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OneSignal vs WSO2 API Manager comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Nov 16, 2025

Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

ROI

Sentiment score
7.1
OneSignal enhanced ROI by growing subscribers, boosting sales, cutting acquisition costs, increasing engagement, and improving marketing efficiency.
Sentiment score
7.7
WSO2 API Manager offers cost-effective, flexible, and robust open-source solutions, enhancing operational efficiency with excellent support and integration.
OneSignal has reduced the customer acquisition cost by 40 percent and increased the conversion rate to 27 percent.
Software Engineer at Medtronic
We have seen it being very cost-effective because it is affordable while increasing user engagement and our brand awareness.
Dotnet Developer at AT&T
We are able to send our news and offers instantly to our clients and subscribers, which drives more traffic to our website and increases our sales engagement and sales campaigns.
Marketing Director at UPS
Since you can scale it and maintain your work, it is effective.
Manager, Integration Technical Delivery at United Delta
 

Customer Service

Sentiment score
8.3
OneSignal's highly rated customer service offers 24/7 fast, helpful assistance, resolving issues efficiently within a few business days.
Sentiment score
6.6
WSO2 API Manager's support praised for enterprise users, but open-source users report mixed experiences with accessibility and response times.
Their customer support has been excellent, as they are able to assist with any problem that arises and respond in a very timely manner.
Account Manager at Samsung
They are lightning-fast to respond to our queries and are solution-oriented.
Marketing Director at UPS
The customer support has been very responsive, proactive, and solution-oriented.
Dotnet Developer at AT&T
I believe the support is a significant strength for WSO2.
Manager, Integration Technical Delivery at United Delta
The support is good, with well-defined documentation and helpful blogs.
Senior Principal Architect at a computer software company with 501-1,000 employees
 

Scalability Issues

Sentiment score
7.5
OneSignal offers high scalability, efficiently supporting diverse organizational sizes, though some uncertainty exists in large-scale scenarios.
Sentiment score
7.5
WSO2 API Manager's scalability varies, influenced by deployment strategy and version, with benefits in Docker and Kubernetes environments.
OneSignal is highly scalable and grows with my organization’s needs, being able to handle large data.
Marketing Director at UPS
OneSignal's scalability grows with the needs of my organization, so it is very scalable and expands with the growth of my organization and needs.
Data Analyst at United Home Health and Behavioral Services
For the cases I have experienced, WSO2 API Manager is easy to scale.
Manager, Integration Technical Delivery at United Delta
 

Stability Issues

Sentiment score
8.6
Users praise OneSignal's stability and reliability, noting excellent performance with no downtime, but scaling remains untested.
Sentiment score
7.3
WSO2 API Manager is stable, but can have memory issues; users recommend proper architecture and open-source versions may need updates.
In my experience, OneSignal is very stable, with no downtime or lagging, and I have noticed no issues.
Customer Service Specialist at KPMG USA
I have not noticed any downtime, and it has performed well so far.
Software Engineer at Medtronic
OneSignal is very stable; I have not experienced any lagging or downtime.
Dotnet Developer at AT&T
I do not face any issues regarding API security from OAuth 2 based authentication. It is secured and well-secured, and I have not faced any security-related issues.
Manager, Integration Technical Delivery at United Delta
The system is stable for our low-concurrency use cases.
Senior Principal Architect at a computer software company with 501-1,000 employees
 

Room For Improvement

OneSignal users seek enhanced features, customization, better pricing, improved support, and advanced analytics for superior in-app experiences.
WSO2 API Manager needs interface modernization, clearer documentation, better integration, security improvements, enhanced support, and improved pricing strategy.
We have to do separate notifications for the app and website, which is time-consuming.
Customer Service Specialist at KPMG USA
OneSignal can be improved by addressing the expensive pricing of $309 per month for approximately 100,000 subscribers.
Account Manager at Samsung
An inbuilt and easy-to-use segmentation should also be included.
Software Engineer at Medtronic
Our integrations do not handle high-volume transactions.
Senior Principal Architect at a computer software company with 501-1,000 employees
WSO2 released other products that solved everything related to my concern.
Manager, Integration Technical Delivery at United Delta
 

Setup Cost

OneSignal offers cost-effective pricing and support, ensuring a budget-friendly, high-quality solution appealing to enterprise users.
WSO2 API Manager is free open-source, but enterprise support requires a costly subscription based on feature needs and deployment size.
OneSignal is one of the most cost-effective tools available and is very affordable in terms of pricing, setup cost, and licensing.
Software Engineer at Medtronic
The licensing is very cost-effective, making its affordability very high.
Digital Marketing Manager at Unilever
the cost is very effective compared to other mediums
Customer Service Specialist at KPMG USA
 

Valuable Features

OneSignal offers reliable, high-performance notifications and messaging with easy integration, enhancing engagement, retention, and brand awareness.
WSO2 API Manager excels in flexibility, scalability, integration, with user-friendly UI and security, enhancing microservices and API management.
OneSignal has positively impacted my organization with increased sales attributed to it, a higher number of monthly visitors, increased customer loyalty, and it keeps users coming back, supporting customer retention.
Customer Service Specialist at KPMG USA
The segmentation feature makes the biggest difference for my team, as it is very effective in allowing easy targeting based on various criteria such as geographical area, engagement levels, and specific transactions.
Software Engineer at Medtronic
OneSignal offers the best features, including sending instant notifications without delay, providing all necessary features for testing, being highly cost-effective, handling huge volume efficiently, and providing great customer support.
Marketing Director at UPS
The product's capabilities for integrating with REST APIs are valuable.
Senior Principal Architect at a computer software company with 501-1,000 employees
The Lifecycle Management feature helps me manage my APIs when I'm using it.
Manager, Integration Technical Delivery at United Delta
 

Categories and Ranking

OneSignal
Average Rating
8.6
Reviews Sentiment
7.1
Number of Reviews
10
Ranking in other categories
CRM (8th)
WSO2 API Manager
Average Rating
8.0
Reviews Sentiment
6.9
Number of Reviews
42
Ranking in other categories
API Management (11th)
 

Mindshare comparison

OneSignal and WSO2 API Manager aren’t in the same category and serve different purposes. OneSignal is designed for CRM and holds a mindshare of 0.4%.
WSO2 API Manager, on the other hand, focuses on API Management, holds 3.1% mindshare, down 4.8% since last year.
CRM Mindshare Distribution
ProductMindshare (%)
OneSignal0.4%
Microsoft Dynamics CRM2.8%
Salesforce Sales Cloud2.4%
Other94.4%
CRM
API Management Mindshare Distribution
ProductMindshare (%)
WSO2 API Manager3.1%
Microsoft Azure API Management11.1%
Amazon API Gateway8.3%
Other77.5%
API Management
 

Featured Reviews

Lowawot Alice - PeerSpot reviewer
Marketing Director at UPS
Targeted push campaigns have increased conversions and are driving more repeat customer purchases
OneSignal has positively impacted my organization by allowing us to reduce our cost of customer acquisition and increase our conversion rate from 40 to 65%. We have also increased our conversion rate to 30%. Additionally, OneSignal has allowed us to grow our number of subscribers organically, driving more website traffic and increasing sales engagement and campaigns from 50% to 65%. Since we are able to send more push notifications to our subscribers on their preferred device, we can reach out to them and they can see what we offer as services, enabling them to subscribe to our platform. This allows us to drive more website traffic, increase sales, enhance sales engagement, and drive more productivity. OneSignal offers the best features, including sending instant notifications without delay, providing all necessary features for testing, being highly cost-effective, handling huge volume efficiently, and providing great customer support.
MM
Manager, Integration Technical Delivery at United Delta
Middleware integration has become smoother and manages API lifecycles and scopes effectively
Regarding WSO2 API Manager, I have no drawbacks or areas for improvement. However, regarding the Micro Integrator, I had some issues while developing complex services because it was mainly designed to be used for simple services, not complex ones. While using complex services, I encountered some issues. I communicated this with WSO2, and they released other products that solved everything related to my concern. These products were released before my concern was raised. When I explored them, they were pretty good, and I did not see the same issues I had experienced. WSO2 is enhancing themselves, and their products are fine. The previous concern was about the previous product, so it is resolved now since there are new products available. I would like WSO2 to improve quality or response time in support, or both.
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Top Industries

By visitors reading reviews
Construction Company
37%
Comms Service Provider
12%
Financial Services Firm
9%
Manufacturing Company
7%
Financial Services Firm
19%
Comms Service Provider
9%
Outsourcing Company
9%
Manufacturing Company
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business6
Large Enterprise18
By reviewers
Company SizeCount
Small Business15
Midsize Enterprise7
Large Enterprise21
 

Questions from the Community

What is your experience regarding pricing and costs for OneSignal?
OneSignal is a very cost-effective and highly affordable tool.
What needs improvement with OneSignal?
I am not certain how OneSignal can be improved, but recently there are so many good CRM systems and software in the field that I can name more than five of them that I have not even experienced. Th...
What is your primary use case for OneSignal?
My main use case for OneSignal is in-app messaging and push notifications in our app.A specific example of how I use in-app messages or push notifications with OneSignal involves the Journey featur...
What needs improvement with WSO2 API Manager?
Regarding WSO2 API Manager, I have no drawbacks or areas for improvement. However, regarding the Micro Integrator, I had some issues while developing complex services because it was mainly designed...
What is your primary use case for WSO2 API Manager?
My major use cases for WSO2 API Manager are mainly for system integration between multiple layers because we are working on the middleware layer between the systems.
What advice do you have for others considering WSO2 API Manager?
The thing that I hoped WSO2 had in their integration products, not WSO2 API Manager, was AI agents, and now they have this. I believe at this stage, they have the things that the market is going th...
 

Overview

 

Sample Customers

Information Not Available
1. eBay 2. StubHub 3. Cisco 4. Verizon 5. T-Mobile 6. Vodafone 7. Orange 8. BT Group 9. Telstra 10. Deutsche Telekom 11. Swisscom 12. AT&T 13. Sprint 14. Telefonica 15. O2 16. British Airways 17. Lufthansa 18. Emirates 19. Qatar Airways 20. Etihad Airways 21. Air France 22. KLM 23. American Express 24. Visa 25. Mastercard 26. PayPal 27. Western Union 28. Citibank 29. HSBC 30. Barclays 31. Santander 32. Goldman Sachs
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