackers report: ~$99/user/month solo (capped at 50 contracts/month), ~$149 team, and ~$199–350/user/month enterprise with a 10-seat minimum and a 6-month commitment. At 10 seats, enterprise lands roughly $24K–42K/year before discounts. Ivo gives you no public anchor at all — budget for an annual enterprise contract and a procurement cycle, and get the per-seat price, seat minimum, and renewal-year uplift in writing. Note the asymmetry of information: you are negotiating against a vendor that benchmarks deals daily and you don’t, so bring at least one named-alternative quote to the table.
Both vendors lean on accuracy numbers that are vendor-reported, not independently audited — Ivo’s 97% CUAD-benchmark figure and “up to 75%” review-time reduction among them. Treat them as marketing until a paid pilot on your own live agreements proves them out.
Implementation effort
Both install as Word add-ins and skip the multi-month rollout of a CLM. Spellbook’s ramp is uploading your playbooks so it compares against your standards rather than its defaults — a team is productive the same day. Ivo’s ramp is heavier but buys more: you build the playbook it enforces and connect the contract library Ivo Intelligence reads, so its value scales with what you invest up front. Neither replaces your system of record — keep a CLM like Ironclad for storage, approval routing, and renewals.
Verdict
Pick Ivo when your bottleneck is review-and-redline throughput on repeatable counterparty paper, you have (or will build) a negotiation playbook to enforce, and you want portfolio intelligence over the contracts you have already signed. It is the in-house, review-first, enterprise pick.
Pick Spellbook when your bottleneck is producing drafts and redlines — clause generation, missing-term flags, and first-pass markup, especially on contract types where you have no precedent — or when you want a knowable price without a procurement cycle. It is the drafting-first, fast-to-value pick that also fits solo and small firms.
Pick neither if your need runs past contract drafting and review into legal research, litigation prep, or broad advisory and compliance work. Harvey and Legora cover that at materially higher cost; GC AI is the broad in-house copilot with a published per-seat floor if you want contracts plus research and employment coverage in one surface.
The default for an in-house team buying one tool first: name where the queue backs up. If reviewing inbound paper against your standard is what costs you time, Ivo. If producing the first draft is, Spellbook. Most teams have both problems — start with the one currently costing you a deal or a late night, and add the second once the first is handled.
Ivo and Spellbook are both AI contract tools that live inside Microsoft Word, and both sit well below the rollout and price of an enterprise platform like Harvey or Legora. The resemblance stops at the surface. Spellbook leans generation — it drafts from a blank page, proposes fallback clauses, and flags missing terms across thousands of contract types. Ivo leans review — it redlines a counterparty’s draft against your negotiation playbook and against market benchmarks, then answers portfolio questions across the agreements you have already signed. The routing question is which end of the workflow is your constraint: producing first-pass paper, or reviewing inbound paper against a standard at volume.
Where Ivo wins
Playbook-enforced review and redline. Ivo Review checks a draft against the way your company actually negotiates — not just “this is an indemnity clause” but “this indemnity is off-market, here is your fallback.” It proposes the tracked change a reviewer would have written, so a junior lawyer applies the same standard as a senior one. Spellbook reviews too, but its review is anchored to general legal training rather than a fixed, enforced playbook.
Portfolio intelligence over the signed library. Ivo Intelligence reads your existing contracts, links amendments and restatements back to their base agreement, and turns “which of our MSAs cap liability below 12 months of fees?” into a query rather than a quarter-long tagging project. Spellbook has no equivalent portfolio-analysis layer — it acts on the document in front of you, not the repository behind you.
Enterprise and upper-mid-market fit. Ivo’s named customers — Uber, Shopify, IBM, Canva, plus Pinterest and Reddit — are companies that review the same agreement types (NDAs, MSAs, DPAs, order forms) over and over. A $55M Series B in January 2026 at a reported ~$530M valuation, on ARR Ivo says grew sixfold in nine months, signals it is built for that buyer rather than the solo lawyer.
Where Spellbook wins
Generation from a blank page. Point Spellbook at a contract type and it produces a draft, suggests fallbacks, and benchmarks against 2,300+ contract types from general legal training — no firm precedent library required. On a novel agreement your team has never seen, it still produces reasonable language. Ivo’s value assumes a draft already exists and a playbook to judge it against.
A price you can evaluate without a sales call. Spellbook publishes working bands — roughly $99/user/month solo, ~$149 team — so a small firm gets a number before a procurement cycle. Ivo publishes nothing: it is custom, enterprise, and quoted through a sales process, which means you cannot model ROI before a demo.
Time-to-value for solo and small firms. A sub-20-lawyer team can be live with Spellbook in an afternoon, with per-seat economics that work at that scale. Ivo is scoped to teams with the contract volume — and the playbook — to justify enforced review; below that, you pay for benchmarking you won’t fully use.
Broad drafting and negotiation coverage, plus an agent. Spellbook spans drafting, review, and negotiation, and Spellbook Associate runs multi-document work from a single instruction. Ivo’s center of gravity is narrower by design: review, redline, and portfolio analysis.
Pricing reality
Spellbook is the more knowable of the two, though it de-published exact figures after a late-2025 increase. The bands third-party trackers report: ~$99/user/month solo (capped at 50 contracts/month), ~$149 team, and ~$199–350/user/month enterprise with a 10-seat minimum and a 6-month commitment. At 10 seats, enterprise lands roughly $24K–42K/year before discounts. Ivo gives you no public anchor at all — budget for an annual enterprise contract and a procurement cycle, and get the per-seat price, seat minimum, and renewal-year uplift in writing. Note the asymmetry of information: you are negotiating against a vendor that benchmarks deals daily and you don’t, so bring at least one named-alternative quote to the table.
Both vendors lean on accuracy numbers that are vendor-reported, not independently audited — Ivo’s 97% CUAD-benchmark figure and “up to 75%” review-time reduction among them. Treat them as marketing until a paid pilot on your own live agreements proves them out.
Implementation effort
Both install as Word add-ins and skip the multi-month rollout of a CLM. Spellbook’s ramp is uploading your playbooks so it compares against your standards rather than its defaults — a team is productive the same day. Ivo’s ramp is heavier but buys more: you build the playbook it enforces and connect the contract library Ivo Intelligence reads, so its value scales with what you invest up front. Neither replaces your system of record — keep a CLM like Ironclad for storage, approval routing, and renewals.
Verdict
Pick Ivo when your bottleneck is review-and-redline throughput on repeatable counterparty paper, you have (or will build) a negotiation playbook to enforce, and you want portfolio intelligence over the contracts you have already signed. It is the in-house, review-first, enterprise pick.
Pick Spellbook when your bottleneck is producing drafts and redlines — clause generation, missing-term flags, and first-pass markup, especially on contract types where you have no precedent — or when you want a knowable price without a procurement cycle. It is the drafting-first, fast-to-value pick that also fits solo and small firms.
Pick neither if your need runs past contract drafting and review into legal research, litigation prep, or broad advisory and compliance work. Harvey and Legora cover that at materially higher cost; GC AI is the broad in-house copilot with a published per-seat floor if you want contracts plus research and employment coverage in one surface.
The default for an in-house team buying one tool first: name where the queue backs up. If reviewing inbound paper against your standard is what costs you time, Ivo. If producing the first draft is, Spellbook. Most teams have both problems — start with the one currently costing you a deal or a late night, and add the second once the first is handled.