Bulgaria has quietly become one of Eastern Europe’s most exciting technology hubs. A country of under 7 million people now hosts multiple billion-dollar tech companies, a thriving Sofia startup ecosystem, and one of the fastest-growing IT workforces in the European Union. In 2026, that momentum is visible where it matters most: company valuations.
In this guide, we rank the ten biggest tech companies in Bulgaria by market capitalization and estimated valuation, explain how each earned its place, and unpack what their rise says about the Bulgarian tech sector as a whole.
How We Ranked These Companies (Methodology)
Transparency first. Market capitalization only formally applies to publicly traded companies, and Bulgaria has a relatively small number of listed tech firms — most trade on the Bulgarian Stock Exchange (BSE) in Sofia, and the largest, Shelly Group, is dual-listed in Frankfurt. To build a genuinely useful top 10, we combined:
- Live market capitalization data for publicly listed companies, drawn from the Bulgarian Stock Exchange, Deutsche Börse, and financial data providers such as TradingView, Investing.com, and StockAnalysis (figures verified as of mid-2026).
- Most recent disclosed or reported valuations for privately held companies, based on funding rounds, M&A activity, and credible financial press coverage.
Two important caveats: market caps fluctuate daily, so treat every figure as an approximate snapshot rather than gospel; and private-company valuations are estimates that may have shifted since their last funding event. Where numbers are uncertain, we say so.
The Top 10 Biggest Tech Companies in Bulgaria at a Glance
| Rank | Company | Sector | Approx. Market Cap / Valuation (2026) | Status |
| 1 | Shelly Group | IoT / Smart Home | ~€2.3 billion | Public (Frankfurt + BSE) |
| 2 | Payhawk | Fintech / Spend Management | ~$1 billion+ | Private (unicorn) |
| 3 | Chaos | 3D Rendering Software | ~$1 billion (est.) | Private |
| 4 | SiteGround | Web Hosting | Several hundred million $ (est.) | Private |
| 5 | Sirma Group Holding | Enterprise Software | ~€50–75 million | Public (BSE) |
| 6 | Telelink Business Services | IT Infrastructure & Cybersecurity | ~€60–65 million | Public (BSE) |
| 7 | Software Group | Fintech Infrastructure | Estimated tens of millions $+ | Private |
| 8 | Dronamics | Cargo Drones / Logistics Tech | Estimated $100M+ (funding-based) | Private |
| 9 | Tiger Technology | Hybrid Cloud Data Management | Estimated tens of millions $ | Private |
| 10 | Bianor Holding | Software Development & AI | Small cap (BSE-listed) | Public (BSE) |
Now let’s look at each company in depth.
- Shelly Group — Bulgaria’s €2+ Billion IoT Champion
Sector: Smart home & IoT devices | HQ: Sofia | Listed: Frankfurt Stock Exchange & Bulgarian Stock Exchange (ticker: SLYG)
No company better symbolizes Bulgaria’s tech ascent than Shelly Group, formerly known as Allterco. The company designs and sells smart home and energy-management devices — relays, plugs, sensors, and controllers — sold in more than 100 markets worldwide, with a product philosophy built around affordability and open integration.
The numbers are remarkable. Shelly’s market capitalization climbed to roughly €2.3 billion in early 2026, up around 90% in a single year, after crossing the $1 billion “unicorn” threshold in mid-2025 and becoming Bulgaria’s second tech unicorn. In April 2026, Shelly was included in Germany’s SDAX index, which tracks the 70 largest German-listed companies below the DAX and MDAX — a landmark moment for a Bulgarian-founded business.
Why it matters: Shelly proved a Bulgarian hardware company could scale globally, list on a major European exchange, and reward public-market investors handsomely. It is, by a wide margin, the biggest tech company in Bulgaria by market cap.
- Payhawk — The Fintech That Made Bulgaria a Unicorn Country
Sector: Fintech / corporate spend management | HQ: Sofia & London | Status: Private
Payhawk became Bulgaria’s first unicorn in 2022 when its Series B extension pushed its valuation past $1 billion, with backing from investors including Lightspeed Venture Partners and Greenoaks. The company combines corporate cards, expense management, invoice payments, and accounts-payable automation into a single spend-management platform used by scaling businesses across more than 30 countries.
Its engineering heart remains in Sofia, and its rise put Bulgarian fintech firmly on the map for global venture capital.
Why it matters: Payhawk demonstrated that a Bulgarian-founded software company could compete head-to-head with well-funded Western rivals in one of fintech’s most crowded categories — and win enterprise customers doing it.
- Chaos — The Rendering Engine Behind Hollywood and Architecture
Sector: 3D visualization & rendering software | HQ: Sofia (with global offices) | Status: Private
If you’ve admired a photorealistic architectural render or a blockbuster visual effect, there’s a fair chance Chaos technology was involved. Founded in Sofia in 1997, Chaos created V-Ray, one of the world’s most widely used rendering engines, honored with an Academy Award (Sci-Tech) for its contribution to filmmaking.
In 2022, Chaos merged with German visualization firm Enscape in a deal backed by TA Associates that reportedly valued the combined group at well over a billion dollars, creating one of the largest players in global 3D visualization. Exact current valuation figures aren’t public, which is why we present this as an estimate — but by any reasonable measure, Chaos ranks among Bulgaria’s most valuable tech companies.
Why it matters: Chaos is the elder statesman of Bulgarian tech — proof that world-class deep software IP has been built in Sofia for nearly three decades.
- SiteGround — A Global Web Hosting Powerhouse
Sector: Web hosting & cloud services | HQ: Sofia | Status: Private (bootstrapped)
SiteGround is one of the world’s best-known independent web hosting providers, serving millions of domains and long recommended within the WordPress ecosystem. Founded in Sofia in 2004, it grew without venture capital into a company with over a thousand employees and infrastructure spanning multiple continents.
Because SiteGround is privately held and famously discreet about financials, no official valuation exists. However, based on its scale, recurring-revenue model, and typical hosting-industry multiples, analysts generally place its worth in the hundreds of millions of dollars — enough to earn a confident top-five position on this list.
Why it matters: SiteGround is Bulgaria’s great bootstrapping success story: global scale achieved with no outside funding.
- Sirma Group Holding — The Veteran of the Bulgarian Stock Exchange
Sector: Enterprise software & AI | HQ: Sofia | Listed: Bulgarian Stock Exchange (ticker: SGH)
Founded in 1992, Sirma Group is one of the oldest and largest software groups in Southeast Europe, operating through more than 20 subsidiaries. Its portfolio spans fintech platforms for banks (including open-banking and payments suites), insurance technology, healthcare software, and engineering tools such as the EngView Packaging Suite.
As a BSE-listed blue chip and SOFIX index constituent, Sirma’s market cap is fully transparent — and volatile. Over the past year it has swung considerably: its capitalization more than doubled into early 2026 before retreating, with recent figures in roughly the €50–75 million range depending on the trading day.
Why it matters: Sirma is the bellwether of Bulgaria’s listed tech sector and a rare example of a homegrown software group with 30+ years of continuous operation.
- Telelink Business Services — IT Infrastructure and Cybersecurity Leader
Sector: IT infrastructure, cloud & cybersecurity | HQ: Sofia | Listed: Bulgarian Stock Exchange (ticker: TBS)
Telelink Business Services (TBS) delivers IT infrastructure solutions — compute, storage, networking, public cloud, and modern workplace — alongside managed services and an advanced Security Operations Center that detects and mitigates cyberattacks for enterprise clients. Listed on the BSE since 2020, TBS carries a market capitalization of roughly €60–65 million as of mid-2026 and has been expanding regionally across the Balkans.
Why it matters: As enterprises and governments across Southeast Europe digitize, TBS sits directly in the path of regional cloud and cybersecurity spending.
- Software Group — Fintech Infrastructure for the World’s Banks
Sector: Banking & fintech technology | HQ: Sofia | Status: Private
Software Group builds digital banking and agency-banking platforms used by financial institutions in more than 70 countries, with a particular strength in financial inclusion projects across Africa, Asia, and Latin America. Clients have included major banks, microfinance institutions, and development organizations. As a private company its valuation isn’t disclosed, but its global client base and scale make it one of the most substantial privately held tech firms in the country.
Why it matters: Few Bulgarian companies have Software Group’s geographic reach — it’s a quiet giant of financial-inclusion technology.
- Dronamics — The Cargo Drone Pioneer
Sector: Aerospace / logistics technology | HQ: Sofia & London | Status: Private
Dronamics is developing the Black Swan, a long-range cargo drone designed to carry hundreds of kilograms over hundreds of kilometers at a fraction of traditional air-freight costs. It became the first cargo drone airline licensed to operate in Europe and has raised substantial funding — cumulatively well past $100 million across equity and grant financing — implying a valuation comfortably in nine figures.
Why it matters: Dronamics represents Bulgaria’s ambitions beyond software: genuine deep-tech hardware with the potential to reshape middle-mile logistics.
- Tiger Technology — Hybrid Cloud Data Specialists
Sector: Data management software | HQ: Sofia | Status: Private
Tiger Technology has spent over two decades building high-performance file-system and hybrid-cloud data management software used in media production, healthcare, surveillance, and enterprise IT. Its Tiger Bridge product enables seamless tiering between on-premises storage and public cloud. While privately held with undisclosed financials, its longevity, patents, and enterprise customer base earn it a place among Bulgaria’s most valuable independent software vendors.
Why it matters: Tiger is a reminder that Bulgarian tech depth extends into unglamorous but lucrative infrastructure software.
- Bianor Holding — Small Cap, Big AI Ambitions
Sector: Software development & AI | HQ: Sofia | Listed: Bulgarian Stock Exchange
Bianor Holding rounds out the list as one of the few additional pure-tech names investors can actually buy on the Bulgarian Stock Exchange. The company provides custom software development — historically strong in video streaming and media tech, with growing AI and defense-tech initiatives. Its market capitalization sits in small-cap territory, but its BSE listing, acquisitive strategy, and public financials make it a closely watched name in Sofia’s investment community.
Why it matters: Bianor gives retail investors rare direct exposure to Bulgaria’s software services sector.
What These Rankings Reveal About Bulgarian Tech
Three clear themes emerge from this top 10:
Public markets are finally rewarding Bulgarian tech. Shelly Group’s SDAX inclusion and multi-billion-euro valuation would have seemed fantastical a decade ago. Its success creates a template — and investor appetite — for future Bulgarian listings.
Diversity of business models. The list spans consumer IoT hardware, B2B SaaS, rendering engines, web hosting, cargo drones, and banking infrastructure. Bulgaria is not a one-trick outsourcing economy anymore.
A deep talent flywheel. Global giants — VMware (now Broadcom), SAP, HP, and others — have operated large Sofia engineering centers for years, training the very engineers who now found and staff the companies above. Combined with strong STEM education, EU membership, and initiatives like Sofia Tech Park and the INSAIT research institute, the pipeline keeps strengthening.
Frequently Asked Questions
What is the biggest tech company in Bulgaria? Shelly Group is the biggest tech company in Bulgaria by market cap, valued at roughly €2.3 billion in 2026. It is dual-listed on the Frankfurt and Bulgarian stock exchanges and joined Germany’s SDAX index in April 2026.
Does Bulgaria have any unicorns? Yes — Payhawk became Bulgaria’s first unicorn in 2022, and Shelly Group became the second when its market value crossed $1 billion in 2025.
Can I invest in Bulgarian tech companies? Yes. Shelly Group, Sirma Group Holding, Telelink Business Services, and Bianor Holding are all publicly traded and accessible through brokers offering BSE or Frankfurt market access. Always do your own research — small-cap Bulgarian stocks can be volatile and thinly traded.
Why is Bulgaria attractive for tech companies? A skilled, cost-competitive engineering workforce, one of the EU’s lowest corporate tax rates (10%), EU market access, and a mature ecosystem of universities, accelerators, and tech parks centered on Sofia.
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