# Klaus Wecken

> Klaus Wecken is a funding round investor backing Apps, Pet and SEO. See 9 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Total investments: 9
- Last investment: Nov 2024
- Lead investor: 11%
- Last updated: Aug 2026

Klaus Wecken is a funding round investor focused on Apps and Pet. Since 1974, Klaus R. Wecken has been founder, partner and chairman of various companies in Germany and Switzerland. From 1984, he was co-founder and director of KHK Software AG, Frankfurt am Main, which he sold to SAGE Group, Newcastle, UK, in 1997. From 1999, he was co-founder and principal shareholder of the real estate company Tivona AG, Basel,which was integrated through Jelmoli Holding AG, Zurich, into Swiss Prime Site Group in 2009. From 2001 to 2002, he was member of the Board of Directors of Jelmoli Holding AG, Zurich. Since 2007, he has built up more than 40 investments focused on fields such as the Internet, software and medical technology as well as real estate, through his family office Wecken & Cie, Basel. In the stock exchange-listed real estate sector, Klaus R. Wecken is major shareholder in Deutsche Mittelstands Real Estate AG (DEMIRE), Langen bei Frankfurt, (Germany), as well as Adler Real Estate AG, Berlin, (Germany), among other firms. Adler Real Estate AG acquired Fair Value REIT AG, Gräfeling, and Westgrund AG, Berlin (Germany) in previous years. Adler AG also acquired, developed and re-divested Accentro (formerly Estavis) AG, Berlin (Germany), at the end of 2017. Adler AG also acquired 25% of the shares in Conwert Immobilien Invest SE, Vienna (Austria) at the end of 2015 and re-sold the stake to Vonovia AG, Bochum, at the end of 2016.

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Apps | 2 | 22% |
| Pet | 1 | 11% |
| SEO | 1 | 11% |
| SaaS | 1 | 11% |
| VoIP | 1 | 11% |

18 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Funding Round | 5 | 56% |
| Series A | 2 | 22% |
| Series B | 1 | 11% |

### Country

| Country | Investments | Share |
| --- | --- | --- |
| Germany | 5 | 56% |
| Austria | 1 | 11% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| iDWELL | iDWELL (www.idwell.com) is a revolutionary CRM cloud software and tenant app, especially designed for the next generation of real estate management. It enables the automation of routine processes, and bundles as well as optimizes all communication between the stakeholders of a property, including service providers, asset managers, landlords,tenants and property managers. Currently, more than 750,000 apartment units are managed with the assistance of iDWELL.The iDWELL ticketing system and the connected tenant app automates routine maintenance tasks with regards to handling and reporting damages. This allows iDWELL customers to focus on more important and revenue-generating tasks. The iDWELL marketplace provides further opportunities to service tenants and landlords while generating revenue. | $10.9M |  | Nov 04, 2024 |  |
| iDWELL | iDWELL (www.idwell.com) is a revolutionary CRM cloud software and tenant app, especially designed for the next generation of real estate management. It enables the automation of routine processes, and bundles as well as optimizes all communication between the stakeholders of a property, including service providers, asset managers, landlords,tenants and property managers. Currently, more than 750,000 apartment units are managed with the assistance of iDWELL.The iDWELL ticketing system and the connected tenant app automates routine maintenance tasks with regards to handling and reporting damages. This allows iDWELL customers to focus on more important and revenue-generating tasks. The iDWELL marketplace provides further opportunities to service tenants and landlords while generating revenue. |  | Series A | Oct 28, 2021 |  |
| clickworker | With more than 3.6 million freelancers, so-called Clickworkers, in Europe, America and Asia, clickworker is one of the leading providers of paid crowdsourcing. clickworker offers scalable solutions in the areas of training data for AI, text creation, categorization and tagging, surveys, web research, mobile crowdsourcing and product datamaintenance in 18 languages and in more than 30 target markets.clickworker is a full-service provider and offers both standardized and individual solutions for the implementation of its customers' data-oriented projects. These projects are automatically broken down into micro jobs and processed by qualified Clickworkers from the crowd. The results are then reassembled and transmitted to the customer in a quality-assured manner.clickworker also offers a self-service solution via the online marketplace for smaller and standardized tasks in the areas of text creation, surveys and sentiment analysis. These practice-proven procedures offer reliable and high-quality results with high throughput, outstanding scalability and with significant cost savings. | $1.4M |  | Jul 22, 2013 |  |
| clickworker | With more than 3.6 million freelancers, so-called Clickworkers, in Europe, America and Asia, clickworker is one of the leading providers of paid crowdsourcing. clickworker offers scalable solutions in the areas of training data for AI, text creation, categorization and tagging, surveys, web research, mobile crowdsourcing and product datamaintenance in 18 languages and in more than 30 target markets.clickworker is a full-service provider and offers both standardized and individual solutions for the implementation of its customers' data-oriented projects. These projects are automatically broken down into micro jobs and processed by qualified Clickworkers from the crowd. The results are then reassembled and transmitted to the customer in a quality-assured manner.clickworker also offers a self-service solution via the online marketplace for smaller and standardized tasks in the areas of text creation, surveys and sentiment analysis. These practice-proven procedures offer reliable and high-quality results with high throughput, outstanding scalability and with significant cost savings. | $713K |  | Dec 11, 2012 |  |
| Learnship | Learnship has globalized traditional face-to-face language training with a proprietary distance learning technology and has created an innovative Live Teaching Method for online training. The German company’s mission is to help employees communicate in foreign languages in their everyday working life, with highly customized and effectivetrainer-based online training. With their product, Learnship has established itself as an effective alternative to face-to-face onsite training, generating significant cost savings and ROI for clients without compromising on teaching quality. Meanwhile, courses are taught successfully in more than 75 countries around the world at approximately 2,000 European and American corporations. |  |  | Dec 05, 2012 |  |
| ZooRoyal | ZooRoyal is an online platform that offers accessories and supplies for pet dogs, cats, reptiles, horses, fish, and more. Its operations are based in Würselen, Germany. |  |  | Mar 01, 2012 |  |
| simfy | simfy GmbH operates as an online music platform. The company allows to share and store music online, as well as to listen instantly to specific tracks or albums via true on demand streaming. simfy GmbH was founded in 2006 and is based in Cologne, Germany. | $11M |  | May 17, 2011 |  |
| clickworker | With more than 3.6 million freelancers, so-called Clickworkers, in Europe, America and Asia, clickworker is one of the leading providers of paid crowdsourcing. clickworker offers scalable solutions in the areas of training data for AI, text creation, categorization and tagging, surveys, web research, mobile crowdsourcing and product datamaintenance in 18 languages and in more than 30 target markets.clickworker is a full-service provider and offers both standardized and individual solutions for the implementation of its customers' data-oriented projects. These projects are automatically broken down into micro jobs and processed by qualified Clickworkers from the crowd. The results are then reassembled and transmitted to the customer in a quality-assured manner.clickworker also offers a self-service solution via the online marketplace for smaller and standardized tasks in the areas of text creation, surveys and sentiment analysis. These practice-proven procedures offer reliable and high-quality results with high throughput, outstanding scalability and with significant cost savings. | $4.7M | Series B | Mar 22, 2011 |  |
| C2Call | C2Call leads the way in introducing next generation mobile and browser-based calling solutions for the computing cloud. FriendCaller for iOS and Android are built using C2Call SDK, and demonstrate the unique capabilities to establish a peer-to-peer connection with any mobile platform and with any Internet browser without prerequisite softwareinstallations. With the new C2Call SDK, developers would now be able to integrate features alike FriendCaller in their existing or new apps on mobile.**How it began** As the founders and architects of Actai Networks (Singapore, Germany and Taiwan) a mobile Internet solutions development company, Martin Feuerhahn and Michael Knecht experienced firsthand the diversified environments in terms of operating systems, standards, languages and regional preferences while traveling and communicating with customers worldwide. All existing VoIP solutions were closed user group systems and required users to install software, register and exchange ID before a call was possible.**A Striking Idea** Feuerhahn and Knecht decided to create a solution that initiates instantly in any popular browser overcoming all the obstacles which the existing VoIP technologies were up against – including the requirements for both call parties to register and exchange IDs.C2Call is the result:This simple-to-use click-to-call VoIP technology works across diversified environments such as Windows, Mac and Linux, yet easily spans foreign languages and standards globally – with no software or hardware installation required prior to use. Unlike installed clients that easily take upto 50 to 75MB of memory, C2Call does not “hog” memory. C2Call packs the VoIP functionality in a small, temporary 750kb Java applet.FriendCaller.com, powered by C2Call In February 2009, less than one year after start up, the C2Call-powered FriendCaller.com website was released to demonstrate C2Call’s unique capabilities in the Social Networking Space, offering a 100 percent web-based alternative to installed VoIP services such as Skype, MSN, AIM and others.**FriendCaller** can be used to call other FriendCaller users but breaks the “closed system” open with the patent pending Callme links. Callme links connect instantly to anyone on the Internet, whether he or she is a FriendCaller user or not. Callme links can be sent via email, instant message or can be placed on social media profiles and blogs, starting in any popular browser.**FriendCaller App for iOS** The FriendCaller apps for iOS (iPhone, iPod touch and iPad) prove that the original Java-based C2Call technology can be easily ported to other platforms. FriendCaller app for iOS turns the iPhone in a full-fledged WiFi/3G Video VoIP phone. Since the iPhone iOS does not support Java, a native client was developed with the same capabilities of sending universal instant CallMe links that can be opened by any PC browser. The Apple-approved FriendCaller iPhone app can be downloaded on iTunes and works with the original iPhone, iPhone 3G, iPhone 3Gs, iPod touch and iPad (1st and 2nd generation). FriendCaller Video Chat is best suited for iPhone4, iOS 5 or later. After successful and clean results of video calling seen on larger retina display of iPhone 5 and iPod touch, C2Call has recently introduced HD video chat for the new iPad as well.Making 7- way video calling experience ultimately sublime for its users in HD!Comparing C2Call with Skype, AIM, QQ, etc.: The developers of C2Call have created a sensational, unique new product that transcends current VoIP technologies such as Skype, AIM and all others. These services operate only in a “closed system” mode, where communicating parties must install the same software, then exchange user IDs prior to making a connection and speaking. The closed system can never be an “instant” connection. C2Call is an “open” system that instantly provides peer-to-peer communication due to its capability to send the Callme links.Calling Out to the World The FriendCaller website and iPhone users can add call credits to their accounts and call out to the telephone networks of more than 400 countries and territories worldwide. Most phone numbers in popular destinations in North America, Europe and Asia can be called for only 2 cents per minute. Calls are charged by the minute, and no additional “connection fee” or “call set-up fees” apply.**Ready to Grow** The FriendCaller website and all call servers are hosted on Amazon Web services. This cloud computing setup allows full scalability for growth as well as for business applications and support thousands of apps, not only FriendCaller.**SDK launched** With the launch of our SDK for mobile app developers, C2Call is providing access to the “one-click” video calling, voice and messaging functionality, which was only previously available through FriendCaller. By integrating C2Call’s technology into their mobile apps, developers will now be able to have their users communicate across multiple apps, on different platforms using rich communication functionalities.**Bottom-line advantage**Instant calling – worldwide! It doesn’t matter what VoIP software or browser a user has – or if there is any software at all! Users simply click on the link in the email signature of the person requesting a call. Without any software installation , C2Call provides VoIP to begin an instant connection in a browser. **Investors** C2Call GmbH was funded in April 2008 by Martin Feuerhahn and Michael Knecht. One month later it received already international angel funding. Its group of angel investors includes Michael Brehm, former executive director of StudiVZ , Europe’s largest social networking site and Tapesh Sinha, Founder of Acctel Group of companies. In October 2009 the High-Tech Gründerfonds became the lead investor. The High-Tech Gründerfonds is Germany leading start-up venture capital group and is itself backed by six of Germany's largest industrial groups including BASF, Deutsche Telekom, Siemens, Robert Bosch, Daimler and Carl Zeiss. Visit the C2Call / FriendCaller Web site at: www.friendcaller.com for more information.COST: 2 cents/minute = 80-90 percent less than regular calling rates.C2Call is a German-based peer-to-peer VoIP service provider, which powers the popular FriendCaller www.friendcaller.com website. Offering easy-to-use, cost-effective VoIP calling, FriendCaller allows users to instantly connect over the Internet through the company’s patented Callme links. FriendCaller is the first VoIP service available currently that does not require prior software installation, registration or ID exchanges by users.For more information please contact:Martin Feuerhahn, CEO, C2Call Email: info@c2call.com C2Call GmbH, Werl, Germany or visit: www.C2Call.com or | $2M | Series A | Aug 05, 2010 |  |

9 of 9 investments shown.

## Co-investors
- [VCDE Venture Partners](https://shizune.co/investors/profile/venturecapital-de) — VC Fund, 3 deals together
- [Flashpoint](https://shizune.co/investors/profile/flashpointvc) — VC Fund, 2 deals together
- [SeedCapital Dortmund](https://shizune.co/investors/profile/seedcapital-dortmund) — VC Fund, 2 deals together
- [Dumont Venture](https://shizune.co/investors/profile/dumont-venture) — VC Fund, 1 deal together
- [Earlybird Venture Capital](https://shizune.co/investors/profile/earlybird-venture-capital) — VC Fund, 1 deal together
- [KfW](https://shizune.co/investors/profile/kfw) — VC Fund, 1 deal together

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## FAQ

### What does Klaus Wecken invest in?

Klaus Wecken invests primarily in Apps, Pet and SEO startups, most often at Funding Round and Series A stage. Most of the 9 investments tracked by Shizune back companies in Germany. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### When did Klaus Wecken last invest?

The most recent investment recorded for Klaus Wecken closed in Nov 2024. Shizune tracks 9 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly.

### Is Shizune's investor data accurate?

Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.

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