ONSEI

What ONSEI does

ONSEI (legal entity Onsei GmbH) is a Berlin-based, privately held software company building an agentic AI platform purpose-built for hospitality guest communication and operations. The platform is composed of five cooperating AI agents — a multilingual Voice Agent (handling phone inquiries and bookings 24/7 in 25 languages), a Messaging Agent (covering website, WhatsApp and other messaging channels), an Email Agent (integrated with Microsoft 365 and Gmail), a Reservation Check (validating OTA bookings against the PMS), and a Commission Check (automating OTA-to-PMS commission reconciliation) — together with an Analytics Dashboard and a centrally managed, multi-property Knowledge Base. The architecture integrates natively with leading hospitality PMS platforms (Mews, Apaleo, Oracle Opera Cloud, LikeMagic, HotelPartner, HotelNetSolutions), enabling direct reservation placement, real-time availability checks, and audit-log transparency for multi-property hotel groups.

The company sells through a sales-led, demo-driven enterprise GTM motion targeting hotel groups and multi-property hospitality operators, primarily in the DACH region. Pricing is subscription-based and annual but quote-only; the company does not publicly disclose pricing tiers. Named customers span a range of property types from luxury resorts (Castanea Resort, Titanic Hotels) to hotel groups (Halbersbacher, Göbel, Titanic), conference and boutique hotels (Kongresshotel Potsdam, Hotel Am Augustinerplatz), budget operators (McDreams), and serviced apartments (recognized via SO!APART!). Distribution is complemented by thought-leadership content, organic social, and presence at industry events such as the IHA, SO!APART! and Travel Start-Up Night.

ONSEI employs 1-10 people and reports no disclosed funding rounds; institutional support is via the SpinLab accelerator, EU Just Transition Fund (JTF) co-financing through Freistaat Sachsen, and industry association endorsements (IHA, SO!APART!). The company is led by co-founder and CEO Jochen Emig. Operating geographies publicly cited are Europe and EMEA. Notable disclosures include 100% GDPR compliance (open-source models, EU data hosting), 69%+ of calls automated by AI, and 24/7 availability metrics that serve as product proof points rather than financial indicators.

Name

ONSEI

Legal name

Onsai GmbH

Website

https://onsei.de

Company type

Private

Founded year

2016

Operating status

Operating

Headcount range

1–10 employees

Short description

Onsei (Onsei GmbH) is a Berlin-based agentic AI company that automates hospitality guest communication and operations through multilingual voice, messaging, email, and reservation/commission agents, serving hotel groups and serviced apartment operators with deep PMS integrations.

Ownership category

akta.pro rank

Product category

Hospitality AI Software

NAICS

Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (518)

akta.pro primary industry

Lodging & Vacation Rental Booking Platforms (BPAMAIAC)

Keywords

• Hospitality AI automation
• AI guest communication agents
• Voice AI for hotels
• PMS integration software
• OTA reconciliation tools

Headquarters

HQ city

Berlin

HQ country

Germany

HQ region

Europe

Markets served

GTM type

B2B

Offering type

Software

Cost components

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

Revenue model

1. AI Agent Subscriptions: SaaS subscription model for AI agents providing guest communication automation. Multi-property ready with scalable pricing across hotel brands.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

ONSEI provides an agentic AI platform that automates guest communication and operational workflows for hotels and hospitality operators. The offering centers on five AI agents — Voice Agent (24/7 multilingual phone calls in 25 languages), Messaging Agent (AI chat across website and WhatsApp), Email Agent (automated guest email responses with live PMS data), Reservation Check (OTA-to-PMS booking validation), and Commission Check (automated OTA commission reconciliation) — connected natively to leading property management systems.

Product overview

ONSEI is an Agentic AI platform for the hospitality industry offering a comprehensive suite of intelligent communication agents across multiple channels. The core product portfolio consists of five AI agents: Voice Agent (24/7 multilingual phone conversations), Messaging Agent (AI-powered chat across website, WhatsApp, and messaging platforms), Email Agent (automated guest email responses integrated with Microsoft 365 and Gmail), Reservation Check (automated OTA-to-PMS booking validation), and Commission Check (automated commission reconciliation). The platform also includes an Analytics Dashboard for real-time insights and a Knowledge Base for managing AI training data. All agents share native integrations with leading hospitality PMS platforms (Mews, Apaleo, Opera Cloud, LikeMagic, HotelPartner, HotelNetSolutions) and are supported by centralized multi-property management capabilities.

Differentiator

Problem solved

Functional benefit

Products and services

• Voice Agent AI-powered voice agent that answers calls 24/7 in 25 languages, handling guest inquiries, taking bookings, and serving hotel guests with natural multilingual phone conversations.
• Messaging Agent AI-powered conversational agent that handles guest communications across hotel website, WhatsApp, and messaging platforms with contextual, always on-brand interactions.
• Email Agent AI agent that automatically answers incoming guest emails using live PMS data, integrated with Microsoft 365 and Gmail.
• Reservation Check Automated validation tool that checks OTA reservations against the hotel PMS, catches discrepancies, and corrects faulty bookings before they cause operational issues.
• Commission Check Automated reconciliation tool that reconciles OTA commission statements against hotel PMS records, turning hours of manual work into minutes and saving approximately 75% of processing time.

Quantifiable outcome

• 69%+ of calls automated by AI agents
• +2 more outcomes

Named customers8 records

Segments3 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration9 records

AI capability9 records

Feature8 records

Partnerships

Four partnerships are on record, tiered core and minor.

• MewscoreTechnology or IntegrationOnsai is an integrated solution on the Mews Marketplace, providing intelligent guest communication, revenue management integration, and personalized concierge service for Mews-using hotels. Scalable multi-property operations with complete audit-log transparency.
• ApaleocoreTechnology or IntegrationNative PMS integration with Apaleo platform for seamless guest communication and operational data synchronization.
• Opera CloudcoreTechnology or IntegrationNative integration with Opera Cloud PMS enabling AI-powered guest communication for Oracle Opera-using properties.
• SpinLabminorStrategic or Co-development PartnerAccelerator program supporter providing startup ecosystem support and mentorship.

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Emerging players

• PolyAI: Voice-AI platform for enterprise customer service, including hospitality deployments. Horizontal competitor at the voice-AI layer; less hospitality-specialized than Onsai but well-funded.

Direct peers

• Asksuite: AI-powered guest communication and booking assistant for hotels and hotel chains. Directly overlapping value proposition in reservations and lead conversion via web/WhatsApp.
• HiJiffy: Portuguese AI guest communication platform offering chatbots, voice, and messaging agents for hotels. Most direct competitor to Onsai across channels and customer segment.
• Viqal: European AI voice agent purpose-built for hotels to handle calls, bookings, and guest requests in multiple languages. Closely comparable voice-first product, similar regional footprint.
• Akia: AI guest experience platform for hotels providing automated messaging, check-in, and upsell workflows. Comparable vertical SaaS play in hospitality communication automation.
• Easyway (now part of Lighthouse): AI-driven guest messaging platform for hotels and resorts, covering pre-stay, in-stay, and post-stay communications. Comparable product surface and target buyer to Onsai's Messaging and Email Agents.
• Kips AI (formerly Kips Chatbot): Hospitality-focused AI assistant handling guest inquiries, bookings, and upsells via web and messaging channels. Comparable vertical AI for hotels targeting similar mid-market and enterprise operators.

Broad incumbents

• TrustYou: Guest intelligence platform for hotels combining surveys, reviews, and messaging. Overlaps with Onsai on guest communication and feedback analytics; broader portfolio positioning.
• Revinate: Established guest relationship and communication platform for hotels, including messaging and reputation. Comparable customer segment and broader functionality; potential consolidator of Onsai's niche.
• SoundHound for Hospitality: Publicly-listed voice-AI vendor with a dedicated hospitality product for restaurant and hotel ordering/inquiries. Well-capitalized horizontal competitor that could pressure Onsai's voice-agent positioning.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/onsei-gmbh
• Instagraminstagram.com/onsai.intelligence
• Xx.com/onsei_berlin

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 ONSEI