GatewayAPI Alternatives (September 2025)

Get your message across. One account, so many ways to send.

The all-in-one solution for all your business texting needs - marketing campaigns, two-way SMS chats, notifications, and staff communication.

🚀Boost your text message marketing with speeds up to 1000 SMS per second. FREE Trial and instant FREE Text Number, start today...

Unlock meaningful conversations across the customer journey with programmable SMS, voice, email, video, & verification APIs!

Mobile Text Alerts allows you to send mass texts to your customers & employees with no hassle. Get started for free & create your text alert system in seconds.

Plivo’s SMS API and Voice API platform enables businesses to communicate with their customers on a global scale. Sign up for free now.

Sell more w/ a bulk SMS service, email marketing, TTS, 2FA, voice calls & messaging apps integration w/ advanced API communication platform.

Featuring fast registration and powerful tools, EZ Texting is the best mass texting service for sending bulk SMS marketing messages and MMS messaging. Start your free trial today!

Start sending transactional and marketing email in minutes. Easily scale to enterprise-volume with Twilio SendGrid’s Email API. Try it free!

SendHub offers bulk text messaging and marketing for businesses to manage their SMS campaigns. Finally, business communication services made easy.

Start sending emails with our top-rated service. Sign up for free now to streamline your email sending process with API or SMTP.

SMTP2GO is the scalable, reliable email deliverability solution. Worldwide servers, a robust API, and powerful reporting set us apart. Try our free plan!

Salesmsg is a texting platform with all the software, integrations, and resources you need for SMS marketing, sales outreach, customer service and your business.

Communications API for chat, AI chatbots, SMS, WhatsApp, voice, video, KakaoTalk, and in-app notifications with Sendbird's all-in-one communications API platform.

Integrate in minutes and send transactional emails via our REST API or SMTP. Scale with our reliable global infrastructure and deliver emails to your customer's inbox instantly.

Boost your communication strategy with Sakari's SMS marketing software, featuring workflow automation, seamless integration, and in-depth analytics.

MSG91 cloud communications platform integrates cloud-based voice, video, messaging, chat, & collaboration into any app, service, or business process. Request a demo for cloud based communication today!

Keep people informed when it matters most with Text-Em-All. Mass text messaging or calling. Try it free today.

Powerful Transactional Email APIs that enable you to send, receive, and track emails, built with developers in mind. Learn more today!

Connect with customers on their preferred channels—anywhere in the world. Quickly integrate powerful communication APIs to start building solutions for SMS and WhatsApp messaging, voice, and email.

Communicate with customers via the channel of their choice – SMS, social and integrations. All via our messaging platform for businesses. United States

Grow your business with SMS marketing software and agency-level text message marketing services. The only company to provide a 5X ROI guaranteed.

Telnyx offers solutions tailored to your industry needs, from AI to call tracking. Enhance your business capabilities with our specialized solutions.

Courier is a notification API built for developers. Design once, and deliver to any channel – email, Slack, SMS, push, and more – all through a single API.

Our API Management platform is fast, scalable, modern. Including an open source API Gateway, Analytics, Dev Portal and Dashboard.

Ensure communication with customers and suppliers, modernize messaging infrastructures and automate manual business processes thanks to Retarus’ intelligent cloud solutions.

We make text message marketing and SMS marketing easy. Increase revenue and build customer loyalty with our SMS marketing software.

Use the text messaging service 17,000+ businesses trust. Send SMS marketing campaigns, receive texts, and message one-on-one.

Trusted by the fastest growing brands in over 78 countries. Wati is the #1 end-to-end WhatsApp API solution for SMBs across the globe.

Looking for a business text messaging software that will help you stay connected with your customers? Look no further than Avochato! Our easy-to-use platform makes it simple to send and receive text messages.

Trigger thousands of messages in minutes. Integrate seamlessly. Only pay for what you need. Try Brevo's Messaging API for free — no credit card needed.

Engage your customers and prospects with simple drag and drop email, SMS, chatbot or build custom solutions with the best in class APIs

Engage your customers and prospects with simple drag and drop email, SMS, chatbot or build custom solutions with the best in class APIs

Textedly is an easy text message marketing (SMS) platform. Increase revenue and mass communication using automated, bulk texting services.

Plataforma de Comunicación Omnicanal. Crea una estrategia de comunicación global e integra todos tus canales de comunicación.

With many people opening your messages, boost customer engagement and satisfaction. Send promotional or transactional SMS.

Enterprise Communications Platform as a Service (CPaaS)

Vonage APIs (formerly Nexmo) offers communications APIs, a global platform and expert support—empowering you to create exceptional customer experiences.

Mailosaur removes the frustration of testing everything a user might do. 
Test password resets, replies, two-factor logins, and more.

Validate users across SMS and preferred channels at scale with the Twilio Verify API, a turnkey, passwordless authentication solution that enables seamless and secure user onboarding, reduces fraud, and optimizes delivery rates without the heavy lifting. Twilio handles all your connectivity, channels, OTP generation, and more—so you don’t have to.

Build your very own omnichannel customer engagement platform with a no-code builder or customize it with Video, Voice, SMS, and chatbot APIs from EnableX.

Everything you need for more successful email delivery and performance management, from simple sending tools to deeply informative reporting.

SMS texting service for business text messaging. Use our SMS software for business texting and SMS campaigns. Start texting online today with Text Request.

Unlock the power of your communications data. The Nylas communication APIs remove complexity & empower teams to create seamless user experiences.

Elastic Email is a marketing platform, built on the most cost-effective delivery engine. Join tens of thousands of companies, which already send their emails!

APIs Delivering Global Verification and Programmable Communications as a service. SMS, Voice, and phone number intelligence solutions. Get started now.

Send your Transactional and marketing Emails safely, track your results and use powerful APIs designed for devolopers by developers. Try for free

Textline's business texting software offers solutions for sales, marketing, customer service and beyond. Utilize the power of SMS to grow quickly.

An all-in-one online platform helps businesses send and receive SMS messages, make calls, and send and receive faxes globally.

Test new user signups, transactional emails, spam scores, and more. Get started on our free forever plan with unlimited email addresses and mailboxes.

SMS Marketing to Text from Computer to Customers or group members. Text message marketing & Free Trial w/100 msgs! Short code SMS 5 digit number software for groups & business texting. Blast bulk sms to customers from computer.

Simple, scalable and reliable. Hosted realtime APIs loved by developers and trusted by giants. Build live dashboards, notifications, geotracking, chat and more.

Kong is the most widely adopted API gateway and service mesh, powering the world’s APIs for modern architectures. Accelerate development and productivity today!

Niezawodne Email API i SMTP w chmurze. Najwyższa dostarczalność i szczegółowa analityka wiadomości email wysyłanych z Twojego systemu lub aplikacji.

With our free postal address verification and international address validation service you can easily verify if any USPS or international postal address is valid and deliverable.

Always-on text messaging platform for your business or organization. Send SMS & MMS and more. Contact us today.

Abstract provides powerful APIs to help you enrich any user experience or automate any workflow. Used by 10,000+ developers worldwide.

Telzio provides cloud-based phone systems with a modern interface and scalable pricing. Complete end-to-end solution with powerful call routing features.

Email delivery, perfected with Mailtinni! 💌 Your new SMTP service: fast, reliable, highly secure. 🚀

Advance your app's capabilities: Integrate LinkedIn and WhatsApp for streamlined messaging and improved user experience.

Discover AhaSend, the Email Service Provider dedicated to revolutionizing transactional emails. Enjoy hassle-free pricing at $0.50 per 1,000 emails and experience unmatched delivery times. No hidden fees, no brackets, just straightforward service designed for your peace of mind.

Experience seamless communication with MyOperator's call and WhatsApp API solutions. Run Campaigns, Deliver Customer Support, Build Engaging Workflows.

MailUp is your complete email and SMS delivery solution that combines powerful email marketing tools with SMTP relay and plugins for e-commerce, CRM, and CMS systems

Email API and SMTP relay to not just send and measure email sending, but also alert and optimise. We provide you with tools, expertise and support needed to reliably deliver emails to your customers inboxes on time, every time.

Bandwidth is an enterprise communications platform with voice, messaging, and emergency APIs for your communications stack.

SMTP email relay service that is powerful, secured and reliable. Send better transactional emails and integrate easily with our email API.

Send and receive fax online from anywhere by computer, mobile, or email. Best HIPAA-compliant online fax service for enterprises, SMEs, and individuals.

Boost your email deliverability and engagement with Inboxroad. Our comprehensive solutions and expert guidance ensure your messages reach the inbox - Inboxroad

Incoming Email for your Web Application, send and receive email via HTTP Post in the Cloud

Join 15,0000+ customers using Comm100's all-in-one omnichannel communication platform - live chat, bots, automation, email, and more!

Free and reliable screenshot api for website capture.

Stop bots and manual spam from reaching you or your customer. All with high accuracy and privacy.

Get your custom, branded URL Shortener up and running in minutes. Powering communications, commerce, marketing, advertising & more. URL Shortening API.

Discover the Best SMS Marketing Software Platform for your business. Increase customer engagement with our Text Message Marketing Software. Sign up for our free trial now.

eFax provides secure, scalable, enterprise-grade cloud faxing with HIPAA, HITRUST, and SOC compliance. Send and receive faxes from any device—computer, tablet, or smartphone.

Accept crypto payments for your business with Coinremitter, the world’s most affordable crypto payment gateway with just 0.23% crypto processing fees.

The business texting platform that drives pipeline creation and improves hiring and sales cycle conversion. Try our texting software today.

Meet Anypoint Platform, the only complete hybrid enterprise integration platform for SOA, SaaS and APIs. Anypoint Platform gives you the freedom to integrate what you want, when you want, whether its on-premises or in the cloud.

Set up email forwarding in seconds and start receiving and sending emails with your domain name. Absolutely free. No registration. 24/7 Support.

Power everything from live chat to data broadcast - reliably, securely, and at serious scale with Ably. The largest WebSocket-based pub/sub platform.

Improve your email deliverability with Bouncer's robust email verification and deliverability platform. 🌐

Need business text messaging? Heymarket's SMS messaging platform empowers teams to build personalized connections. ✓ Try business SMS today!

GoodAccess is a go-to cybersecurity platform for work-from-anywhere businesses. Hardware-free. Easy to use. Rapid to deploy. Free plan available.

Kong Gateway is the industry’s most trusted open source API gateway. Accelerate development and delivery of APIs and microservices with Kong Gateway today!

Easily unify the management, security, and governance of both synchronous and asynchronous ecosystems with the leading open source API Management platform.

Send encrypted email and attachments to any email address, without requiring clients to signup for a new account. Clients can send you secure messages and files with a simple link click.

Trumpia's automated texting software is built to automatically create personalized SMS interactions with your contacts. Our automated texting service is effective, affordable and easy to implement. Try Trumpia's text message automation software today with our free trial!

Infura's development suite provides instant, scalable API access to the Ethereum and IPFS networks. Connect your app to Ethereum and IPFS now, for free!

Boost your business revenue with engaging messaging powered by the Pushwoosh omnichannel customer engagement platform.

Choose Blueink for eSignature: 50% less cost than Docusign, HIPAA/GDPR compliant, signer-friendly and premium support. Discover quality and affordability today.

JangoSMTP - Transactional Emails Made Easy. Highest Inbox Results. Live US-Based Support. API and SMTP Relay Sending.

Power your real-time app with PubNub—the world's largest pub/sub network. Scale to 3 trillion API calls/month, with <30ms global delivery. Start building now!

Whether you need to attract new customers with your next hot promotion or reliably communicate with your existing customers, Mailrelay is your best choice.

Nevatech Sentinet offers a flexible, lightweight and scalable API Management platform to help businesses maximize the value of their data. Try Nevatech Now!

MTCaptcha: GDPR-compliant enterprise captcha service prioritizing accessibility and privacy. Offering advanced AI security, it serves as a cost-effective alternative to reCAPTCHA v2 and v3. Trusted by enterprises, small businesses, and startups alike for bot protection, prevention of human abuse, and fraud mitigation. As an independent captcha service, MTCaptcha is utilized by global enterprises. Hundreds of enterprises rely on MTCaptcha to safeguard their online services

2024 Consent Management Platform, cookies consent, privacy policy, cookies, policy, consent logs. Comply with global data privacy regulations

Streamline your emailing and boost your sales with Mailjet. We serve all your email and SMS needs with one simple and powerful service.

Connect with your people, have two-way conversations, follow-up with guests, survey your church, segment your ministries, and more.

Certifier is a digital credentials infrastructure. Easily make, share and verify digital certificates on autopilot. All-in-one platform for generation certificates and mass sending emails to recipients. Certificate maker with user friendly interface, ready-made templates, and delivery emails.