LeReTo

What LeReTo does

LeReTo KG is a Vienna-based legal technology company that builds a narrow-AI platform for legal and academic research, operated as an API-first B2B service. The platform connects to more than 100 European legal databases and applies machine-learning-based semantic search, document classification, and citation linking to PDF-based German-language legal corpora. The company's flagship product, DROPZONE, is licensed to legal publishers who embed the engine into their own platforms; a sub-brand, BOOKSCREENER, extends the same underlying technology into scientific publishing screening. The firm also offers a Legal Data Science service line for bespoke analytics work.

Its business model is B2B partnership and licensing. LeReTo licenses its research engine to five named legal publishers — SACK and Soldan in Germany, Boom in the Netherlands, and Verlag Österreich and facultas in Austria — who then expose the tool to end users such as lawyers, academics, and legal professionals. With a 1-10 employee headcount, the company operates a lean, product-led GTM that relies on publisher channels rather than direct enterprise sales, which keeps go-to-market costs low but limits direct control over end-user relationships and pricing.

Leadership is anchored by CEO Veronika Haberler and co-founder Peter Melicharek. The company has accumulated external recognition, including multiple industry awards between 2016 and 2019 and a win at the EU Datathon 2019, signalling third-party validation of its narrow-AI capabilities. The narrow-AI design trades breadth of general language understanding for vertical accuracy and performance within legal-research workflows, and is the technical foundation under both DROPZONE and BOOKSCREENER.

Name

LeReTo

Legal name

LeReTo KG

Website

https://lereto.at

Company type

Private

Operating status

Operating

Headcount range

1–10 employees

Short description

LeReTo is a Vienna-based legal technology company building a narrow-AI legal research platform connecting 100+ European legal databases, licensed to legal publishers (SACK, Soldan, Boom, Verlag Österreich, facultas) for lawyers and legal professionals, with BOOKSCREENER extending the technology into scientific publishing.

Ownership category

akta.pro rank

Product category

Legal Research Software

NAICS

Software Publishers (5132), Newspaper, Periodical, Book, and Directory Publishers (5131), Web Search Portals, Libraries, Archives, and Other Information Services (519)

SIC

Miscellaneous Publishing (2741)

akta.pro industry

PRIMARYMPAJACAA

Legal & Regulatory Publishing (Case Law, Statutes, Treatises)

Media, Entertainment & Sports/Publishing (Books, News, Magazines)/Professional & Legal Publishing (Standards, Compliance, Reference)

SECONDARYEDAGAGAB

Legal Reference (Statutes, Case Law, Practice Guides)

Education/Educational Publishing & Learning Content/Professional & Technical Reference Publishing

Keywords

• Legal research software
• Legal citation linking
• Document analysis AI
• Legal data science
• Legal knowledge framework

Headquarters

HQ city

Vienna

HQ country

Austria

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Software

Cost components

Technology or R&D, Personnel, Operations, Marketing or Sales, Infrastructure

Revenue model

1. API/Platform Licensing: LeReTo licenses its framework technology and API to publishers and organizations, integrating legal research tools directly into their databases and platforms. Revenue is generated through B2B licensing arrangements with legal publishers and technology companies.
2. Professional Services: Implementation and integration services for publishers and tech companies looking to embed LeReTo's knowledge framework into their systems.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels4 records

Core offering

LeReTo sells a narrow-AI based legal research platform that recognizes and links cited sources inside PDF documents to more than 100 European legal databases in real time, producing annotated PDFs with citation links. The technology is delivered as an embedded DROPZONE widget inside publisher platforms and as an API-based Knowledge Framework for organizations, with Legal Data Science services and a BOOKSCREENER sub-brand for scientific book publishers.

Product overview

LeReTo offers a unified legal research platform centred on its core PDF enrichment and citation linking technology. The main LeReTo Legal Research Tool works alongside the PDF-Based Search feature to automatically annotate documents with links to legal databases. The Knowledge Framework provides integration capabilities for publishers and organisations, while Legal Data Science delivers AI-powered metadata and analytics as a service. BOOKSCREENER represents a specialised spin-off product for the scientific publishing market. The portfolio is held together by narrow-AI technology that processes legal documents and connects them to over 100 European databases.

Differentiator

Problem solved

Functional benefit

Brands

• BOOKSCREENER: A specialised search engine for Science Book Publishers and their customers. Built on a basic model pre-trained on a German-language background corpus.

Products and services

• LeReTo Legal Research Tool Core narrow-AI legal research platform that finds references in PDF documents and enriches them in real time with citation and knowledge links, connecting cited sources to over 100 European legal databases. Sold to legal publishers, technology companies and legal organisations for integration into their systems and for direct use by judges, litigation lawyers and legal professionals.
• Knowledge Framework Framework technology for publishers and organisations that enables easy integration of LeReTo's legal data capabilities into existing platforms and databases. Delivered as an API or embedded integration, turning customer data into knowledge through AI-powered processing.
• Legal Data Science Professional services offering applying LeReTo's data science, network analysis and AI to prepare specialised legal content, delivering high-quality metadata via API or direct database integration for organisations seeking new insights from legal data.
• BOOKSCREENER Specialised search engine for Science Book Publishers and their customers, built on a basic model pre-trained on a German-language background corpus. Provides fast, easy and accurate search across scientific book content.

Quantifiable outcome

• Significantly reduces manual legal research time by providing one-click access to legal sources instead of searching each database separately

Named customers5 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

AI capability5 records

Feature5 records

Partnerships

Eight partnerships are on record, tiered core, supportive and minor.

• SACKcoreTechnology or IntegrationSACK (Germany) has integrated LeReTo's DROPZONE technology into their platform (sack.de/sackbusiness), enabling their customers to access LeReTo's legal research capabilities directly through SACK's business portal.
• SoldancoreTechnology or IntegrationSoldan (Germany) has integrated LeReTo's DROPZONE technology into their platform (soldan.de/lereto), providing legal research tool access to their German legal market customers.
• BoomcoreTechnology or IntegrationBoom (Netherlands) has integrated LeReTo's technology at boom.nl, serving the Dutch legal market with LeReTo's legal research capabilities embedded in their platform.
• Verlag ÖsterreichcoreTechnology or IntegrationVerlag Österreich has partnered with LeReTo for integration at elibrary.verlagoesterreich.at, providing Austrian legal content enhanced with LeReTo's research technology.
• facultascoreTechnology or IntegrationFacultas has integrated LeReTo's legal research tools at facultas.at, distributing LeReTo's capabilities to Austrian legal professionals through their platform.
• Vienna Business AgencysupportiveStrategic or Co-development PartnerLeReTo is proudly supported by the Vienna Business Agency (Wirtschaftsagentur), which provides funding and support for innovative businesses in Vienna.
• Stanford CodeX TechindexminorOthersLeReTo is listed in the Stanford Law School CodeX Techindex, a directory of legal technology companies, providing credibility and visibility in the global legal tech community.
• data.gv.atminorOthersLeReTo is listed on data.gv.at, Austria's open government data portal, indicating integration with Austrian open data infrastructure.

Scale indicators2 records

Recent moves5 records

Expansion highlights4 records

Direct peers

• ROSS Intelligence: ROSS Intelligence was an AI-powered legal research platform using NLP to answer legal questions. Directly comparable to LeReTo in leveraging AI for legal research workflows and serving law firm customer segments.
• vLex: vLex is an AI-powered legal research platform with multi-jurisdiction coverage (notably strong in Europe, Latin America). Most directly comparable to LeReTo in combining legal research with AI and cross-border legal databases, with Vincent AI as a competitor to LeReTo's narrow-AI engine.

Broad incumbents

• LexisNexis: LexisNexis is a global legal research and information services giant offering comprehensive case law, statutory, and analytics tools. Comparable to LeReTo as a legal research platform with multi-jurisdiction coverage, but operating at vastly larger scale with proprietary content libraries.
• Westlaw (Thomson Reuters): Westlaw is the leading US-focused legal research platform, offering AI-enhanced search across case law, statutes, and secondary sources. Comparable to LeReTo in legal research functionality, but with broader content ownership and established enterprise footprint.
• Wolters Kluwer Legal & Regulatory: Wolters Kluwer is a major information services company with extensive legal and regulatory content and software products across Europe. Comparable to LeReTo in serving European legal professionals with organized access to statutes and case law, but as a broad incumbent.

Emerging players

• Jus Mundi: Jus Mundi is a legal research platform focused on international arbitration and public international law. Comparable to LeReTo as a specialized legal research tool with multi-jurisdiction coverage in Europe, though targeted at a narrower niche.
• Casetext (Thomson Reuters): Casetext applies AI to legal research, with its CoCounsel product. Comparable to LeReTo in bringing AI-powered research to legal professionals, though primarily US-focused.
• Harvey AI: Harvey is an AI legal assistant for law firms built on large language models. Comparable to LeReTo as a next-generation legal AI tool, but focused on generative AI for lawyers rather than citation-linking across legal databases.

Regional players

• Manz Verlag (now part of LexisNexis Austria): Manz is an Austrian legal publisher with both print and digital legal content. Comparable to LeReTo as an Austrian legal information provider and overlapping partner-publisher in the same ecosystem.

Others

• Codex (Stanford CodeX Techindex): Stanford CodeX Techindex is a directory of legal technology companies. Comparable to LeReTo as an ecosystem peer — LeReTo is already listed — and a useful proxy for identifying the broader legal tech competitive landscape.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/lereto.at
• LinkedInlinkedin.com/company/lereto

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about LeReTo