OneSignal vs Stamped: Complete Comparison (2026)
An in-depth comparison of OneSignal and Stamped to help you choose the right tool for your business.
Last updated: November 2026
OneSignal
7.1/10
OneSignal is a customer messaging platform for sending mobile push, web push, in-app messages, email and SMS to app and website users.
Stamped
6.3/10
Stamped is a product reviews, user-generated content, and loyalty platform that helps Shopify and other ecommerce brands gather social proof and drive repeat purchases.
Feature-by-Feature Comparison
| Feature | | |
|---|---|---|
| Scores | ||
| Overall Rating | 7.1/10 | 6.3/10 |
| Analytics | 6/10 | 5/10 |
| Cost | 7/10 | 6/10 |
| Customization | 6/10 | 7/10 |
| Ease of Use | 8/10 | 6/10 |
| Integration | 8/10 | 7/10 |
| Scalability | 8/10 | 6/10 |
| Security | 7/10 | 5/10 |
| Support | 6/10 | 7/10 |
| Pricing | ||
| Free plan | Yes | No |
| Cheapest paid plan | $19/mo Growth | $23/mo Reviews 200 orders (Shopify) |
| Estimated cost for 10 users | Free Free | $23/mo Reviews 200 orders (Shopify) |
| Features | ||
| A/B Testing | Not listed | |
| E-commerce Features | Not listed | |
| Email Marketing | Not listed | |
| Segmentation | Not listed | |
| SMS Marketing | Not listed | |
OneSignal vs Stamped cost by team size
OneSignal costs less at every team size we checked.
| Team size | OneSignal | Stamped |
|---|---|---|
| 1 user | FreeFree | $23/moReviews 200 orders (Shopify) |
| 5 users | FreeFree | $23/moReviews 200 orders (Shopify) |
| 10 users | FreeFree | $23/moReviews 200 orders (Shopify) |
| 25 users | FreeFree | $23/moReviews 200 orders (Shopify) |
| 50 users | FreeFree | $23/moReviews 200 orders (Shopify) |
The plan that fits each team size, billed monthly, before add-ons and usage charges. Each cost opens that tool's pricing calculator for the team size.
Which One Should You Choose?
Why choose OneSignal
- Has a free plan (Stamped does not)
- Lower estimated cost for 10 users: Free vs $23/mo
- Higher Ease of Use score (8/10 vs 6/10)
- Higher Scalability score (8/10 vs 6/10)
- Better fit for enterprise (7/10 vs 5/10)
Why choose Stamped
- Higher Customization score (7/10 vs 6/10)
- Higher Support score (7/10 vs 6/10)
- Better fit for e-commerce (10/10 vs 5/10)
Pros & Cons
OneSignal
Pros
- A free plan with unlimited push up to 1,000 MAU and 10,000 emails a month makes it cheap to start.
- Push, in-app, email and SMS run from one platform with cross-channel journeys.
- Reviewers on G2 and PeerSpot say the dashboard is easy for non-technical marketers to use.
- A broad integration catalog covers CDPs such as Segment, RudderStack and Hightouch, data warehouses, and analytics tools.
Cons
- PeerSpot reviewers call it expensive for large subscriber bases.
- Free and Growth plans cap segments at 6 and 10, and reporting history at 30 and 90 days.
- SMS pricing is not published and requires a sales conversation.
- Reviewers mention unclear documentation for advanced cases and limited in-app design options.
Stamped
Pros
- Rated 4.7 stars from about 3,700 reviews on the Shopify App Store, and 91 percent of those ratings are five stars.
- Review submissions can automatically award loyalty points, which links the reviews and loyalty programs.
- Reviews can be syndicated to Google Shopping, Meta, and the Shop App.
- Integrates with Klaviyo, Attentive, Omnisend, Gorgias, and Shopify Flow.
- Many merchants praise hands-on support and the free review migration.
Cons
- Merchants report slow or missing widgets, a backend that fails to load, and settings that reset.
- Some users report billing disputes, including charges after uninstalling, because billing can run outside Shopify.
- Prices on Stamped's site, which start at 199 dollars per month per product, are much higher than the entry Shopify listing, and pricing depends on order volume.
- Stamped does not run full email or SMS campaigns, so brands need a separate tool such as Klaviyo.
- Reviews and loyalty have historically been separate apps, which some users find confusing to set up.
Not sold on either?
Frequently Asked Questions
OneSignal scores higher on our Marketing criteria: 7.1/10 against 6.3/10 for Stamped. The largest gap is in Ease of Use: 8/10 for OneSignal and 6/10 for Stamped.
OneSignal costs less for 10 users: free on its Free plan, against about $23/mo on its Reviews 200 orders (Shopify) plan for Stamped, billed monthly.
OneSignal has a free plan; Stamped does not list one.
Stamped is the better fit for e-commerce: we rate it 10/10 for them, against 5/10 for OneSignal.
