GC AI vs Sandstone: Routing the Work, or Doing It?
Sandstone organizes the requests coming at your team. GC AI answers them.
Where high-performing legal teams learn AI
Both are built for in-house. They solve different halves of the problem.
Sandstone positions itself as the operating system for in-house legal: intake, context, and execution across 50+ integrations. GC AI is the analytical desk where the legal work actually gets done.
What is GC AI?
Legal AI built for the lawyer's own work
Contract review and redlining, research with primary-law citations, regulatory monitoring, employment, privacy, drafting, and board prep. A 20,000-line legal system prompt tuned for in-house practice.
Sandstone: An operating layer for in-house legal. Intake, triage, matter routing, context mapping, and reporting across the business stack.
Where does the value land?
The queue versus the answer
Sandstone makes sure the right request reaches the right lawyer with the surrounding context attached. GC AI is what that lawyer opens next to produce the redline, the research memo, or the read for the board.
Sandstone: Its agents handle intake, triage, first-pass redlining, and drafting against your playbooks, standing up in minutes rather than months.
What can you verify today?
Published pricing and a real free trial
$500 per seat per month, published, with a 14-day free trial and no credit card. Test it on your own contracts and research questions before any purchase conversation.
Sandstone: Pricing is not published as of August 2026. Access begins with a demo request.
Compare GC AI vs Sandstone
Both platforms are built for in-house legal teams and both ship AI agents. Sandstone is strongest at getting work organized and routed. GC AI is strongest at the legal analysis that comes after.
| Feature | Sandstone | |
|---|---|---|
| Category | Legal AI platform for in-house counsel | AI-native operating layer for in-house legal teams |
| Primary job | Do the legal work: review, research, draft, advise | Capture, triage, route, and report on legal work |
| Founded | 2023, San Mateo, California, by Cecilia Ziniti, 3x former General Counsel | Founded by Nick Fleisher and Jarryd Strydom; $10M seed led by Sequoia, $30M Series A led by Lightspeed in June 2026 |
| Core capabilities | Easy Prompt, Exact Quote, Playbooks, Research, Skill Library, Projects, Chat2 in Word | Knowledge management, intake and triage, agentic workflows, context mapping, natural-language reporting |
| Legal research | Research: real-time primary law from authoritative databases and government sources with citations | Multi-source citations within agentic workflows |
| Contract review | Playbooks pre-built for NDAs, DPAs, SaaS MSAs, and commercial MSAs, extensible with your positions | First-pass redlining, comment replies, change accept/reject, drafting from templates |
| Citation | Exact Quote: character-level citation back to the source document | Multi-source citations |
| Integrations | Microsoft Word add-in synced with the web workspace | 50+ integrations including Salesforce, Slack, Teams, Jira, ServiceNow, SharePoint, Google Drive, Ironclad |
| Matter memory | Projects hold parties, negotiated positions, prior guidance, and documents per matter, user-controlled | Context mapping across counterparty history, conversations, relationships, and business signals |
| Reporting | Not a reporting platform | Natural-language reporting to track, benchmark, and report on legal work |
| Pricing | $500 per seat per month, published; no seat minimum | Not published as of August 2026 |
| Free trial | 14 days, no credit card | None published; access begins with a demo |
| Education | GC AI Classes: free, CLE-certified (California), taught by former GCs; 6,000+ lawyers trained | Not published |
| Security | SOC 2 Type II, SOC 3, GDPR, ZDR with OpenAI and Anthropic, AES-256 | SOC 2 certified, AES-256 at rest, TLS 1.3 in transit, SAML SSO, US data residency, no training on customer data |

The redline is where the judgment lives
Routing a contract to the right lawyer with the counterparty history attached is genuinely useful. The work still starts when the lawyer opens the document.
GC AI Playbooks ship pre-built for NDAs, DPAs, SaaS MSAs, and commercial purchase MSAs, and your team extends them with your own positions. Your Playbook flags the issues that matter to your business, not a generic checklist.
At the 2026 GC AI Summit, Taylor Robertson ran GC AI's SaaS MSA Playbook against a live $1M Atlassian agreement. In one click it flagged standard deviations and a unilateral modification clause that fell outside the playbook's rules, catching more than a checklist would.

Most in-house questions are not requests in a queue
An intake layer is measured on the work that arrives through it. A lot of the in-house week never does: the new state privacy law you have to read on, the employment classification question raised in a hallway, the regulatory exposure the board asks about on a Thursday.
GC AI Research runs multi-agent searches across authoritative legal databases and government sources and returns current case law, statutes, and regulations with citations you can click through. The Skill Library ships ready-to-use workflows for NDAs, DPAs, regulatory summaries, and board consents.
That is the half of the job that starts after the request is triaged, and it is the half GC AI was built for.

Character-level citation, because you are the last reviewer
When guidance leaves your desk it goes to the VP of Sales, the CFO, or the board. Nobody checks it first, so every statement has to be traceable in seconds.
Exact Quote gives you character-level citation. Every output links to the precise text in the source document, beyond a page number or a paragraph summary. Click the citation, see the source, verify, send.
Customers reported a 21% accuracy advantage over generalist AI. On GC AI's In-House Legal Bench, published in May 2026, GC AI scored 86.8% across 100 in-house legal tasks graded against 1,200+ attorney-developed criteria.

Matter memory you control, scoped to the matter
Projects give you persistent matter memory: parties, negotiated positions, prior guidance, and deal documents kept together so you never re-brief a matter from scratch. Custom Company Profile tailors GC AI to your templates, writing style, and legal standards.
Both are fully user-controlled. You decide what GC AI remembers and where it applies. Context from one matter stays in that matter.
GC AI only accesses documents you explicitly upload to Files or Projects. If your security team is weighing a platform that connects broadly across the business stack, that narrower surface area is a real difference worth putting in front of them.

The whole platform runs inside Microsoft Word
GC AI for Word includes Chat2, saved prompts, Easy Prompt, and Projects. Pull primary law into a redline with Chat2. Run a Playbook against an incoming NDA. Carry matter memory from last week's draft into this week's negotiation. All inside the document, with no context switch.
What you start in the web workspace pulls into Word with one click, and the two stay synced.
Sandstone integrates across 50+ systems including Salesforce, Slack, Jira, ServiceNow, and Ironclad, which is the right shape for capturing requests where they originate. GC AI goes narrow and deep on the surface where the drafting actually happens.

We teach the lawyers doing the work right now
Buying a platform is the easy part. Getting a department to use it consistently is where the value compounds.
GC AI Classes are free and CLE-certified (California), taught by former general counsels, covering prompt engineering for legal work, AI-assisted contract review, and building internal AI adoption playbooks. More than 6,000 legal professionals have completed them, with instructor ratings averaging 4.7 to 4.9 stars.
Whichever platform you shortlist, ask what education comes with it beyond product documentation.
Watch a demo of GC AI by Cecilia Ziniti, CEO, Founder and 3X GC
What in-house teams say about GC AI

The GC AI Word plugin has transformed my legal workflow, allowing me to draft and review documents in a fraction of the time it used to take. What used to be hours of tedious contract review now takes minutes, with the AI instantly flagging potential issues and suggesting precise language improvements that align with our company standards and preferences. The seamless integration with Word means I can leverage powerful legal AI without disrupting my existing workflow, making it an indispensable tool for our legal team.
Katelyn CanningDirector and Head of Legal Company
GC AI's Word Add-in is in a class of its own compared to other legal AI tools I have evaluated. Its ability to produce a first-pass redline of an agreement against our own templates has significantly reduced the time required to review non-standard contracts. Furthermore, GC AI's capacity to suggest market-standard compromises and provide clear, concise explanations for edits accelerates negotiations and fosters a more collaborative process between parties.

GC AI for Word has become an integral part of my workflow. Its integration into the online portal ensures seamless communication between the two platforms and helps ensure we're communicating with all stakeholders accurately and efficiently. Most importantly, I appreciate that GC AI continues to listen to their users and improves the software continuously.
Sarah BrownleeContract SpecialistToday's victory: my board chair asked me a long time ago for an index of all board resolutions. I can only use the word “collaborate” to describe how I first worked out with GC AI how we were going to do this. I was also mindful of the possibility that GC AI might not be able to remember all of the content since I had about 50 PDF docs to summarize and put into a table. We first worked out what the table would look like, then I uploaded each one and it produced the output in table format for that one doc. And asked me for the next doc. After I uploaded about 10 docs one by one, I asked it to consolidate all the entries into a single table and put it in reverse chron order. It did. I praised it and then fed the rest of the docs one by one. At the end, it produced a consolidated table without any problem. And it asked me if I wanted it to do any more analysis on the data. I'm honestly stunned at how well this worked out. And I also feel like maybe GC AI is turning the tables by giving me positive reinforcement for the approach. That's fine. I welcome the robot army if they will do tasks like this.
In my experience over the last year, this is the best Legal AI product on the market for in-house lawyers, hands-down. Great work Cecilia Ziniti!
David MorrisGeneral Counsel at Snyk
As a fractional general counsel for two fast growing technology companies, GC AI for Word has transformed how I handle legal document review and drafting. The integration is seamless, the AI suggestions are remarkably accurate for legal context, and it saves me hours each week. The beta testing experience showed a team that truly listens to user feedback. This tool understands legal nuance in ways other AI tools simply don't. Highly recommended for any legal professional working in Word.
Mike BittnerGeneral CounselThe GC AI for Word plugin has gone from a curiosity to an essential component of my workflow for contract reviews. The product team has been very responsive as we've identified new issues and proactive about adding new capabilities. It doesn't replace the need to think critically about every redline, but it cuts down dramatically on the time you need to spend on the easy stuff so you can focus on the issues that truly need your attention.
Jacob TewesFractional Legal Counsel
GC AI for Word is an invaluable multi-purpose legal assistant. It streamlines document management by identifying missing or duplicated clauses while also handling complex document review with precision. The tool excels at flagging potential regulatory issues and enforcement risks, then provides targeted language to mitigate these concerns. As a legal professional, I rely on this tool daily for efficient document drafting and comprehensive review processes.
Ora SheinsonCLOCommon questions
What Is Sandstone?
How Is Sandstone Different From GC AI?
How Much Does Sandstone Cost?
Does Sandstone Do Legal Research?
Which Integrates With More Of Our Stack?
How Do GC AI And Sandstone Compare On Security?
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2100+ in-house legal teams chose GC AI. Run research, redline contracts, and brief your execs with the legal AI built by a 3x GC.
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