Sten Tamkivi
Angel Investor @ Plural Platform
San Francisco, United States
Sten Tamkivi is a seed investor at Plural Platform in San Francisco focused on Software and Financial Services. Sten Tamkivi is the Chief Product Officer at Topia (formerly MOVE Guides). He was previously co-founder and CEO of Teleport (acquired by Topia), the place to scout for startup people. He co-founded the company as an EIR at Andreessen Horowitz.Sten has been a tech entrepreneur since 1996. After founding a few companies in Estonia, he joined Skypeas an early executive, ran the original R&D office, and held several global product leadership roles for 8+ years.He has an MS in Management from Stanford GSB.
- Total investments:
- 49
- Last investment:
- Lead investor:
- 33%
Last updated:
For AI agents: llms.txt
Industries Sten Tamkivi invests in
Stages Sten Tamkivi invests in
Countries Sten Tamkivi invests in
Round sizes
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Round size
- Seed
- $540k–$20M
- Pre-Seed
- $120k–$2.5M
- Series A
- $7.4M–$35M
Investment Focus
Industry
- Software 10 (20%)
- Financial Services 7 (14%)
- Manufacturing 6 (12%)
- Artificial Intelligence 6 (12%)
- FinTech 4 (8%)
Stage
- Seed 14 (29%)
- Series A 12 (24%)
- Pre-Seed 8 (16%)
- Series B 4 (8%)
- Series C 3 (6%)
Country
- Estonia 15 (31%)
- United States 11 (22%)
- United Kingdom 4 (8%)
- The Netherlands 3 (6%)
- Finland 2 (4%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| Monumental develops autonomous robotics and software systems for the construction industry, with a focus on automating on-site masonry and building workflows. Its technology combines a fleet of autonomous robots with Atrium, an integrated software platform that plans, coordinates, monitors, and manages robotic construction activities. The companydesigns and operates its robotics hardware, machine vision systems, and software to enable robots to work alongside construction teams on active job sites. Its solutions support tasks such as bricklaying, site mapping, project planning, progress tracking, and quality monitoring through a unified digital workflow. Monumental deploys its technology on residential, commercial, and infrastructure construction projects to improve the consistency and efficiency of repetitive building processes while integrating with existing construction practices. | $32M / Series B / Jul 15, 2026 | ||
| CircuitHub provides on-demand electronics manufacturing services focused on printed circuit board assembly and rapid hardware production workflows. The company offers automated quoting, component sourcing, PCB fabrication, assembly management, and order tracking through a web-based platform that integrates with electronic design automation files.Its manufacturing system supports prototype builds, low-volume production, and batch manufacturing for hardware development teams working in robotics, aerospace, automotive, and industrial electronics. CircuitHub also develops software-driven factory processes and inventory management tools that help customers manage parts procurement, production status, and design iteration cycles. | $28M / Series A / May 20, 2026 | ||
| Frankenburg Technologies aims to develop missile systems that are ten times more affordable, a hundred times faster to produce, and in quantities far exceeding current industry capabilities. | $35.4M / Series A / Feb 24, 2026 | ||
| Arcjet helps developers protect their apps in just a few lines of code. Implement rate limiting, bot protection, email validation, and defense against common attacks. | $8.5M / Series A / Oct 08, 2025 | ||
| We are a team of veterans, humanitarians, software engineers, cloud infrastructure and blockchain specialists unified by a single mission: To help our clients in the public and private sector optimise how they can manage globally distributed networks of people and teamsWe help clients in the private and public sectors eliminate the frictionsassociated with remotely managing global networks of people and communities. To do this, we are building the world's first unified, secure and integrated platform for scaling team and programme management at reach. At Labrys we deliver two types of services for our customers in the public and private sector:• A Software-as-a-Service (SaaS) offering, where our clients take our software and manage their own global teams and programmes• A Managed Service, where we use our software and unique global access to manage client requirements and programmes | $20M / Series A / Jun 03, 2025 | ||
| Pixieray modernizes traditional eyeglass optics by introducing a pioneering adaptive solution giving anyone perfect vision. | Series A / Apr 28, 2025 | ||
| IXI was founded in 2021 in Espoo, Finland, with a simple premise: to create eyewear that provides optimal vision in every situation. Using cutting-edge technology, IXI glasses intelligently adapt to your eye movements, automatically focusing to help you see more—sharper—all within beautifully designed frames. Their first-generation product iscurrently in development, with more details to follow closer to launch. Sign up for early access here: https://ixieyewear.com | $36.5M / Series A / Apr 28, 2025 | ||
| Asteroid mining has lived at the intersection of scientific research and popular culture for decades, with as many academic papers published as there are books, TV shows and movies about it. Access to resources, with its finite nature and disparate distribution of resources, plays an essential part in the geopolitical web of power and wealth. Ithas defined economic growth to such an extent that we have been using them as primary demarcation lines and identifiers in our history, from the stone to bronze and iron age to our current silicon age. But our resources-driven growth faces a massive existential challenge, with climate change, ecosystem degradation and resource depletion demanding a complete reset. Humanity needs to shift global transportation, manufacturing, construction and energy onto a sustainable path. Expanding beyond the Kármán line is where we believe transformative future growth and innovation will be found. Recent missions by NASA (OSIRIS-REx & DART) and JAXA (Hayabusa2) have firmly pushed the idea of using space resources from academic research into commercial opportunity. We believe the Regolith Age, powered by abundant space resources, is an inevitability that we can accelerate. | $20M / Seed / Feb 19, 2025 | ||
| VSPARTICLE develops nanoparticle generators for various applications such as sensors, batteries, catalysis, solar cells, healthcare, additive manufacturing, nano safety, and more. It also enables research and industry to generate new materials at the push of a button.They specialize in nanoparticle production and integration. The technologyspeeds up the developments of customers by producing the desired nanoparticles on location and integrate them directly in the final product. VSPARTICLE was founded in 2014 and is headquartered in Delft, The Netherlands. | $7.1M / Series A / Aug 08, 2024 | ||
| Monumental develops autonomous robotics and software systems for the construction industry, with a focus on automating on-site masonry and building workflows. Its technology combines a fleet of autonomous robots with Atrium, an integrated software platform that plans, coordinates, monitors, and manages robotic construction activities. The companydesigns and operates its robotics hardware, machine vision systems, and software to enable robots to work alongside construction teams on active job sites. Its solutions support tasks such as bricklaying, site mapping, project planning, progress tracking, and quality monitoring through a unified digital workflow. Monumental deploys its technology on residential, commercial, and infrastructure construction projects to improve the consistency and efficiency of repetitive building processes while integrating with existing construction practices. | $25M / Seed / Feb 15, 2024 | ||
| See all 49 investments → | |||
Co-Investors
About Plural Platform
Plural Platform is an early-stage venture capital firm.
Plural Platform Contacts
| Name | Phone | Socials | |
|---|---|---|---|
Pierre-Dimitri Gore-Coty
Partner
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Victoria Kennard
Head of Platform + Operations
|
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Carina Namih
General Partner
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Taavet Hinrikus
Partner
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FAQ
What does Sten Tamkivi invest in?
Sten Tamkivi invests primarily in Software, Financial Services and Manufacturing startups, most often at Seed and Series A stage. Most of the 49 investments tracked by Shizune back companies in Estonia. The Investment Focus section breaks down every industry, stage and country in the portfolio.
What is Sten Tamkivi's check size?
Sten Tamkivi typically joins rounds of $540k–$20M at Seed, $120k–$2.5M at Pre-Seed and $7.4M–$35M 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 Sten Tamkivi participates in.
How do I contact Sten Tamkivi?
Public channels for Sten Tamkivi include LinkedIn, X (Twitter) and the website linked on this profile. For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.
When did Sten Tamkivi last invest?
The most recent investment recorded for Sten Tamkivi closed in Jul 2026. Shizune tracks 49 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 Sep 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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