Sandstone's 2 Oct release lets Ask in the Word add in use the selected text or current paragraph as context, and adds a filter for unassigned issues. DocuSign notifications now name signers, CC recipients, signing order and workspace, and Zip setup is separated from ongoing settings. Several sync fixes stop duplicate runs, keep one invalid record from halting a sync, and route Word add in replies to the right Slack thread.
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Sandstone
Sandstone is an AI platform for in house legal departments built around the intake, routing and execution of legal requests. Requests arrive from Slack, email, Jira, ServiceNow and the other systems the business already uses, and agents read the intent, gather counterparty history and route work to the lawyer with the right expertise and capacity. A repository holds documents, companies, people and past decisions, and playbooks built from a team's own templates, redlines and policies learn with each use so negotiating positions stay consistent across the organization.
Agentic workflows redline, draft and reply to comments, completing simpler work and handing more complex matters to a lawyer, while reporting aggregates cycle times, risk exposure, capacity and deviation rates. The product works through a Microsoft Word add-in, a Google Workspace add-on and a stated fifty or more integrations including Salesforce, Ironclad, SharePoint, Coupa and Workday. Sandstone publishes its platform terms of service, data processing agreement, security policy and privacy policy in full, and states SOC 2 Type 2 certification and zero data retention agreements with its model providers.
Named customers include Middesk, MasterClass, Crexi, Ocrolus and Hypertherm. Sandstone is the trading name of Glaze AI, Inc.
Sandstone, head to head
Side by side on the same 15 capability axes and 12 legal signals: where the two part company, and what neither one publishes.
Alternatives to Sandstone
Vendors in the same categories as Sandstone whose graded profiles look most alike, with a line on what each product does.
Similar is not the same, so check that each one does the job you need. No vendor pays for placement.
- XXakiaXakia is a matter management and legal operations platform for in house legal teams of roughly 2 to 200 people, founded in 2016 and headquartered in Melbourne, with offices in Kansas City and London.
- OOntraOntra is an AI platform for private markets firms, covering the routine legal and compliance work around funds.
- SSimpleLegalSimpleLegal is Onit's corporate legal operations platform for electronic billing, matters, vendors and reporting.
- MMitratechMitratech supplies corporate legal departments with TeamConnect for matter management, outside counsel spending, electronic billing and litigation administration.
- PPlexusPlexus is a legal operations platform for in house legal teams, sold as an AI powered Legal OS.
- PProvakilProvakil combines litigation operations, contract management, intellectual property tracking and legal collections for enterprise legal departments.
Ordered by how closely the graded profiles match across the 15 capability axes, inside the same categories. See how each axis is graded in the methodology.
Capability grades
All 15 axes, graded from public sources on the date shown. Hover a grade to see what the letter means on that axis.
AI Centrality
How much of the product is actually AI. Whether the machine learning is the mechanism the buyer is paying for or a feature layered onto conventional software, and whether the vendor is specific about which is which.
The models drive the features Sandstone sells on: agents that read an incoming request and route it, playbooks that learn from a team's own redlines and policies with each use, and agentic workflows that redline, draft and reply to comments. Underneath is a product that would still work without them. The repository of documents, companies, people and past decisions, the matter and task tracking, the intake channels and the reporting on cycle times and capacity form a legal operations system. The vendor describes the platform in those terms, as a single system of record and an operating layer.
Citation Accuracy and Hallucination Disclosure
Whether the vendor publishes measured accuracy on citations and assertions, grounds output to primary sources, and says plainly what its system does when it does not know. Legal has a documented public record of fabricated citations reaching filed briefs, so an untested claim of accuracy is not evidence.
Grounding is claimed but never described or measured. Multi-Source Citations is listed as a feature of the agentic workflows, alongside redlining and drafting from best practices, and the platform's premise is that output rests on the organization's own precedent. Nothing goes further: no retrieval method, accuracy figure, test set, evaluation or statement on hallucination is published. The subject comes up only in a customer story, which describes redlines previously drafted with general purpose tools that produced hallucinated Word output. That frames hallucination as a problem of the tools Sandstone replaced and says nothing about its own rate.
Autonomy and Oversight Model
What the system decides on its own, what a lawyer must approve, and whether the vendor documents where the review point sits. A tool that drafts under review and a tool that files without one are different products and different risks.
The handoff rule is stated plainly: agents complete simple legal work and hand complex tasks to lawyers. That is a real division of labor, backed by described review surfaces, with redlines arriving as changes to accept or reject and routing sending work to a named owner. Clause 1 of the terms of service says these are self help services provided at the customer's specific direction. The boundary itself is not defined.
Nothing says what makes work simple rather than complex, no threshold or confidence condition is described, and nothing states what happens after an agent is wrong. The Google Workspace add-on's published permissions include sending mail on the user's behalf, so agents can act outward, and no oversight condition is published for that.
Operational and Outcome Evidence
Named, dated evidence that the product works in production at real firms or legal departments. Case studies with figures and identified customers count. Unattributed testimonials and launch announcements do not.
Five customers are named with substantive case studies rather than logos: Middesk, a business identity platform with a single in house counsel; MasterClass, whose General Counsel Kevin Yung is named; Crexi; Ocrolus; and Hypertherm, a global manufacturer. Each story describes the starting position, the problem and what the platform was deployed to do. None of the five includes a figure, so nothing is measured, and none is dated.
Several are written in the present tense, describing what a customer is consolidating or working to eliminate rather than what it achieved, which reads as deployment still in progress.
Privilege and Confidentiality Posture
How client confidences are handled: attorney client privilege and work product treatment, segregation of one client matter from another, whether client data trains any model, and what the vendor commits to in writing rather than in marketing.
Substantive commitments are published in the agreement as well as the marketing. Clause 9.4 of the terms of service commits Sandstone to be able to identify the customer's data separately from any other data it controls, and clause 10 sets mutual confidentiality lasting five years after termination. The security page says Sandstone does not train models on customer data and that its model providers operate under zero data retention agreements, so they do not keep prompts or outputs.
The customer sets retention, and export is available. Privileged material is named but not handled. The privacy policy lists Legal Advice and Attorney-Client Privileged Content, including internal legal memos and drafts marked privileged, as a category of sensitive information it processes, and then commits to nothing specific about how it is treated. Clause 1 of the terms disclaims an attorney client relationship with Sandstone, which is a different question.
UPL and Professional Responsibility Posture
Whether the vendor is clear that it supplies a tool rather than legal advice, who its audience is, and how it addresses unauthorized practice of law, competence and supervision duties, and jurisdiction limits. ABA Formal Opinion 512 is the reference point. Where the advice line is not the duty a product raises, the axis is read through the nearest professional duty it does raise: judicial conduct rules and the reviewing duty for products sold only to courts, and the duty to bill for time actually spent for products that draft time entries.
The advice line is addressed directly in the operative agreement. Clause 1 of the terms of service says Sandstone provides self help services at the customer's specific direction, is not a law firm or a substitute for an attorney, and that outputs are not legal advice. It says a licensed attorney should be consulted on accuracy or applicability, and that use creates no attorney client relationship. The same clause treats the customer as a user whether a lawyer or a business user of a shared workspace, which acknowledges that people who are not lawyers use the product.
No jurisdiction limits are stated, and nothing addresses the supervision and competence duties of the lawyers who sign off on the work. No bar or ethics guidance is cited.
AI Governance and Bias Disclosure
Published governance over model behavior: who owns it inside the vendor, what is tested before release, and what is disclosed about disparate output across matter types, parties, or populations.
Nothing published addresses governance over model behavior. There is no responsible AI page, governance framework, certification such as ISO 42001 or named owner, no account of what is tested before a model or workflow ships, and nothing on uneven output across matter types, counterparties or populations. SOC 2 Type 2 and penetration testing are security matters, and the zero data retention arrangement with model providers is data protection.
The trust center at trust.sandstone.com, hosted by Vanta, describes itself as covering advanced protections for agentic offerings without naming any.
AI Safety and Data Stewardship
Retention, deletion, access control, and what happens to prompts and documents after they are processed. Whether the vendor states its subprocessors and its incident practice, or leaves the buyer to assume.
Most of the ground is covered with specifics. The customer sets retention and can export data, and Sandstone's FAQ says plainly that it still stores what the customer puts in the product to run the service. Encryption is AES-256 at rest and TLS 1.3 in transit. Access control covers SAML single sign on, role based permissions, audit logs, session management and user lifecycle management. An in house security team monitors and responds to incidents around the clock.
A published vulnerability disclosure policy commits to acknowledge reports within 72 hours, give updates, confirm resolution and offer safe harbor for good faith research. Clause 9.5 of the terms requires the customer's prior written permission before any subcontractor processes its data, with written notice of purpose and due diligence. No subprocessor list is published anywhere.
AI Liability and Recourse
What the vendor stands behind contractually when its output is wrong. Indemnities, caps, carve outs, insurance, and whether any of it is published or only reachable through a negotiated agreement.
A complete published position, and what it allocates to the customer is everything. Clause 14 gives real service warranties: enough trained personnel, reasonable efforts consistent with prevailing industry standards, provision in accordance with applicable laws, and no intentional introduction of malicious software. Clause 15 then disclaims all other warranties, states that the customer uses the services at its own risk, and records that Sandstone has no duty regarding how the customer interprets or uses the content.
Clause 16.2 runs an indemnity from the customer to Sandstone, and no indemnity runs the other way beyond the mutual confidentiality indemnity at clause 10.4. Clause 17.1 then excludes direct damages altogether rather than capping them, so the warranties at clause 14 carry no monetary remedy. No cap figure and no insurance commitment appear. Nothing here gives the customer a recourse when output is wrong.
Practice Systems Integration Depth
How deeply the product reaches into the systems legal work already lives in: document management such as iManage and NetDocuments, Word and Outlook, contract lifecycle management, matter management, e-billing, and court filing systems.
Reach is broad, and depth is not described. Twenty integrations are named with logos, across the systems in house legal work touches: Microsoft Word, Outlook, Teams and SharePoint, Google Docs and Drive, Slack, Salesforce, Jira, Asana, ServiceNow, Zendesk, HubSpot, Workday, Coupa, Notion, Box, Dropbox, OneDrive, Zip and Ironclad. The vendor claims more than fifty in all. Ironclad matters because it is a contract lifecycle system rather than a general business tool.
A Google Workspace add-on is listed on the Marketplace with its permissions shown, which can be checked. Nothing says what synchronizes, in which direction, on what trigger, or what a customer configures, and no developer documentation, API reference or implementation guide is published.
Deployment Model and Data Residency
Where the software runs and where the data sits. Multi tenant cloud, single tenant, private deployment, on premises, and whether region of residence is a published option or an enterprise conversation.
Cloud delivery is implied, and neither tenancy nor region is stated. No region or residency option is published, and the agreement points away from one. Clause 9.6 says the customer's data will remain wherever Sandstone first places it, and the customer consents to transfer to group companies, service providers or agents who may be in other countries. The privacy policy adds that data may be stored in a foreign country whose privacy laws may be less strict than where it was collected.
No tenancy model is stated, whether multi tenant, single tenant or private. Network isolation is named as a control on the security page, but that describes segmentation, not tenancy or residency.
Security Certifications and Trust Center
Independent attestation a buyer can pull without a sales call: SOC 2, ISO 27001, penetration test summaries, a trust center with current reports and named scope rather than a badge image.
SOC 2 Type 2 is stated clearly and repeatedly on a security page written for the customer's security reviewer. The page also lists annual third party penetration tests, continuous automated scanning, internal assessments, and a security addendum described as aligned to SOC 2 Type 2 and available for counsel to review. No auditor is named, no coverage period or report date is published, and the page says further independent assessments are in the trust center rather than listing them. That trust center is at trust.sandstone.com, hosted by Vanta.
Model Supply Chain Disclosure
Which models sit underneath, whose they are, where they run, and whether the vendor commits to telling customers when that changes. A legal buyer inherits every dependency it cannot see.
Sandstone refers to its model providers repeatedly and names none of them. The security page says model providers operate under zero data retention agreements, so they do not keep prompts or outputs; that is a meaningful commitment, made without saying who the providers are. No model or provider is named, no subprocessor list is published, and nothing says where inference runs. Clause 9.5 of the agreement requires the customer's prior written permission before any subcontractor processes its data, with written notice of the purpose and of the due diligence performed. That gives a customer a contractual route to learn who is in the chain, but the vendor does not publish it.
Commercial Transparency
Whether a buyer can learn what this costs without entering a sales process: published rates, the unit being charged, what sits behind an enterprise tier, and what implementation adds.
The unit and structure of charging are published, without any figure. Clause 13.2 of the terms of service says the service is a subscription, monthly or yearly at the customer's choice. Clause 13.3 says services may also be offered on a usage basis, with details at sign up and 30 days' written notice of changes. Clause 13.4 sets automatic renewal at the then current nonpromotional rate, with cancellation in the subscription management section, and 13.5 covers free trials.
A buyer can learn what is charged for and how often before contacting anyone. There is no pricing page in the navigation or footer, no tier names or feature splits, and no figure anywhere; the only commercial route is Book a Demo. The structure sits in the agreement rather than on any sales page.
Firm and Practice Coverage
Who the product is actually built for. AmLaw, midlaw, small firm and solo, in house departments, government and courts, and which practice areas are supported rather than merely claimed.
The buyer is described precisely by role: General Counsel, Chief Legal Officers, associate and assistant General Counsel, practice area leads and legal operations staff at scaling companies and enterprises. The five customer stories range from a company with a single in house counsel to a global manufacturer, across technology, consumer media, commercial real estate, financial document automation and industrial manufacturing.
The boundary is left open. Practice areas are not listed, since coverage is described by workflow rather than matter type. No company size floor is stated beyond scaling, no jurisdiction or geography appears, and nothing says what the platform does not support. Law firms are implicitly out of scope but never named as such.
4 public documents
The public pages on file for Sandstone, with the recorded signals each one supports and the date it was last read. Open any of them and check the reading against the record.
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sandstone.com/security2 signals
Client Data in Training, Prompt and Output Retention
Read Sep 2, 2026
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sandstone.com1 signal
Ethical Walls and Matter Segregation
Read Sep 2, 2026
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sandstone.com/privacy-policy1 signal
Third Party Request and Subpoena Notice
Read Sep 2, 2026
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Fabricated Citation Record
Read Sep 2, 2026
No published figure
- Sandstone does not say what it costs anywhere on its website.
- What it does say, in its contract, is how the charging works: you pay a subscription, and you pick monthly or yearly.
- Some customers may instead be charged by how much they use, and those details are given when you sign up.
- Subscriptions renew automatically unless you cancel, and free trials exist.
- To get an actual number you have to book a demo and talk to their sales team.
Structure only; no figure is published. Clause 13.2 of the terms of service says the service is a subscription, monthly or yearly at the customer's election. Clause 13.3 says services may also be offered on a usage basis, with details at sign up and 30 days' written notice of any change. Clause 13.4 provides for automatic renewal for periods equal to the original term at the then current nonpromotional rate, cancellable in the subscription management section, with no prorated refund for termination mid term.
Clause 13.5 covers free trials. Clause 13.7 sets interest on overdue amounts at the higher of 2 percent above prime or 15 percent. There is no pricing page in the site navigation or footer, no tier names or feature splits are published, and the only commercial route on the site is Book a Demo.
Tracked changes at Sandstone
Legal Signals
What each signal meansA signal records what public sources say on the date shown. It is not a grade and it is not a recommendation. Where a signal reads Not addressed, it means the index did not locate the material in public sources on that date, which is a statement about disclosure rather than about the product.
Client Data in Training
Can material a lawyer puts into this product be used to train a model?
A public policy or trust page states no training on customer content, with no matching term located in the published agreement.
The commitment is stated twice on the security page, once as a control and once in the review FAQ, and it is extended outward: model providers operate under zero data retention agreements so they do not retain prompts or outputs. It sits on a policy page rather than in the agreement. The published terms of service contain no matching term. What they do contain is clause 9.3, which provides that Sandstone owns derived data, defined as data it creates from the customer's data through aggregation, deidentification or anonymization for its own internal purposes.
That clause names neither training nor machine learning, so it does not contradict the promise, but it is the clause that bears on it. The privacy policy adds a narrower statement scoped to the Google Workspace integration, that Google data is not used to train generalized AI or ML models.
Prompt and Output Retention
How long does the product keep what a lawyer typed, and can that be set to zero?
The customer controls the retention window, by product configuration or by contractual instruction, but zero retention is not stated as available.
Retention is under customer control and export is available, as a stated commitment on the security page. Zero retention is not available at the Sandstone layer, and the vendor says so directly. Sandstone's FAQ says zero data retention applies to the model providers, which process a request and do not keep the prompt or output, while Sandstone stores what the customer puts in the product to run the service. No default period is published for a customer who sets nothing.
The agreement is permissive at the end: clause 19.3 says Sandstone may erase the customer's data on termination, and clause 20.2 makes retrieving data after termination subject to additional fees.
Ethical Walls and Matter Segregation
Does retrieval respect the firm’s ethical walls, or can the model read across them?
Segregation is asserted in public materials with no published detail on how it is enforced.
Separation is claimed and never documented. Sandstone's home page says agentic workflows respect permissions across systems, meaning retrieval should follow the access rules of the source systems. That matters because the platform reaches into Slack, Salesforce, SharePoint, Google Drive, Jira, Box and others where a company's own permissions live. Nothing describes how this is enforced, whether it is checked per user when a query runs, or what happens when a source system's permissions and Sandstone's own role based permissions disagree.
Clause 9.4 of the agreement says Sandstone will be able to identify the customer's data separately from other data it controls, which covers separation between customers, not between users or matters within one. Role based permissions and SAML single sign on are named on the security page without detail.
Third Party Request and Subpoena Notice
If someone subpoenas the vendor for a firm’s data, does the firm hear about it first?
Published terms or policy address disclosure to authorities or in response to legal process, and no commitment or reservation regarding customer notice is located anywhere. The vendor has told the customer that data can leave and has said nothing about whether the customer hears of it.
The privacy policy addresses compelled disclosure directly, listing a subpoena or court order, compliance with any law, protecting the safety of any individual or the general public, and preventing violation of customer relationship terms. It also states separately that personal information may be disclosed as required by law or governmental audit. Nothing in the privacy policy, the terms of service including the confidentiality clause at 10, the website terms of use, the security page or the security policy commits to telling the customer, and nothing reserves discretion over notice either: the question of notification is simply never reached.
Clause 10.3 mentions disclosure to comply with a court order in the context of returning confidential information at the end of the agreement, which is not a notice provision.
Primary Law Corpus Provenance
Where does the law in this product come from, and does the vendor have the right to use it?
No located public material identifies the corpus behind the product’s answers.
No outside legal content is identified, and none is claimed. The platform works on the customer's own contracts, templates, redlines, policies and past decisions, drawn from the systems the business already uses, so it does not retrieve primary law. Nothing published suggests any external legal content is bundled.
Good Law Verification
Does the product tell you when the authority it just cited has been overruled?
No located public material addresses whether authority is checked for subsequent history.
No public material addresses subsequent history, treatment flags or citator coverage, and none is claimed. The product is built on the organization's own precedent and business context rather than on primary authority, so no good law check is offered, and no weaker form of checking is described.
Refusal and Uncertainty Behavior
What does the product do when the answer is not in the corpus?
No located public material addresses what the product does when it cannot ground an answer.
Nothing published describes what the platform does when it cannot ground an answer. The nearest statement is the home page's division of labor, that agents complete simple legal work and hand complex tasks to lawyers. That is a routing rule, not an account of declining: it does not say what an agent does when it is uncertain about work it has already taken on. No confidence or grounding score is shown and no path for declining to answer is documented.
Fabricated Citation Record
Does a public court record exist addressing fabricated or hallucinated legal citations in output from this product?
No court order, opinion or disciplinary record addressing fabricated or hallucinated legal citations produced by this product has been located as of the date shown. This is a statement about the public record on that one subject, not a finding about the product, and this signal is not a litigation history.
The AI Hallucination Cases database maintained by Damien Charlotin, and reporting drawing on it, record no court order, opinion or disciplinary record naming Sandstone or the corporate name Glaze AI. Sandstone is a common word that appears in unrelated company names, which makes the record harder to search by name. The platform is also sold to in house departments for intake and contract work rather than to litigators for filings, so this risk is lower than for a research tool.
Bar Guidance Alignment
Has the vendor engaged in public with the ethics opinions its buyers are bound by?
No located public material engages with bar or ethics guidance.
No public material engages with ABA Formal Opinion 512, any state bar opinion or any other named ethics guidance. Clause 1 of the terms of service covers similar ground in substance: Sandstone is not a law firm, outputs are not legal advice, a licensed attorney should be consulted, and no attorney client relationship arises. That is the vendor's own framing, not engagement with the guidance its buyers must follow.
Billing and Fee Posture
Does the vendor address what happens to the bill when the work takes an hour instead of six?
The product does not touch a fee between a lawyer and a client. It operates before an engagement exists, or it is bought by a team that bills no client for the work. Savings claims aimed at the buyer’s own cost are recorded in the summary and do not make the row a savings claim, because no client bill is in the loop.
Nothing addresses billing, fees or disclosure of AI assisted work, and no record separating AI assisted work by matter is described. Reporting does measure matters, aggregating cycle times, risk exposure, capacity and deviation rates for legal operations to benchmark and report, but that records the work, not what the AI did within it. No time savings figure is claimed anywhere. Sandstone's buyer is the in house department that receives bills rather than a firm that issues them.
Outside Counsel Guideline Readiness
Can a firm get this vendor through a client’s AI clause without a bespoke negotiation?
The material exists behind a sales conversation or an executed agreement.
The material exists and is reachable only by asking. The security page is written for this purpose, presented as something to send to a security team. It says reports, questionnaires and the rest of the review pack are in the trust center, and that a security addendum is available for the customer's counsel to review. The trust center is hosted by Vanta, and no subprocessor or model provider list appears on any public page.
Clause 9.5 of the terms gives the customer a right of prior written consent before any subcontractor processes its data, with notice of the purpose and the due diligence performed, which is a route to the information rather than a disclosure of it.
Court Disclosure Support
If a judge’s standing order requires an AI disclosure, can the product produce one?
No located public material addresses court disclosure or verification certification.
Nothing addresses judicial standing orders, AI use disclosure or verification certification. Audit logs are named on the security page as an access control and reporting covers cycle times and workload, neither of which records which model produced which passage or what it retrieved, so no disclosure record for each document is described. The product class is relevant: the platform is sold to in house departments for intake, contracting and workflow rather than for court filing, so a filing disclosure obligation would usually fall on the outside counsel handling the matter.