SISTER TO SISTER INTERNATIONAL INC

What SISTER TO SISTER INTERNATIONAL INC does

Sister to Sister International, Inc. (STSI) is a private nonprofit organization founded in 1994 by Dr. Cheryl Brannan and headquartered in Yonkers, New York. It serves women, girls, and families of African descent — primarily in Westchester and Rockland Counties with international linkages to Ghana — through a four-pillar framework: Health & Wellness, STEAM Education, Entrepreneurship & Prosperity, and Social Justice. Core programs include the annual STEAM Camp (16 years of consecutive programming, serving ~20 middle and high school girls per year), the year-round STEAM Academy (17 cohorts to date), the Reach for the Stars Scholarship, and the Westchester Black Maternal and Child Center of Excellence (WBMCCE), which addresses Black maternal health disparities.

STSI's service delivery relies on a community-led, grassroots model rather than proprietary technology. Programs are delivered at partner venues including Yonkers Riverfront Library, Manhattanville College, PepsiCo's Valhalla R&D campus, Cold Spring Harbor Laboratory's DNA Learning Center, and Regeneron's Sleepy Hollow facility, with virtual delivery via Zoom and the Double Good fundraising platform. Operational technology is limited to a Wix-hosted website, a Black Business Directory platform, email marketing to 3,000+ subscribers, and standard social media channels (YouTube, Instagram, Facebook, X/Twitter).

Revenue is generated through a diversified mix of membership dues ($35-$300/year across tiers), event ticket sales ($15-$55), foundation and corporate grants (Con Edison Foundation $50K in 2025, United Way $20K in 2024), corporate partnerships, and individual donations. Funding grew materially in 2025 (over $60K raised) anchored by a major Con Edison Foundation gift. With 1-10 employees, STSI operates as a lean, volunteer-and-board-supported organization whose strategic significance derives from its collective impact network of 25+ stakeholders and its 30-year brand presence in Westchester County, rather than from financial scale.

Name

SISTER TO SISTER INTERNATIONAL INC

Legal name

Sister to Sister International, Inc.

Website

https://s2si.org

Company type

Private

Founded year

1994

Operating status

Operating

Headcount range

1–10 employees

Short description

Sister to Sister International Inc. is a Yonkers, NY-based nonprofit founded in 1994 that delivers STEAM education, maternal health advocacy, and entrepreneurship programs to women, girls, and families of African descent in Westchester and Rockland Counties, New York.

Ownership category

akta.pro rank

Headquarters

HQ city

Yonkers

HQ country

United States

HQ region

North America

Offices2 records

Markets served

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Others

Revenue model

1. Membership Dues: Annual and monthly membership fees from individual members, students, seniors, and board members, providing access to workgroups, networking, and member-only events.
2. Donations and Charitable Contributions: Individual and corporate donations to support STEAM programs, scholarships, and organizational operations. STSI runs annual fundraising campaigns including Double Good popcorn sales and direct donation appeals.
3. Event Revenue: Ticket sales for conferences, celebrations, and community events including Day of Action conferences, Kwanzaa celebrations, and Pre-Mother's Day Jazz Brunch.
4. Grants and Foundation Funding: United Way administered grants and foundation support from organizations like Con Edison Foundation for STEAM programming.
5. Community Partner Membership: Business and organizational memberships at $125/year providing networking access and marketing opportunities within the STSI community.
6. Black Business Directory: Directory listing fees and premium marketing exposure offerings for Black-owned businesses.

Pricing tiers

Go-to-market motion1 record

Distribution channels5 records

Marketing channels8 records

Core offering

Sister to Sister International, Inc. (STSI) is a nonprofit organization delivering education, health advocacy, and community empowerment programs for women, girls, and families of African descent. Its core offerings include the annual STEAM Camp, year-round STEAM Academy, maternal health initiatives through the Westchester Black Maternal and Child Center of Excellence (WBMCCE), scholarship programs (Reach for the Stars), and tiered memberships that fund the four-pillar Platform for Action Workgroups covering Health & Wellness, Education, Global Affairs, and Entrepreneurship & Prosperity.

Product overview

Sister to Sister International, Inc. (STSI) is a non-profit organization offering a portfolio of programs focused on connecting, advancing, and strengthening women, girls, and families of African descent. The core offerings include the STEAM Camp (annual summer program), STEAM Academy (year-round programming), and Reach for the Stars Scholarship, alongside the Westchester Black Maternal and Child Center of Excellence. The organization also provides membership tiers (STEAM Family Membership, General Member, Student, Senior), a Black Business Directory platform, Community Partner Membership, and hosts signature events including the annual Day of Action Conference and Pre-Mother's Day Jazz Brunch. Programs operate through four Platform for Action Workgroups organized around Health & Wellness, Education, Global Affairs, and Entrepreneurship pillars.

Differentiator

Problem solved

Functional benefit

Brands

• STEAM Sistahs: A youth program under STSI focused on empowering young women of color through Science, Technology, Engineering, Arts, and Mathematics education and experiences.
• Westchester Black Maternal and Child Center of Excellence (WBMCCE)
• Reach for the Stars Scholarship
• STEAM Academy
• STEAM Camp
• Day of Action Conference

Products and services

• STEAM Camp Annual two-week summer program providing hands-on STEAM (Science, Technology, Engineering, Arts, Mathematics) experiences for young women of color, featuring workshops, field trips, and mentorship from professionals.
• STEAM Academy Year-round program offering monthly workshops, field trips, meetups, and tutoring for middle and high school Black girls and girls of color to explore STEAM fields and develop leadership skills.
• Reach for the Stars Scholarship Scholarship program awarding educational scholarships to students who complete STEAM Camp, supporting their journey to college.
• Westchester Black Maternal and Child Center of Excellence (WBMCCE) Initiative facilitating public awareness, improved social determinants of health, and elimination of racial biases affecting Black maternal health outcomes.
• Day of Action Conference Annual conference focusing on STEAM careers, health disparities, and advocacy for Black and Brown women and girls, featuring keynote speakers and breakout sessions.
• STEAM Family Membership Parent plus one child membership providing access to continuing education, professional development, workgroup participation, mentoring programs, event discounts, and priority access to STEAM Academy and Camp.
• STSI Black Business Directory Platform providing Black entrepreneurs and professionals with market visibility, networking opportunities, and business development support through directory listing and marketing outreach.
• Community Partner Membership Organizational membership for businesses joining collective impact workgroups and participating in STSI programs and events, targeting Black women consumers and community stakeholders.
• Platform for Action Workgroups Workgroups organized around four pillars: Juvenile and Social Justice, Entrepreneurship and Prosperity, Global Affairs, and Health and Wellness, focused on advancing women and families of African descent.

Quantifiable outcome

• 92% of campers reported increased confidence in public speaking, leadership, and STEAM skills
• +4 more outcomes

Named customers3 records

Segments5 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Twelve partnerships are on record, tiered core and minor.

• PepsiCocoreStrategic or Co-development PartnerPepsiCo Research & Development campus in Valhalla, NY hosts STSI students for hands-on R&D experiences, including visits to the Gatorade Sports Science Institute, focus group rooms, and product design labs. STSI Board Member Mara Calderon Guerra leads PepsiCo's involvement.
• Cold Spring Harbor Laboratory / DNA Learning CentercoreStrategic or Co-development PartnerCold Spring Harbor Laboratory's DNA Learning Center hosts STSI STEAM Academy students for hands-on experiments including enzyme activities and genetic learning experiences. Regeneron campus in Sleepy Hollow provides facilities for these programs.
• Regeneron PharmaceuticalscoreStrategic or Co-development PartnerRegeneron hosts STSI students for field trips including STEM challenges, networking with Black women scientists, and tours of the Regeneron Genetics Center. Board Member Dr. Chiatogu Onyewu serves as Senior Director at Regeneron and facilitates these partnerships.
• UKG (Ultimate Kronos Group)minorStrategic or Co-development PartnerUKG partnered with STSI to host a pilot Mentoring Circles program connecting professional women of color with STEAM Sistahs via Zoom. This was UKG's first corporate engagement of this kind with STSI.
• NCNW Westchester SectionminorGTM or Marketing PartnerNational Council of Negro Women Westchester Section provided support for STSI students to attend the HBCU NY Classic at MetLife Stadium, exposing students to Howard vs. Morehouse matchup and HBCU culture.
• Bridge to Africa Connection (BTAC)coreStrategic or Co-development PartnerSTSI maintains ongoing virtual connections with girls from Ghana through Bridge to Africa Connection, including book discussions and global sisterhood activities. This international linkage provides cross-continental dialogue and cultural exchange.
• Westchester Children's AssociationcoreStrategic or Co-development PartnerWestchester Children's Association partnered with STSI for the International Day of the Girl Conference at Manhattanville College, bringing together young women from across Westchester and Hudson Valley.
• Grace Baptist ChurchminorStrategic or Co-development PartnerSTSI collaborated with Grace Baptist Church for HBCU Weekend, supporting college access and aspiration through panels, financial aid workshops, and alumni networking.
• Consumer ReportsminorStrategic or Co-development PartnerConsumer Reports lab in Yonkers hosts STSI campers for tours of product-testing facilities, providing exposure to science, engineering, and data in consumer protection.
• Double GoodminorGTM or Marketing PartnerDouble Good provides a popcorn fundraising platform where STSI runs 4-day fundraising campaigns, retaining 50% of profits to support STEM/STEAM efforts for young girls of color.
• WWA NextGen / WWA Female Economic Empowerment Working GroupminorStrategic or Co-development PartnerWWA NextGen provides Lab Immersion Day experiences at Gorton High School for STSI campers, including hands-on Med-Tech simulations and career pathway exploration.
• Center for the Urban River at Beczak (CURB)minorStrategic or Co-development PartnerCURB provides environmental science field experiences including Hudson River seining activities and species identification, teaching ecosystem science and climate resilience.

Scale indicators6 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Black Girls CODE: National nonprofit focused on teaching coding and STEAM skills to Black girls, directly mirroring STSI's STEAM Camp/Academy model and target demographic, though operating at significantly larger scale across multiple U.S. cities.
• Black Mamas Matter Alliance: National advocacy alliance advancing Black maternal health, rights, and justice; highly comparable to STSI's WBMCCE initiative in mission focus and target population.

Broad incumbents

• Girls Inc. National nonprofit empowering girls through out-of-school programming in STEAM, leadership, and life skills; directly comparable to STSI's STEAM Camp and Academy programs though serving a broader demographic.
• KIPP Foundation: National network of charter schools focused on college preparation for underserved students; comparable to STSI's college access and HBCU exposure programming, though operating K-12 schools rather than supplemental programs.
• National Urban League: Large historic civil rights and urban advocacy organization with comparable work in education, health equity, and economic empowerment for African American communities.
• Black Women's Health Imperative: National nonprofit focused on Black women's health equity, including maternal health, directly comparable to STSI's WBMCCE subsidiary mission and its health and wellness pillar.
• National Black Child Development Institute (NBCDI): National organization focused on Black children and youth through education, health, and family support; comparable mission around youth development and family services for African American communities.
• National Council of Negro Women (NCNW): Established national advocacy organization for African American women; STSI's Westchester Section partnership with NCNW shows direct programmatic alignment on women's empowerment, education, and community organizing.

Emerging players

• The Loveland Foundation: Nonprofit supporting Black women and girls through therapy, community, and resources; comparable focus on Black women and girls' wellbeing though primary lens is mental health rather than STEAM education.
• TechGirls: Nonprofit focused on encouraging girls to pursue STEAM careers; comparable to STSI's STEAM Academy and Camp programs in mission though operating with different geographic reach.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xtwitter.com/STSIonthemove/media
• YouTubeyoutube.com/@stsiblackwomengirlchildini2476
• Facebookfacebook.com/sistertosisterinternational
• Instagraminstagram.com/stsiinternational
• LinkedInlinkedin.com/company/sister-to-sister-international

Revenue estimate

Valuation estimate

Number of profiles

Profiles10 records

Subsidiaries1 record

Funding overview

Funding rounds

Investors

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M&A

Investments

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Frequently asked questions about SISTER TO SISTER INTERNATIONAL INC