Best Communications Platform as a Service (CPaaS) for Slack

Find and compare the best Communications Platform as a Service (CPaaS) for Slack in 2025

Use the comparison tool below to compare the top Communications Platform as a Service (CPaaS) for Slack on the market. You can filter results by user reviews, pricing, features, platform, region, support options, integrations, and more.

  • 1
    Notifyre Reviews
    Top Pick

    Notifyre

    2¢/SMS part; 3¢/fax page (USD)
    39 Ratings
    See Software
    Learn More
    Elevate your business communications with Notifyre's secure SMS and fax solutions. Streamline SMS and faxing processes online, via email, app, or effortlessly integrate through our developer-friendly SMS and fax API. We're ISO 27001 certified and fully HIPAA compliant, giving you the utmost security for your faxes and SMS messages. Notifyre users from flexible pay-as-you-go fax & SMS and outstanding value receive fax plans and 10DLC number plans. 5 Star service guarantee! -Fax Online, Email to Fax, Fax API - Receive Fax Online -> Encrypted Cloud Storage -Online Fax Numbers -Fax Number Porting -Fax Broadcast 40,000+ Utilise the power of SMS messaging in your business, engaging with your audiences via SMS. Send SMS broadcasts or bulk SMS for marketing, promotions, surveys, support, alerts, or notifications all via a user-friendly secure online SMS portal. - 10DLC Virtual SMS Numbers -> Book a Demo for one-on-one guidance! - SMS Online, Email to SMS, SMS API - Mass Text Message Broadcast + SMS Marketing - Subscriber Management - Contact Management, Bulk Upload + Merge Fields + SMS Templates - Appointment Reminders, eCommerce Promo & Cart Reminders, SMS Alerts & Notification & More
  • 2
    Routee Reviews

    Routee

    AMD Telecom

    $0.01 one-time fee
    2 Ratings
    Routee is an intelligent omnichannel communication platform. (CPaaS), Routee offers advanced Web and API automation for all industry sectors. Routee's services are powered by AMD Telecom's strong infrastructure. They enable businesses to optimize marketing and business processes. -SMS Marketing: Custom-made messages based upon customers' individual preferences -Email Marketing: personalized newsletters and email campaigns based upon audience behavioral data -Transactional email: automated emails to customers regarding important data about their transactions -Marketing Automation: Rich forms & customer data capture. Automate repetitive marketing tasks and track marketing campaigns. -Two factor authentication: A second layer of security that includes fallback via SMS, Voice, Viber, and Missed Call -Cloud IVR: Multilingual capabilities, including the ability to convert speech into text and text to human-sounding text -Push Notifications: personalized web and mobile push notifications based on segmentation.
  • 3
    Twilio Reviews
    Top Pick

    Twilio

    Twilio

    $0.0085 per min
    12 Ratings
    Use the language you already love to prototype ideas quickly, develop production-ready communications applications, and run serverless applications on one API-powered platform. Twilio is a single fully-programmable platform with flexible APIs for any channel, built-in intelligence, and global infrastructure to support you at scale. Quickly integrate powerful APIs to start building solutions for SMS and WhatsApp messaging, voice, video, and email. Browse documentation and SDKs in multiple coding languages, including Ruby, Python, PHP, Node.js, java, and C#, or jumpstart your first project with our open source code templates to quickly build production-ready communications apps. Consult our community of over 9 million developers for guidance and inspiration on your next project. Sign up and start building today.
  • 4
    PubNub Reviews
    One Platform for Realtime Communication: A platform to build and operate real-time interactivity for web, mobile, AI/ML, IoT, and Edge computing applications Faster & Easier Deployments: SDK support for 50+ mobile, web, server, and IoT environments (PubNub & community supported) and more than 65 pre-built integrations with external and third-party APIs to give you the features you need regardless of programming language or tech stack. Scalability: The industry’s most scalable platform capable of supporting millions of concurrent users for rapid growth with low latency, high uptime, and without financial penalties.
  • 5
    IntelePeer Reviews
    IntelePeer’s Communications Automation Platform (CAP) offers a cloud-based solution tailored to streamline customer interactions and elevate user experiences. This platform integrates seamlessly with enterprise applications, enabling businesses to enhance efficiency, reduce operational costs, and automate communications across multiple channels like voice, SMS, and social messaging. Leveraging generative AI, CAP supports omnichannel communication and adapts to on-premises, cloud, or hybrid infrastructures, making it a flexible choice for modernizing organizational workflows. With robust enterprise-grade security and compliance features, IntelePeer ensures the protection of sensitive data while empowering organizations to optimize their communication strategies.
  • 6
    Connectly Reviews

    Connectly

    Connectly

    $80 per month
    Connectly is used by top-performing companies to increase their business performance. It promotes a 2-way conversation via WhatsApp with their customers. What about you? WhatsApp is the most popular communication channel, with a 95% engagement rate. This encourages conversation. The numbers speak for themselves. Connectly does the hard work so you don't have. If WhatsApp's API were easy to use, everyone would. Connectly's no code tool allows you to create simple interactive marketing campaigns using AI-powered bots. Connectly's WhatsApp marketing has a transformative effect. Two-way conversations are 5x more effective than one-way blasts. WhatsApp conversations can now be automated at scale. Connectly integrates with other stacks such as CRMs, Shopify and help desks. This allows you to deliver personalized service at scale. Our omnichannel products allow customers to choose their preferred channel. All messages will be consolidated in one place.
  • 7
    Vonage Communications APIs (Nexmo) Reviews
    Conversations are the best way to create customer journeys. Engaging experiences that move customers. Developers love it. Built for business. Vonage Communications APIs (formerly Nexmo), help growing startups and agile businesses improve their customer experience and realize new business results at scale. Our APIs, global platform and expert support make it easy to simplify communications and innovate faster. Voice interactions can be reimagined to transform customer experiences. Every message should be viewed as an opportunity for you and your customers. Secure and private logins are made easier with this tool. Cloud-based voice applications that are modern and high-quality. You can programatically send and get SMS from almost every country. Get real-time information on any phone number around the globe. You can make and receive calls using your existing VoIP infrastructure.
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