GHG Verification
Stakeholder Letter

Created by: Sustainable Business Consulting, LLC
July 2022

Zscaler, Inc.
Attn: Victor Wong
120 Holger Way
San Jose, CA 95134
Sustainable Business Consulting
3409 California Ave SW, Suite C
Seattle, WA 98116
July 1, 2022
Dear Victor,
Sustainable Business Consulting (SBC) is pleased to provide an independent and impartial
verification of Zscaler’s 2021 Greenhouse Gas (GHG) inventory. SCB has provided 15 years ofsustainability consulting services and is a Certified B-Corporation and a CDP Accredited Provider.
SBC used ISO 14064-part 3, 2nd Edition, 2019-04, to conduct a limited assurance verification. Thisletter is to clarify matters set out in the assurance report. It is not an assurance report and is not a
substitute for the assurance report. This letter and the assurance report, including the opinion(s),are solely for Zscaler’s benefit. SBC consents to the release of this letter to CDP to satisfy the termsof CDP disclosure requirements but without accepting or assuming any liability on SBC’s part toCDP or to any other party who has access to this letter or assurance report.
This verified emissions report encompassed all Zscaler’s operations for the 2021 calendar year,January through December 2021 for Scope 1 & 2. Zscaler reports GHG emissions using an operational
control approach encompassing global operations including offices, data centers, and use of products.
The company assesses emissions in all three scopes: Scope 1, direct emissions, Scope 2 and 3, indirectemissions. Included emissions are as follows:• Scope 1 Emissions: Direct emissions associated with natural gas used to heat offices.
• Scope 2 Emissions: Indirect emissions associated with purchased electricity in offices andco-located data centers.
• Scope 3 Emissions: Purchased Goods and Services; Business Travel; Use of Product; andPublic Cloud.
Excluded emissions are as follows:• Scope 3: Fuel- and energy-related activities (not included in Scope 2); Upstream
transportation and distribution; Waste generated in operations; Employee commuting;Downstream transportation and distribution; Processing of sold products; and End-of-life
treatment of sold products.
The verification confirms the accuracy and completeness of the information provided to substantiate
Zscaler’s 2021 GHG emissions reporting for all three scopes. Verified emissions by scope are asfollows:• Scope 1: 362 MT CO2e
• Scope 2: 25,096 MT CO2e (location-based)• Scope 2: 0 MT CO2e (market-based, after applying purchased EAC/RECs)• Scope 3: 4,564 MT CO2e2oooo

Purchased Goods and Services: 473.9 MT CO2eBusiness Travel: 999.34 MT CO2e
Use of Product: 2,713.59 MT CO2e
Public Cloud: 377.6 MT CO2e

SBC has found no evidence that Zscaler’s 2021 GHG emissions reports or data were incorrect, as
everything was found to be presented fairly and in accordance with stated criteria in line with the
GHG Protocol Corporate Accounting and Reporting Standard and the ISO 14064 Standard.
The verification statement is signed by a Lead Verifier and a Peer Reviewer. The Verifier andReviewer have a combined 19 years of experience in Sustainability Consulting. The methodology
documentation, data sources, and emissions calculations were very well documented and organized,
which made the verification process simple and straightforward.

Xury Deputy, Lead Verifier(BS Environmental Engineering)

Courtney Blann, Peer Reviewer(MBA Strategy and Sustainability,MPS Data Analytics)

July 1, 2022____________Date

July 1, 2022____________
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