About

Identity
Focus
Philosophy
Story

Sievestone is a multidisciplinary investment firm operating at the convergence of intelligent capital and enduring value.

With offices in Cyprus and Greece, we work across domains—backing high-potential startups, managing diverse property portfolios, and supporting curated lifestyle and hospitality experiences.

Our name blends two foundational ideas:

  • Sieve, inspired by the Sieve of Eratosthenes, represents intelligent filtering—extracting clarity from complexity, whether in ideas, opportunities, or investment decisions.
  • Stone evokes stability, substance, and long-term structure—reflected in our focus on ventures that deliver enduring, real-world value.

This duality defines us: clarity in complexity, strength in execution.

We invest with intention, develop with care, and seek out projects—digital or physical—that are built to last.

Our approach blends strategic insight with hands-on execution—identifying opportunities where technological innovation, thoughtful design, and long-term potential intersect. From intelligent systems to architectural restoration and curated hospitality, we invest in ventures that are built to last.

Guided by a philosophy of clarity, selectivity, and substance, we bring precision to decision-making and purpose to everything we build.

*Focus* Sievestone is a multidisciplinary investment firm operating at the convergence of intelligent capital and enduring value.

With offices in Cyprus and Greece, we work across domains—backing high-potential startups, managing diverse property portfolios, and supporting curated lifestyle and hospitality experiences.

Our name blends two foundational ideas:

  • Sieve, inspired by the Sieve of Eratosthenes, represents intelligent filtering—extracting clarity from complexity, whether in ideas, opportunities, or investment decisions.
  • Stone evokes stability, substance, and long-term structure—reflected in our focus on ventures that deliver enduring, real-world value.

This duality defines us: clarity in complexity, strength in execution.

We invest with intention, develop with care, and seek out projects—digital or physical—that are built to last.

Our approach blends strategic insight with hands-on execution—identifying opportunities where technological innovation, thoughtful design, and long-term potential intersect. From intelligent systems to architectural restoration and curated hospitality, we invest in ventures that are built to last.

Guided by a philosophy of clarity, selectivity, and substance, we bring precision to decision-making and purpose to everything we build.

* philosophy * Sievestone is a multidisciplinary investment firm operating at the convergence of intelligent capital and enduring value.

With offices in Cyprus and Greece, we work across domains—backing high-potential startups, managing diverse property portfolios, and supporting curated lifestyle and hospitality experiences.

Our name blends two foundational ideas:

  • Sieve, inspired by the Sieve of Eratosthenes, represents intelligent filtering—extracting clarity from complexity, whether in ideas, opportunities, or investment decisions.
  • Stone evokes stability, substance, and long-term structure—reflected in our focus on ventures that deliver enduring, real-world value.

This duality defines us: clarity in complexity, strength in execution.

We invest with intention, develop with care, and seek out projects—digital or physical—that are built to last.

Our approach blends strategic insight with hands-on execution—identifying opportunities where technological innovation, thoughtful design, and long-term potential intersect. From intelligent systems to architectural restoration and curated hospitality, we invest in ventures that are built to last.

Guided by a philosophy of clarity, selectivity, and substance, we bring precision to decision-making and purpose to everything we build.

* story *Sievestone is a multidisciplinary investment firm operating at the convergence of intelligent capital and enduring value.

With offices in Cyprus and Greece, we work across domains—backing high-potential startups, managing diverse property portfolios, and supporting curated lifestyle and hospitality experiences.

Our name blends two foundational ideas:

  • Sieve, inspired by the Sieve of Eratosthenes, represents intelligent filtering—extracting clarity from complexity, whether in ideas, opportunities, or investment decisions.
  • Stone evokes stability, substance, and long-term structure—reflected in our focus on ventures that deliver enduring, real-world value.

This duality defines us: clarity in complexity, strength in execution.

We invest with intention, develop with care, and seek out projects—digital or physical—that are built to last.

Our approach blends strategic insight with hands-on execution—identifying opportunities where technological innovation, thoughtful design, and long-term potential intersect. From intelligent systems to architectural restoration and curated hospitality, we invest in ventures that are built to last.

Guided by a philosophy of clarity, selectivity, and substance, we bring precision to decision-making and purpose to everything we build.

Real asset portfolio management

Acquiring, managing, and optimizing property investments.

Property Allocation – Investing in diversified investments across different locations and property types including residential, commercial, and hospitality.

Asset Acquisition & Disposition – Identifying, evaluating, and acquiring properties with growth potential, and selling assets to optimize portfolio performance.

Tenant & Lease Management – Securing quality tenants, negotiating lease agreements, and maintaining occupancy rates to ensure stable income generation.

Risk Management – Analyzing market conditions, regulatory risks, and economic factors to safeguard investments against downturns and unforeseen challenges.

Renovations - Upgrading interiors and exteriors as well as energy efficiency through structural improvements, utility upgrades, and aesthetic enhancements to enhance functionality, safety, and design.

Our current real asset portfolio comprises a diversified mix of commercial, residential, and hospitality properties strategically located in key urban and leisure destinations, including Athens (Greece), Nicosia (Cyprus), and select locations across the Cyclades islands. Each investment is selected for its long-term value potential, architectural character, and relevance to local market dynamics, reflecting Sievestone’s commitment to sustainable growth and design-led development.

Architectural Vision by Gelly Dimitrakopoulou

Our projects are shaped by the creative direction of Gelly Dimitrakopoulou, Sievestone’s principal architect. With a refined eye for context, form, and materiality, Gelly brings together contemporary design and local character—ensuring each space is not only functional, but emotionally resonant and environmentally sensitive. Her work anchors our portfolio in timeless aesthetics and thoughtful craftsmanship. Check our award winning K69 renovation project

Private equity investments

Investing in innovative tech-driven AI and software startup companies.

Capital Allocation and Technical Due Diligence –
Identifying startups with strong AI models, scalable software solutions, and market potential, while assessing technical feasibility and risks.

Investment & Portfolio Growth –
Providing capital in exchange for equity and supporting startups in product development, go-to-market strategies, and scaling operations.

Value Creation & Strategic Mentorship –
Offering industry expertise, connecting startups with talent, and guiding AI/software companies on data strategy, regulatory compliance, and business scaling.

Portfolio

We invest in forward-thinking technology companies that apply advanced AI, automation, and system design to solve real-world problems. Our current portfolio includes:

Acutecare.ai

An AI-powered clinical platform improving decision-making and workflows in acute care settings. From ICUs to operating rooms, AcuteCare.ai supports clinicians with intelligent triage, risk prediction, and context-aware automation.

DDPit.com

A B2B procurement and supply-chain platform designed for efficiency, transparency, and automation. DDPit enables smart tenders, real-time cost optimization, and intelligent analytics—streamlining cross-border trade and inventory management.

Conscium.com

A research-driven platform advancing agent-based AI evaluation and alignment. Conscium builds tools and methodologies to verify, stress-test, and scale multi-agent systems—focusing on trust, safety, and explainability in next-gen AI.

Sievesoft.com

Sievesoft delivers advanced AI solutions and consulting services that create measurable, real-world impact. Leveraging expertise in large-scale optimization, LLM-powered systems, and intelligent automation, the company helps clients across logistics, healthcare, retail, and financial services harness AI effectively—bridging technical innovation with practical deployment.

Enigma Venture Holding

KYN a consumer facing AI driven match service that allows users to find perfect matches for their interests and activities.

Musiconomy.ai

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Architectural Vision by Gelly Dimitrakopoulou

Our projects are shaped by the creative direction of Gelly Dimitrakopoulou, Sievestone’s principal architect. With a refined eye for context, form, and materiality, Gelly brings together contemporary design and local character—ensuring each space is not only functional, but emotionally resonant and environmentally sensitive. Her work anchors our portfolio in timeless aesthetics and thoughtful craftsmanship. Check our award winning K69 renovation project

Lifestyle and Leisure Ventures

At Sievestone, we believe that meaningful investments go beyond assets—they shape experiences, elevate communities, and enrich everyday life. Our Lifestyle & Leisure Ventures reflect this philosophy, focusing on curated hospitality and destination-driven concepts that embody authenticity, aesthetic excellence, and sustainable impact. Whether through fine dining, boutique spaces, or cultural retreats, we support projects that celebrate place, foster connection, and deliver lasting value to both visitors and local communities.
A recent example is Pomelo, a contemporary restaurant located in Batsi, Andros. Set in a tranquil Cycladic setting overlooking the bay, Pomelo offers a refined interpretation of Mediterranean cuisine, combining locally sourced ingredients with modern culinary techniques. Sievestone’s investment in Pomelo underscores our commitment to supporting ventures that embody mindful travel, elevated gastronomy, and island heritage—helping position Andros as a destination for thoughtful leisure and authentic experiences.