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Nossa Data

Techstars '21

London, GB · Founded 2020 · 10 employees on LinkedIn · 4 known investors

Find your way into Nossa Data

1,116 people in our graph share verified history with the Nossa Data team — schools, employers, funds. One of them is your warm intro.

Javier Solterounlockedknows Irina Dumitrescu · together at Carnegie Mellon University (overlapped)
×2knows the team · via Imperial College London
×7knows the team · via Techstars
knows the team · via Universidad de 'San Andrés'​
knows the team · via Quantic School of Business and Technology

Nossa Data builds software with AI to help companies gather and report environmental, social, and governance (ESG) information. The platform serves companies of all sizes that need to track and report ESG performance to investors, regulators, and employees.

Founders & leadership

Nossa Data was founded in 2020 by Irina Dumitrescu and Julianne Flesher.

IDIrina Dumitrescu
Irina DumitrescuinCo-Founder & CTOIrina Dumitrescu is Co-Founder and CTO of Nossa Data, which provides software to help companies collect and report ESG information across multiple standards and frameworks. She has a background in software engineering and product design.
JFJulianne Flesher
Julianne FlesherinCo-Founder & CEOJulianne Flesher co-founded Nossa Data in 2020, which develops software to help large companies track and report environmental, social, and governance information to regulators, investors, and other stakeholders.

Investors · 4

Also in the syndicate · 1

BGFlead

Funding

SEC filings, press & company announcements

Source: company announcements and press reports — follow each round's link for the claim.

Competitors · 10

by search overlap
Greenly93 shared keywordsGreenly provides an AI-based platform for carbon accounting, greenhouse gas assessment, product life-cycle analysis (LCA), and ESG compliance reporting. It serves companies from SMEs to large enterprises looking to measure, report, and reduce their carbon footprint and meet climate regulations.
Netezza81 shared keywordsIBM is a global technology company whose business spans enterprise software (including Red Hat, HashiCorp, and Confluent), IT infrastructure such as mainframes, servers, and storage, and IT consulting services. The company is also investing heavily in quantum computing and AI-based enterprise offerings, including its Lightwell open-source software security clearinghouse and the Anderon quantum wafer foundry.
Apiday78 shared keywordsApiday provides ESG (Environmental, Social, Governance) reporting and compliance solutions for portfolio companies, helping streamline sustainability reporting obligations and regulatory compliance such as CSRD and ESRS standards.
Sweep73 shared keywordsSweep builds software that helps large companies and financial institutions manage sustainability and non-financial (ESG) data, track carbon across value chains, and comply with climate disclosure regulations. The company serves enterprises and financial institutions globally.
Greenplaces56 shared keywordsGreenplaces provides a platform that simplifies sustainability reporting for vendors, enabling them to meet compliance requirements, build customer trust, and demonstrate their sustainability practices across supply chains.
Persefoni54 shared keywordsPersefoni provides carbon accounting and climate training tools for portfolio company engagement. The platform offers technical support through Persefoni Copilot and educational resources via Persefoni Academy, both included in its Pro subscription for suppliers and portfolio companies.
Breathe ESG44 shared keywordsBreathe ESG provides a software platform that helps organizations manage environmental, social, and governance (ESG) reporting and Net Zero target setting. The platform simplifies ESG compliance and greenhouse gas calculations across key sustainability standards.
Worldfavor44 shared keywordsWorldfavor provides a platform for procurement and sustainability teams to conduct supplier due diligence and manage ESG compliance at scale using AI to identify and prioritize risks across supply chains. The company serves enterprises seeking to embed structured sustainability practices into their operations and regulatory reporting.
Se43 shared keywordsSchneider Electric provides energy management and industrial automation products, software, and advisory services to help industries, businesses, and homes electrify, automate, and digitalize their operations for greater efficiency and sustainability. It serves sectors such as aviation, manufacturing, and healthcare with monitoring software, DCIM, and energy management technologies.
APLANET40 shared keywordsAPLANET provides an ESG data management and analysis platform that helps companies organize, measure, and report on environmental, social, and governance metrics. The software connects organizations' value chains to sustainability goals and enables data-driven decision-making for profitable business transformation.

Companies competing with Nossa Data for the same Google search keywords, organic and paid, via search-intersection analysis.

Companies House · registry record

View on Companies House ↗
Registered name
NOSSA DATA LTD
Company number
12651742
Status
Active
Company type
Private limited company
Incorporated
8 Jun 2020
Registered office
167-169 Great Portland Street, 5th Floor, London, W1W 5PF
Nature of business (SIC)
62090 — Other information technology service activities
Accounts
last made up to 31 Dec 2025 · next due 30 Sept 2027
Confirmation statement
last made up to 2 Jul 2026 · next due 16 Jul 2027

Current officers · 3

  • Irina Iuliana Dumitrescu director, appointed 8 Jun 2020
  • Julianne Sloane Flesher director, appointed 8 Jun 2020
  • Symvan Capital Limited corporate director, appointed 5 Apr 2022

Source: Companies House public register · retrieved 24 Jul 2026. Contains public sector information licensed under the Open Government Licence v3.0.

In the news

Frequently asked questions

What does Nossa Data do?
Nossa Data builds software with AI to help companies gather and report environmental, social, and governance (ESG) information. The platform serves companies of all sizes that need to track and report ESG performance to investors, regulators, and employees.
Who founded Nossa Data?
Nossa Data was founded by Irina Dumitrescu, Julianne Flesher in 2020.
Who are Nossa Data's investors?
Nossa Data's investors include Techstars, SFC Capital, Symvan Capital.
Where is Nossa Data headquartered?
Nossa Data is headquartered in London, GB.