if the inbound SMS are sales rep specific you could potentially have twilio fwd that msg to a google voice phone number which will in turn put an email in their inbox (so they're looking at 1 inbox instead of multiple places) Just an idea. Probably way off in left field compared to what you're thinking and I also invision. I'm not all familiar with MessageBird nor am I at all familiar w/ your data flow / business process. Would be happy to help brainstorm anytime! 10+ years experience on the sfdc platform

Check out Centro. We built this to solve this exact problem! We used tools like Twilio but wrapped it up in a application that runs on Slack.

Twilio documentation is very good and as a platform it just works. It's robust and reliable. We road-tested plivo and it wasn't anywhere near in terms of docs or support. In fact their support was terrible at replying to us. 48 hours to answer basic questions.

That's said, were also using sendgrid by twilio and that's not been pleasant . Their email builder appears to be react based but written by a team who don't understand react very well. That's a nightmare as yet

Twilio is the leader. Strong API, excellent documentation and reliable service. I suggest Nexmo since their API has smaller learning curve, offering better prices and also reliable solution. Also Nexmo offers more call per sec. 3 vs 2 and 2, out of the box. Good luck

Twilio might be not cheapest, but they have awesome documentation (a lot of examples), easy to use API and libraries. I think it's a very good product to start. If the bill will become too heavy, you can shop around for economical options.

stackshare doesn't seem to have this in the stack list yet, but in my experience Twillio is attractive. It's good for basics, their acquisition of SendGrid gives them a bit more market share.. They are stronger at marketing to those that benefit them. That said from my understanding SendGrid leases the networks, channels, and lines. While their interface is friendly, their pricing suited for lower volume, you want to look at what they are using via an API, a contract, etc. Is it a more friend UI to a combination of others. What redunancies do to they have, try their support. It's not that Twillio is bad, it's about the volume, the use case, the liabiitlies you might have to your end-users if Twillio isn't the right choice. Another option is Bandwidth. You ask for affordable, Twillio is an option, but front end costs v/s the costs of support you'll need to consider. Bandwidth has more reliability but requires more engineering and more skillset. Another option that is worth considering, not the most affordable, but https://www.zipwhip.com/ have perhaps options that might be higher and the cost is relative. Wight costs, of support costs of integration, cost of scale, costs of a volume..

The only transactional email service that I've been able to stomach is Postmark! It is by far the easiest (and quickest to get feedback from) service that I have come across. While drowning in attempts to debug Mandril, Mailgun and others I get quick feedback from Postmark in what I need to do.

Postmark for the win!

If you need your emails to be sent in a time-sensitive manner, I'd recommend SendGrid. We were using Mailgun and the lag because they aren't "transactional" in nature caused issues for us. SendGrid also has the ability to do dynamic templates and bulk send from their API. I don't know that they have the shared layout ability you mentioned, though.

We are using more extensively Mandrill.

It is a ok tool, which gives you the power for emailing with nice set of features.

The templates editing and management is a bit tricky, but this is mostly related to email templates in general, which are hard to create and maintain.

I do not think you can share the parts of the templates. You can have your predefined templates with possibility to insert dynamic content.

They provide a limited possibility to preview and test your templates.

The template editor is text only. For the better editors checkout http://topol.io or https://mosaico.io

Unfortunately, I do not have experience with the other tools and possibilities to manage templates.

At this stage, all of the tools you mentioned do email delivery pretty well. They all support email templates as well. Here are some considerations:

1. Twilio owns SendGrid. If you're an existing Twilio customer, in my opinion that's a good reason to use SendGrid over the other solutions. The APIs are solid, and Twilio has excellent developer tools that allow you to create interesting automations (which is important for scaling).
2. Mandrill was created by MailChimp, who have massive experience with email delivery and specifically with emailing beautiful email templates.
3. Mailgun is a tool on its own. Like the other two, it supports mail templates and is built to be controlled almost exclusively via APIs.

SendGrid and Mandrill have pretty nice WYSIWIG template editors as part of their platform. Not so sure about Mailgun.

So for me the considerations would be: 1. How easy is it for you to integrate with their API? How complete is their API in terms of your own specific needs? 2. Prices: Which one works best for my budget? 3. Am I OK with editing the templates elsewhere (or even by hand), and then pasting the code into Mailgun? Or do I want the comfort of Mandrill or Sendgrid with their WYSIWYG editors?

Personally I'd go with Twilio, simply because it's such a massive ecosystem they are less likely to go bankrupt, and their APIs are rock solid.