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.
Real-time order and shipping notifications customers can rely on.
One-time passwords and 2FA codes that arrive in seconds.
Timely reminders that reduce no-shows and keep customers engaged.
A rare combination of local depth and
global reach
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.
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.
Reliable text messaging for OTP, alerts, and notifications.
Long messages beyond 160 characters, delivered as one.
Alimtalk & Friendtalk brand messages with SMS fallback.
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.
Integrate SMS and messaging workflows into applications, CRMs, commerce systems, and internal tools.
Optimize delivery paths across domestic carrier connections and global network partnerships.
Track delivery reports, status changes, and message performance as operational data.
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.
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.
- SureM Co., Ltd.
- Founded in 2000
- 26 years of experience
- Korea-based business messaging infrastructure provider
- SMS, LMS, MMS
- RCS Business Messaging
- Kakao Messaging
- Voice OTP
- Global SMS
- HTTP / SMPP API
- Direct connections to all three Korean carriers (SKT, KT, LG U+)
- Mobile networks in 200+ countries
- Global and local routing expertise
- Global messaging partners
- Foreign-invested companies in Korea
- Korean enterprises and brands
- Developers and platforms
- Marketing, CRM, authentication, and notification teams
- From global markets into Korea
- From Korea to overseas customers
- 26 years of experience
- Local Korean carrier connectivity
- Global reach
- Enterprise support
- Multilingual operations
- 24/7 support
Frequently asked questions
Common questions about SureM's company history, global offices, certifications, and services.
Build your messaging future with SureM
Partner with a trusted messaging infrastructure provider connecting businesses across Korea and more than 200 countries.
SureM is a Korea-based business messaging infrastructure provider with 26 years of experience. SureM helps global messaging partners, foreign-invested companies in Korea, and Korean enterprises deliver SMS, LMS, MMS, RCS, Kakao, WhatsApp Business, Voice OTP, and international messages through reliable local network connectivity and global messaging reach.