Winter Partners

What Winter Partners does

Winter Partners AG is a Zurich-based private banking software company founded in 1972 by two Swiss engineers. The company develops and sells Rainbow, a proprietary 5th-generation real-time integrated banking software platform covering end-to-end workflows for private banks, asset managers, and small-to-midsize financial institutions. Rainbow's functional scope spans app and online banking, trade and order processing, portfolio management, general ledger and accounting, and a dynamic e-banking layer with smartphone app support. The platform is built on a microservices architecture layered over Service Oriented Architecture (SOA) and N-tier design, is database-independent, and supports multi-branch, multi-currency, parameter-driven deployments.

The firm operates a dual-hub model: Zurich (Seefeldstrasse 104) serves as headquarters for consulting, sales, and marketing, while Cairo handles R&D, Middle East activities, and application distribution. Revenue is generated through three streams: licensing of the Rainbow software platform, one-time fees for custom software development and implementation, and professional services for IT consulting (requirement engineering, project management, strategic road-mapping, and technical rollouts). The client base of 16+ financial institutions includes J.P. Morgan, Nomura, Commerzbank, Raiffeisen, Kuwait Investment Company, and GIC, with active engagement across US/Europe, the Middle East, and Asia Pacific.

Winter Partners is a privately held Swiss Aktien Gesellschaft (AG) with no parent company, no external funding, and no public listing. It runs a lean organization of 1-10 employees led by CEO Christine Mattes and co-founder Jürg Winter, relying on direct enterprise sales and relationship-driven engagement rather than wide marketing distribution. The company's differentiation is a niche combination of six generations of in-house banking software, multi-decade consulting expertise, and a Swiss quality positioning supported by a cost-effective Cairo delivery centre.

Name

Winter Partners

Legal name

Winter Partners AG

Website

https://wipar.ch

Company type

Private

Founded year

1972

Operating status

Operating

Headcount range

1–10 employees

Short description

Winter Partners AG is a Zurich-based private banking software firm that develops and sells Rainbow, a 5th-generation banking platform for private banks, asset managers, and midsize financial institutions, combining proprietary software with strategic IT consulting across global financial capitals.

Ownership category

akta.pro rank

Headquarters

HQ city

Zürich

HQ country

Switzerland

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Software

Revenue model

1. IT Consulting Services: Strategic IT consulting services for financial institutions including requirement engineering, project management, strategic road-mapping, and technical rollouts. Blends banking and IT expertise to guide financial institutions through transformations.
2. Software Development and Implementation: Custom software development and implementation for the financial sector, including cloud-based banking services and modular solution designs.
3. Rainbow Banking Software Platform: Proprietary banking software platform offered as a turnkey solution. Modular application suite covering all private wealth management requirements.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

Winter Partners AG develops and licenses the Rainbow banking software platform, a modular, real-time integrated banking system for private wealth management, portfolio management, general ledger accounting, and multi-channel e-banking. The company also provides strategic IT consulting, requirement engineering, project management, and technical rollout services for financial institutions. Its offerings are tailored for private banks, small to midsize financial institutions, and independent asset managers.

Product overview

Winter Partners AG offers a single unified product platform called Rainbow, a modular banking software suite. Rainbow provides end-to-end processing from app/online banking to general ledger, comprehensive portfolio management (strategies, order entry, trade entry, position monitoring, fees calculation), general ledger and accounting capabilities, and a dynamic e-banking platform with secure online access and real-time processing. The platform is built on a flexible microservices architecture enabling custom, parameterized implementations with short time-to-market.

Differentiator

Problem solved

Functional benefit

Brands

• Rainbow: Proprietary modular banking software platform developed by Winter Partners AG, covering end-to-end trade processing, portfolio management, general ledger and accounting, dynamic app and e-banking platform, and multi-channel wealth management solutions. Rainbow V3.0 features a microservices architecture, revisited User Interface, and smartphone app design.
• Rainbow V3.0

Quantifiable outcome

• Successfully completed over 55 projects across 7+ financial capitals
• +3 more outcomes

Named customers6 records

Segments3 records

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Scale indicators8 records

Recent moves6 records

Expansion highlights6 records

Emerging players

• Thought Machine: Thought Machine provides a cloud-native core banking engine (Vault) used by tier-1 banks such as Lloyds, ING, and Standard Chartered. It represents the new generation of born-in-the-cloud core banking vendors competing for the same modernisation mandates that Winter Partners targets with Rainbow V3.0.
• Mambu: Mambu is a cloud-native, composable core banking platform serving challenger banks, neobanks, and digital lenders. As Winter Partners' private bank clients increasingly evaluate cloud-native architectures, Mambu is an emerging alternative bidder, particularly for greenfield digital wealth ventures.
• 10x Banking: 10x Banking is a cloud-native core banking platform used by incumbents such as JPMorgan and Westpac for next-generation banking services. It competes for the cloud-first modernisation mandates that increasingly divert budget away from traditional on-prem vendors like Winter Partners.

Regional players

• TietoEVRY: TietoEVRY is a Nordic-headquartered IT services and banking software vendor with strong presence across the Nordics and adjacent markets. It is a comparable regional alternative to Winter Partners for mid-sized banks seeking a combined software and consulting partner in Northern Europe.

Direct peers

• Avaloq: Avaloq is a Swiss-headquartered core banking and wealth management platform vendor focused on private banks and asset managers - an almost identical target customer profile to Winter Partners. Its full-stack offering competes head-on with Rainbow in the same private banking RFP processes.
• Profile Software: Profile Software is a Greek banking software vendor offering core, treasury, and wealth solutions to banks and financial institutions across Europe and the Middle East. Its target customers and geographies overlap directly with Winter Partners' private bank and midsize institution focus.
• Temenos: Temenos is one of the largest pure-play banking software vendors globally, with a full core banking and wealth management suite spanning retail, private, and universal banks. It is the most directly comparable competitor for core system replacement mandates at private banks and midsize institutions.

Broad incumbents

• Finastra: Finastra is a large financial software vendor combining the legacy Misys and D+H franchises across retail, corporate, and wealth banking. It competes with Winter Partners on enterprise software deals at larger institutions where a single-vendor suite is preferred over specialised platforms.
• FIS: FIS is a global financial technology incumbent offering core banking, capital markets, and wealth solutions under brands including FIS Private Cloud. It is a direct competitive presence in the same private banking software RFPs as Winter Partners.
• Sopra Banking Software: Sopra Banking Software is a European banking software vendor covering digital, core, and risk systems for banks across Europe, the Middle East, and Africa. Its private banking and wealth modules overlap with Winter Partners' Rainbow offering in similar geographies.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/winter-partners

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 Winter Partners