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Syllo
Syllo is a litigation platform developed and sold by TLATech Inc., a New York company founded in 2019 by two litigators and two Carnegie Mellon engineers. It holds the whole case record in one workspace, from complaint through trial, combining case management, a full eDiscovery module, deposition transcript handling and AI analysis. Its central AI feature, Agentic Issue Tagging, coordinates several language models to apply unlimited issue codes across document sets running to millions of documents.
It writes a rationale for every determination that points to the text behind it. Teams use it for responsiveness review, first level privilege review, finding hot documents and checking an opponent's production for gaps. An open prompting engine answers questions about the case record with hyperlinked citations and produces summaries, deposition digests and chronologies. A Litigation Agent for autonomous work across the case is offered in early access.
Syllo is sold on an enterprise basis to law firms, from AmLaw 100 firms to litigation boutiques, and to corporate legal departments managing litigation portfolios, and the company offers litigation support staff alongside the software.
Syllo, 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.
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Similar is not the same, so check that each one does the job you need. No vendor pays for placement.
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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 capabilities the vendor leads with run on models, and the conventional layer underneath would still work without them. Agentic Issue Tagging coordinates several language models in distinct roles to run first and second level review with unlimited issue codes, and the open prompting engine answers questions across the case record and drafts summaries, deposition digests and chronologies. The vendor calls itself a Litigation AI platform, founded to build the data and workflow infrastructure into which language models are woven.
Beneath that sits an eDiscovery module that stands on its own, with native and load file processing, Boolean and metadata search, bulk redaction and privilege log automation. Case management covers chronologies, exhibits, binders and transcript designations. Strip the models out and a litigation support team still has a review and case management platform.
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.
Accuracy is measured and published for document classification, and generated output is grounded but not measured. The white paper of 21 March 2025 reports that across the last ten completed responsiveness reviews in live litigation, estimated recall was lowest at 93.4 percent, averaged 97.8 and had a median of 99.4. Median estimated precision was 85.9 percent and the average 79.7, with figures per matter, dataset sizes, and the firms' own precision and elusion testing as the method.
Every tagging determination carries a rationale for the issue that pinpoints the text behind it, and answers from the prompting engine carry hyperlinked citations to the case record. No figures are published for the accuracy of generated answers, summaries or digests. The failure modes the paper names belong to competing approaches, such as prompt overload, context windows and hallucination in linear review, not to this system.
The benchmark is eighteen months old at this date. Grounding is to the customer's own record, not primary law, so checking citation status does not arise.
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.
Review surfaces and a validation route are real, and no threshold or use constraint is published. The white paper describes the review system as coordinating several language models that decide how to conduct the review within guidelines users set. The product page says case teams validate the outcomes of agentic issue coding to ensure defensibility for outgoing productions, and tag conflict detection is built into quality control.
The white paper's case studies show that validation as precision testing on tagged sets and elusion testing on the null set. Customer and Case Administrator roles control who can act on a case. Nothing says at what point the system stops or escalates, what any mode's output may be used for, or what happens after a coding error reaches a production. The home page headline claims the platform can autonomously manage any matter end to end; that describes the Litigation Agent, in early access, and no oversight structure is published for it.
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.
Named firms, a date, figures for what changed and a method that can be assessed are all published. The 21 March 2025 white paper lists practitioner contributors from seven firms, among them Ballard Spahr, Royer Cooper Cohen Braunfeld and Quinn Emanuel, and reports results per matter measured by the firms' own teams. Ballard Spahr's trial team tested a review of more than 100,000 documents against more than 25 issue codes and found estimated precision of 95.56 percent and recall of 99.4 percent, after about three hours of setup.
Royer Cooper Cohen Braunfeld compared approaches on a random sample of just under 16,000 documents from more than 150,000. Its managed review team using continuous active learning reached estimated recall below 67 percent at over two dollars a document, against the system's recall of 93.44 percent and precision of 69.81 percent. The paper is published by the vendor, the matters are not named, and the contributors wrote in their individual capacities.
Its footnotes disclose that one technical contributor is a research advisor and one practitioner a product advisor to the vendor.
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.
Privilege and work product are treated expressly in writing, and training is left open. The Legal Disclosure and Subpoena Policy, incorporated by the terms at section 9, states that much of what users store is confidential and privileged under the attorney client privilege and the work product doctrine. The terms add that Content is not shared with third parties except service providers, legal process and security monitoring.
Vendor personnel may not view Content without permission or a support, security or legal reason under internal controls (sections 13.1 and 16.6.2). Segregation is documented by case. The license in section 8.4.1 covers improving the service, and no commitment against model training is published. The position of any outside model provider is not stated.
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.
Professional responsibility is placed on the user and the audience is widened, while the marketing speaks of legal analysis and strategy. Section 5.4 of the terms says the service is not intended for use solely by attorneys, judges, paralegals or others in the legal profession and may be used by anyone holding a licensing agreement. It adds that the vendor has no responsibility to determine or monitor whether a user is engaged in the unlicensed practice of law.
Section 5.8 makes each user responsible for being authorized to practice where they use the service for the practice of law. The product is marketed for work product generation, legal analysis and case strategy, and the home page headline speaks of autonomously managing a matter. No statement says the product does not give legal advice, nothing addresses a supervising lawyer's competence or supervision duties, and no jurisdictional limit is stated beyond the US account rule.
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.
A measurement practice is published, and no governance framework, owner or testing before release surrounds it. The white paper describes validating outputs in live matters and reports aggregated results across ten reviews, and it names a Carnegie Mellon Language Technologies Institute researcher as a technical contributor. The Work with Syllo page says the AI systems are designed for rigorous human review and feedback.
The terms separate Beta Previews from the audited service, stating that early access features are not subject to the same security measures and auditing. No responsible AI policy or principles page is published, and no person or function is named as accountable for model behavior. Nothing describes what is tested before a model or feature is released, and uneven output across matter types or parties is not addressed.
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.
Controls are published across most of this ground, and incident practice and a processor list for the AI are missing. The Work with Syllo security section states encryption in transit and at rest in line with NIST SP 800-57, automatic backups, continuous vulnerability scanning and penetration testing, and multifactor authentication. The terms require credentials for one person only and user notice of a compromise within one business day (section 2.1), and aim for 30 days' notice before a feature is discontinued so users can export (16.3).
No commitment to notify customers of a security incident is published, and no list names who processes content for the AI features. The product Privacy Policy and Data Security Policy, which the terms place at app.syllohq.com/policies, returned an empty page to automated retrieval and could not be read on this date.
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.
Liability is handled through a disclaimer, a nominal cap and an indemnity running to the vendor. Section 15 provides the service as is and as available, disclaims any warranty that content provided through it is accurate, reliable or correct, and excludes all categories of damages. It caps the vendor's total liability to an end user at one hundred dollars and excludes liability for breaches at third party providers. The indemnity runs the other way, from each user to the vendor, for their use, their content and their breaches.
Nothing addresses AI output specifically, no vendor indemnity is offered, and no insurance position is published. The terms bind end users and give way to the customer's Licensing Agreement where the two conflict, so negotiated terms may differ, but that agreement is not published.
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.
The product stands alone by design. On its own platform page, the vendor argues that API integration and acquisition have both failed to fix fragmented litigation tooling, and offers a single environment holding the whole record instead. What it supports is interchange: native file and load file ingestion with deduplication, threading and family grouping, load file generation and Bates stamping at production, and import of standard court reporting formats in text, audio and video.
Those formats make moving a matter onto the platform routine, but no connection to an external system is named. No document management system, Microsoft Word or Outlook plugin, matter management, electronic billing or court filing integration is published, and no API or developer documentation 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.
Residency is offered and the hosting provider is named, and the deployment options are not specified. The security section says multiple secure deployment options are available, data storage is regionalized to customer needs, and for firm engagements the vendor will work with a firm's security team to customize deployment. The terms name the infrastructure: Content is stored on Amazon Web Services virtual servers and Amazon S3 storage the vendor controls, with ElasticSearch for indexing (section 13.3).
User accounts may not be used outside the United States, a restriction the terms tie to privacy and data protection law (sections 2.1 and 5.6). The options themselves are not named, so whether dedicated, private cloud or on premises arrangements exist cannot be established. No regions are listed, and nothing separates where model inference runs from where data is stored.
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.
A SOC 2 Type II attestation is named with its scope and auditor, and no route to the report exists. The compliance section states SOC 2 Type II certification in Security, Confidentiality, Availability and Privacy, compliance with the AICPA SOC standards for service organizations, and third party validation by Prescient Assurance. No trust center is published on the site or by search on this date, no report period or issue date is given, and no request route of any kind is described.
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.
The architecture is described in detail, and no provider or model is named. Product pages say the platform runs on a combination of proprietary Syllo models and foundational language models. The white paper describes an ensemble of language models of varying size in distinct roles, such as strategizing, quality control and resolving disagreement between models, with telemetry routing harder material to more capable models and simpler material to cheaper ones.
No provider, model family or version is named on any surface read, nothing says where inference runs as distinct from the storage named in the terms, and nothing addresses what a model provider may retain. On change, the terms reserve the right to modify any feature at any time with or without notice (section 13.7).
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.
No price, unit of charge, tier or list of inclusions is published. The pricing section of the Work with Syllo page names two customer segments and routes both to a sales conversation: corporate legal teams are offered the platform on an enterprise basis, and law firms a firmwide enterprise partnership. Firmwide describes the scope of a license, not a unit anyone could price. The home page, platform and tagging pages, the terms and the white paper were also searched, and the only cost figures on the site describe competitors.
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.
Segments and matter types are described with evidence, and the boundaries are not. The vendor names AmLaw 100 firms, litigation boutiques and corporate legal teams managing complex litigation portfolios, with a dedicated page for the last. The white paper shows the breadth with named firms from AmLaw defense practices to a plaintiffs' employment firm. It lists thirteen kinds of matter the system has been used on, among them antitrust, patent and mass tort, across datasets from thousands to more than two million documents.
The scope is litigation throughout. Nothing addresses government or court use or names matter or data types it handles poorly, and the one stated limit, the US account rule, is framed as data protection rather than coverage.
5 public documents
The public pages on file for Syllo, 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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syllo.ai/tos4 signals
Client Data in Training, Prompt and Output Retention, Bar Guidance Alignment and 1 more
Read Sep 18, 2026
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syllo.ai/agentic-issue-tagging3 signals
Ethical Walls and Matter Segregation, Refusal and Uncertainty Behavior, Court Disclosure Support
Read Sep 18, 2026
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syllo.ai/subpoena-policy1 signal
Third Party Request and Subpoena Notice
Read Sep 18, 2026
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syllo.ai/white-paper-20251 signal
Billing and Fee Posture
Read Sep 18, 2026
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Fabricated Citation Record
Read Sep 18, 2026
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?
The customer agreement or data processing addendum contractually limits use of Customer Data to providing the contracted service, and no surface names training either way. The limit is bound, which a policy page is not, but it is not an express training prohibition. If any surface names training in either direction, one of the other values is true and this one is not.
Use of customer content is bounded to providing and improving the service, and no surface names model training either way. Section 8.4.1 grants a limited license to use Content for providing or improving the service, fixing issues and support, or as the user or customer instructs. Section 16.6.4 says the license does not permit use of Content outside provision of the service, and section 8.1.3 says the vendor acquires no other rights.
The grant is an improvement right that never names training, and the Work with Syllo page adds that lawyers and firms play a critical role in shaping and improving Syllo's AI systems.
Prompt and Output Retention
How long does the product keep what a lawyer typed, and can that be set to zero?
Retention is acknowledged in public materials with no stated period.
The terms acknowledge retention without giving a period for prompts, outputs or case content. Under section 2.3.2, when a user cancels an account the vendor may keep the content of that user's personal knowledge bases as needed for legal obligations, disputes and enforcement, and reserves the right to delete it within 90 days, with some information possibly remaining in encrypted backups. Section 2.1.8 puts export on the user and says the vendor has no obligation to provide case or knowledge base content after the licensing agreement ends.
Nothing says how long prompts, generated answers, rationales or case records are kept during a subscription or after it, and no customer retention setting is described.
Ethical Walls and Matter Segregation
Does retrieval respect the firm’s ethical walls, or can the model read across them?
The product maintains its own permission model, documented, requiring the firm to keep it aligned.
Permissions are documented inside the product, organized by case, and a firm has to keep them aligned with its own walls. The terms define Cases, each with a Case Administrator who controls access, and a Customer Administrator with final control over every case and knowledge base at the customer (sections 1, 2.2 and 6). A user given access to a case reaches all of its content through every case application, and content posted to a case or shared knowledge base is visible to others with access automatically (8.2.2).
Personal knowledge bases can be kept private. The product page states that permissions by role and isolation at matter level are standard. Nothing connects this model to a firm's document management permissions, so walls are set inside the platform rather than inherited.
Third Party Request and Subpoena Notice
If someone subpoenas the vendor for a firm’s data, does the firm hear about it first?
Terms commit to notice where lawfully permitted. No transparency report located.
The Legal Disclosure and Subpoena Policy, which the terms incorporate at section 9, commits to written notice to a current or former customer of a civil subpoena or a criminal subpoena, warrant or similar process, so the customer can seek a protective order, and to furnish only what the vendor determines is legally required while seeking confidential treatment. The exception is where notice would breach a court order or could expose the vendor to criminal liability.
The policy argues that the vendor is an inappropriate target because the information is often privileged and remains in the customer's control under Federal Rule of Civil Procedure 34(a)(1). Users who are not customers get no notice commitment. No transparency report was located.
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 source of primary law is identified. The product works over the customer's own case record, and its citations point into that record. The home page headline lists legal research among the platform's functions, but no surface names a source of case law, statutes or regulations behind it. The home page, platform, tagging and Work with Syllo pages, the white paper and the terms were searched on 18 September 2026.
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 citator or check of later history is described. Output cites documents in the customer's case record rather than legal authority, so the question arises only for the legal research function named in the home page headline. Nothing published says whether authority returned there is checked, as of 18 September 2026.
Refusal and Uncertainty Behavior
What does the product do when the answer is not in the corpus?
The product exposes a confidence or grounding score without an explicit abstention path.
Relevance levels are exposed and each determination is grounded, and no abstention path is documented. The product page describes moving through the record by documents' degree of relevance, and the white paper reports outputs such as highly responsive and likely responsive, with hot documents escalated separately. Nothing describes what the prompting engine does when the record does not support an answer, and no state is described in which the system reports that it cannot tell.
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 trade press reporting were searched on 18 September 2026. Neither held a court record addressing fabricated or hallucinated legal citations in output from Syllo or its developer, TLATech Inc. Litigation history of other kinds is not covered here.
Bar Guidance Alignment
Has the vendor engaged in public with the ethics opinions its buyers are bound by?
Public materials refer to professional responsibility in general terms without naming guidance.
Professional regulation is mentioned in general terms, and no ethics guidance is named. Besides the user responsibility clauses in sections 5.4 and 5.8, the terms say the vendor may act on instruction from an attorney disciplinary body. The white paper cites the Sedona Conference TAR Case Law Primer and the Bolch Judicial Institute TAR Guidelines on defending review assisted by technology; those are standards for review methodology aimed at courts, not bar ethics opinions. No ABA or state bar opinion on generative AI appears anywhere in the material read.
Billing and Fee Posture
Does the vendor address what happens to the bill when the work takes an hour instead of six?
Public materials claim time savings without addressing billing or disclosure, and the product sits inside a fee relationship between a lawyer and a client where those savings would change the bill.
Time and cost savings are claimed for work inside a lawyer and client fee relationship, and billing and disclosure are not treated. The product pages claim review at twenty times the throughput of traditional methods and at a fraction of the time and cost. One case study records that the firm educated its client on the option to use the platform and the client chose to proceed, and a partner refers to the amount the client paid for the review; that is one firm's practice, not vendor guidance. Rationales and audit logs exist, but nothing marks work as done with AI for fee purposes.
Outside Counsel Guideline Readiness
Can a firm get this vendor through a client’s AI clause without a bespoke negotiation?
No located public material supports a client side disclosure obligation.
No subprocessor list, model provider statement or forwardable disclosure pack was located. The storage infrastructure named in the terms does not say whose models see client content. The SOC 2 report has no stated access route, and no DPA is published. A firm answering a client's AI clause could say where data sits but not which model providers process it.
Court Disclosure Support
If a judge’s standing order requires an AI disclosure, can the product produce one?
Some elements of the record are available, short of a document level export.
Parts of a disclosure record exist, short of an export per document covering model, sources and human verification. Audit logs are standard, the platform generates privilege logs and production load files, and exported chronologies and summaries link directly to the record. Determination rationales and the documented validation method also bear on defending a review. Nothing states which model produced an output, and no export framed as a record of AI use or verification for a court is described.