Customer.io is a customer engagement platform that enables marketers to build sophisticated automated messaging campaigns. With access to real-time behavioral data, users can create personalized and relevant messages to engage and retain customers. This includes sending emails, push notifications, SMS, in-app messages, and more through a visual building experience. Built for scale, Customer.io boasts users among over 5,300 companies, sending over 17 billion messages per year.
$100
per month
SparkPost (discontinued)
Score 2.9 out of 10
N/A
SparkPost offered real-time analysis of email delivery and customer engagement as well as personalized email templates. The service has been discontinued.
$30
per month
Pricing
Customer.io
SparkPost (discontinued)
Editions & Modules
No answers on this topic
Starter
$30
per month
Premier
$75
per month
Enterprise
Contact sales team
Offerings
Pricing Offerings
Customer.io
SparkPost (discontinued)
Free Trial
Yes
No
Free/Freemium Version
No
No
Premium Consulting/Integration Services
Yes
No
Entry-level Setup Fee
Optional
No setup fee
Additional Details
Essentials: For startups and small teams engaging customers on their mobile and web apps.
- Up to 5,000 profiles*, Send Emails, Push, In-App, and SMS, Visual Workflow Builder, Segmentation, Two Workspaces, Email Support, Customer Community
Premium: For high-growth companies looking for greater control over their messaging outcomes.
- Everything in Essentials, Custom Data + Message Volume, Premium Product Features, Additional Workspaces, 90-day Onboarding Program, Premium Email & Chat Support, Managed Deliverability, Dedicated IPs, Parcel Pro Licenses, HIPAA Compliance
Enterprise: For at-scale companies looking to create world-class customer experiences.
- Everything in Premium, Managed Infrastructure*, Customer Success Manager, Quarterly Success Reviews, Technical Account Manager*, Audit Logging & Data Governance*, Parcel Business Licenses, Migration Support*, *Available by consultation.
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.
Our early experiences with SparkPost were great; we were looking for a low-cost (or no-cost) solution to our email messaging needs, and SparkPost had the best low-cost option: 100,000 messages per month for free, guaranteed for life. Even though our team has experience with other APIs, we chose SparkPost because it felt like the best value. Our experience with it was great. Two years ago, they discontinued their free option but sent the existing users the following message: "When you signed up, we promised that if we ever changed the terms of our 100K free plan, we would continue to honor the original plan for the life of the account. I would like to reaffirm this promise: while this plan is no longer available to new customers, you are grandfathered into this level of free sending volume." The following year, apparently following a change in leadership, they decided to "deprecate" existing free plans, dropping us down from 100,000 messages per month to 500, the lowest of any email API service I'm aware of. No recognition of the broken promise, the reneged guarantee, just a 20% off coupon. This atrocious behavior that reeks of a new culture of squeezing as much money as possible out of its users and has coincided with a steady deterioration of functionality and customer service. At this point, I have no idea why anyone would pay more for a worse service that treats its users so poorly when you could use SendGrid or a similar competitor for a lower price and way more features.
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.
When I first implemented SparkPost, I did not take advantage of the sub-account feature, and my account was suspended on New Year's Eve. It took two days until I could speak with a support representative to get my account re-activated. I am now using sub-accounts to alleviate the underlying problem, but I was disappointed that my account was suspended by an automated system with no notice.
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.
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
Would give it a zero if I could. Their customer service used to be incredible; fast response times, really hands-on with their users, and a pretty regular feedback process. They sent me an awesome t-shirt that became part of my go-to climbing gear. But for the past year, their response times went way down, their customer service was less helpful and generally a lot more rude, and they haven't asked for customer input once since their leadership change
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.
Mailchimp and sendgrid are giving good services and good customer support 24/7 and ROI is increased with this as transition is very smooth. SparkPost is very expensive and not good as much as we think and they will least worried about your mails, tickets, call and messages. Highly not recommended this SparkPost to any one
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.
