Gravity Speakers, LLC (“Company”,“We”, or Us”), respects your privacy and is committed to protecting it through compliance with this policy.
This policy describes the types of information we may collect from you or that you may provide when you visit the website www.gravityspeakers.com (“Website”) and our practices for collecting, using, maintaining, protecting, and disclosing that information. Company is the data controller for information processed through the Website.
Please read this policy carefully to understand our policies and practices regarding your information and how we will treat it. If you do not agree with our policies and practices, your choice is not to use our Website. By accessing or using this Website, you agree to this privacy policy. This policy may change from time to time (see Changes to Our Privacy Policy). Your continued use of this Website after we make changes is deemed to be acceptance of those changes, so please check the policy periodically for updates.
Our Website is not intended for nor targeted towards children as defined by applicable law. We do not knowingly collect personal information from children. If you are younger than the age of consent in your jurisdiction, do not use or provide any information on this Website or on or through any of its features or provide any information about yourself to us, including your name, address, telephone number, email address, or any screen name or user name you may use. If you believe we might have any information from or about a child under the applicable age of consent, please contact us at Privacy@gravityspeakers.com and we will delete it.
For more information, see International Data Transfers
When you use the Website and provide information to Company through the Website, your information may be transferred to a destination outside your jurisdiction, including to the United States. The United States has not received a finding of “adequacy” from the European Union under Article 45 of the GDPR. Company has executed agreements between its affiliates and subsidiaries in accordance with Article 46 of the GDPR. Company also relies on derogations for specific situations set forth in Article 49 of the GDPR in order to transfer personal information across international borders outside of Company, its affiliates, and subsidiaries. In particular, Company transfers personal information across international borders only: with your consent; to perform a contract with you; or to fulfill a compelling legitimate interest of Company in a manner that does not outweigh your rights and freedoms.
Choices About How We Use and Disclose Your Information.
We may disclose aggregated anonymized information about our users without restriction.
When you use the Website and provide information to Company through the Website, your information may be transferred to a destination outside your jurisdiction, including to the United States. The United States has not received a finding of “adequacy” from the European Union under Article 45 of the GDPR. Company has executed agreements between its affiliates and subsidiaries in accordance with Article 46 of the GDPR. Company also relies on derogations for specific situations set forth in Article 49 of the GDPR in order to transfer personal information across international borders outside of Company, its affiliates, and subsidiaries. In particular, Company transfers personal information across international borders only: with your consent; to perform a contract with you; or to fulfill a compelling legitimate interest of Company in a manner that does not outweigh your rights and freedoms.
We do not control third parties’ collection or use of your information to serve interest-based advertising. However, these third parties may provide you with ways to choose not to have your information collected or used in this way. You can opt out of receiving targeted ads from members of the Network Advertising Initiative (“NAI”) on the NAI’s website: https://www.networkadvertising.org/.
To the extent required by law, Company provides you with (i) reasonable access to the personal information collected through the Website, and (ii) the ability to review, correct, export, and delete such personal information. Please contact us using any of the methods identified in the “Contact Information” section if you would like to exercise your individual rights and for information on any fee required to obtain copies of your personal information. We may need to obtain or confirm certain personal information in order to accommodate your request. We will not accommodate a request to change information if we believe the change would violate any law or legal requirement or cause the information to be incorrect.
California Civil Code Section § 1798.83 permits users of our Website that are California residents to request certain information regarding our disclosure of personal information to third parties for their direct marketing purposes. To make such a request, please send an email to Privacy@gravityspeakers.com or write us at: 570 El Camino Real, #150-250, Redwood City, CA 94063, Attn: General Counsel.
We use commercially reasonable measures to secure information collected through the Website. Unfortunately, the transmission of information via the internet is not completely secure. Although we do our best to protect your personal information, we cannot guarantee the security of your personal information transmitted to our Website. Any transmission of personal information is at your own risk. We are not responsible for circumvention of any privacy settings or security measures contained on the Website.
We retain your information for as long as needed: (i) to conduct business with you; (ii) as needed for the purposes outlined in this Privacy Policy; (iii) as necessary to comply with our legal obligations, resolve disputes, and enforce any agreements.
It is our policy to post any changes we make to our privacy policy on this page with a notice that the privacy policy has been updated on the Website home page. If we make material changes to how we treat our users’ personal information, we will notify you by email to the email address provided by you or through a notice on the Website home page. The date the privacy policy was last revised is identified at the top of the page. You are responsible for ensuring we have an up-to-date active and deliverable email address for you, and for periodically visiting our Website and this privacy policy to check for any changes.
To ask questions or comment about this privacy policy and our privacy practices, contact us at:
570 El Camino Real, #150-250, Redwood City, CA 94063, Attn: General Counsel
Email: Privacy@gravityspeakers.com
European Union: Company’s Data Protection Officer is Nausheen Razzak, and can be contacted using the information above. You can request copies of Company’s GDPR Article 46 agreements from the Data Protection Officer. Please contact the Data Protection Officer if you believe Company has processed your information in a manner inconsistent with your privacy rights. You also have the right to contact a supervisory authority if you believe Company has processed your information in a manner inconsistent with your privacy rights.

Sherhara Burrell is a keynote speaker, advisor, and presence authority who transforms the way leaders show up. With over 17 years of experience guiding executives and emerging voices, she equips audiences to move beyond confidence as performance, own high-stakes rooms, and shape conversations that drive real results. Sherhara’s work blends strategic insight with soulful clarity, creating leadership shifts that last long after the keynote ends. Her clients include Google, Under Armour, and Capital One, and she has helped leaders influence culture, spark change, and lead with authenticity that matters.

Diane Flynn, an entrepreneur, author, and coach, stands out as a speaker for her deeply personal and transformative approach to empowering leaders. She shares invaluable insights cultivated through her journeys at Stanford, HBS, and as a successful business executive and entrepreneur. With an unwavering passion for nurturing strong leadership skills, particularly among women, Diane's compelling narrative resonates on many levels. Her two acclaimed books and best-selling Udemy course on Growth Mindset, which boasts over 60,000 students, underscore her ability to connect with diverse audiences and effect positive change.

Ryan Leak is a dynamic speaker, best-selling author, and leadership advisor who inspires over 50,000 people monthly through his keynotes, books, and online platforms. As CEO of a Dallas-based leadership firm, he and his team train 30,000 leaders annually across Fortune 500 companies and pro sports teams. Author of Chasing Failure, Leveling Up, and How to Work with Complicated People, Ryan is known for turning setbacks into opportunities with humor and insight. Featured on Good Morning America and The Today Show, he’s also a proud husband, dad, and assistant basketball coach.

Chris is a master of transformation. His unique energetic approach challenges businesses to embed a dynamic creative culture within their company ethos. Brands such as Nike, Coca-Cola, Diageo, Unilever, Sony, and WPP come back time and again as his results produce tangible returns on investment.

Jessica Chen is a global communication expert and sought-after speaker who has taught over 2 million people how to enhance their workplace communication skills. An Emmy-Award Winner and bestselling author of “Smart, Not Loud,” she empowers individuals from “Quiet Culture” backgrounds to stand out without being aggressive. As the Founder & CEO of Soulcast Media, she collaborates with top organizations, including Google and Microsoft, to elevate communication standards and foster diverse voices in the workplace.
Request Fee & AvailabilityDomestic In-Person (USA):
$15,000 - $25,000*
International In-Person:
$25,000 - $30,000*
Virtual:
Please inquire
Other:
* Ranges are presented as a guideline only. Speaker fees vary by engagement type and are subject to change without notice. For an exact quote, please contact Gravity Speakers.
Philadelphia, Pennsylvania, USA
Marcus Allen is a visionary leader, former professional basketball player, and CEO of Big Brothers Big Sisters Independence (BBBSI), the largest one-to-one mentoring organization in Pennsylvania. Appointed as the first African American CEO in BBBSI’s 100-year history, Marcus has spearheaded initiatives that transform the lives of countless young people through mentorship, innovation, and collaboration. His leadership extends beyond the nonprofit sector, making him a trusted keynote speaker for Fortune 500 companies on topics like sales motivation, DE&I, overcoming adversity, and leadership.
Before joining BBBSI, Marcus served as CEO of ACHIEVEability, where he helped break the generational cycle of poverty for low-income families. His personal journey, growing up in poverty and finding inspiration through mentorship, fuels his passion for empowering others to achieve their full potential. Marcus’ charisma and authenticity make him a sought-after speaker who inspires audiences with his stories of resilience and transformation.
Under Marcus’ leadership, BBBSI has partnered with organizations like the Philadelphia Eagles and Lincoln Financial Field to expand mentoring programs. A passionate advocate for social justice, Marcus has appeared on CNN and Oprah Winfrey, addressing issues such as dismantling the school-to-prison pipeline. His efforts earned him prestigious appointments, including a role with the U.S. Commission on Civil Rights in Pennsylvania and as a Senior Fellow at the University of Pennsylvania’s Fels Institute of Government.
Marcus’ expertise is widely recognized. He has delivered keynote speeches for high-profile organizations like Bank of America, Deloitte, and Independence Blue Cross, captivating audiences with his insights on team building, leadership, and employee engagement. His signature presentations, like “The Five I’s of Leadership” and “Do It Again, I Dare You,” provide practical tools for achieving sustained success in any industry.
In addition to his professional accolades, Marcus holds an MBA in Technology Management and is a two-time inductee into the Paine College Sports Hall of Fame. His numerous honors include Philadelphia Business Journal’s Most Admired CEO Award and the McDonald’s Anthony De Luz Black History Maker of Today Award.
“I want to personally thank you for your message. Inspired by your vulnerability, heart, passion, vision, advocacy, and truth for our kids. I was moved and inspired by everything you shared. I look forward to sharing your recording with my organization.”
“Marcus Allen joined us as the keynote speaker for our Martin Luther King, Jr. Day celebration today. He issued a motivating reminder to our team. ”There are thousands of people counting on you, and they are impacted by the way you serve them and this community.” Thank you, Marcus, for your inspiring words and for underscoring the importance of community service to achieve Dr. King’s dream and keep his legacy alive.”