# Samuli Sirén

> Samuli Sirén is a Series A investor at Redstone.VC (Berlin) backing Software and SaaS. See 18 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [Redstone.VC](https://shizune.co/investors/profile/redstone-digital-gmbh)
- Location: Berlin, Germany
- Total investments: 18
- Last investment: May 2021
- Lead investor: 33%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/samulisiren/
- X (Twitter): https://twitter.com/SamuliRedstone
- Website: http://www.redstone.vc
- Facebook: https://www.facebook.com/samuli.siren

Samuli Sirén is a Series A investor at Redstone.VC in Berlin focused on Software and SaaS. Samuli Siren is the co-founder and Managing Partner of Redstone, a Berlin-based Venture Capital firm managing multiple venture capital funds. Before founding Redstone in 2014, he built and ran the Corporate Venture Capital devision of the Klingel Group. Prior to that was founder of the M&A boutique Finfortec.Having also started variousinternet companies in his early career, Samuli has been part of the German and European technology ecosystem for over 25 years.

## Round sizes

| Stage | Round size |
| --- | --- |
| Seed | $2.1M–$3.5M |
| Series A | $1.6M–$7.9M |

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Software | 8 | 44% |
| SaaS | 4 | 22% |
| Enterprise Software | 4 | 22% |
| Information Technology | 4 | 22% |
| FinTech | 3 | 17% |

51 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Series A | 8 | 44% |
| Funding Round | 4 | 22% |
| Seed | 3 | 17% |
| Series B | 2 | 11% |

### Country

| Country | Investments | Share |
| --- | --- | --- |
| Germany | 15 | 83% |
| Austria | 1 | 6% |
| Saudi Arabia | 1 | 6% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Palturai | Palturai provides visualization tools and business intelligence, using data exclusively from official sources. | $4.9M | Series A | May 17, 2021 |  |
| Acatus | Acatus is a financial services company that offers a debt capital markets platform for banks and other organizations. It offers a refinancing option via capital markets that helps family offices and pension funds. Acatus was founded in September 2016 and headquartered in Berlin, Germany. | $1.6M | Series A | Nov 11, 2019 |  |
| ROOBEO GmbH | ROOBEO is the digital marketplace for building materials In cooperation with numerous assortment, delivery and data partners, we create real added value and process optimization for our customers. | $2.1M | Series A | May 13, 2019 |  |
| Hypatos | AI Agents for Global Business ProcessesScale without headcount growth with AI agents that carry out end-to-end processes in P2P & O2C, while humans orchestrate, lead, decide. Hypatos automates friction points at critical buyer-supplier moments to remove the costliest 10% exceptions blocking true touchless execution. With proprietary GBSexpertise, transparent agentic reasoning & pre-configured integrations, we deploy in weeks, deliver 90%+ straight-through automation, and elevate GBS to a business enabler instead of just a cost center. Our solutions: - Invoice processing - Tax coding and compliance - Delivery notes automation - PO confirmations - Dunning letter automation - Sales order management - Cash application - Contract accountingFor GBS teams with non-standard document types, custom ERP landscapes, or specific process requirements, we configure agents to fit your exact workflows - without long implementation cycles.Hypatos gets you on the fast track to value: - 90%+ straight-through processing - 6-9 Mo. ROI - $4 global savings per $1 spend - 20x productivity: from 50 to 1000 documents FTE/day | $3.5M | Seed | Dec 01, 2018 |  |
| Remind.me | Remind.me is the new reminder service for periods of notice! With remind.me you will never miss an opportunity to optimize your contracts. You will be reminded of us in time and optionally get even the best deals that are on the market, offered as alternatives. In addition, you can order us to provide you with the cheapest electricity and / orgas tariff from now on. remind.me went live in October 2017 and is run by the remind me GmbH in Berlin. Founder & CEO are Daniel Engelbarts & Christian Lang. You already founded Sparwelt.de in 2008 and expanded it into Germany's largest bargain and voucher portal. The media group RTL Germany bought the company in September 2014.With the new portal remind.me they now want to give you the opportunity to increase the savings potential of at least € 1,700 per year and from now on only to have favorable and good contracts. For you as a consumer / user, the portal is completely free. They finance through agency commissions, which they receive from dealers / partners, when you make a corresponding conclusion. As already at Sparwelt.de they always act true to the motto: Always the cheapest / best offer for the user. The commission level has no influence on the selection. | $2.1M | Seed | May 02, 2018 |  |
| PlanRadar | PlanRadar offers a SaaS solution for documentation and communication in construction and real estate projects (e.g. construction documentation, task and defect management. due diligence, etc.).Today, there are in each real estate project on average 1-2 issues per 100ft². PlanRadar's solution with web access and native apps for all kinds ofmobile devices (iOS, Android, Windows) supports the user in recording, documentation, communication, and tracking of any kind of information.Project & site managers, architects & planners, specialists, technicians, property &facility managers or investors and owners can record any kind of information (e.g. tasks, defects, ec.) in a cost & time-saving way directly on the site with their tablet or smartphone and assign them in real-time to responsible project stakeholders.PlanRadar has already more than 7,000 customers and more than 60,000 users from 45 different countries worldwide. Thousands of our users save already 7 working hours every single week. |  | Series A | May 12, 2017 |  |
| figo | figo aggregates financial sources from over 3,100 banks and financial institutions to enable innovative services. As Europe’s first “Banking­ Service ­Provider” figo is PSD2 ready! figo’s sophisticated platform ‘Banking­ as­ a­ Service’ connects modern services with more than 55 million online banking accounts in Germany and Austria. The company istargeting the Single Euro Payments Area (SEPA) in total. Furthermore figo has set up a new connectivity standard to financial data and reduces complexity of banking implementation to a minimum figo makes banking usable wherever it adds value and creates new touch points between consumers and their partners ­ startups and banks! figo realized the opportunities arising from PSD2 accompanied by changing customer expectations. figo does not only provide an established banking API, but also an entire banking service platform supporting a vast number of innovative banking solutions (incl. access to bank account). | $7.1M | Series B | Mar 24, 2017 |  |
| Cobrainer | Cobrainer is a Munich-based data analytics company that applies concepts of machine learning and natural language processing to the analysis, management and visualization of expertise. Originating in a research project at TU Munich Cobrainer was founded in 2013 by a team of engineers envisioning a fast and easy way for people to find and connect toall kinds of expertise.In today’s world new products and technologies are increasingly being developed by small, temporary project teams. In this project-based environment a new type of currency is emerging that is rapidly gaining value and transaction volume: expertise. By building and continuously expanding the world’s largest expertise distribution data map, Cobrainer creates the platform for tracking, managing and allocating expertise effortlessly and rapidly. Their expertise technology is being put to work for some of the world’s most innovative companies and we’re not stopping there. | $7.9M | Series A | Mar 08, 2017 |  |
| EDITION F GmbH | EDITION F is the digital home for business women, offering inspirational business and lifestyle content, job options, fashion and products as well as a strong network to build the career they want. | $559K |  | Jan 01, 2017 |  |
| SMACC | SMACC is an online accounting software for Small and Medium Enterprises to manage their businesses & boost productivity. SMACC has five major modules to manage the business processes of any enterprise. SMACC accounting software has benefited many small and medium enterprises, specifically startups by reducing annual costs and by allowing themto fully concentrate on their core business development and business processes rather they messed up in the IT infrastructure problems and issues.Another major benefit of the SMACC cloud accounting software is that upgrades are totally free, frequent and instant but on the other hand, on-premise software development cycles are very lengthy as compared to cloud-based accounting software.If you’re using any on-premise accounting software in your organization then you should give a try to a SMACC cloud accounting software and you’ll see the difference in few weeks that how it has impacted your business processes and transformed it to a more profitable. |  | Series A | Jan 01, 2017 |  |

10 of 18 investments shown.

## Co-investors
- [Berliner Volksbank Ventures](https://shizune.co/investors/profile/berliner-volksbank-ventures) — VC Fund, 5 deals together
- [IBB Ventures](https://shizune.co/investors/profile/ibb) — VC Fund, 2 deals together
- [Redstone.VC](https://shizune.co/investors/profile/redstone-digital-gmbh) — VC Fund, 2 deals together
- [Vogel Ventures](https://shizune.co/investors/profile/vogel-ventures-2) — VC Fund, 2 deals together
- [Charité Biomedical Fund](https://shizune.co/investors/profile/charit%C3%A9-biomedical-fund) — VC Fund, 1 deal together
- [DB1 Ventures](https://shizune.co/investors/profile/db1-ventures) — VC Fund, 1 deal together

## About Redstone.VC

VC Fund · Berlin, Germany

Redstone is a European venture capital firm following selected investment strategies. Our focused approach with specialized investment teams for each strategy has enabled us to develop strong sector expertise and networks. This combination supercharges our portfolio companies. We’ve spent a decade building the world’s leading proprietary startupanalytics and data platform, SOFIA, allowing us to make evidence-based and data-driven investment decisions.

5 contacts available at Redstone.VC.

| Name | Title | Profile |
| --- | --- | --- |
| Lucas Paul | Investment Team Member | https://shizune.co/investors/profile/lucas-paul |
| Marco Stutz | Partner, Redstone Switzerland | https://shizune.co/investors/profile/marco-stutz |
| Michael Brehm | Founding Partner | https://shizune.co/investors/profile/michael-brehm |
| Mickael Bellaiche | Partner | https://shizune.co/investors/profile/mickael-bellaiche |
| Anastasia Gonotskaya | CTO | https://shizune.co/investors/profile/anastasia-gonotskaya |

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## FAQ

### What does Samuli Sirén invest in?

Samuli Sirén invests primarily in Software, SaaS and Enterprise Software startups, most often at Series A and Funding Round stage. Most of the 18 investments tracked by Shizune back companies in Germany. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### What is Samuli Sirén's check size?

Samuli Sirén typically joins rounds of $2.1M–$3.5M at Seed and $1.6M–$7.9M at Series A. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Samuli Sirén participates in.

### When did Samuli Sirén last invest?

The most recent investment recorded for Samuli Sirén closed in May 2021. Shizune tracks 18 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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