SiPearl
SiPearl designs high-performance CPUs for European supercomputers and data centers, with its first product Rhea1 featuring 80 Arm Neoverse V1 cores and 61 billion transistors. The company has raised $154M and employs 165 people.
The growth story
SiPearl grew from 49 to 165 employees between 2021 and 2026, raising $154M along the way, most recently a Series A in July 2025.
About
SiPearl develops energy-efficient CPUs for supercomputers, AI, and data centers, targeting applications in security, defense, medical research, and climate. Its flagship product, Rhea1, is the most complex CPU ever designed in Europe and is set to power Europe's first exascale supercomputer, JUPITER.
The company, founded in 2019, has grown rapidly, securing $154M in funding and employing 165 people. Its next-generation CPU, Rhea2, will power the Alice Recoque supercomputer, continuing its focus on high-performance computing with reduced environmental impact.
Founders and leadership
SiPearl is led by a team with deep expertise in semiconductor design, with engineering being the largest function, comprising 63 employees. The company operates from its headquarters in Maisons-Laffitte, France.
The SiPearl org chart
Philippe Notton (CEO) leads 39 mapped leaders with 5 direct reports. Click +N to expand a team; names link to the person’s public profile.
Departments, and which ones grew
Headcount by function: Engineering 73 (-5% YoY), Information Technology 28 (+12% YoY), Business Development 10 (-9% YoY), Quality Assurance 8 (0% YoY), Arts and Design 7 (0% YoY), Human Resources 6 (-14% YoY).
Talent flow
SiPearl recruits heavily from STMicroelectronics, Thales, and Intel, with 14, 10, and 9 hires respectively. Alumni often move to Dream Chip Technologies, VSORA, and Arm, indicating a strong network within the semiconductor industry.
Most common previous employers of SiPearl staff: STMicroelectronics (14), Thales (10), Intel (9), Nokia (6), Sierra Wireless (6), CEA (6). Former SiPearl employees most often moved to Dream Chip Technologies (10), VSORA (5), Arm (4), OPENCHIP & SOFTWARE TECHNOLOGIES (3), STMicroelectronics (3), Siemens EDA (Siemens Digital Industries Software) (2).
Alumni worth knowing
Web traffic
Traffic mix: 65% direct, 22% search, 8% social, 0% paid.
What this company is made of
Most common skills at SiPearl: C (Programming Language) (67), C++ (64), Python (Programming Language) (59), Linux (55), Embedded Systems (50), Application-Specific Integrated Circuits (ASIC) (42), English (42), Project Management (37).
Where the team actually sits
SiPearl people are concentrated in Île-de-France, France (42), Greater Paris Metropolitan Region (23), Auvergne-Rhône-Alpes, France (15), France (12). 5 offices on record.
Search footprint
SiPearl attracts about 20 organic search visits a month, traffic worth roughly $0K a month if bought through ads. It gained 1 ranking keywords and lost 3 in the last period.
What employees say
- Compensation
- 3.60 / 5
- Career opportunities
- 4.00 / 5
- Senior management
- 2.90 / 5
- Work-life balance
- 3.90 / 5
Frequently asked
SiPearl has 165 employees as of September 2026.
SiPearl has raised $154M in total, most recently a Series A round in July 2025.
Philippe Notton (CEO) sits at the top of SiPearl's reporting structure, with 5 direct reports.
The most common previous employers of current SiPearl staff are STMicroelectronics (14 people), Thales (10 people), Intel (9 people).
Former SiPearl employees most often move to Dream Chip Technologies (10), VSORA (5), Arm (4).
SiPearl attracts about 20 organic search visits a month, worth roughly $0K a month in equivalent ad spend.
The most common skills among SiPearl staff are C (Programming Language), C++, Python (Programming Language), Linux, Embedded Systems.
SiPearl staff are concentrated in Île-de-France, France (42), Greater Paris Metropolitan Region (23), Auvergne-Rhône-Alpes, France (15).
SiPearl has about 73 people in Engineering, down 5% over the past year, as of September 2026.
SiPearl has about 28 people in Information Technology, up 12% over the past year, as of September 2026.
Computed from 139 current and 125 former SiPearl profiles, as of September 2026. Source: Crustdata.
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