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Company details
Written by the company
co:sim is a global eSIM platform that helps travelers stay connected in over 200 destinations without swapping their physical SIM card. We sell prepaid data-only eSIM plans for short trips, long stays, and frequent business travel — from one-day passes to month-long packages, and from single countries like Japan, the United States, and the United Kingdom to multi-country bundles covering Europe, Southeast Asia, the Americas, and beyond. Activation is straightforward. After purchase, customers receive a QR code by email and can install the eSIM in a few steps on compatible iPhone and Android devices. Plans take effect once the device connects to a supported network at the destination, with no roaming surcharges and no contract. Our checkout supports major credit and debit cards, Apple Pay, Google Pay, Alipay, WeChat Pay, and Amazon Pay, and the entire experience — from browsing to support — is available in English, Simplified Chinese, Traditional Chinese, Japanese, Korean, and French. Real-time data usage alerts and expiry reminders are delivered through web push notifications and email, so travelers know how much data they have left before they need it. co:sim offers a self-service refund within 30 days for any eSIM that has not been installed, and our support team is reachable around the clock through live chat, email, and WhatsApp. For developers and AI agents, co:sim publishes a public API and OpenAPI specification, allowing assistants such as ChatGPT and Claude to search plans, prepare checkout links, and help travelers complete purchases on their behalf. Whether the trip is a weekend in Tokyo, a multi-country tour across Europe, or ongoing connectivity for a globally distributed team, co:sim is built to make mobile data abroad simple, transparent, and refundable.
Contact info
United States
- support@cosim.io
- cosim.io
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