UniStack's algorithms protect your phone numbers from getting blocked and maximize text messaging conversion.
Cost / License
- Paid
- Proprietary
Application typeApplication types
Platforms
- Online
Twilio Alternatives
Twilio is described as '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' and is an website in the social & communications category. There are more than 100 alternatives to Twilio, not only websites but also apps for a variety of platforms, including SaaS, Android, iPhone and Windows apps. The best Twilio alternative is UniStack. It's not free, so if you're looking for a free alternative, you could try Vendel or Sherlock Calls. Other great sites and apps similar to Twilio are Telnyx, Dexatel, Teliqon and Smarter Contact.
Alternatives list
- 39 UniStack alternatives
All-in-one cloud communications platform and API with carrier-grade voice, data and messaging capabilities. Offers voice services such as Origination, Termination and SIP trunking over the Internet.
Cost / License
- Paid
- Proprietary
Platforms
- Online
United States
Dexatel is an API-first, AI-powered CPaaS platform that enables enterprises to deliver secure, scalable, and cost-efficient messaging across SMS, WhatsApp, Viber, RCS, Telegram, and Voice—ideal for OTP, customer engagement, and mission-critical communications.
Cost / License
- Paid
- Proprietary
Platforms
- Software as a Service (SaaS)
Estonia
EU
+1
Teliqon is a Global Cloud Communications Platform combining Cloud PBX, UCaaS, CPaaS, business messaging, virtual phone numbers, and contact center solutions in one system.
Cost / License
- Paid
- Proprietary
Application type
Platforms
- Online
- Software as a Service (SaaS)
- Estonia
- EU
+1
Vendel is a full-stack platform for SMS management and delivery through connected devices. It allows sending SMS messages using registered devices (Android phones or modems) as gateways, with quota management, webhooks, and multi-user support.
Cost / License
- Freemium
- Open Source (MIT)
Platforms
- Online
- Software as a Service (SaaS)
- Self-Hosted
- Docker
Cuba
37 Smarter Contact alternativesSmarter 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
Sherlock Calls investigates failed voice AI calls and posts the findings in Slack: a correlated cross-provider timeline, root cause with evidence, and first checks in triage order — giving voice AI observability to telephony engineers and on-call SREs without new dashboards.
Cost / License
- Freemium
- Proprietary
Platforms
- Slack
Spain- EU
Message1.io is a cloud-based software solution designed to organize and manage telephone answering and virtual secretarial services for businesses. It is not a traditional call answering service itself, but rather a platform that enables service providers to operate and...
Cost / License
- Paid
- Proprietary
Application type
Platforms
- Software as a Service (SaaS)
- Online
Switzerland
Lead Sherpa is a cloud-based marketing campaign management solution that enables organizations to create, run and manage personalized marketing campaigns.
Cost / License
- Paid
- Proprietary
Application typeApplication types
Platforms
- Online
- iPhone
+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
United Kingdom
+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
78 SMSAPI alternativesSMSAPI.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
Czechia- EU
