tandler.com

What tandler.com does

tandler.com GmbH is a German software company headquartered in Buch am Erlbach, Lower Bavaria, that develops ++SYSTEMS, a modular GIS-based platform for urban hydrology and water management. The platform integrates specialized modules covering hydrodynamic calculation of canal and water supply networks (HYDRAULIK/DYNA, Aqua), 2D surface runoff simulation for heavy rainfall and flood protection (GeoCPM), pollutant load calculation (Flow), network control (Control), condition assessment and rehabilitation planning (KASANOVA), 3D visualization (Geo3D), mobile field documentation (BetriebToGo), construction billing (KANABIS), and municipal asset/cost management (KOSTEN/WERT). The product integrates with QGIS, ESRI Shape, DXF, Vestra (AKG), AquaZIS, and the DWA M 150-1 XML exchange standard.

The company primarily serves municipal water utilities and communal water management authorities in the DACH region (Germany and Austria), with engineering firms as a secondary buyer segment. Revenue is generated through software license and subscription sales, training and webinar programs, project support consulting, and recurring remote technical support services; pricing is quote-based rather than publicly disclosed. Distribution is direct-to-customer via the company website, supplemented by industry event presence (notably IFAT trade shows in a joint booth with BGT) and an active content marketing and webinar funnel.

Founded in 1985 (per firmographics) and led by co-founders Reinhard Tandler and Angela Tandler as Managing Directors, tandler.com remains founder-owned with no disclosed external investors, no parent company, and no subsidiaries. The firm invests in collaborative R&D, including the state-funded KISS research project on precipitation runoff modeling and the Raindrop consortium with Kompetenzzentrum Wasser Berlin, ÖSTAP, and BOKU Wien on rainwater treatment facility calculation, signaling a continued commitment to scientific grounding in a niche but infrastructure-critical domain.

Name

tandler.com

Legal name

tandler.com GmbH

Website

https://www.tandler.com

Company type

Private

Founded year

1985

Operating status

Operating

Headcount range

11–50 employees

Short description

tandler.com offers software development services.

Ownership category

akta.pro rank

Product category

Urban Hydrology and Water Management Software

NAICS

Custom Computer Programming Services (541511), Water, Sewage and Other Systems (2213)

SIC

Services-Computer Programming Services (7371), Water Supply (4941)

akta.pro primary industry

Water Quality & Watershed/Hydrologic Modeling (SWMM/HEC-RAS, Flood/Runoff/Nutrient) (EUAHAKAF)

akta.pro secondary industries

Hydraulic Modeling & System Optimization (Calibration, Minimum Night Flow, Demand Analysis) (EUANAKAM), Real-Time Monitoring & Smart Stormwater (Sensors, SCADA/IoT, RTC) (EUANAEAK), Water Supply & Wastewater Utilities Administration (BPAIACAG)

Keywords

• Water management software
• Urban hydrology software
• Sewer network calculation
• Flood protection modeling
• Municipal infrastructure GIS

Headquarters

HQ city

Buch Am Erlbach

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Software

Cost components

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

Revenue model

1. Software Licenses and Subscriptions: Tandler sells modular software licenses for their ++SYSTEMS platform including individual modules for GIS, hydraulics, flood calculation, condition assessment, and cost management. The software is offered as a complete solution for municipal water management.
2. Training Services: The company provides training sessions and webinars to educate customers on using their software products effectively.
3. Project Support: Consulting and project support services for implementation and optimization of water management solutions.
4. Technical Support: Remote support services for ongoing customer assistance with their software installations.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

tandler.com develops and sells ++SYSTEMS, a modular GIS-based software platform for urban hydrology and municipal water management. The platform covers hydrodynamic calculation of sewer and water supply networks, 2D surface runoff simulation for flood protection, pollutant load modelling, condition assessment and rehabilitation planning, asset/cost management, construction billing, and mobile field documentation, supported by project consulting, training, and remote technical support.

Product overview

tandler.com offers ++SYSTEMS, a modular software platform for urban hydrology and water management. The platform consists of a core GIS system with multiple specialized modules: HYDRAULIK (DYNA) for hydrodynamic canal network calculations, GeoCPM for 2D surface runoff simulation during heavy rain events, Flow for pollution load calculations, Control for network steering/simulation, Aqua for drinking water network calculations, KASANOVA for condition assessment and rehabilitation planning, Geo3D for 3D visualization, BetriebToGo as a mobile field documentation solution, KANABIS for construction billing, and KOSTEN/WERT for asset management. The platform serves municipal utilities, engineering firms, and water management authorities across Germany.

Differentiator

Problem solved

Functional benefit

Brands

• ++SYSTEMS: Modular GIS-based software solution for urban hydrology and water management, including network calculation, surface runoff simulation, condition assessment, and asset management.
• BetriebToGo
• GeoCPM
• HYDRAULIK (DYNA)
• Flow
• Control
• Aqua
• KASANOVA
• KOSTEN
• KANABIS

Products and services

• ++SYSTEMS Modular GIS-based software platform for all tasks in urban hydrology, covering sewer and water supply network calculation, planning, surface runoff simulation, management, condition assessment, rehabilitation, and operation; sold to municipal utilities, water authorities, and engineering firms.
• HYDRAULIK (DYNA) Hydrodynamic and hydrological calculation of sewer canal networks for urban drainage systems; used by municipal utilities and engineering planners to verify hydraulic capacity.
• GeoCPM 2D hydrodynamic surface runoff calculation module for heavy rainfall and flood protection, used by municipalities to model urban surface flooding scenarios.
• Flow Hydrodynamic pollutant load (Schmutzfracht) calculation for drainage systems following DWA A102; used by municipal utilities and planners for wastewater quality modelling.
• Control Canal network control module for managing and simulating control systems in drainage networks; used by municipal wastewater operators.
• Aqua Hydrodynamic calculation of water supply networks for drinking water distribution systems; used by municipal water utilities for network simulation.
• KASANOVA Condition assessment, evaluation, and rehabilitation planning module for canals and drainage infrastructure, incorporating AI-driven automated assessment; used by municipal sewer operators.
• Geo3D 3D visualisation module for terrain models and canal systems within ++SYSTEMS; used by engineers and planners for spatial analysis and presentation.
• BetriebToGo Mobile version for path-based documentation in canal operation and field data collection; used by municipal operations teams for asset and inspection records.
• KANABIS Billing of construction services for pipeline installation in civil engineering projects; used by utilities and contractors for pipeline construction accounting.
• KOSTEN (WERT) Recording and management of fixed assets for municipal facilities, including cost and asset management; used by municipal finance and asset management departments.

Segments1 record

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration7 records

AI capability3 records

Feature10 records

Partnerships

Four partnerships are on record, tiered core and minor.

• Kompetenzzentrum Wasser BerlincoreStrategic or Co-development Partner · 1 April 2026Collaborative partnership in the Raindrop research project for new approaches to calculating rainwater treatment facilities. Joint meetings held in Berlin to advance the project's methodology.
• ÖSTAP (Österreichische Spatenalpenvereine)minorStrategic or Co-development PartnerAustrian research partner collaborating on the Raindrop project for rainwater calculation methodologies.
• BOKU Wien (Universität für Bodenkultur Wien)minorStrategic or Co-development PartnerAustrian university partner participating in the Raindrop research initiative for rainwater treatment plant calculations.
• BGT (Bundesverband Grabenlos)coreChannel Partner/ Reseller/ DistributorJoint exhibition partnership at IFAT 2026 trade show. BGT operates a communal booth where tandler.com presents their software solutions to visitors at Hall C3, Stand 529.

Scale indicators1 record

Recent moves6 records

Expansion highlights6 records

Broad incumbents

• Bentley Systems: Global infrastructure engineering software provider whose OpenFlows / WaterGEMS / SewerGEMS products directly compete with tandler.com's HYDRAULIK, AQUA, and FLOW modules for hydraulic network modeling, while offering a much broader portfolio spanning roads, bridges, and BIM.
• Autodesk (InfoWorks / InfoDrainage): Global design/BIM platform whose InfoWorks ICM and InfoDrainage products provide 1D/2D hydraulic and stormwater modeling; competes with tandler.com for the same municipal customers but is anchored in a much broader AEC software portfolio.

Direct peers

• DHI (MIKE Powered by DHI): Danish water-environment modeling vendor whose MIKE+ / MIKE URBAN+ platform covers hydrodynamic sewer, storm, and water supply modeling in the same use cases as tandler.com ++SYSTEMS; both target municipal water utilities with 1D/2D coupled modeling.
• KISTERS: German software vendor offering hydroFOSS, BelVis, and KISTERS 3S for hydraulic modeling, flood forecasting, and water resources management — a direct DACH-headquartered competitor to tandler.com with overlapping municipal and engineering firm customers.
• Barthauer Software: German infrastructure asset management software vendor with Barthauer.BaSYS covering sewer network management, condition assessment, and rehabilitation planning — closely overlapping with tandler.com's KASANOVA and KOSTEN modules in DACH municipal utilities.
• Rehm Software: German water management software specialist offering solutions for hydraulic calculations, sewer network planning, and GIS-based asset management — a regional direct competitor to tandler.com serving similar municipal utilities in DACH.
• XP Solutions (Innovyze / Autodesk): Provider of XPSWMM and XPStorm for 1D/2D urban stormwater and wastewater modeling (now under Autodesk); overlapping use cases with tandler.com's HYDRAULIK, GeoCPM, and FLOW modules for municipal drainage networks.
• HydroCAD Software Solutions: US-based vendor of HydroCAD for stormwater modeling and detention pond design — a focused competitor in the stormwater/flood modeling segment that overlaps with tandler.com's GeoCPM module use cases for municipal drainage.

Others

• Esri (ArcGIS + ArcGIS Pro): Dominant GIS platform provider whose ArcGIS software forms the spatial data backbone for many water utilities — tandler.com integrates via QGIS/ESRI Shape formats, making Esri a complementary infrastructure vendor and indirect competitor for the GIS component of ++SYSTEMS.
• QGIS (QGIS.org): Open-source GIS platform that tandler.com explicitly uses for data preparation (integration with ++SYSTEMS); a key enabling technology in their pipeline rather than a competitor, but an open-source alternative that could limit pricing power of the GIS layer.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/Kanalnetzberechnung
• LinkedInlinkedin.com/company/tandler-com-gmbh
• Instagraminstagram.com/tandler.com_official

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 tandler.com