Exhibit 99.1

Silver Spring Networks Reports First Quarter 2015 Financial Results

18% Year-over-Year Growth in Non-GAAP Gross Profit

60% Top-Line Growth in New Solutions

Record Managed Services and SaaS Top-Line

Five New International Signings

Redwood City, CA – May 7, 2015 – Silver Spring Networks, Inc. (NYSE: SSNI) today announced financial results for its first quarter ended March 31, 2015.

First Quarter Results (all comparisons made are against the prior year period, unless otherwise stated)

“We are pleased with our strong Q1 results, demonstrating solid execution of our business model.” said Scott Lang, Chairman, President, and Chief Executive Officer. “Our proven benefits with leading customers have led to five high-profile international wins. Our advanced networking platform positions us to extend our market leadership in the Smart Grid and Smart Cities to the broader Internet-of-Things opportunity.”

Business Highlights (through May 7, 2015, unless otherwise stated):

Change in accounting estimate for GAAP revenue recognition

The first quarter 2015 GAAP results of $0.69 diluted earnings per share on $144 million of revenue included revenue of $112 million which otherwise would have been deferred before a change in accounting estimate of the impact of customer-specific acceptance criteria described below.

Based on the completion of analyses of historical experience for arrangements that contain customer-specific acceptance criteria, when initial acceptance criteria has been successfully achieved in a customer deployment, or when substantially similar acceptance criteria have been met in similar deployments, Silver Spring, in certain circumstances, will recognize GAAP revenue when goods and services have been delivered and all other revenue recognition criteria are met. In these circumstances, receipt of a customer’s acceptance is no longer considered necessary for GAAP revenue recognition. Silver Spring will continue to defer GAAP revenue until either substantially similar acceptance criteria have been met in similar deployments, or substantially similar acceptance criteria have been met in the initial area within the customer’s deployment.

This continues to be in accordance with Staff Accounting Bulletin No. 104, and was applied on a cumulative catch-up basis for existing customer arrangements, as well as prospectively for new customer arrangements, effective January 1, 2015. This did not impact non-GAAP financial results, other than a modest tax impact due to higher GAAP earnings. Silver Spring intends to continue to report both GAAP on non-GAAP revenue and operating results.

Conference Call

Silver Spring will host a conference call today at 1:30 pm PT (4:30 pm ET) to review its results for the first quarter ended March 31, 2015 and its outlook for the future. During

the course of this call, Silver Spring may also disclose material developments affecting its business and/or financial performance. Listeners may access the conference call live at 877-407-0832 (U.S.) or 201-689-8433 (International) or via webcast at http://ir.silverspringnet.com. A dial-in replay of the conference call will be available until May 25, 2015 and can be accessed at 877-660-6853 (domestic) or 201-612-7415 (international) passcode 13607731. An audio webcast replay of the conference call will be available for one year at http://ir.silverspringnet.com.

About Silver Spring Networks

Silver Spring Networks is a leading networking platform and solutions provider for smart energy networks. Silver Spring’s pioneering IPv6 networking platform, with over 20.5 million Silver Spring enabled devices delivered, is connecting utilities to homes and business throughout the world with the goal of achieving greater energy efficiency for the planet. Silver Spring’s innovative solutions enable utilities to gain operational efficiencies, improve grid reliability, and empower consumers to monitor and manage energy consumption. Silver Spring Networks’ customers include major utilities around the globe such as Baltimore Gas & Electric, CitiPower & Powercor, Commonwealth Edison, CPS Energy, Florida Power & Light, Jemena Electricity Networks Limited, Pacific Gas & Electric, Pepco Holdings, Progress Energy, and Singapore Power, among others. To learn more, please visit www.silverspringnet.com.

Non-GAAP and Other Financial Measures

Silver Spring believes that its results of operations under generally accepted accounting principles, or GAAP, when considered in isolation, may only provide limited insight into the performance of its business in any given period. As a result, Silver Spring manages its business, makes planning decisions, evaluates its performance and allocates resources by assessing non-GAAP measures such as non-GAAP revenue, recurring non-GAAP revenue, recurring non-GAAP revenue per endpoint, cost of non-GAAP revenue, non-GAAP gross profit (loss), non-GAAP gross margin, non-GAAP operating income (loss), non-GAAP net income (loss), non-GAAP income (loss) per share, adjusted EBITDA, and total backlog, in addition to other financial measures presented in accordance with GAAP. Silver Spring believes that these non-GAAP and other financial measures offer valuable supplemental information regarding the performance of its business, and will help investors better understand the sales volumes, and gross margin and profitability trends, as well as the cash flow characteristics, of its business. The non-GAAP measures should not be considered in isolation from, are not a substitute for, and do not purport to be an alternative to, revenue, cost of revenue, gross profit (loss), gross margin, operating income (loss), net income (loss), income (loss) per share or any other performance measure derived in accordance with GAAP. Silver Spring may consider whether other significant non-recurring items that arise in the future should also be excluded in calculating the non-GAAP financial measures it uses.

Non-GAAP revenue represents amounts invoiced for products for which ownership, typically evidenced by title and risk of loss, has transferred or services that have been

provided to the customer, and for which payment is expected to be made in accordance with normal payment terms. Non-GAAP revenue excludes amounts for undelivered products, services to be performed in the future, and amounts paid or payable to customers. Non-GAAP revenue is initially recorded as deferred revenue and is then recognized as revenue when all revenue recognition criteria has been met under Silver Spring’s accounting policies as described in Silver Spring’s filings with the Securities and Exchange Commission. Silver Spring reconciles revenue to non-GAAP revenue by adding revenue to the change in deferred revenue in a given period.

Recurring non-GAAP revenue is non-GAAP revenue from managed services and SaaS, as well as customer support and other service offerings. Recurring non-GAAP revenue is primarily recurring in nature and includes managed services, hosting and software maintenance, and support fees, as well as one-time managed services and SaaS set up fees. Customer support and other services are provided to customers outside of managed services and SaaS offerings, and are also recurring in nature. Silver Spring reconciles recurring GAAP revenue to recurring non-GAAP revenue by adding revenue to the change in deferred revenue in a given period.

Recurring non-GAAP revenue per endpoint represents a trailing twelve-month recurring non-GAAP revenue per cumulative endpoint shipped from inception to date.

Cost of non-GAAP revenue represents the cost associated with products and services that have been delivered to the customer, excluding stock-based compensation, amortization of intangibles and acquisition-related charges. Cost of product shipments for which revenue is not recognized in the period incurred is recorded as deferred cost of revenue. Deferred cost of revenue is expensed in the statement of operations as cost of revenue when the corresponding revenue is recognized. Costs related to services are expensed in the period incurred. Silver Spring reconcile cost of revenue to cost of non-GAAP revenue by adding cost of revenue and the change in deferred cost of revenue, less stock-based compensation, amortization of intangibles and acquisition-related charges, included in cost of revenue in a given period.

Non-GAAP gross profit (loss) is the difference between non-GAAP revenue and cost of non-GAAP revenue. Non-GAAP gross margin is non-GAAP gross profit (loss) as a percentage of non-GAAP revenue.

Non-GAAP operating income (loss) represents operating income (loss) adjusted for non-GAAP revenue and cost of non-GAAP revenue and excludes expenses related to the amortization of intangible assets, stock-based compensation, acquisition-related charges, restructuring and legal settlements.

Non-GAAP net income (loss) represents net income (loss) adjusted for changes in deferred revenue and deferred cost of revenue, and excludes expenses related to the amortization of intangible assets, stock-based compensation, acquisition-related charges, income tax benefit related to acquisitions, restructuring and legal settlements.

Non-GAAP income (loss) per share represents non-GAAP net income (loss) divided by weighted average shares outstanding for the period.

Adjusted EBITDA is net income (loss) adjusted for changes in deferred revenue and deferred cost of revenue, other (income) expense, net, (benefit) provision for income taxes, depreciation and amortization, stock-based compensation, acquisition-related charges, restructuring, legal settlements and certain other items management believes affect the comparability of operating results.

Total backlog represents future product and service billings that Silver Spring expects to generate pursuant to contracts entered into with its utility customers and meter manufacturers. Total backlog includes order backlog, which represents future billings for open purchase orders and other firm commitments.

Forward-Looking Statements

This press release contains forward-looking statements that involve risks and uncertainties. These forward-looking statements include statements regarding the momentum in Silver Spring Networks’ business; the performance, capabilities and benefits of recently announced new product introductions; future growth; and future financial results. Statements including words such as “anticipate”, “believe”, “estimate” or “expect” and statements in the future tense are forward-looking statements. These forward-looking statements are preliminary estimates and expectations based on current information and are subject to business and economic risks and uncertainties that could cause actual events or actual future results to differ materially from the expectations set forth in the forward-looking statements. Important factors that could cause results to differ materially from the statements herein include: timing around customer decisions and deployment pace; dependence on a limited number of customers and key suppliers; general economic risks; specific economic risks in different geographies and among different industries; failure to maintain or increase renewals and increase business from existing customers; uncertainties around continued success in sales growth and market share gains; lengthy sales cycles with no assurances that a prospective customer will select Silver Spring’s products and services; amounts included in backlog may not result in billings or revenue; adverse publicity about, or consumer or political opposition to, the smart grid; security breaches involving smart grid products or services; the ability to integrate technology into third-party devices and Silver Spring’s relationship with third-party manufacturers; execution and customer adoption risks related to new product introductions and innovation, including our new fifth generation networking platform and products; the ability to attract and retain personnel, including members of Silver Spring’s management team; changes in strategy; technological changes that make Silver Spring’s products and services less competitive; competition, particularly from larger companies with more resources than Silver Spring; international business uncertainties; the ability to acquire and integrate other businesses; and other risk factors set forth from time to time in Silver Spring’s filings with the SEC, copies of which are available free of charge at the SEC’s website at www.sec.gov. All forward-looking statements in this press release reflect Silver

Spring’s expectations as of May 7, 2015. Silver Spring undertakes no obligation, and expressly disclaims any obligation, to update any forward-looking statements in this press release in light of new information or future events. In addition, the preliminary financial results set forth in this press release are estimates based on information currently available to Silver Spring.

For additional information, please contact:

Mark McKechnie

Investor Relations

650-839-4664

mmckechnie@silverspringnet.com

Noel Hartzell

Global Communications

650-839-4184

nhartzell@silverspringnet.com

SILVER SPRING NETWORKS

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(In thousands, except per share data)

Non-GAAP results (in thousands, except per share data)

The following tables reconcile the Company’s net income (loss) and income (loss) per share as presented in its unaudited Condensed Consolidated Statements of Operations and prepared in accordance with GAAP to its non-GAAP net income (loss) and non-GAAP income (loss) per share.

SILVER SPRING NETWORKS, INC.

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands)

SILVER SPRING NETWORKS

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOW

(In thousands)

SILVER SPRING NETWORKS, INC.

UNAUDITED RECONCILIATION OF NET REVENUE BETWEEN GAAP AND NON-GAAP

(in thousands, except percentages)

SILVER SPRING NETWORKS, INC.

UNAUDITED SUPPLEMENTAL FINANCIAL INFORMATION

(in thousands, except percentages and headcount)

SILVER SPRING NETWORKS

UNAUDITED RECONCILIATION OF GAAP TO NON-GAAP FINANCIAL MEASURES

(In thousands, except per share data and percentages)