Best CPaaS system for mobile development?

I'm exploring the best CPaaS (Communications Platform as a Service) solutions for mobile development. I’m looking for tools that offer APIs, SDKs, and features like voice, video, chat, and authentication to help build rich mobile communication experiences.

Here are some top-rated CPaaS platforms for mobile development I've come across:

• Twilio: A popular choice among developers, Twilio offers APIs for voice, SMS, video, and two-factor authentication. It's flexible, scalable, and comes with great documentation to help speed up development.
• Infobip: Infobip supports messaging, voice, email, and chat across many global carriers. It’s a solid option if your app serves users in multiple countries and needs reliable delivery.
• Sinch: Sinch is great for real-time communication features like video calls and voice messaging. It’s built to scale and works well for apps that need secure, fast, and global communication.
• Vonage Communications APIs: This platform makes it easy to add voice, video, and messaging into your mobile app. The setup is straightforward, and the tools are designed with developers in mind.
• MirrorFly: MirrorFly offers voice, video, and chat APIs with both cloud and self-hosted options. It’s great if you want more control over the communication experience in your app.

I found these while browsing G2’s CPaaS software category. If you’ve worked with any of these, I’d love to hear how well they integrated into your mobile stack and how the support experience was.