Custom AI solutions production
Scroll downAn AI agency in Paris, Gensai designs custom AI agents, chatbots and voice agents, connected to your data, with responsible, sovereign and frugal AI. For SMEs, cultural institutions, agencies, non-profits and large companies: a first prototype in 2 to 3 weeks, then a reliable move to production, useful automations and concrete productivity gains.
Analysis of your processes to spot where AI creates the most value: automation, access to information, customer experience.
From POC to production: solutions designed with low-code and sovereign technologies, tailored to your challenge.
Team training and integration into your existing tools, for scale-up and lasting productivity gains.
Every project combines innovation, technical expertise, agility and long-term support.
The latest AI technologies, with genuine care for design and UX: intuitive interfaces that are a pleasure to use.
A multidisciplinary team and recognised partners, for reliable, innovative and scalable solutions.
An agile method that adapts to your constraints: every solution is tailored to answer the need precisely.
End-to-end follow-through, from needs analysis to production, with training and ongoing support.
Gensai offers digital services integrating AI: web and mobile applications, workflows and AI agents to automate your processes, improve customer experience or launch new digital services, always custom-built.
Autonomous, sovereign, custom agents that run your processes
Appointment booking, document analysis, reporting, actions in your tools: AI agents framed by guardrails, hosted in France or in Europe.
Learn more →Conversational assistants that answer correctly, from your own content
AI chatbots connected to your data (RAG), on your website, WhatsApp or internally: sourced answers, no hallucination, for your customers, your visitors and your teams.
Learn more →Voice agents that listen, understand and answer out loud
Real-time voice agents, callbots, kiosk voicebots and AI avatars: phone reception, museums, events, controlled latency, down to fully on site.
Learn more →Specific developments, from automation to robotics
AI integration into your tools, process automation, audio, image, robotics and training: a first use case validated in 2 to 3 weeks.
Learn more →Discover the latest projects designed to meet each client's specific needs. From applications to intelligent search engines and AI chatbots, each solution combines innovation and personalization.
Gensai also builds its own products: SaaS solutions designed with industry experts, ready to deploy in your organisation. Feel free to visit the websites and contact us to learn more.
The AI agent that answers for you
An AI agent that takes your calls 24/7: it understands every request, books appointments, qualifies emergencies and sends a clear summary. Hosted in France, GDPR compliant.
Visit the website →Your team's food and wine pairing cheat sheet
AI that backs your dining-room teams: food-wine pairings suggested in real time, wine recommendations to complete your cellar, sales analysis and stock tracking.
Visit the website →AI for culture, tourism and events
The generative agent for culture, events and tourism that answers, informs, guides and delivers augmented storytelling, built on a sovereign knowledge base.
Contact us →Each project follows a structured and collaborative approach, ensuring innovative and tailored digital solutions. From needs analysis to production deployment, every step guarantees quality and successful adoption.
Needs analysis and goal definition in collaboration with clients to establish the foundation of the project.
Creation of mockups, technical architectures, and intuitive interfaces tailored to the defined expectations.
Development of solutions using optimal technologies, ensuring performance, security, and scalability.
Testing, optimization, and production deployment, ensuring sustainable evolution of the solutions.
Responsibility sits at the heart of every project: GDPR and AI Act compliance, frugal and ethical AI, digital sovereignty and environmental responsibility guide our technical choices.
Gensai is listed among the trusted AI companies mapped by Hub France IA, and is a France Num Activator within France Num, the government initiative led by the Directorate General for Enterprise.
Gensai masters a wide range of technologies and favors responsible and sovereign solutions to develop tailor-made, innovative projects that comply with ethical and regulatory requirements.
Mastery of LLMs (Large Language Models), SLMs (Small Language Models) and RAG (Retrieval-Augmented Generation), backed by vector databases such as Pinecone and FAISS, addresses a wide range of needs: natural-language search, content generation, process automation. Architectures proven on our projects: sovereign answer engines, fully local voice installations, WhatsApp chatbots, intelligent phone answering agents.
On the technology side: orchestration components for AI agents, LiveKit and real-time APIs for voice, and the best models on the market, Mistral, Claude, OpenAI, Gemini, or Gradium for voice AI. For hosting, sovereign clouds such as Scaleway and OVHcloud first, Azure and AWS when needed, down to On Premise or On Device deployment when the data demands it. Development in Python or Java, favouring open source and low-code.
Gensai 玄才, a Japanese term created with generative AI, combines 玄 (gen), meaning “mysterious” and “profound,” with 才 (sai), which conveys “talent” or “ability.” Gensai translates to “mysterious talent.”
The Gensai AI agency was founded by Jérôme Reminiac and Sébastien Lecocq, a duo of enthusiasts who have been collaborating for years to develop innovative and high-performance digital solutions.
A digital communication expert who honed his skills at TBWA, Jérôme founded the Ketsu agency in 2012, then completed an MBA in AI project management at the Institut Léonard de Vinci. His strategic vision keeps every project focused on business value.
LinkedIn →A digital entrepreneur, Sébastien first excelled in web and mobile development before specialising in artificial intelligence. He designs Gensai's custom AI architectures, and is an expert in vibe coding.
LinkedIn →An AI agency designs, builds and puts into production artificial intelligence solutions for businesses: chatbots, AI agents, answer engines, automations. Where a consulting firm recommends and a software vendor sells the same tool to everyone, an agency delivers a working solution adapted to each client's business, data and constraints. Gensai is an AI agency based in Paris.
Gensai builds four families of custom solutions: AI agents that automate business processes, chatbots and answer engines that answer from the company's documents, voice AI solutions (voice agents, callbots, avatars) and custom AI solutions for needs that do not fit the mould. Team training and use-case identification complete the offer.
As a guide, at Gensai, a POC (proof of concept) on real data costs between €3,000 and €5,000 excluding VAT. An MVP, a first version teams can use, is between €5,000 and €10,000 excluding VAT, not including hosting and model usage. The amount depends on the integrations required. A 30-minute call is enough to frame the need and price the project.
A POC usually takes 2 to 3 weeks. Moving to an MVP or to production then takes 1 to 3 months, depending on the integrations required. Working in stages makes it possible to check the value of the solution on real data before committing a larger budget.
With a precise, frequent and measurable use case: a repetitive task, a time-consuming search for information, recurring requests. Gensai runs a use-case identification workshop that ranks them by value and feasibility, then validates the approach on a first case. The article First AI project for an SME: how to spot a good quick win? describes the method.
In business as in events, culture or leisure, an answer has to be accurate. Gensai relies on RAG for this: the AI answers from a knowledge base validated by the client, not from its memory alone. An AI-augmented narrative for a museum or a tourist site must not invent anything: when the information is not in its sources, the AI knows how to say it cannot answer. Test sets built from real questions check this behaviour before any production release.
For most projects, in France, with Scaleway or OVHcloud. Depending on requirements, the solution can also run on the client's own servers or locally, with no Internet connection. Data remains the client's property and is never used to train third-party models. Projects are carried out in compliance with the GDPR and the AI Act.
It depends on the project and the contract. A custom development can be handed over to the client. A solution sold as a product, on a subscription basis, remains Gensai's property.
Gensai has delivered around fifty AI projects for SMEs, mid-sized companies, large groups and institutions, in healthcare, culture and events, the public sector, the liberal professions and the non-profit world. Every sector can be concerned. Twelve case studies are detailed on the website.
No. The agency is based in Paris, in the 10th arrondissement, and has offices in Savoie, at La Toussuire. It works with clients across France, from Brittany to Occitanie. Gensai is a France Num Activator and is listed in the 2026 Hub France IA mapping.
gensai.ai
