Wilson Sonsini Goodrich & Rosati
Professional Corporation 1700 K Street NW
Fifth Floor
Washington, D.C. 20006-3817 o: 202.973.8800
f: 866.974.7329

Exhibit 5.1

August 9, 2024

Yext, Inc.

61 Ninth Avenue

New York, NY 10011

Re: Registration Statement on Form S-8

Ladies and Gentlemen:

We have examined the Registration Statement on Form S-8 (the “Registration Statement”) to be filed by Yext, Inc., a Delaware corporation (the “Company”), with the Securities and Exchange Commission on or about the date hereof, relating to the registration under the Securities Act of 1933, as amended, of 6,046,964shares of the Company’s Common Stock, par value $0.001 per share (“Common Stock”), consisting of (i) 2,129,125 shares of Common Stock (the “Assumed Shares”) issuable upon vesting of outstanding restricted stock units granted under the Hearsay Social, Inc. 2019 Equity Incentive Plan (the “Hearsay Plan”) as adjusted, converted and assumed by the Company in accordance with the Agreement and Plan of Merger, dated as of June 10, 2024, by and among the Company, Hearsay Social, Inc., a Delaware corporation, Houston Merger Sub, Inc., and Shareholder Representative Services LLC (the “Merger Agreement”) and (ii) 3,917,839 shares of Common Stock (together with the Assumed Shares, the “Shares”) available for future issuance under the Hearsay Plan, which shares represent the number of shares of common stock of Hearsay that were available for issuance under the Hearsay Plan as adjusted and converted pursuant to the terms of the Merger Agreement. As the Company’s legal counsel, we have reviewed the actions proposed to be taken by the Company in connection with the issuance and sale of the Shares to be issued under the Hearsay Plan.

We, as the Company’s counsel in connection with the registration of the Shares, have examined originals or copies, certified or otherwise identified to our satisfaction, of such instruments, documents, certificates, records and other instruments that we have deemed relevant and necessary for the purpose of rendering the opinions hereinafter expressed. In such examination, we have assumed: (a) the authenticity of all documents submitted to us as originals and the genuineness of all signatures; (b) the conformity to the originals of all documents submitted to us as copies and the authenticity of the originals of such documents; (c) the legal competence of all natural signatories to such documents; and (d) the truth, accuracy and completeness of the information, representations and warranties contained in the instruments, documents, certificates and records we have reviewed. As to any facts material to the opinions expressed herein that were not independently established or verified, we have relied upon oral or written statements and representations of officers and other representatives of the Company.

We express no opinion as to the laws of any state or jurisdiction, other than the General Corporation law of the State of Delaware and the federal laws of the United States of America.

We express no opinion as to (i) the effect of any bankruptcy, insolvency, reorganization, arrangement, fraudulent conveyance, moratorium or other similar laws relating to or affecting the rights of creditors generally, (ii) rights to indemnification and contribution which may be limited by applicable law or equitable principles, or (iii) the effect of general principles of equity, including, without limitation, concepts of materiality, reasonableness, good faith and fair dealing, the effect of judicial discretion and the possible unavailability of specific performance, injunctive relief or other equitable relief, and the limitations on rights of acceleration, whether considered in a proceeding in equity or at law.

On the basis of the foregoing, and in reliance thereon, we are of the opinion that the Shares, when issued and sold in the manner referred to in the Hearsay Plan and pursuant to the agreements that accompany the Hearsay Plan, will be validly issued, fully paid, and nonassessable.

AUSTIN BEIJING BOSTON BOULDER BRUSSELS HONG KONG LONDON LOS ANGELES NEW YORK PALO ALTO
SALT LAKE CITY SAN DIEGO SAN FRANCISCO SEATTLE SHANGHAI WASHINGTON, DC WILMINGTON, DE

Yext, Inc.

August 9, 2024

Page 2

We consent to the use of this opinion as an exhibit to the Registration Statement and further consent to the use of our name wherever appearing in the Registration Statement and any amendments thereto.

Sincerely,

/s/ Wilson Sonsini Goodrich & Rosati, P.C.

WILSON SONSINI GOODRICH & ROSATI

Professional Corporation