Science & Technology (U40) IRS Verified DX Registered 990 on File

MOZILLA FOUNDATION

EIN: 20-0097189 · SAN FRANCISCO, CA 94105-3740 · United States · FY 2023 Data

3 out of 5 55 / 100 Based on 2+ years of filings

Financial strength (30%) 82/100

Reliability (20%) 55/100

Effectiveness (25%) 78/100

Impact (25%) No data yet

Financial data: FY 2023 · Scored 9/13/2026

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CharityAI™ Score

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Mission Statement

The Mozilla Foundation is the organizational home of Mozilla, a global community and public interest initiative that believes the web should be open and accessible to all. To protect the web as a public resource and empower its users, we create open source products, teach 21st-century skills, and spur grassroots advocacy campaigns. We build products that create opportunity and inspire further innovation. We believe in the importance of universal web literacy: creating a world where everyone can read, write and participate online. Our advocacy work addresses issues like net neutrality, privacy and mass surveillance, and often requires effort from all corners of Mozilla.

Financial Overview — FY 2023

$64.7M

Total Revenue

$39.8M

Total Expenses

$118.0M

Net Assets

Employees

Revenue Sources

Expense Breakdown

Program Expense Ratio 65.2%

Fundraising Efficiency N/A

Operating Reserve 35.52x

Liability-to-Asset 5.0%

Revenue Diversification 58.1%

Executive Compensation $3.3M

Compared with Peers

FY 2023

Compared with 125 similar organizations (United States, Science & Technology, $10M–$100M in expenses), FY 2023.

This organization Middle half of peers (P25–P75) Peer median

Ratio	This org	Peer median	Position (P10 → P90)
Program expense ratio Program expenses / total expenses · higher is better	65.2%	82.4%	P10P90	Bottom quarter
Admin expense ratio Management and general / total expenses · lower is better	27.4%	16.3%	P10P90	Bottom quarter
Fundraising expense ratio Fundraising expenses / total expenses · lower is better	7.4%	0.0%	P10P90	Bottom quarter
Operating reserve Months of expenses covered by net assets · higher is better	35.5 mo	16.1 mo	P10P90	Above median
Liabilities to assets Total liabilities / total assets · lower is better	5.0%	22.3%	P10P90	Top quarter
Revenue concentration Share of revenue from the largest source · lower is better	58.1%	86.3%	P10P90	Top quarter
Revenue growth Year over year revenue growth	30.0%	6.9%	P10P90
Expense growth Year over year expense growth	31.5%	10.2%	P10P90
Surplus margin Surplus as a share of revenue	38.4%	0.7%	P10P90

Financial History

Year	Revenue	Expenses	Net Assets	Program %	Staff
2023	$64.7M	$39.8M	$118.0M	65.2%	66
2022	$49.7M	$30.3M	$89.4M	72.4%	60
2021	$30.7M	$23.3M	N/A	—	47

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Organization Details

EIN: 20-0097189
State: CA
City: SAN FRANCISCO
ZIP: 94105-3740
Classification: U40
Category: Science & Technology
Rating: 3★
Coverage: A
Last Updated: Aug 2026
IRS Ruling Year: 2003
Foundation Code: 15
Form 990: On File

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CharityAI™ rates charities from 0 to 100 using public filings (IRS Form 990 and the equivalent registries outside the US) together with the information the charity itself provides on DonationX. Ratings are recalculated every quarter, without human bias, and shown as stars.

Four pillars

Financial strength30%

Program expense ratio, fundraising efficiency, operating reserves, liabilities and revenue diversification, compared with similar organizations.

Reliability20%

Standing with the registry, filing history, verification and how complete the profile is.

Effectiveness25%

How much goes to programs and how consistently the organization delivers them.

Impact25%

The outcomes the charity reports on DonationX: people served, cost per service and results.

Stars

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A pillar with no data counts as zero. Without impact metrics the score is capped at 59 (three stars): only the charity can supply that data.
The coverage grade (A to D) says how much filing data the score rests on; NONE means there is not enough to rate.
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