Sigma Delta Tau Society

What Sigma Delta Tau Society does

Sigma Delta Tau Society is a private non-profit collegiate sorority founded on March 25, 1917, at Cornell University by seven Jewish women. It provides a sisterhood membership experience to undergraduate women at universities across the United States, structured around leadership development, academic achievement, philanthropic service, and lifelong alumnae engagement. The organization operates as a member-governed entity led by an elected National Executive Board of nine volunteer members and a professional staff of approximately eight at the National Headquarters in Carmel, Indiana. Active collegiate chapters number between 28 and 62 across at least 17 states, with the Sorority having initiated more than 75,000 members since founding.

The organization's product portfolio is member-experience rather than technology-based and includes the New Member Experience onboarding suite, signature programs (Elevate virtual leadership development, Safe Smart Dating, InveSDT in Yourself financial literacy, Shining Together inclusive recruitment), the Order of the Lapis academic honor society, Presidents Academy, and a biennial National Convention. Underlying operations rely on a third-party SaaS stack (ChapterSpot for membership rosters, Greekbill for dues billing, Plaid/Lapis Learning for LMS, SmarterSelect for grant applications, GivingFuel for Foundation donations, Wufoo for forms) accessed through the SDT Portal. Trademarks protect the Sorority's name, Greek letters, crest, Torch symbol, and badge.

Revenue derives from four streams: National Membership Dues and Local Chapter Dues (subscription, billed each semester), Foundation Donations (charitable, via the SDT Foundation which surpassed $1 million cumulatively invested in the sisterhood by 2022), and Convention Registration Fees (one-time, tiered by attendee type). The Foundation operates the National Scholarship Program ($54,500 in 2026 tuition assistance to 41 sisters) and One Hope hardship grants, while the wholly-owned SDT Capital Corporation manages chapter housing and property. Philanthropic partnerships include Prevent Child Abuse America (national partner) and Jewish Women International (since 2002, co-developer of Safe Smart Dating with Zeta Beta Tau). A full organizational rebrand was launched in 2024 under the "Shine as One" positioning.

Name

Sigma Delta Tau Society

Legal name

Sigma Delta Tau

Website

https://sigmadeltatau.org

Company type

Private

Founded year

1917

Operating status

Operating

Headcount range

11–50 employees

Short description

Sigma Delta Tau Society is a non-profit collegiate sorority founded in 1917 that provides leadership development, philanthropic programming, and lifelong sisterhood engagement to undergraduate women through 28+ active chapters across the United States, supported by a Foundation, scholarship programs, and wholly-owned Capital Corporation.

Ownership category

akta.pro rank

Product category

Collegiate Sorority Services

NAICS

Business Associations (813910), Business, Professional, Labor, Political, and Similar Organizations (8139), Civic and Social Organizations (813410)

SIC

Services-Membership Organizations (8600)

akta.pro primary industry

Greek Life (Fraternities & Sororities) (EDALAHAD)

akta.pro secondary industries

Student Organizations & Club Administration (EDALAHAB), Volunteer Management & Alumni Leadership Programs (EDALAOAH), Alumni Benefits, Membership & Affinity Programs (EDALAOAM), Alumni Events, Reunions & Regional Chapters (EDALAOAG), Alumni Communications, Marketing & Publications (EDALAOAF)

Keywords

• Collegiate sorority membership
• Women's leadership development
• Fraternal membership programs
• Philanthropic service partnerships
• Alumnae network engagement

Headquarters

HQ city

Carmel

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Others, Technology or R&D

Revenue model

1. National Membership Dues: Members pay national organization dues and fees each semester to support operations, programming and activities provided by the National organization.
2. Local Chapter Dues: Each chapter maintains its own budget and sets local dues and fees, which vary by differences in location, housing, meals, dues and collegiate events and programming.
3. Foundation Donations: The Sigma Delta Tau Foundation receives charitable donations from SDT members and friends to support scholarships, grants, and educational programming through various giving opportunities including one-time donations, monthly giving, and planned giving.
4. Convention Registration Fees: Registration fees for National Convention events, with different rates for chapter delegates, additional collegians, and alumnae attendees.

Pricing tiers

Go-to-market motion1 record

Distribution channels4 records

Marketing channels8 records

Core offering

Sigma Delta Tau is a non-profit collegiate sorority delivering a lifelong sorority membership experience to women in the U.S. Its core offering centers on operating 62+ active collegiate chapters that onboard members through the New Member Experience and engage them in signature programs (Elevate leadership development, Safe Smart Dating, InveSDT in Yourself financial literacy, Shining Together inclusive recruitment) and the Order of the Lapis academic honor society. The sorority is supported by the Sigma Delta Tau Foundation (scholarships, One Hope hardship grants) and the Sigma Delta Tau Capital Corporation (chapter housing and property management).

Product overview

Sigma Delta Tau Society is a collegiate sorority offering a portfolio of member experience programs, organizational management tools, and financial support services. The core offerings include the New Member Experience onboarding program, signature programs (Elevate leadership development, Safe Smart Dating, InveSDT in Yourself financial literacy, Shining Together inclusive recruitment), the SDT Portal member management platform, Order of the Lapis academic honor society, National Convention, Presidents Academy, and the Conference Internship Program. The organization also operates through the SDT Foundation (scholarships, One Hope Grants) and Capital Corporation (chapter housing/property management). Publications include The Torch Magazine. The organization launched a new brand in 2024 featuring the tagline 'Shine as One.'

Differentiator

Problem solved

Functional benefit

Brands

• The Torch Magazine: Official publication of Sigma Delta Tau containing news, stories, and updates about the organization.
• Order of the Lapis
• Elevate
• InveSDT in Yourself: Financial Literacy
• Safe Smart Dating
• Shining Together: Building Inclusive Recruitment Practices

Products and services

• New Member Experience A suite of programs and activities that welcome and socialize new members into initiated membership, including sisterhood experiences, discussion sessions, and teaching lessons that forge connections and deepen understanding of SDT history and heritage. Targeted at newly joining collegiate members.
• Elevate SDT's premier annual virtual leadership development program designed for current and emerging chapter leaders, featuring a keynote series on communication, project management, relationship building, and self-awareness.
• Safe Smart Dating An interactive educational program developed with Jewish Women International and Zeta Beta Tau exploring gender norms, healthy relationships, and active bystander intervention. The first national Greek program to address dating abuse and sexual assault prevention.
• InveSDT in Yourself: Financial Literacy A financial literacy training program facilitated by SDT alumnae that supports collegiate members in making informed decisions about financial health, covering managing income, budgeting, and building credit.
• Shining Together: Building Inclusive Recruitment Practices An interactive program where collegiate members explore personal and social identities, privilege, and bias, and unpack how these concepts show up in recruitment to foster inclusive practices into chapter life.
• Order of the Lapis SDT's academic honor society recognizing juniors and seniors who have demonstrated personal excellence in scholarship, requiring GPA thresholds (3.7+ for juniors, 3.5+ for seniors) and at least one full semester of membership.
• Conference Internship Program A selective program bringing collegiate members together to collaborate with peers, staff, and volunteers in support of the National Convention, gaining hands-on experience in event operations, communication, and leadership.
• SDT Portal Online member database and management platform providing staff, volunteers, collegiate, and alumnae members access to Greekbill (dues billing), Plaid's Lapis Learning LMS, ChapterSpot (roster management), event registration, and documentation submission.
• National Convention
• Presidents Academy Institute-style program providing Chapter Presidents an opportunity to develop a foundation for effective chapter leadership while building connections with other SDT volunteers and the National Organization.
• The Torch Magazine SDT's official magazine publication providing news, stories, and updates about the organization, its members, and sisterhood activities.
• National Scholarship Program Annual educational scholarships assisting undergraduate and alumnae sisters with tuition expenses, including needs-based, merit-based, and chapter-specific awards funded by donor generosity through the SDT Foundation.
• One Hope Grants Hardship assistance grants for collegiate and alumnae women facing difficulty due to unforeseeable circumstances, including natural disaster relief up to $250 per disaster. Exemplifies the motto 'Patriae Multae Spes Una' (One Hope of Many People).
• Capital Corporation Entity supporting SDT's values by investing in properties, members, and volunteers to provide living environments promoting sisterhood, academics, and well-being. Offers lease agreements, vendor support, crisis planning, and professional facility management through Supported and Managed service tiers.

Quantifiable outcome

• Over $1 million invested directly into the sisterhood since 2017 through scholarships, grants, and programming
• +1 more outcomes

Named customers1 record

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration6 records

Partnerships

Four partnerships are on record, tiered core and secondary.

• Jewish Women International (JWI)coreStrategic or Co-development Partner · 1 January 2002Partnership established in 2002 under SDT National President Beth Gruber. Both organizations were founded by Jewish women and share missions to empower women and girls. Together they created Safe Smart Dating in partnership with Zeta Beta Tau, an educational program exploring dating abuse and sexual assault prevention. SDT has raised over $660,000 to support JWI's library initiatives for children of domestic violence. The partnership reaches students on 54 campuses nationwide.
• Prevent Child Abuse AmericacoreStrategic or Co-development PartnerNational philanthropic partner of Sigma Delta Tau. The organization works to prevent child abuse and neglect through education, advocacy, and community programs. SDT chapters engage in service projects supporting this cause.
• Zeta Beta TausecondaryStrategic or Co-development PartnerCo-developed the Safe Smart Dating program alongside SDT and Jewish Women International. This is the first national program for Greek collegiate communities to explore dating abuse and sexual assault prevention.
• Holmes Murphy Fraternal PracticesecondaryOthersInsurance provider for Sigma Delta Tau that supplies health and safety resources for chapters, advisors, and members including event planning guidelines, hazing prevention materials, and risk management strategies.

Scale indicators4 records

Recent moves7 records

Expansion highlights5 records

Others

• National Panhellenic Conference: Umbrella trade association that SDT belongs to (along with 25+ other NPC sororities). Not a peer in the recruiting sense, but the governing body that sets recruitment rules and the competitive framework within which SDT and its direct peers operate.

Direct peers

• Alpha Chi Omega: Large NPC sorority offering similar women's leadership programming, alumnae engagement, and chapter-based service model. Directly competes in formal recruitment at the same campuses as SDT, with substantially larger national scale.
• Delta Delta Delta: One of the largest NPC sororities with extensive collegiate chapter network and alumnae association structure. Competes directly with SDT in primary recruitment at overlapping universities and shares the NPC governance framework.
• Delta Gamma: NPC-affiliated sorority operating collegiate chapters and alumnae associations with similar programming emphasis (sight/ service missions). Direct competitor in primary recruitment on overlapping campuses.
• Alpha Phi International: NPC sorority with parallel collegiate chapter network, alumnae engagement, and signature philanthropic partnership structure. Direct competitor in recruitment on shared campuses with similar scale.
• Pi Beta Phi: Major NPC sorority with parallel structure: national headquarters, collegiate chapters, alumnae clubs, foundation, and signature leadership/ literacy programs. Direct recruitment competitor with significantly larger scale.
• Kappa Alpha Theta: Established NPC sorority with comparable chapter-based membership model, leadership development programs, and alumnae affinity network. Direct competitor on shared campuses for the same college women demographic.
• Gamma Phi Beta: NPC sorority with comparable collegiate/alumnae member structure and chapter-based service programming. Direct competitor at overlapping universities for the same prospective member demographic.
• Kappa Kappa Gamma: NPC sorority with analogous member experience programs, foundation giving model, and chapter-based collegiate/alumnae dual structure. Competes head-to-head on shared university campuses for prospective members.
• Alpha Epsilon Phi: Closest peer: NPC sorority founded in 1909 with a similar Jewish heritage identity, offering comparable leadership development, alumnae engagement, and philanthropic programming. Directly competes for the same niche of Jewish-identifying college women on overlapping campuses.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/SigmaDeltaTauHQ
• LinkedInlinkedin.com/company/sigma-delta-tau
• Instagraminstagram.com/sigmadeltatauhq

Revenue estimate

Valuation estimate

Number of profiles

Profiles10 records

Subsidiaries2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Sigma Delta Tau Society