Exhibit 99.1

August 8, 2018

Dear Fellow Shareholders:

We delivered record revenues, adjusted EBITDA and margins in Q2. Highlights include:

The robust revenue growth we are delivering is demonstrating the inherent operating leverage and room for margin expansion in our financial model. Gross profit percentages expanded to a record 77%. We think we can continue to push gross profit percentage upward. The most dramatic improvement to our margins is on the adjusted EBITDA line, where the margin expanded to 29% from 20%. This is because we are essentially a fixed cost expense model with very little incremental cost of sales when we sell more. This is demonstrated by the 80% year over year and 92% sequential incremental adjusted EBITDA margin in the quarter. Historically, we have targeted annual incremental adjusted EBITDA margins of between 50% and 60% but as our revenue numbers scale we think we will continue to see upside. As we scale revenue, we believe that we can achieve better than 40% adjusted EBITDA margins.

Revenue growth continues to be driven by our leadership position in purchase intent data and our customers’ transition to becoming data driven sales and marketing organizations. IT Deal Alert^TM revenue grew to $14 million in the quarter versus $11.7 million in the same quarter last year, up 21%. The number of IT Deal Alert customers was over 600 in the quarter, up from approximately 500 customers a year ago. We added more than 40 new Priority Engine customers. On May 3, 2018, we released an enhanced version of Priority Engine with multiple improved features to help our customers improve their ability to identify and better target active prospects to help them grow their revenue and market share. These new features are being well-received in the market place. Very importantly, the continued success of Priority Engine is driving our business towards a recurring revenue model, with 34% of revenue in the quarter being derived from longer-term contracts.

As you can imagine, with this evolving subscription model, we are very focused on retention and upselling. Approximately 80% of our revenue comes from large and medium sized customers and about 20% comes from smaller companies, typically VC-backed start-ups. Our revenue renewal rate on longer-term contracts from large and medium sized customers is well over 100%. Those customers are finding great value in our purchase intent data and are renewing and buying more from us at high rates. Historically, we have had higher churn with our smaller customers for a host of reasons that you would expect such as changing go-to-market priorities, budget or funding reductions, personnel turnover, etc. This historical churn with our smaller customers on our Core offerings has carried over to our IT Deal Alert longer-term contracts. While we are not surprised with this issue because of the inherent challenges of working with smaller companies, we think we can reduce the churn with this customer set. We are taking three steps to address this issue. First, we are laser-focused on introducing ease-of-use features as many of our smaller customers do not have the same resources or sophistication of our larger customers. Second, we are investing in our Customer Success team, who are responsible for on-boarding, training and monitoring to ensure that our customers get off to a good start and are

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maximizing their ROI throughout the year. Third, we are creating a dedicated sales team who will be responsible for renewing and upselling, which create more focus on retention while having the side benefit of creating more time for our existing sales team to hunt for new opportunities.

Another benefit that we are seeing from our leadership position in purchase intent data is how it is driving growth in our Core offerings. We use our purchase intent data to power our Core offerings, which is a significant competitive advantage and supports our premium pricing model. Core revenues were up 20% in North America and 16% globally. Growth in Core was especially strong from our ten major global customers as they invest in their brand and content syndication as the IT spending environment improves. Interestingly, we even saw some revenue from this customer segment shift budget from Qualified Sales Opportunities to Core demand generation products. Since both of these offerings have the same margin structure, we are agnostic to where our customers choose to invest with us.

On another note, we are pleased to announce that we made a small, non-material acquisition on August 1, 2018. We acquired Oceanos Marketing, which is a Massachusetts-based contact data management company. The Oceanos team, who will be joining TechTarget, bring data quality and data management expertise that will help us improve our offerings and deliver better results to our customers.

Q2 2018 Results (Unaudited)

Gross Profit Percentages

Gross profit percentage for Q2 2018 was 77%, compared to 73% for Q2 2017. The improvement is primarily due to higher revenue.

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Balance Sheet

Our balance sheet remains very strong. As of June 30, 2018, we had $34.3 million in cash and investments and $27.3 million of outstanding term loan debt. We paid down $2.5 million of debt during the quarter.

Common Stock Repurchase Plan

In the quarter, we did not repurchase any shares of our common stock. There is approximately $2.4 million available under the $20.0 million repurchase program that we announced in June of 2016.  

Traffic Update

Unpaid traffic represented 96% of overall traffic in the quarter. Unpaid traffic was down single digits as compared to Q2 2017, and remains at a level that is more than sufficient to support our revenue.

Q3 2018 Guidance and Increased 2018 Full Year Forecast

For Q3 2018, we expect revenues between $30 million and $31 million. We expect adjusted EBITDA between $7.2 million and $8.0 million.

For the full year, we are reaffirming our 2018 revenue forecast that we raised on May 9, 2018, for revenues to be between $122 million and $124 million.

Today, we are raising our annual adjusted EBITDA forecast to be between $30 million and $32 million.

The original adjusted EBITDA forecast provided on February 7, 2018 was for annual adjusted EBITDA to be between $28 million and $30 million. On May 9, 2018, the annual adjusted EBITDA forecast was raised to be between $29 million and $31 million.

Summary

Overall, our customers continue to be focused on using data to make their sales and marketing organizations more efficient and competitive. Customers that are executing well with our data are seeing outsized results. We are very optimistic about both our short-term and long-term opportunities, especially as the IT spending environment continues to improve, which will continue to result in healthy revenue growth and even higher profitability as our margins continue to expand.

Sincerely,

(C) 2018 TechTarget, Inc. All rights reserved. TechTarget and the TechTarget logo are registered trademarks, and IT Deal Alert, Priority Engine and Qualified Sales Opportunities are trademarks of TechTarget. All other trademarks are the property of their respective owners.

Conference Call and Webcast

TechTarget will discuss these financial results in a conference call at 5:00 p.m. (Eastern Time) today (August 8, 2018). Supplemental financial information and this Letter to Shareholders will be posted to the Investor Relations section of our website.

NOTE: Our Letter to Shareholders will not be read on the conference call. The conference call will include only brief remarks followed by questions and answers.

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The public is invited to listen to a live webcast of TechTarget’s conference call, which can be accessed on the Investor Relations section of our website at http://investor.techtarget.com. The conference call can also be heard via telephone by dialing 1-888-339-0724 (US callers), 1-412-902-4191 (International callers), or 1-855-669-9657 (Canadian callers).

For those investors unable to participate in the live conference call, a replay of the conference call will be available via telephone beginning August 8, 2018 one (1) hour after the conference call through September 8, 2018 at 9:00 a.m. ET. To listen to the replay, US callers should dial 1-877-344-7529 and use the conference number 10121603. International callers should dial 1-412-317-0088 and also use the conference number 10121603. Canadian callers should dial 1-855-669-9658 and also use the conference number 10121603. The webcast replay will also be available on http://investor.techtarget.com during the same period.

Non-GAAP Financial Measures

This letter and the accompanying tables include a discussion of adjusted EBITDA, adjusted net income and adjusted net income per diluted share, all of which are non-GAAP financial measures which are provided as a complement to results provided in accordance with accounting principles generally accepted in the United States of America (“GAAP”).

“Adjusted EBITDA” means earnings before net interest, income taxes, depreciation and amortization, as further adjusted to exclude stock-based compensation, other income and expense, and other one-time charges, if any.

“Adjusted net income” means net income adjusted for amortization, stock-based compensation, foreign exchange, interest on the term loan and one-time charges, if any, as further adjusted for the related income tax impact of the adjustments.

“Adjusted net income per diluted share” means adjusted net income divided by adjusted weighted average diluted shares outstanding.

These non-GAAP measures should be considered in addition to results prepared in accordance with GAAP, but should not be considered a substitute for, or superior to, GAAP results. In addition, our definition of adjusted EBITDA, adjusted net income and adjusted net income per share may not be comparable to the definitions as reported by other companies. We believe that adjusted EBITDA, adjusted net income and adjusted net income per share provide relevant and useful information to enable us and investors to compare our operating performance using an additional measurement. We use these measures in our internal management reporting and planning process as primary measures to evaluate the operating performance of our business, as well as potential acquisitions.

The components of adjusted EBITDA include the key revenue and expense items for which our operating managers are responsible and upon which we evaluate their performance. In the case of senior management, adjusted EBITDA is used as one of the principal financial metrics in their annual incentive compensation program. Adjusted EBITDA is also used for planning purposes and in presentations to our Board of Directors. Adjusted net income is useful to us and investors because it presents an additional measurement of our financial performance, taking into account depreciation, which we believe is an ongoing cost of doing business, but excluding the impact of certain non-cash expenses and items not directly tied to the core operations of our business, including interest on the term loan. Furthermore, we intend to provide these non-GAAP financial measures as part of our future earnings discussions and, therefore, the inclusion of these non-GAAP financial measures will provide consistency in our financial reporting. A reconciliation of these non-GAAP measures to GAAP is provided in the accompanying tables.

Forward Looking Statements

Certain information included in this news release may contain “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. All statements, other than statements of historical

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facts, included or referenced in this release that address activities, events or developments which we expect will or may occur in the future are forward-looking statements, including statements regarding the intent, belief or current expectations of the Company and members of our management team. The words “will,” “believe,” “intend,” “expect,” “anticipate,” “project,” “estimate,” “predict” and similar expressions are also intended to identify forward-looking statements. Such statements may include those regarding guidance on our future financial results and other projections or measures of our future performance; expectations concerning market opportunities and our ability to capitalize on them; and the amount and timing of the benefits expected from acquisitions, new products or services and other potential sources of additional revenue. These statements speak only as of the date of this release and are based on our current plans and expectations. Such forward-looking statements are not guarantees of future performance and involve risks and uncertainties that could cause actual future events or results to be different than those described in or implied by such forward-looking statements. These risks and uncertainties include, but are not limited to, those relating to: market acceptance of our products and services, including continued increased sales of our IT Deal Alert offerings and continued increased international growth; relationships with customers, strategic partners and employees; difficulties in integrating acquired businesses; changes in economic or regulatory conditions or other trends affecting the internet, internet advertising and information technology industries; and other matters included in our SEC filings, including in our Annual Report on Form 10-K. Actual results may differ materially from those contemplated by the forward-looking statements. We undertake no obligation to update our forward-looking statements to reflect future events or circumstances.

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TECHTARGET, INC.

Consolidated Statements of Income

(in 000’s, except per share data)

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TechTarget, Inc.

Consolidated Balance Sheets

(in 000’s, except share and per share data)

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TECHTARGET, INC.

Reconciliation of Net Income to Adjusted EBITDA

(in 000’s)

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TECHTARGET, INC.

Reconciliation of Net Income to Adjusted Net Income and

Net Income per Diluted Share to Adjusted Net Income per Diluted Share

(in 000’s, except per share data)

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TECHTARGET, INC.

Financial Guidance for the Three Months Ended September 30, 2018

(in 000’s)

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