What U31 does

U31 is a Paris-based software company founded in 2021 that builds a real-time text adaptation engine for plain language writing. Its core product combines a deep-learning clarity scoring model (the proprietary LC-Score, scaled 1-100 with Nutriscore-style A-E visual indicators) with a linguistic rule engine to detect and automatically reformulate complex words, long sentences, gendered language, and accessibility or eco-design issues. Distribution is delivered through a SaaS web editor, desktop software, and plugins for Microsoft Word, Outlook, Google Suite, CRM systems, and bespoke business tools, with on-premise installation available for security-sensitive clients.

U31 serves three primary segments: large French enterprises (CAC 40 and equivalents) across banking, insurance, telecom, retail, transport, and energy; French public administration entities; and SMB/individual users via self-serve. The business model combines subscription SaaS licenses (starting at €9.90 per user per month, sold annually) with a higher-value professional services offering: a structured ~3-month accompaniment program (pilot plus generalization phases) plus a custom transcription-on-demand entry point used as a proof of concept. Documented outcomes include +32% satisfaction at BPCE Assurances (panel of 500), +21% offer transformation rate at Orange, 73% of CNAV agents wanting to continue using the tool, and 1,000 CNAV agents equipped.

The company positions itself as a sovereign alternative to general-purpose AI writing assistants: servers are hosted in France, the methodology aligns with ISO 24495-1:2023 Plain Language, the product carries a Plan d'Assurance Sécurité per French National Technical Directives, and it holds a granted French patent (FR3110740A1) with published peer-reviewed research. Distribution and customer evidence are concentrated in the French domestic market.

Name

U31

Legal name

U31

Website

https://u31.io

Company type

Private

Founded year

2025

Operating status

Operating

Headcount range

1–10 employees

Short description

U31 is a Paris-based software company that provides a real-time AI-powered text adaptation tool for plain language writing, scoring clarity on a 1-100 scale and offering plugins for Word, Outlook, Google Suite, and CRM. It primarily serves French large enterprises, public administration, and SMB users via SaaS subscriptions and multi-month accompaniment programs.

Ownership category

akta.pro rank

Product category

Plain Language Software

NAICS

Software Publishers (513210)

SIC

Services-Prepackaged Software (7372)

akta.pro primary industry

Document Creation & Office Suites (BPAMAMAD)

akta.pro secondary industry

Language Assessment, Placement Testing & Proficiency Certification Tools (EDAFAOAH)

Keywords

• Plain language software
• Text clarity scoring
• Document accessibility tools
• AI text simplification
• Inclusive writing software

GTM type

B2B

Offering type

Software

Cost components

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

Revenue model

1. SaaS Subscription Licenses: Annual license providing unlimited use of all U31 features and services including the web editor, desktop software, and plugins (Word, Outlook, Google Suite). Pricing starts at 9.90€ per month per user. Includes a guide to plain language and support services.
2. Professional Services — Accompaniment Program: Structured accompaniment engagements (~3 months) comprising a pilot phase (sensitization workshops, baseline audit and adaptation of typical texts, effectiveness testing with KPIs) and a generalization phase (tool deployment and customization, team training, transformation support).
3. Custom Transcription on Demand: Customers provide a site, document, or email; U31 returns a diagnostic and a simplified version of the content. Serves as an entry-level engagement and proof-of-concept for new clients.

Pricing tiers

Go-to-market motion2 records

Distribution channels6 records

Marketing channels3 records

Core offering

U31 develops and sells a SaaS text adaptation platform that combines neural networks and linguistic rules to score written content on a 1–100 clarity scale aligned with the ISO 24495-1:2023 plain-language standard, and to automatically simplify it. The platform is delivered through a web editor, plugins for Microsoft Word, Outlook, Google Workspace, and custom enterprise tool integrations, with multi-dimensional analysis covering clarity, inclusion, accessibility, and eco-design. It is offered to enterprises and public administrations via annual subscriptions and structured accompaniment programs, with a sovereign French-hosted cloud and an on-premise deployment option for regulated organizations.

Differentiator

Problem solved

Functional benefit

Products and services

• U31 Annual License (SaaS subscription)

Quantifiable outcome

• +32% customer satisfaction at BPCE Assurances (service réclamations, 500-respondent panel)
• +5 more outcomes

Named customers12 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration6 records

AI capability3 records

Feature11 records

Scale indicators6 records

Recent moves5 records

Expansion highlights5 records

Direct peers

• LanguageTool: Multilingual grammar and style checker with strong French support, available as SaaS and plugins for major office suites. Comparable in plugin distribution model and language-coverage scope.
• ProWritingAid: Writing-assistance platform offering grammar, style, and readability analysis with integrations for Word, Outlook, and Google Docs. Comparable on multi-dimensional text analysis and plugin distribution.
• Hemingway Editor: Readability scoring and simplification tool that flags complex sentences and offers plain-language rewrites. Direct functional analogue to U31's clarity-score and sentence-reformulation features.
• Grammarly: Global AI writing assistant offering grammar correction, clarity, tone, and style guidance with plugin support for Word, Outlook, and Google Workspace. Broadest-scale peer for U31's core functionality.
• Antidote: French-language spelling, grammar, and clarity correction tool (by Druide Informatique). Direct competitor to U31 in the French market, offering similar plain-language capabilities for enterprise and institutional users.
• Cordial: French writing-assistance and text-quality tool focused on correcting and improving French-language content for businesses. Most direct French-market peer alongside Antidote.
• Acrolinx: Enterprise content quality platform that scores and enforces clarity, tone, and terminology across large organisations. Closely comparable to U31's enterprise B2B motion, plugin-based authoring integration, and measurable content KPIs.
• Voltaire: French spelling, grammar, and typography correction tool from ProLexis, widely deployed in French enterprises and public administration. Comparable French-language correction capability to U31.
• Textio: Enterprise writing-optimisation platform that measures the impact of recruiting and marketing language. Comparable to U31 in using data-driven scoring to improve business outcomes from written content.

Emerging players

• QuillBot: AI paraphrasing and rewriting tool that overlaps with U31's text-simplification and reformulation features, though broader in scope (summarisation, translation) rather than a dedicated plain-language platform.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/u-31

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

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 U31