goHeather vs Spellbook
Both draft, review and redline contracts with AI. The real differences are who each one is built for and where the work happens.
Spellbook and goHeather both review contracts, draft new ones and write redlines with large language models. Spellbook offers add-ins for Microsoft Word and Google Docs, a web agent called Associate with its own document editor, and ACM, a contract management product it announced as generally available on October 7, 2026. goHeather is a web workspace where contracts, playbooks, drafts and chats sit together, with its own Word-style editor and a Microsoft Word add-in. Both work in Word. The difference is where the rest of your contract work lives.
$400
a month for Starter, with every feature and unlimited use
7 days
free trial, no credit card needed
6
current AI models from OpenAI, Anthropic and Meta
20,000+
businesses trust goHeather
goHeather vs Spellbook at a glance
| Compared | goHeather | |
|---|---|---|
| Where it runs | A web app with its own Word-style editor, and a Microsoft Word add-in. Work with Word, PDF and scanned documents in most languages, keep several documents in one chat, and connect other systems through a REST API and webhooks. | Add-ins for Microsoft Word and Google Docs (Review, Playbooks and Ask in Google Docs since July 2026). Associate runs as a web application with its own document editor. Integrations listed for Slack, iManage, OneDrive, Dropbox, SharePoint and Google Drive. |
| Contract review against your own standards | Yes. One click starts a review: goHeather identifies both parties, your side and the governing law, and you choose how deep it goes, from deal-breakers only to every issue. It runs a standard review and checks the contract against your playbook, then lists each finding as High, Medium or Low risk with the original clause, a suggested redline and a plain-English explanation. Apply, dismiss or flag each finding, or add it to your playbook. Later negotiation rounds can be reviewed redline-only, and Legal Summary, Deal Abstract and Negotiation memos export to Word. | Yes. Review "scans for client risks, drafting errors and other issues" and gives "instant redline and comment suggestions," which you approve before they are applied. A Review Depth toggle offers Light, Standard and Heavy. Playbooks "save and reuse specific instructions for how you want Spellbook to review," with version history and rule-conflict detection. Comprehensive Reviews (September 2026) run a playbook, a risk check and a Proofread pass together. Compare to Market checks clauses against industry standards. |
| Who builds the playbook, and from what | You do. Generate a playbook from a contract you already use in about a minute, build one from scratch, or start from a sample, then edit it by describing the change. Each rule sets your position, with fallback positions, unacceptable deviations and guidance notes, and any finding can become a new rule. Playbooks can be private or shared with your team. On the Team plan, goHeather builds your playbooks for you, and on every plan free one-on-one sessions with a lawyer help you set them up. | Your team, or a starting set of 12 common rule sets. You can build your own "from scratch, or using AI," and from documents you upload Spellbook can generate fallback positions, risk levels and reviewer notes, with up to three fallback positions per rule. |
| Drafting a full document from scratch | Yes. Describe the document and goHeather asks a few questions (or makes the call for you), has you approve an outline, then drafts each section into an editable Word document and flags any section that needs a second look. Anything you didn't supply stays a labeled blank instead of being made up. It can work from your own templates and reference files, search the web while drafting, and produce memos, letters and tables as Word, PDF or Excel files. | Spellbook says it can "create new clauses and documents," drawing on a precedent library and a clause library you upload to. It detects contract type, jurisdiction, party details and writing style from your document and matches them. |
| Edits delivered as tracked changes | Yes. Every edit arrives as a tracked change under your name, with a short comment explaining it to the other side, in the browser editor or in Word. Accept or reject changes one at a time or all at once, or just tell goHeather what to change. Each document keeps its full version history, and you can compare versions. | Yes. Edits appear in Word under your name and you "review, edit, and accept multiple changes in one go." |
| Where signed contracts live | In goHeather's contract list, with start, end and notice-to-terminate dates pulled from each contract automatically, obligation tracking, version history, and every review and chat about that contract. Documents can be sent for e-signature from goHeather. | ACM's "Intelligent Repository" receives signed contracts and notifies you of upcoming renewals. ACM also covers intake from Gmail, Outlook and Slack, routing, approvals and a deal workspace that tracks versions. |
| Choice of AI model | Yes. Pick the model for each chat from six current models from OpenAI, Anthropic and Meta, including GPT-6 Astra and Claude Opus 5.5, with unlimited use on every plan. If a provider is busy, goHeather switches to another model automatically. You can also train your own AI model on your organization's standards. | Spellbook's security page names OpenAI and Anthropic, with zero data retention agreements, and its site says Spellbook automatically chooses which AI model to use. |
| Agentic review(the AI plans and runs a multi-step review on its own, rather than answering one prompt at a time) | In beta. An agentic review mode runs reviews in chat. With email intake, you forward an NDA or any other contract and get it back in your inbox reviewed against your playbook, redlined with tracked changes, with a short memo. | Yes. Associate is "the AI agent for transactional law," which "breaks goals down into tasks and executes them" across document sets. ACM runs intake, triage and a first-pass review automatically and can auto-approve routine contracts that pass your playbook, while lawyers stay in control of judgment calls and final decisions. |
| Contract lifecycle management, CLM(a repository of signed contracts with statuses, dates, search and renewals) | In beta. The Vault keeps a team's contracts, amendments, memos and email in one place, filed by AI into folders with per-folder access. Each contract shows its type, counterparty, key dates and status (Template, Draft, Out for signature, Signed, Expired, Terminated), with a Deadlines view, renewal reminders and search across contracts, reviews, playbooks and chats. | Yes. Spellbook ACM, generally available since October 7, 2026, is described as "the first AI system to power contracts from end to end" and "the CLM replacement for modern legal teams," covering intake to renewal. |
| Pricing | Starter is $400 a month, or $2,400 a year, for one seat. Team is custom-priced for two or more seats. Every plan includes every feature and unlimited use. | Quote-based, priced per team member. Book a demo. |
| Free trial | Yes. 7 days with every feature, no credit card required. | Yes, 7 days. Extended trials may be available. |
| Security claims(as listed on each vendor's site) | Customer data is never used to train AI models, and AI providers keep request logs only for abuse monitoring, for up to 30 days. Data is hosted in the US on AWS and encrypted in transit (TLS 1.3) and at rest, with private file uploads and single sign-on (SSO). See goheather.io/security. | SOC 2 Type II, HIPAA (BAA available), GDPR, CCPA, PIPEDA and EU AI Act compliance listed. Zero data retention agreements with OpenAI and Anthropic. SSO through Microsoft accounts. Data stored and processed in Canada and the US on AWS. |
| Built for | Business teams that handle contracts and everyday legal work, such as sales, procurement, HR and finance, plus in-house counsel and law firms. Everything a legal team does except litigation, from one user to enterprise teams on a custom agreement. | In-house legal teams and law firms. |
A closer look at goHeather as a Spellbook alternative
Legal AI designed for the business teams that handle contracts every day, and the lawyers who work with them.
Every finding, ranked and explained
One click starts a review. Each finding comes with the original clause, a suggested redline and a plain-English explanation, so anyone on the team can decide what to do.
Your positions, applied every time
Generate a playbook from a contract you already use, and every review checks the other side's paper against your positions, fallbacks and walk-aways. On the Team plan, goHeather builds your playbooks for you.
A first draft from a description
Answer a few questions, approve the outline and get an editable Word document, with anything you didn't supply left as a labeled blank instead of made up.
How goHeather and Spellbook differ
Who it is built for
Spellbook is built for in-house legal teams and law firms. goHeather is designed to be used by non-lawyers and lawyers alike: the business teams that handle contracts every day, and the general counsel who work with them.
Where the work happens
Spellbook brings review, drafting and redlining into the document you have open in Word or Google Docs, and Associate adds a web app for multi-document jobs. goHeather gives you a workspace where every contract keeps its reviews, versions, chats and dates together, with a Word-style editor in the browser and a Word add-in for when you'd rather stay in Word.
Playbooks
Both let a team write its standards down and apply them to every contract, with fallback positions and AI help to build them. In goHeather each rule also records the deviations you never accept and guidance notes, a playbook can be generated from one of your contracts in about a minute, any finding becomes a new rule in one click, and a lawyer helps you set it up at no extra cost. Spellbook offers 12 common rule sets to start from, version history and detection of conflicting rules.
Benchmarks and standards
Spellbook's Compare to Market feature checks clauses against industry standards. goHeather is built on the latest tools from the leading foundation model providers and checks every clause against your own playbook.
Agents and contract management
Spellbook's Associate is an agent for multi-document tasks, and ACM, generally available since October 2026, runs intake, triage, first-pass review and filing, with lawyers in control of judgment calls and final decisions. goHeather tracks signed contracts in its contract list with extracted dates and obligation tracking, and sends documents for e-signature; its agentic review, email intake and Vault are in beta.
Model choice
goHeather lets you pick the model for each chat from six current models across OpenAI, Anthropic and Meta, with unlimited use on every plan. Spellbook names OpenAI and Anthropic and chooses the model automatically.
Pricing
goHeather publishes its price: $400 a month for Starter, with every feature and unlimited use. Spellbook prices per team member on a quote.
What business teams say about goHeather
“Easy to use, quick, credible and efficient!”
Andrea Anders Inc. “Cool stuff, I like the comments I’m getting. It’s super helpful.”
MattHealthcare Technology Entrepreneur “I enjoyed using the platform, I will certainly use it again when I have other leases to review.”
Carlos DeOliveiraPresident & CEO, Wine & Spirits Retail Marketing Inc.
goHeather or Spellbook: which fits your team?
When Spellbook is the better fit
Your team lives in Word and does not want another workspace. You want clause benchmarking against industry standards as part of review. You want an agent that works across a whole document set today, or an intake-to-renewal system that is already generally available. You review in Google Docs. You already use iManage, SharePoint or similar and want the tool connected to it.
When goHeather is the better fit
Your contracts are handled by people who aren't lawyers, such as sales, procurement, HR and finance teams, or by a general counsel working with them. Every finding and every edit comes with a plain-English explanation, so anyone on the team can act on it. You want one workspace where contracts, playbooks, drafts and chats sit together, with a Word add-in as well. You want playbooks generated from your own contracts in a minute that grow with every review. You want to choose the AI model, or see a published price before a demo.
How to test goHeather and Spellbook side by side
Take three contracts your team reviews every month. Run the same three through each trial with the same playbook rules. Compare what each flagged, what each missed, and how long it took to get from upload to a redline you would send.
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Sources: spellbook.com, spellbook.com/features/review, spellbook.com/features/draft, spellbook.com/associate, spellbook.com/acm, spellbook.com/integrations, spellbook.com/security, spellbook.com/pricing, spellbook.com/learn/best-legal-ai-agent, and Spellbook blog posts "Autonomous Contract Management Is Now Generally Available" (October 7, 2026), "Introducing Comprehensive Reviews" (September 17, 2026), "Introducing Spellbook for Google Docs" (July 23, 2026), "Spellbook's June Product Spotlight" (July 9, 2026), "Spellbook's March Product Spotlight" (April 14, 2026), "Faster, Smarter Playbooks" (June 5, 2025) and the January 2025 Playbooks launch post, checked October 8, 2026. goHeather details from the goHeather app, its release notes and goheather.io/pricing on the same date.
goHeather is legal AI software, not a law firm, and does not give legal advice.