Developer docs
API playgroundTry for free, no card

Search company profiles

University of Mandalay

Full company profile

uuid003pueh

Namestring
University of Mandalay
Legal namestring
University of Mandalay
Websiteurl
mu.edu.mm
Company typeenum
Private
Founded yearint
1925
Descriptiontext

The University of Mandalay is a public higher-education institution located at 73rd Street, Mandalay, Myanmar, founded in 1925 as one of only two earliest universities in the country, with Yangon University being the earliest. It operates under the Myanmar Ministry of Education and is positioned as a leading national research university in Upper Myanmar. The Rector is Dr. Thidar Win, with Dr. Tin Tun Aung, Dr. Myintzu Min, Dr. Min Min Yee, and Dr. Tin Run Aung serving as Pro-Rectors. The institution reports 10,000+ employees and serves domestic and international students at undergraduate, postgraduate, diploma, and certificate levels.

The university delivers education through approximately 20 academic departments spanning humanities, sciences, and professional studies — including Anthropology, Archaeology, Chemistry, Computer Science, Economics, Geography and Environmental Studies, Geology, Law, Physics, and Psychology — organized into roughly 30 programs. Specialized offerings include a Postgraduate Diploma in GIS (PGDGIS), Remote Sensing training, and Job-Ready Skills vocational courses. Research is coordinated through the Center for Research and Innovation (CRI) and the University Research Centre (URC). Technology infrastructure consists of standard academic facilities plus dedicated GIS and Remote Sensing labs. The university hosted its centenary celebration in October 2025.

Revenue is generated primarily through government allocation and student tuition/fees, supplemented by event-based income from co-organized conferences such as the International Tea Symposium (100 USD per international participant; 30,000 MMK per local participant). The student acquisition motion operates through national education system channels, orientation programs, a dedicated international admission office, and an official website (mu.edu.mm) with a Facebook social channel. The university maintains 34 international institutional partnerships across 15 countries (Germany, Japan, Singapore, Korea, Thailand, Australia, UK, USA, China, Austria, Switzerland, Sweden, Italy, Hungary, Denmark), established between 2013 and 2018, with active programs including the EU-funded Erasmus+ CHINLONE project (2017-2020) led in coordination with the University of Bologna.

Short descriptiontext

The University of Mandalay is a public research university in Mandalay, Myanmar, founded in 1925 as the country's second-oldest university, delivering undergraduate, postgraduate, diploma, and certificate programs across 20+ academic departments to domestic and international students.

Operating statusenum
Operating
Ownership categoryenum
Headcount rangeband
10,001+
akta.pro rankint
HeadquartersMandalay, Myanmar (Burma)
HQ citystring
Mandalay
HQ countrystring
Myanmar (Burma)
HQ regionstring
Asia
Markets served

Serves global market

Offices1 record

Each record includes

City, Country, Type, Description, Source

Keyword5 values
higher education services, university degree programs, academic research services, postgraduate education, professional training programs
NAICS code1 code
  • Colleges, Universities, and Professional Schools6113
SIC code1 code
  • Services-Educational Services8200
Product category
Higher Education
GTM motion1 record

Each record includes

Type, Description, Source

Revenue model3 records
1Tuition and Academic Fees
TypeSubscription Recurring
Description

Public university funded through government allocation and student tuition/fees for undergraduate, postgraduate, diploma, and certificate programs.

mu.edu.mm
2Conference and Event Registration Fees
TypeOne Time License
Description

Revenue generated from symposium and conference registration fees including International Tea Symposium.

mu.edu.mm
3Financial Aid Programs
TypeSubscription Recurring
Description

Government-supported financial aid available for all enrolled students.

mu.edu.mm
Marketing channels4 records

Each record includes

Title, Type, Stage, Description, Source

Distribution channels3 records

Each record includes

Title, Type, Scope, Target buyer, Description, Source

Cost components5 values
Personnel, Operations, Infrastructure, Technology or R&D, Others
Pricing details2 tiers
1International Participant Conference Registration
ModelOne time/ perpetual licenseBilling cadencePay-as-you-go
Notes

100 USD per participant

mu.edu.mm
2Local Participant Conference Registration
ModelOne time/ perpetual licenseBilling cadencePay-as-you-go
Notes

30,000 MMK per local participant

mu.edu.mm
GTM typeB2C
B2C
Offering typeServices
Services
Core offering1 text field

The University of Mandalay is a public higher education institution that delivers undergraduate, postgraduate, diploma, and certificate academic programs across 17 departments and 30 programs, covering humanities, sciences, and professional disciplines. It also operates research initiatives through the Center for Research and Innovation (CRI), specialized training such as GIS and Remote Sensing certification (including PGDGIS), Job-Ready Skills vocational courses, and academic events such as the International Tea Symposium.

Differentiator
Functional benefit
Problem solved
Quantifiable outcome1 of 2 values shown
  • 30 academic programs across 17 departments serving undergraduate and postgraduate students
+1 more record
Product overview1 text field

University of Mandalay is a public higher education institution offering undergraduate, postgraduate, diploma, and certificate programs across 20+ academic departments. The institution provides educational services through various programs including research initiatives via the Center for Research and Innovation (CRI), international collaboration programs, and specialized training such as Remote Sensing and GIS certification programs.

Product and service8 records
1Undergraduate Degree Programs
CategoryAcademic Degree Programs
Description

Bachelor's-level degree programs across humanities, sciences, and professional disciplines for domestic and international students, delivered through 17 academic departments on the Mandalay campus.

2Postgraduate Programs
CategoryAcademic Degree Programs
Description

Master's and doctoral degree programs offered across various academic disciplines, including PhD preparatory courses, for students pursuing advanced study and research.

3Diploma Programs
CategoryAcademic Diploma Programs
Description

Diploma-level academic programs offered through the university's admissions framework, including professional diploma pathways across multiple departments.

4Certificate Programs
CategoryAcademic Certificate Programs
Description

Certificate-level academic programs offered through the university's admissions framework, supporting specialized learning and professional development.

5Center for Research and Innovation (CRI)
CategoryResearch Services
Description

University research center dedicated to fostering innovation and supporting research projects across disciplines, including 100-day research initiatives and progressive reporting, serving faculty, postgraduate students, and partner institutions.

6International Tea Symposium
CategoryAcademic Conferences and Symposia
Description

Annual international academic symposium focused on tea research, culture, and industry collaboration, co-organized with the Myanmar Tea Producer and Exporter Association; registration fees are 100 USD for international participants and 30,000 MMK for local participants.

7GIS and Remote Sensing Training
CategoryProfessional Training Programs
Description

Certificate programs in Geographic Information Systems and Remote Sensing, including the Postgraduate Diploma in GIS (PGDGIS), for students and professionals seeking technical geospatial credentials.

8Job-Ready Skills Training
CategoryVocational Training Programs
Description

Vocational skill development programs designed to enhance employment readiness for enrolled students and adult learners.

Scale indicator3 records

Each record includes

Type, Value, Description, Source

Partnership13 partners
Strategic tierMinorTypeStrategic or Co-development PartnerAnnounced on2020-02-24
Description

Co-organizer of the International Tea Symposium hosted at the university, focusing on tea industry collaboration and economic development through university-industry partnerships.

Strategic tierMinorTypeStrategic or Co-development PartnerAnnounced on2019-01-06
Description

Sakura Science Exchange Program partner providing international science exchange opportunities for students.

Strategic tierMinorTypeStrategic or Co-development PartnerAnnounced on2018-03-05
Description

International academic collaboration established March 2018.

Strategic tierCoreTypeStrategic or Co-development PartnerAnnounced on2017-01-01
Description

CHINLONE project coordinator - a three-year (2017-2020) international project in Higher Education funded by the European Union in the frame of Erasmus+ Capacity Building Key Action 2. Project aims to modernize Myanmar's Higher Education System.

Strategic tierMinorTypeStrategic or Co-development PartnerAnnounced on2016-03-08
Description

Supplemental MoU signed for collaboration in research, academic and student exchange programmes.

6University of Florence, Italy
Strategic tierMinorTypeStrategic or Co-development PartnerAnnounced on2015-10-31
Description

International academic partnership established October 2015.

mu.edu.mm
7Centre for GeoGenetics, Natural History Museum of Denmark, University of Copenhagen
Strategic tierMinorTypeStrategic or Co-development PartnerAnnounced on2015-06-24
Description

International research collaboration established June 2015 for geoGenetics research.

mu.edu.mm
8University of Oxford, Department of Earth Sciences
Strategic tierMinorTypeStrategic or Co-development PartnerAnnounced on2014-07-17
Description

International academic partnership with Oxford's Earth Sciences department established July 2014.

mu.edu.mm
Strategic tierMinorTypeStrategic or Co-development PartnerAnnounced on2014-05-22
Description

International academic collaboration established May 2014.

Strategic tierMinorTypeStrategic or Co-development PartnerAnnounced on2014-03-15
Description

International academic partnership established March 2014.

Strategic tierMinorTypeStrategic or Co-development PartnerAnnounced on2014-02-19
Description

International academic collaboration with Singapore institutions established February 2014.

Strategic tierMinorTypeStrategic or Co-development PartnerAnnounced on2013-11-14
Description

International academic partnership established November 2013 for research collaboration.

Strategic tierMinorTypeStrategic or Co-development PartnerAnnounced on2013-08-10
Description

International academic collaboration established August 2013 for research and student exchange programs.

Recent move5 records

Each record includes

Date, Type, Title, Description, Source

Expansion highlight5 records

Each record includes

Type, Description

Peers10 records
TypeRegional player
Description

Major private research university in the Philippines comparable in comprehensive arts/sciences offerings and ASEAN regional positioning, though operated under different governance (private vs. public).

TypeDirect peer
Description

One of South Asia's oldest public universities (founded 1857), with similar heritage positioning, large public-university scale, and comprehensive arts/science curriculum as a counterpart South Asian institution.

TypeBroad incumbent
Description

Italian research university and strategic partner (CHINLONE project coordinator). Comparable as a centuries-old public research university with similar internationalization mandate and Erasmus+ program participation.

TypeBroad incumbent
Description

Singapore's flagship public research university, established 2014 partnership with Mandalay University. Comparable as a leading Southeast Asian public research university with strong international research orientation.

TypeRegional player
Description

Thailand's oldest and most prestigious public university. Comparable as a regional public research university in Southeast Asia with similar comprehensive program offerings and international collaboration model.

TypeDirect peer
Description

The oldest and most prestigious public university in Myanmar, located in Yangon. Directly comparable as Myanmar's other early founding university and primary competitor for top students and faculty across all major disciplines.

TypeDirect peer
Description

Large public university in Yangon offering similar comprehensive undergraduate and postgraduate programs across multiple faculties. Direct peer competing for Myanmar's national student pool.

TypeDirect peer
Description

Myanmar's leading public technical university, comparable as a government-funded research university with international STEM partnerships and large student enrollment.

TypeBroad incumbent
Description

Swedish research university established 2018 partnership with Mandalay University. Comparable as an established European public research university with strong international research collaboration programs.

10Yadanabon University
TypeDirect peer
Description

Another major public university in Myanmar located near Mandalay. Directly comparable as a domestic public university serving overlapping student populations in the Mandalay/Upper Myanmar region.

Market position
Strengths4 records

Each record includes

Headline, Details, Source

Weaknesses4 records

Each record includes

Headline, Details, Source

Competitive moat4 records

Each record includes

Type, Details

Key risks5 records

Each record includes

Headline, Details, Source

Key highlights6 records

Each record includes

Headline, Details, Source

Customer concentration

Classification, Details

Named customers3 records

Each record includes

Name, Industry, Type, Use case, Source, UUID

Segment3 records

Each record includes

Title, Type, Primary, Description, Pain point addressed, Use case, Source

Ideal customer profile3 records

Each record includes

Profile, Firmographic size, Sales motion, Sales cycle length, Buying structure, Purchase trigger, Buyer persona, Geography, Industry vertical, Primary use case, Description, Pain points, Evidence proof points, Target buyer

Technology focused
No
API detail
Has APIbool
No

Docs URL, Description

AI maturity
App detail

Has app

Feature1 record

Each record includes

Title, Differentiator, Description, Source

Core technology
Revenue estimate
Valuation estimate
Number of profiles
Profiles5 records

Each record includes

Name, Designation, Designation category, Overview, Profile commentary, Source

No data
No data
Funding overview

Funding stage, Last funding date, Total funding USD

Funding rounds

Each record includes

Round, Amount USD, Date, Pre money valuation, Total investors, Investors, News

Investors

Each record includes

Name, Type, Date of entry, Rounds participated, Website

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

M&A

Each record includes

Name, Acquisition type, Announced date, Completed date, Status, Website, News

Investment

Each record includes

Name, Round, Announced date, Lead investor, Website, News

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

University of Mandalay

Higher Educationmu.edu.mm

The University of Mandalay is a public research university in Mandalay, Myanmar, founded in 1925 as the country's second-oldest university, delivering undergraduate, postgraduate, diploma, and certificate programs across 20+ academic departments to domestic and international students.

What University of Mandalay does

The University of Mandalay is a public higher-education institution located at 73rd Street, Mandalay, Myanmar, founded in 1925 as one of only two earliest universities in the country, with Yangon University being the earliest. It operates under the Myanmar Ministry of Education and is positioned as a leading national research university in Upper Myanmar. The Rector is Dr. Thidar Win, with Dr. Tin Tun Aung, Dr. Myintzu Min, Dr. Min Min Yee, and Dr. Tin Run Aung serving as Pro-Rectors. The institution reports 10,000+ employees and serves domestic and international students at undergraduate, postgraduate, diploma, and certificate levels.

The university delivers education through approximately 20 academic departments spanning humanities, sciences, and professional studies — including Anthropology, Archaeology, Chemistry, Computer Science, Economics, Geography and Environmental Studies, Geology, Law, Physics, and Psychology — organized into roughly 30 programs. Specialized offerings include a Postgraduate Diploma in GIS (PGDGIS), Remote Sensing training, and Job-Ready Skills vocational courses. Research is coordinated through the Center for Research and Innovation (CRI) and the University Research Centre (URC). Technology infrastructure consists of standard academic facilities plus dedicated GIS and Remote Sensing labs. The university hosted its centenary celebration in October 2025.

Revenue is generated primarily through government allocation and student tuition/fees, supplemented by event-based income from co-organized conferences such as the International Tea Symposium (100 USD per international participant; 30,000 MMK per local participant). The student acquisition motion operates through national education system channels, orientation programs, a dedicated international admission office, and an official website (mu.edu.mm) with a Facebook social channel. The university maintains 34 international institutional partnerships across 15 countries (Germany, Japan, Singapore, Korea, Thailand, Australia, UK, USA, China, Austria, Switzerland, Sweden, Italy, Hungary, Denmark), established between 2013 and 2018, with active programs including the EU-funded Erasmus+ CHINLONE project (2017-2020) led in coordination with the University of Bologna.

University of Mandalay firmographics

Firmographics
Name
University of Mandalay
Legal name
University of Mandalay
Website
https://mu.edu.mm
Company type
Private
Founded year
1925
Operating status
Operating
Headcount range
10,001+ employees
Short description
The University of Mandalay is a public research university in Mandalay, Myanmar, founded in 1925 as the country's second-oldest university, delivering undergraduate, postgraduate, diploma, and certificate programs across 20+ academic departments to domestic and international students.
Ownership category
akta.pro rank

Where University of Mandalay is headquartered

Location

Headquarters

HQ city
Mandalay
HQ country
Myanmar (Burma)
HQ region
Asia

Offices1 record

Markets served

University of Mandalay business model

Business model
GTM type
B2C
Offering type
Services
Cost components
Personnel, Operations, Infrastructure, Technology or R&D, Others

Revenue model

  1. Tuition and Academic Fees: Public university funded through government allocation and student tuition/fees for undergraduate, postgraduate, diploma, and certificate programs.
  2. Conference and Event Registration Fees: Revenue generated from symposium and conference registration fees including International Tea Symposium.
  3. Financial Aid Programs: Government-supported financial aid available for all enrolled students.

Pricing tiers

ModelBillingPrice
One time/ perpetual licensePay-as-you-goInternational Participant Conference Registration
One time/ perpetual licensePay-as-you-goLocal Participant Conference Registration

Go-to-market motion1 record

Distribution channels3 records

Marketing channels4 records

University of Mandalay product offering

Product offering

Core offering

The University of Mandalay is a public higher education institution that delivers undergraduate, postgraduate, diploma, and certificate academic programs across 17 departments and 30 programs, covering humanities, sciences, and professional disciplines. It also operates research initiatives through the Center for Research and Innovation (CRI), specialized training such as GIS and Remote Sensing certification (including PGDGIS), Job-Ready Skills vocational courses, and academic events such as the International Tea Symposium.

Product overview

University of Mandalay is a public higher education institution offering undergraduate, postgraduate, diploma, and certificate programs across 20+ academic departments. The institution provides educational services through various programs including research initiatives via the Center for Research and Innovation (CRI), international collaboration programs, and specialized training such as Remote Sensing and GIS certification programs.

Differentiator

Problem solved

Functional benefit

Products and services

  • Undergraduate Degree Programs Bachelor's-level degree programs across humanities, sciences, and professional disciplines for domestic and international students, delivered through 17 academic departments on the Mandalay campus.
  • Postgraduate Programs Master's and doctoral degree programs offered across various academic disciplines, including PhD preparatory courses, for students pursuing advanced study and research.
  • Diploma Programs Diploma-level academic programs offered through the university's admissions framework, including professional diploma pathways across multiple departments.
  • Certificate Programs Certificate-level academic programs offered through the university's admissions framework, supporting specialized learning and professional development.
  • Center for Research and Innovation (CRI) University research center dedicated to fostering innovation and supporting research projects across disciplines, including 100-day research initiatives and progressive reporting, serving faculty, postgraduate students, and partner institutions.
  • International Tea Symposium Annual international academic symposium focused on tea research, culture, and industry collaboration, co-organized with the Myanmar Tea Producer and Exporter Association; registration fees are 100 USD for international participants and 30,000 MMK for local participants.
  • GIS and Remote Sensing Training Certificate programs in Geographic Information Systems and Remote Sensing, including the Postgraduate Diploma in GIS (PGDGIS), for students and professionals seeking technical geospatial credentials.
  • Job-Ready Skills Training Vocational skill development programs designed to enhance employment readiness for enrolled students and adult learners.

Quantifiable outcome

  • 30 academic programs across 17 departments serving undergraduate and postgraduate students
  • +1 more outcomes

Companies that use University of Mandalay

Customer profile

Named customers3 records

Segments3 records

Ideal customer profiles3 records

University of Mandalay technology and API

Technology

Technology focussed No

API detail

Has API
No
API docs
API detail

Core technology

AI maturity

App detail

Feature1 record

University of Mandalay partnerships and signals

Strategic signal

Partnerships

13 partnerships are on record, tiered minor and core.

  • Myanmar Tea Producer and Exporter AssociationminorStrategic or Co-development Partner · 24 February 2020Co-organizer of the International Tea Symposium hosted at the university, focusing on tea industry collaboration and economic development through university-industry partnerships.
  • National Institute of Advanced Industrial Science and Technology (AIST), JapanminorStrategic or Co-development Partner · 6 January 2019Sakura Science Exchange Program partner providing international science exchange opportunities for students.
  • Lund University, SwedenminorStrategic or Co-development Partner · 5 March 2018International academic collaboration established March 2018.
  • University of BolognacoreStrategic or Co-development Partner · 1 January 2017CHINLONE project coordinator - a three-year (2017-2020) international project in Higher Education funded by the European Union in the frame of Erasmus+ Capacity Building Key Action 2. Project aims to modernize Myanmar's Higher Education System.
  • Yunnan University, ChinaminorStrategic or Co-development Partner · 8 March 2016Supplemental MoU signed for collaboration in research, academic and student exchange programmes.
  • University of Florence, ItalyminorStrategic or Co-development Partner · 31 October 2015International academic partnership established October 2015.
  • Centre for GeoGenetics, Natural History Museum of Denmark, University of CopenhagenminorStrategic or Co-development Partner · 24 June 2015International research collaboration established June 2015 for geoGenetics research.
  • University of Oxford, Department of Earth SciencesminorStrategic or Co-development Partner · 17 July 2014International academic partnership with Oxford's Earth Sciences department established July 2014.
  • King Mongkut's University of Technology Thonburi, ThailandminorStrategic or Co-development Partner · 22 May 2014International academic collaboration established May 2014.
  • Dongguk University, KoreaminorStrategic or Co-development Partner · 15 March 2014International academic partnership established March 2014.
  • National University of Singapore and Singapore Management UniversityminorStrategic or Co-development Partner · 19 February 2014International academic collaboration with Singapore institutions established February 2014.
  • Meijo University, JapanminorStrategic or Co-development Partner · 14 November 2013International academic partnership established November 2013 for research collaboration.
  • Cologne University, GermanyminorStrategic or Co-development Partner · 10 August 2013International academic collaboration established August 2013 for research and student exchange programs.

Scale indicators3 records

Recent moves5 records

Expansion highlights5 records

University of Mandalay competitors and assessment

Company assessment

Regional players

  • Ateneo de Manila University: Major private research university in the Philippines comparable in comprehensive arts/sciences offerings and ASEAN regional positioning, though operated under different governance (private vs. public).
  • Chulalongkorn University: Thailand's oldest and most prestigious public university. Comparable as a regional public research university in Southeast Asia with similar comprehensive program offerings and international collaboration model.

Direct peers

  • University of Calcutta: One of South Asia's oldest public universities (founded 1857), with similar heritage positioning, large public-university scale, and comprehensive arts/science curriculum as a counterpart South Asian institution.
  • University of Yangon: The oldest and most prestigious public university in Myanmar, located in Yangon. Directly comparable as Myanmar's other early founding university and primary competitor for top students and faculty across all major disciplines.
  • Dagon University: Large public university in Yangon offering similar comprehensive undergraduate and postgraduate programs across multiple faculties. Direct peer competing for Myanmar's national student pool.
  • Yangon Technological University: Myanmar's leading public technical university, comparable as a government-funded research university with international STEM partnerships and large student enrollment.
  • Yadanabon University: Another major public university in Myanmar located near Mandalay. Directly comparable as a domestic public university serving overlapping student populations in the Mandalay/Upper Myanmar region.

Broad incumbents

  • University of Bologna: Italian research university and strategic partner (CHINLONE project coordinator). Comparable as a centuries-old public research university with similar internationalization mandate and Erasmus+ program participation.
  • National University of Singapore: Singapore's flagship public research university, established 2014 partnership with Mandalay University. Comparable as a leading Southeast Asian public research university with strong international research orientation.
  • Lund University: Swedish research university established 2018 partnership with Mandalay University. Comparable as an established European public research university with strong international research collaboration programs.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

University of Mandalay social profiles

Digital presence

University of Mandalay financial estimates

Financial estimate

Revenue estimate

Valuation estimate

University of Mandalay leadership team

Management profile

Number of profiles

Profiles5 records

University of Mandalay funding detail

Funding detail

Funding overview

Funding rounds

Investors

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

University of Mandalay M&A and investment

M&A and investment

M&A

Investments

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

Frequently asked questions about University of Mandalay

What does University of Mandalay do?

The University of Mandalay is a public higher education institution that delivers undergraduate, postgraduate, diploma, and certificate academic programs across 17 departments and 30 programs, covering humanities, sciences, and professional disciplines. It also operates research initiatives through the Center for Research and Innovation (CRI), specialized training such as GIS and Remote Sensing certification (including PGDGIS), Job-Ready Skills vocational courses, and academic events such as the International Tea Symposium.

Is University of Mandalay a public or private company?

University of Mandalay is a private company. It is classified as state government owned and is currently operating.

When was University of Mandalay founded?

University of Mandalay was founded in 1925. It employs 10,001+ people.

Where is University of Mandalay based?

University of Mandalay is headquartered in Mandalay, Myanmar (Burma), in the Asia region.

How does University of Mandalay make money?

Three revenue lines are on record. Tuition and Academic Fees are the primary driver. The others are conference and Event Registration Fees and financial Aid Programs.

Who are University of Mandalay's main competitors?

Regional players on record are Ateneo de Manila University and Chulalongkorn University. Direct peers are University of Calcutta, University of Yangon, Dagon University, Yangon Technological University and Yadanabon University. Broad incumbents are University of Bologna, National University of Singapore and Lund University.

Does University of Mandalay have an API?

No public API is recorded for University of Mandalay.

Unlock the full company data

50 free credits on sign-up, no credit card required.

Contact sales