Trusted Business Messaging,
built in Korea for the world
A South Korea-based business messaging platform and SMS API provider, delivering reliable SMS, C-SMS, KakaoTalk, and RCS business messaging to companies in Korea and 200+ countries - trusted since 2000.
The name "SureM" stands for Sure Message
SureM Co., Ltd. is a South Korea-based business messaging platform and SMS API provider founded in 2000. The name "SureM" stands for Sure Message - our founding promise to deliver every message reliably, every time.
For more than 26 years, we have helped businesses turn everyday notifications into trusted moments: an order confirmed, a one-time password delivered, an appointment remembered. From transactional SMS and two-factor authentication (2FA) to rich media RCS campaigns and KakaoTalk Alimtalk notifications, SureM covers every stage of the customer communication journey.
We provide a full range of business messaging solutions - SMS, C-SMS (long messaging), next-generation RCS, and KakaoTalk Biz Messages (Alimtalk and Friendtalk Brand Messages) - all from a single, dependable partner.
What sets SureM apart is the rare combination of local depth and global reach. We connect directly to all three Korean carriers - SKT, KT, and LG U+ - with no intermediate hubs, ensuring the lowest latency and highest compliance for Korean SMS and RCS delivery. Our global network spans mobile networks in 200+ countries, making SureM one of the few providers offering genuine two-way international messaging both outbound from Korea and inbound to Korea - at a delivery success rate of over 97%.
With a programmable SMS API, intelligent routing, two-way messaging, real-time delivery reports, and automated failover, businesses can integrate SureM into CRM, ERP, and e-commerce systems with minimal development effort. Trusted by thousands of enterprises and developers, SureM pairs deep Korea and Asia expertise with worldwide connectivity to make business communication simple, secure, and dependable - wherever your customers are.
Everyday notifications, turned into trusted moments
From transactional SMS and 2FA to RCS campaigns and KakaoTalk Alimtalk - SureM covers every stage of the customer communication journey.
An order confirmed
Real-time order and shipping notifications customers can rely on.
A password delivered
One-time passwords and 2FA codes that arrive in seconds.
An appointment remembered
Timely reminders that reduce no-shows and keep customers engaged.
A rare combination of local depth and global reach
Local depth in Korea
We connect directly to all three Korean carriers - with no intermediate hubs - ensuring the lowest latency and highest compliance for Korean SMS and RCS delivery.
Global reach worldwide
Our global network spans mobile networks in 200+ countries - making SureM one of the few providers offering genuine two-way international messaging, both outbound from Korea and inbound to Korea, at a 97%+ delivery success rate.
A full range of business messaging channels
Everything you need to reach customers - all from a single platform.
SMS
Reliable text messaging for OTP, alerts, and notifications.
C-SMS
Long messages beyond 160 characters, delivered as one.
KakaoTalk Biz
Alimtalk & Friendtalk brand messages with SMS fallback.
Next-gen RCS
Branded, interactive rich messaging in the native inbox.
Integrate in days, not months
With programmable APIs, intelligent routing, two-way messaging, real-time delivery reports, and automated failover, businesses can integrate SureM into CRM, ERP, and e-commerce systems with minimal development effort.
Programmable API
Integrate SMS and messaging workflows into applications, CRMs, commerce systems, and internal tools.
Intelligent routing
Optimize delivery paths across domestic carrier connections and global network partnerships.
Real-time reports
Track delivery reports, status changes, and message performance as operational data.
Automated failover
Fallback routing helps preserve reach when a channel, route, or delivery condition changes.
Awards & Certifications
A record of public recognition, technology certification, and responsible business operation.
Frequently asked questions
What is SureM and what does it do?
SureM is a South Korean business messaging company founded in 2000. It provides SMS, C-SMS, KakaoTalk Alimtalk & Friendtalk, and RCS business messaging to enterprises in Korea and over 200 countries, via direct carrier connections to SKT, KT, and LG U+.
Is SureM an SMS API provider?
Yes. SureM offers a programmable SMS API and messaging API that developers can integrate into applications, CRMs, and e-commerce platforms for automated notifications, OTP delivery, marketing campaigns, and two-way messaging.
What countries does SureM support?
SureM supports SMS and messaging delivery in 200+ countries worldwide, with direct carrier relationships in South Korea (SKT, KT, LG U+) and global routing partnerships for international coverage.
SureM: Korea Messaging Infrastructure Provider
SureM supports two-way global messaging - helping global partners send messages into Korea, and helping Korean companies send SMS, OTP, notifications, and marketing messages to customers overseas. SureM also supports foreign-invested companies and global brands operating in Korea, helping them communicate with Korean customers through SMS, RCS, Kakao, OTP, and marketing messages.
Who We Are
- SureM Co., Ltd.
- Founded in 2000
- 26 years of experience
- Korea-based business messaging infrastructure provider
What We Do
- SMS, LMS, MMS
- RCS Business Messaging
- Kakao Messaging
- Voice OTP
- Global SMS
- HTTP / SMPP API
Our Network
- Direct connections to all three Korean carriers (SKT, KT, LG U+)
- Mobile networks in 200+ countries
- Global and local routing expertise
Who We Serve
- Global messaging partners
- Foreign-invested companies in Korea
- Korean enterprises and brands
- Developers and platforms
- Marketing, CRM, authentication, and notification teams
Two-Way Global Messaging
- From global markets into Korea
- From Korea to overseas customers
Why SureM
- 26 years of experience
- Local Korean carrier connectivity
- Global reach
- Enterprise support
- Multilingual operations
- 24/7 support
Ready to reach your customers?
Explore our messaging services or talk to our team about your use case - across Korea and 200+ countries.
SureM Co., Ltd.
Korea-based messaging infrastructure provider.
Founded in 2000 - 26 years of experience.
Company at a glance
- Direct connections to Korean carriers (SKT, KT, LG U+)
- 200+ countries covered
- 6,000+ enterprise clients
- 1.5M+ individual subscribers
- Inbound messaging to Korea
- Outbound global messaging from Korea