Customer.io vs. Vonage Communications APIs

Talking from the perspective of a marketer at a SaaS with average. 50K email subscribers, Customer IO has been an excellent tool for us. Our requirements include sending users newsletters, marketing emails, and transactional emails, running lead-nurturing campaigns, and more. For a comprehensive use case like ours, CustomerIO is great. While it also has a learning curve, when you have such requirements, it’s worth it. I don’t think CustomerIO is the best fit if you have basic requirements like only weekly newsletter emails.

Incentivized

While there are likely a variety of scenarios that would work well with Vonage [Communications APIs (formerly Nexmo)], implementations that need transactional message and response actions are a great fit. Our experience with transactional messaging has been really good and we are continuing to look at opportunities to expand our usage of this part of their service.

• Managing users, attributes and events. You are easily able to modify any user, based on their ID, and add or remove attributes, assign events to them. That makes it very easy to segment later and to assign them to several campaigns based on behavior. Just a warning: this integration isn't so easy (at least it wasn't for us).
• Creating workflows of campaigns is very easy. You can quickly create behavioral campaigns based on attributes, segments and add elements to the workflow. You can send an email, then wait, then send another, then exit the campaign if they converted, etc. The workflow is easy to configure and very powerful for automation.
• We don't use many email templates (we make them in MJML) but it's very easy to add senders, to change templates and in general to test designs.
• Deliverability works very well, at least for us. It sends emails pretty fast and without issues.
• Exporting is very quick and easy. Importing wasn't a feature until recently, but it works well too.
• Seeing activity it's also useful. In general, logs are awesome (be it of a customer, of activity on the site, email sends, etc.).
• We don't use environments, but it might be very useful for a bigger company.

Incentivized

• I like the delivery speed, it's very instantaneous. As soon as the delivery status changes on the website, the message gets delivered. The rates are also cheap and affordable.
• The accuracy of the services and the non-stop supportive team.
• Simple API, easy to integrate with existing notification functionality in your Laravel apps.
• Ease of implementation. We needed less than one month to go live.

Incentivized

• Price is quite expensive for Premium or once you get into high volumes of contacts.
• Depending on how you'll use it, it may require some help from developers to set up.
• Despite the support being great, you have to email them, there's not chat feature.

• Written documentation and discovery could be a lot better.

Everything was pretty intuitive to use if you've used an ESP before. The only thing that was confusing is Campaigns vs Newsletters - some of their naming conventions aren't straightforward. But their docs, support and AI agents are all super solid.

Incentivized

The overall usability of Vonage [Communications APIs (formerly Nexmo)] system for message delivery is sufficient for our implementation. Some improvements and additional reporting options in the account administration interface would increase our utilization of the post-delivery data further in order to provide further value-added features for our clients.

My experience with their support team has always been great. Very quick to respond, have an online chat, and are very helpful. They helped me resolve any issues I've had every time in a professional and knowledgeable manner. We've now switched to another tool, and I can't even compare the service level we get there to customer.io

Incentivized

The product feels a bit like a black box since it's built to be an off-the-shelf solution so sometimes it feels like the only way to really understand it is to talk to an engineer directly as the documentation is so-so.

Customer.io was really the first pure, full-featured drip email program on the market and as far as I know, it's still the simplest and best overall for that specific function. SendGrid has also added drip campaign features, but I would seriously evaluate Customer.io against any other drip email provider because they really have all the key elements you need to make it work.

Incentivized

Nexmo is the best platform in the industry for sure. We don't use all the features that the API provides but we are really satisfied with the ones we use. We are sure this is the best solution in the market if you need to solve the communication in real time with your customers. When we have to build a new website we are going to support the solution with Nexmo.

Incentivized

• Positive impact on the sales side. I'm not sure about the specific ROI (you have to include the designer and the time it takes to set up) but you certainly get back the investment in a few months, once you are able to scale your email marketing.
• Customer experience is way better by having more segmented, contextual and accurate messages sent to them.
• Integration is costly and it will take several days or weeks to be fully achieved. Expect to invest some money on this.

Incentivized

• Allowed us to go to market faster (positive).
• Greatly limits our claim to quality as the ceiling on video quality is lower than other platforms (negative).