Adelphi

Adelphi

Climate, environment, and development policy consultancy

Overview

Adelphi is an independent consultancy that focuses on climate, environment and development issues. It combines scientific analysis, evidence-based advisory services and international cooperation to guide policy makers and decision-makers. The firm works locally and globally through transdisciplinary research and stakeholder dialogues to shape policy agendas, inform policy processes and facilitate political communication. Its goal is to support a just, transformative transition toward a sustainable, future-proof society by helping leaders address political, economic and social change.

About Adelphi

Simplify's Rating
Why Adelphi is rated
C+
Rated C on Competitive Edge
Rated B on Growth Potential
Rated C on Differentiation

Industries

Data & Analytics

Government & Public Sector

Cybersecurity

Defense

Company Size

11-50

Company Stage

N/A

Total Funding

N/A

Headquarters

New York City, New York

Founded

2001

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Simplify's Take

What believers are saying

  • January 2026 Karmelle acquisition broadens cross-sell into higher-margin packaging machinery deals.
  • Adelphi.com posted current job vacancies and graduate recruitment in 2026, signaling active hiring.
  • External recognition in 2025 strengthens recruiting, pricing power, and client trust this year.

What critics are saying

  • January 2026 restructuring signals integration risk across multiple businesses and cultures.
  • Adelphi Group's niche consulting footprint leaves revenue exposed to pharma client budget shifts.
  • Competitors like specialist consultancies and machinery OEMs can outspend Adelphi on sales and hiring.

What makes Adelphi unique

  • Adelphi Group won Lifesciences Review Europe's Top Pharmaceutical Consultancy in Europe 2025.
  • January 2026 restructuring sharpened Adelphi's profiles across consulting and adjacent businesses.
  • January 2026 Karmelle acquisition deepened Adelphi's British liquid-packaging engineering capabilities.

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Benefits

Health Insurance

401(k) Retirement Plan

401(k) Company Match

Unlimited Paid Time Off

Remote Work Options

Growth & Insights

Headcount

6 month growth

-12%

1 year growth

-12%

2 year growth

-12%

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