UniStack's algorithms protect your phone numbers from getting blocked and maximize text messaging conversion.
Authkey - SMS & WhatsApp API Alternatives
Authkey - SMS & WhatsApp API is described as 'Authkey is a versatile multiple channels platform, including SMS API, WhatsApp Business API, Email, Voice Call APIs, and various authentication methods such as OTP, 2FA, and more' and is an website in the office & productivity category. There are more than 50 alternatives to Authkey - SMS & WhatsApp API, not only websites but also apps for a variety of platforms, including SaaS, Android, iPhone and Windows apps. The best Authkey - SMS & WhatsApp API alternative is UniStack. It's not free, so if you're looking for a free alternative, you could try Wazo or Fonoster. Other great sites and apps similar to Authkey - SMS & WhatsApp API are Smarter Contact, Twilio, Lead Sherpa and Textmagic.
Alternatives list
Smarter Contact is an SMS Marketing Software that is undisputedly the market leader in skiptracing (number lookup) using the most advanced geolocation data. The highest hit rates ensure that you're getting in touch with your customers.
Cost / License
- Paid
- Proprietary
Platforms
- Online
- Android
- iPhone
123 Twilio alternativesTwilio is a web-service API that lets you use your existing web languages and skills to build voice and SMS applications. We focus on building a simple, powerful, pay-as-you-go communications platform so that you can focus on what you do best.
Cost / License
- Paid
- Proprietary
Platforms
- Online
Lead Sherpa is a cloud-based marketing campaign management solution that enables organizations to create, run and manage personalized marketing campaigns.
+1
Cloud-based SMS messaging service provides bulk text notifications, alerts, and campaigns. Features 2-way chat, contact management, API, mobile keywords, polling, analytics, toll-free and scheduled messaging, flexible pricing, and virtual numbers.
Cost / License
- Paid
- Proprietary
Platforms
- Mac
- Windows
- Online
- Android
- iPhone
+6
Wazo is mainly an IPBX that provides communication services such audio, video, and instant messaging based on the use of standard network technologies such as the TCP/IP protocol. It is interoperable with most market telephony systems and gives users access to flexible and...
Cost / License
- Free
- Open Source
Platforms
- Mac
- Windows
- Linux
- Self-Hosted
SMSAPI.com is browser platform for bulk SMS and other SMS marketing solutions. SMSAPI offers bulk SMS, MMS, voicemailing, HLR services, shortcode, SMS notifications, newsletter SMS, MMS coupons, mail2SMS, two-way SMS and other mobile services.
Cost / License
- Paid
- Proprietary
Platforms
- Online
- Software as a Service (SaaS)
- iPhone
- iPad
- Android
- Android Tablet
Web CRM solution using the WhatsApp Business API to automate sales, marketing, and support workflows, featuring a shared inbox, no-code chatbot builder, campaign broadcasting, third-party integrations, analytics, and secure team access controls.
Cost / License
- Paid
- Proprietary
Platforms
- Online
- Android
- iPhone
- Android Tablet
- iPad
- Software as a Service (SaaS)
+4
Atomic SMS Sender supports 800 networks worldwide, enabling mass text ads, alerts, and notifications. Offers competitive pricing, dynamic sender IDs, free SMS testing, API integration, and a desktop or browser interface for seamless campaigns and delivery monitoring.
Cost / License
- Free
- Proprietary
Platforms
- Windows
+1
AiSensy is a complete WhatsApp Engagement Platform based on official WhatsApp APIs. Solution for WhatsApp marketing, Sales & customer support. Powered with AI, this platform helps you to broadcast & automate WhatsApp messages for unlimited users.
Cost / License
- Paid
- Proprietary
Platforms
- Online
- Software as a Service (SaaS)
Platform for WhatsApp API that allows you Profile leads, automate follow-ups and integrate with your favorite tools to increase conversion.
Cost / License
- Paid
- Proprietary
Platforms
- Online
- Android
- iPhone
- Android Tablet
- iPad
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