Cellarity
Cellarity is a biotech firm using AI to discover drugs by analyzing cellular dysfunction rather than single targets. It has raised $294M, including a Series C in 2022, and works on metabolic, hematology, and immuno-oncology treatments.
The growth story
Cellarity grew from 96 to 67 employees between 2021 and 2026, raising $294M along the way, most recently a Series C in October 2022.
About
Cellarity develops drugs by studying how entire cells malfunction in diseases, unlike traditional methods that focus on individual molecular targets. Its AI platform analyzes over 30 million single-cell transcriptomes to identify unconventional treatment approaches. The company targets metabolic disorders, blood diseases, and cancer immunotherapy.
The firm has secured funding from investors like BlackRock and Flagship Pioneering, reaching a $294M total. Its 67-person team works across multiple disease areas, though specific growth rates aren't disclosed.
Founders and leadership
Research dominates Cellarity's 67-person team, with 28 staff in that function. The company maintains a median tenure of 2 years, suggesting active rotation among its scientific staff.
The Cellarity org chart
Atli Thorarensen (Chief Scientific Officer) leads 31 mapped leaders with 8 direct reports. Click +N to expand a team; names link to the person’s public profile.
Departments, and which ones grew
Headcount by function: Research 30 (-23% YoY), Business Development 6 (0% YoY), Engineering 4 (-43% YoY), Finance 3 (0% YoY).
Talent flow
Cellarity recruits heavily from pharma giants like Sanofi (5 hires) and Pfizer (4), with alumni often moving to Flagship Pioneering (8) or other drugmakers. Three staff each came from Biogen and Takeda Oncology.
Most common previous employers of Cellarity staff: Sanofi (5), Pfizer (4), Bristol Myers Squibb (4), Biogen (3), Takeda Oncology (3), University of Massachusetts Amherst (3). Former Cellarity employees most often moved to Flagship Pioneering (8), Sanofi (5), Novo Nordisk (4), Merck (4), NVIDIA (3), GSK (3).
Alumni worth knowing
The Cellarity mafia
Seven alumni founded companies, including Pharming (820 staff) and Lamin (21 staff). Others launched smaller biotechs like Collage Bio and Pep2Tango Therapeutics.
8Fabrice Chouraqui, was Executive Chair of the Board of Directors until 2025Alex Wolf, was Senior Director, Head of Scientific Computing until 2022Sunny Sun, was Associate Director, Head of Computational Biology until 2022Poorya Hosseini, was Founding Team until 2021Cristina Rondinone, was President until 2020Matthew Prout, was R&D Engineer until 2020
Michael Retchin, was Founding Team until 2019
Raffi Afeyan, was Vice President Of Product Strategy & Innovation until 2021Web traffic
Traffic mix: 46% direct, 32% search, 15% social, 1% paid.
What this company is made of
Most common skills at Cellarity: Polymerase Chain Reaction (PCR) (29), Molecular Biology (22), Bioinformatics (22), Cell Culture (20), Research Skills (20), Life Sciences (19), Cell Biology (19), Biotechnology (18).
Where the team actually sits
Cellarity people are concentrated in Massachusetts, United States (41), Greater Boston (15), United States (3), New Jersey, United States (2).
Search footprint
Cellarity attracts about 145 organic search visits a month, traffic worth roughly $0K a month if bought through ads. It gained 12 ranking keywords and lost 18 in the last period.
What employees say
- Compensation
- 4.00 / 5
- Career opportunities
- 3.70 / 5
- Senior management
- 3.70 / 5
- Work-life balance
- 4.00 / 5
Frequently asked
Cellarity has 67 employees as of September 2026.
Cellarity has raised $294M in total, most recently a Series C round in October 2022.
Atli Thorarensen (Chief Scientific Officer) sits at the top of Cellarity's reporting structure, with 8 direct reports.
The most common previous employers of current Cellarity staff are Sanofi (5 people), Pfizer (4 people), Bristol Myers Squibb (4 people).
Former Cellarity employees most often move to Flagship Pioneering (8), Sanofi (5), Novo Nordisk (4).
At least 7 companies have a founder who previously worked at Cellarity, including Pharming, Lamin, Collage Bio.
Cellarity attracts about 145 organic search visits a month, worth roughly $0K a month in equivalent ad spend.
The most common skills among Cellarity staff are Polymerase Chain Reaction (PCR), Molecular Biology, Bioinformatics, Cell Culture, Research Skills.
Cellarity staff are concentrated in Massachusetts, United States (41), Greater Boston (15), United States (3).
Cellarity has about 30 people in Research, down 23% over the past year, as of September 2026.
Cellarity has about 6 people in Business Development, up 0% over the past year, as of September 2026.
Computed from 65 current and 211 former Cellarity profiles, as of September 2026. Source: Crustdata.
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