Telnyx

Pros: Before I found out about Telnyx I was trying Twilio, so it was really great that the Telnyx Twexit API is mostly compatible with codebases written for use with Twilio. The pricing isn't bad either.

Cons: Could be a pro depending on your perspective, but I wish Telnyx didn't go for the super personalized onboarding approach - as an introvert, I hesitated when I couldn't just spin up the docs and try it out via trial and error (you have to set up a call with telnyx engineers).

Overall: Tried Telnyx for a toy app during a hackathon and was really pleased by how well documented the messaging api is.

Pros: Telnyx has always been the most reliable of the phone providers we use. They are also the quickest to respond and solve problems.

Cons: At first the portal UI was hard to learn to use to use.

Overall: I have had an excellent experience working with Telnyx so far, better than with any other provider previously.

Pros: Prices are excellent and service offerings are fairly complete. Setup is easy and there are great tutorials for many systems.

Cons: There are some things missing like a fully functional SMS client. Need to use a 3rd party client or build own with the API.

Overall: Service has been for the most part set it and forget it. Support is sometimes slow to respond but responses are usually good.

Pros: The connectivity is exceptional.
We have deployed in both US and Europe.
Their customer service and tech support is amazing.

Cons: Their display portal for the web connectivity report is lacking.

Overall: Great Company, product service and tech support.
I would use their services any day and would recommend them to anyone.

Pros: Excellent and ease to use and good service recommended for business/

Cons: No cons.

Overall: I am happy with all features.

Pros: Multiple codec choices, including Opus. This is a big plus. Transport choices of UDP/TCP/TLS --- another big plus. SRTP support. Easy CNAM storage. Good SMS/MMS support with a very nice and thorough API. Good documentation. Good portal. Excellent call quality.

Cons: Few minor irritating things about the portal; nothing major (can't change certain settings on a connection profile if a DID is using it, etc.) DID prices could be better, and there are extra MRCs for things like enabling SMS support and such on a DID.

Overall: I have used Telnyx as one of my primary VoIP carriers for a good while now. I haven't had any issues of note. The service has been reliable. The minute prices are very good, especially outbound. Really, I have no notable complaints. I have contacted their support a few times for issues that usually ended up being on my end. I usually contacted support via the chat function and it was always handled reasonably quickly (and sometimes very quickly, within only a few minutes). I have recommended Telnyx to MANY people, and I have signed up several of my clients with their own accounts. All the people that I know of that have gone with Telnyx on my recommendation have been happy.
I have used Telnyx with Kazoo, Freeswitch, SipWise C5, Asterisk, and with single phones. Connection setup has never been an issue at all.
Although I use several carriers for various reasons, overall, I have no reservations about highly recommending Telnyx for nearly any VoIP use case, and see no reason why I will not be their customer for the forseeable future. :-)

Pros: So easy to use and a great value. Number partitioning is easy as is the API.

Cons: I had an issue porting a block of numbers but called support and they straightened me out in about 5 minutes.

Overall: Really easy to do self-service and easy to get help when that is needed too.

Pros: Setting up an IVR was easy even for me (not very technical).
Was able to use my existing number.
Their user-interface looks awesome and is simple to use.

Cons: I ran into a few problems, but their documentation had the exact guide to help me through.

Overall: Telnyx makes it super simple from start to finish. Going into this I never thought it was actually going to be that easy for me, but it literally only took me a couple hours to get everything setup, tested, and running. I’m more than excited that my Office Manager has a solid hour of time daily where she’s not routing calls the old fashioned way. Wish I would have discovered Telnyx sooner.