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GatewayAPI

Global Messaging Platform - Supercharged with a Powerful SMS Gateway·gatewayapi.com

GatewayAPI is a global messaging platform (CPaaS) focused on A2P SMS, RCS Business Messaging and email services. It offers REST, SMPP and Simple HTTP APIs for sending SMS, RCS and email messages to recipients in over 200 countries, along with virtual numbers, keywords and number lookup services. The platform emphasizes GDPR compliance, EU data hosting options, and usage-based pricing with no subscriptions by default.

What it's for

Marketing messaging campaignsTransactional alerts and order updatesOne-time password (OTP) deliverySMS service messaging / urgent updatesTwo-way SMS communication (donations, sign-ups, appointments, opt-outs, feedback)Patient alerts and appointment remindersDelivery and logistics updatesCart recovery and targeted retail campaignsRCS Business Messaging with rich, interactive branded messages

Features 20

Automatic RCS-to-SMS fallback
Country blocking / geo permissions
Delivery status callbacks and webhooks
Email REST API with SPF/DKIM support
Email to/from SMS bridging
EU setup with hosting, ownership and routing within the EU
IP whitelisting
Keywords for two-way SMS communication
Messaging API for sending both SMS and RCS
Multi-account dashboard with unlimited admins and users
Number Lookup (HLR) service
RCS Business Messaging with rich media and interactive branded messages
REST API for sending SMS
Secret feature to prevent message content storage
Simple HTTP API for lightweight requests
SMPP API for high-volume SMS traffic
Traffic log and label statistics
URL whitelisting
Virtual numbers (short codes and long codes)
WordPress SMS plugin with 2-factor login support

At a glance

API

TypeWeb app

DeploymentCloud

PlatformsWeb

LanguagesDanish, English, German

Formarketing teams, sales teams, customer support teams, developers

CompanyONLINECITY.IO

Integrations

IntercomFacebook MessengerSalesforceGoogle SheetsSkypePrestaShopSugarCRMMakeBrevoWolfram AlphaWordPressZapierZoomDixaExcelGoogle CalendarKannelSMPPZendeskPipedriveMagentoMailchimpGoogle MailFlowizeCodeCanyonOffice 365SystematicWooCommerceCiceroShopifySlackMinubaApple Push

Complianceself-reported

GDPRISAE 3402ISAE 3000

Resources

Docs

Pricing

Pricing is usage-based: accounts are free to create, and by default there are no subscriptions — customers pay only for messages sent (except in countries requiring a short code). SMS prices vary across 200+ countries; RCS prices start from 0.0410 EUR per message, shown per operator. High-volume customers can contact sales for custom pricing.

Free AccountFree

By default there are no monthly subscriptions or fees, except in countries that require a short code.

Account creation and maintenance is free; usage charges apply only for messages sent.

SMS (Pay as you go)Quote

No monthly subscription by default, except in countries requiring a short code.

RCS (Pay as you go)Quote

Premium/in-depth support via phone or video available by contacting the company.

Discounted prices offered for high-volume clients; contact sales to have price calculated.