What Cosuno does

Cosuno operates an AI-based tendering marketplace for the construction services industry, headquartered in Berlin and incorporated as Cosuno Ventures GmbH. Founded in 2018, the company connects construction clients — general contractors, project developers, and architects — with a network of 280,000+ qualified subcontractors through two core products: the Cosuno Marketplace, where clients publish tenders and receive qualified bids, and the Subcontractor Directory, a searchable database of contractors enabling discovery by trade and location. The platform claims to be the largest of its kind, processing 4,000+ monthly tenders with an average contract value of €250,000, and reports that clients achieve 30% more bids and 5.7% average savings in construction costs.

The underlying technology stack combines an AI-powered tender matching engine with AI-assisted bid creation tools for contractors, applied primarily to text-based tender specifications and contractor capability profiles. Distribution is product-led: clients self-serve to publish tenders, contractors self-serve to discover and bid on projects, and a publicly indexed directory drives SEO-based discovery. Revenue is generated through marketplace commissions on tender flow, though no specific pricing tiers, take rates, or ARR figures are publicly disclosed. The customer base spans 600+ top publishing clients across diverse German construction trades, including enterprise names such as KOESEA Gruppe, RECON Europe, Hering Management, Saller Group, ALDI Immobilienverwaltung, Diringer & Scheidel, Peter Gross Hochbau, and AUG. PRIEN Bauunternehmung.

Cosuno has raised approximately $45M+ across disclosed funding rounds, including a $30M Series A in February 2022 led by Avenir with participation from Cherry Ventures and Spark Capital, and a prior $15.24M round led by Spark Capital in May 2021. The company is led by co-founders Christoph Berner and Fritz Cramer (co-managing directors) and Maximilian Seifert (co-founder and CTO). Operations are concentrated in the DACH region with a bilingual English/German interface signaling broader European intent, and the company has begun layering adjacent services such as B2B payments via a December 2025 partnership with Mondu.

Name

Cosuno

Legal name

Cosuno Ventures GmbH

Website

https://cosuno.de

Company type

Private

Founded year

2018

Operating status

Operating

Headcount range

101–250 employees

Ownership category

akta.pro rank

Product category

Construction Tender Management / Construction Tech Marketplace

NAICS

Wholesale Trade Agents and Brokers (425)

SIC

Services-Employment Agencies (7361)

akta.pro primary industry

Contractor of Record (COR) / Global Contractor Management (BPACAHAE)

akta.pro secondary industry

Compliance, Risk & Supplier Due Diligence (KYC/ESG/Sanctions) (BPAAAJAK)

Keywords

• Construction tendering platform
• Subcontractor marketplace
• AI bid matching
• Construction procurement software
• Tender management software

Headquarters

HQ city

Berlin

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Software

Cost components

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

Revenue model

1. Marketplace Platform Fees: Platform connects tendering clients with contractors, generating revenue from the marketplace transaction flow

Go-to-market motion1 record

Distribution channels2 records

Marketing channels3 records

Core offering

Cosuno operates an AI-based two-sided tendering marketplace for the construction industry. Construction clients (general contractors, project developers, real-estate owners) publish bid packages on the Cosuno Marketplace and receive qualified bids from a network of 280,000+ subcontractors, with AI-driven tender matching and automated workflows delivering 30% more bids and 5.7% average cost savings. Subcontractors access 4,000+ monthly tenders from 600+ top clients, use AI-assisted bid creation, and win contracts averaging €250,000 in value.

Product overview

Cosuno operates as an AI-based tendering platform for the construction industry, consisting of two core interconnected products: the Cosuno Marketplace for publishing and managing tenders, and the Subcontractor Directory for discovering and vetting qualified contractors. The platform connects over 600 top client companies with a network of 280,000+ qualified subcontractors, facilitating approximately 4,000+ monthly tenders with an average contract value of €250,000.

Differentiator

Problem solved

Functional benefit

Products and services

• Cosuno Marketplace AI-based digital marketplace where construction clients publish bid packages for construction trade work (cleaning, flooring, demolition, fire protection, electrical, drywall, waterproofing, etc.) and receive qualified bids from a network of 280,000+ subcontractors. The platform handles 4,000+ monthly tenders with an average contract value of €250,000 and uses AI to automate tender matching, qualification screening, and bid workflows. Target users are construction companies, general contractors, project developers, real-estate owners, and architects on the client side, and subcontractors on the supply side.
• Subcontractor Directory Comprehensive searchable directory of 280,000+ qualified subcontractors and construction companies, filterable by trade, location, and capabilities. Enables construction clients to discover, vet, and select potential contractors for their projects, and acts as the SEO/discoverability surface for the broader Cosuno platform.

Quantifiable outcome

• 30% more bids for clients using the platform
• +3 more outcomes

Named customers8 records

Segments2 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability3 records

Feature3 records

Partnerships

One partnership is on record.

• MonduminorGTM or Marketing Partner · 18 December 2025Cosuno is featured as an existing partner of Mondu, a B2B payment solutions provider. Cosuno provides testimonials about the value of Mondu's payment solutions for B2B commerce. The partnership enables Cosuno to offer integrated payment options to construction contractors using their platform.

Scale indicators6 records

Recent moves5 records

Expansion highlights4 records

Market position

Weaknesses5 records

Competitive moat4 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Funding overview

Funding rounds3 records

Investors5 records

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 Cosuno