Customer IO
Automate powerful behavioral messages for web & mobile apps
Shoutout
Turn your free users into your growth engine
Updated June 2026
| Customer IO | Shoutout | |
|---|---|---|
| Rating | 4.6★ | 5.0★ |
| Reviews | 24 | 2 |
| Pros | 10 | 0 |
| FactScore™ | 64.7 | 23.9 |
FactScore™ Comparison
FactScore™ weighs both quality (rating) and popularity (reviews) for a fairer ranking than stars alone.
Pros & Cons
Only in Customer IO — Pros
Behavioral messaging Personalized communication Automation capabilities Free startup plan Segmentation User engagement Customer support Email builder Multi-channel messaging Workflow customizationBoth tools — Pros
—Only in Shoutout — Pros
No unique pros listedOnly in Customer IO — Cons
Complex interface Email editor issues Inflexible journeys Limited CMS features Slow UIBoth tools — Cons
—Only in Shoutout — Cons
—Details
| Customer IO | Shoutout | |
|---|---|---|
| Categories | Email marketing, Marketing automation platforms, Customer loyalty platforms | Affiliate marketing, Influencer marketing platforms, Customer loyalty platforms |
| Platforms | Web | Web |
| Added | January 29, 2014 | July 1, 2024 |
| Website | customer.io | shout-out.co |
Who Should Pick Which?
Choose Customer IO if...
- Behavioral messaging
- Personalized communication
- Automation capabilities
Choose Shoutout if...
- No unique pros listed
With a FactScore™ of 64.7 vs 23.9, Customer IO leads in community reception. Customer IO uniquely offers Behavioral messaging and Personalized communication, while Shoutout stands out for No unique pros listed.
What Users Say
Customer IO
We made the switch to Customer.io after trying out Loops and Userlist, and it’s been a great decision. It’s powerful enough to handle all our SaaS communication needs, yet still easy to use. It wor...
Our new email campaign provider with a user-friendly interface, clear visual logic for campaign triggers, and lots of customization. The level of flexibility has encouraged us to be more creative a...
Customer IO stands out for its powerful automation capabilities and behavioral messaging tools. It allows us to create highly personalized communication workflows, improving engagement and retentio...
Shoutout
Shoutout’s growth automation platform is a game-changer! Offering rewards like discounts and cash credits to incentivize customer actions makes scaling effortless. Excited to see how this can super...
We use Shoutout as one of the products for our user growth. This has been a game changer for us to drive initial traction for Letz DM.
Related Comparisons
Frequently Asked Questions
Which is better, Customer IO or Shoutout?
Based on FactScore™, Customer IO leads with a score of 64.7 vs 23.9. Customer IO has a higher rating of 4.6★ compared to 5.0★.
What are the pros of Customer IO compared to Shoutout?
Customer IO uniquely offers: Behavioral messaging, Personalized communication, Automation capabilities, Free startup plan, Segmentation.
What are the pros of Shoutout compared to Customer IO?
Shoutout uniquely offers: No unique pros listed.
Is Customer IO better rated than Shoutout?
Customer IO is rated 4.6★ from 24 reviews. Shoutout is rated 5.0★ from 2 reviews.
What is the FactScore™ of Customer IO and Shoutout?
FactScore™ weighs rating and review volume together. Customer IO scores 64.7 and Shoutout scores 23.9.
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