Company: MYSEW
Filing Date: 2025-06-16
Form Type: DEFA14A
Source: 0001213900-25-054791
Chunk: 0

Company: Myseum, Inc.
Filing Date: 2025-06-16
Form: DEFA14A
Chunk 0
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<div align='center'>UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Schedule 14A

Proxy Statement Pursuant to Section 14(a) of the
Securities Exchange Act of 1934

(Amendment No. )</div>

| Filed by the Registrant ☒                                                |                                                                                                      |
| Filed by a Party other than the Registrant ☐                             |                                                                                                      |
| Check the appropriate box:                                               |                                                                                                      |
| ☐                                                                        | Preliminary Proxy Statement                                                                          |
| ☐                                                                        | Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))                      |
| ☐                                                                        | Definitive Proxy Statement                                                                           |
| ☒                                                                        | Definitive Additional Materials                                                                      |
| ☐                                                                        | Soliciting Material under §240.14a-12                                                                |
| DATCHAT, INC.                                                            |                                                                                                      |
| (Name of Registrant as Specified In Its Charter)                         |                                                                                                      |
| (Name of Person(s) Filing Proxy Statement, if other than the Registrant) |                                                                                                      |
| Payment of Filing Fee (Check all boxes that apply):                      |                                                                                                      |
| ☒                                                                        | No fee required.                                                                                     |
| ☐                                                                        | Fee paid previously with preliminary materials.                                                      |
| ☐                                                                        | Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11. |

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# V76065 - P35417 DATCHAT, INC. 65 CHURCH STREET, SUITE 230 NEW BRUNSWICK, NJ 08901 DATCHAT, INC. 2025 Annual Meeting Vote by August 5, 2025 11:59 PM ET You invested in DATCHAT, INC. and it’s time to vote! You have the right to vote on proposals being presented at the Annual Meeting. This is an important notice regarding the availability of proxy materials for the shareholder meeting to be held on August 6, 2025. Get informed before you vote View the Notice and Proxy Statement and Form 10 - K online OR you can receive a free paper or email copy of the material(s) by requesting prior to July 23,