--- title: CallerAPI Reviews meta_title: 'CallerAPI Reviews 2026: Details, Pricing, & Features | G2' meta_description: Filter 24 reviews by the users' company size, role or industry to find out how CallerAPI works for a business like yours. aggregate_rating: rating_value: 4.3 review_count: 24 scale: '5' date_modified: '2026-08-07' parent_category: name: Office Management Software url: https://www.g2.com/categories/office-management-software --- # CallerAPI Reviews **Vendor:** CallerAPI **Category:** [Phone Verification Software](https://www.g2.com/categories/phone-verification) **Average Rating:** 4.3/5.0 **Total Reviews:** 24 ## About CallerAPI CallerAPI is a Caller ID, robocall prevention and telecom spam protection platform that gives carriers, MVNOs, CPaaS and UCaaS providers, Voice AI platforms, SIP/VoIP operators, and mobile security vendors real-time phone intelligence to stop spam, reduce fraud, and increase revenue. Through a single scalable API, a self-hosted spam feed, white-label SDKs, and a SIP firewall, CallerAPI delivers: - Spam score, reputation, and complaint history - Business identity (name, location, industry) across 195 countries - Carrier data, number type, and optional HLR lookup - Live fraud and spam detection covering 30+ countries The spam database updates every 60 seconds with 15 days of rolling history, enabling zero-latency blocking at the switch or network edge. Average API response times are under 300 ms, and the infrastructure is built to handle hundreds of millions of lookups per day. Most customers use CallerAPI in two ways: to cut the cost of answering or processing spam calls, and to resell spam protection and caller intelligence as a branded value-added service that increases ARPU and reduces churn. White-label SDKs (Swift, Java/Kotlin, Flutter, React Native) and an Asterisk module let platforms keep their own brand in front of end users. Self-serve plans start at $25/month, with volume tiers scaling to tens of millions of monthly lookups. The Spam Database Feed, SDKs, and turnkey integrations are licensed directly to match each deployment. CallerAPI is a founder-led company based in Switzerland, with the main operating entity located in the US, focused on practical, high-accuracy telecom protection that sits quietly in the call path and helps operators, platforms, and apps keep networks clean and customers protected. ## CallerAPI Pros & Cons **What users like:** - Users find CallerAPI **very simple to use** , providing quick call details and efficient spam detection for effective tracking. (7 reviews) - Users value the **seamless API integration** of CallerAPI, enhancing call identification and reducing spam effectively. (6 reviews) - Users appreciate the **easy integrations** of CallerAPI, which seamlessly fit into existing workflows and tools. (5 reviews) - Users value the **real-time data** feature of CallerAPI, enhancing call tracking and spam identification effectively. (5 reviews) - Users value the **simple and user-friendly interface** of CallerAPI, enhancing call management efficiency and workflow. (5 reviews) - Users value the **impressive performance** of CallerAPI, with fast, accurate phone verification and seamless functionality. (4 reviews) - Automation (3 reviews) - Easy Setup (3 reviews) - Features (3 reviews) - Data Integration (2 reviews) **What users dislike:** - Users find CallerAPI **too expensive** for small businesses, making it hard for many to justify the cost. (4 reviews) - Users often experience **slow performance** during peak hours, with delayed call log updates impacting their workflow. (4 reviews) - Users express dissatisfaction with **poor customer support** , highlighting slow response times and a need for better service improvements. (3 reviews) - Users express concerns about **billing issues** , citing lack of transparency and challenges for smaller businesses in managing costs. (2 reviews) - Users find the **complex setup** of CallerAPI time-consuming and unclear, particularly with less common tools. (2 reviews) - Limited Customization (2 reviews) - Users feel the **pricing issues** of CallerAPI make it tough for small businesses to afford full features. (2 reviews) - API Limitations (1 reviews) - Data Management (1 reviews) - Integration Issues (1 reviews) ## CallerAPI Reviews ### 1. Great Experience with Caller API **Rating:** 4.5/5.0 stars **Reviewed by:** Kartik G. | React.js Developer, Information Technology and Services, Small-Business (50 or fewer emp.) **Reviewed Date:** March 10, 2025 **What do you like best about CallerAPI?** CallerAPI fit into our existing setup easily. As a React developer, I often worry about compatibility with other tools, but CallerAPI works well with both our front-end (React) and our backend server. **What do you dislike about CallerAPI?** Sometimes, when we check very uncommon or new phone numbers, CallerAPI doesn’t have much info on them **What problems is CallerAPI solving and how is that benefiting you?** when a new user signed up on our site, we wanted to check if the phone number they provided was real and to know if it might be associated with spam. CallerAPI solved this problem for us. By integrating CallerAPI, we can now instantly get information about any phone number. ### 2. Reliable and Easy-to-Use Caller Management Tool **Rating:** 4.5/5.0 stars **Reviewed by:** Prashant B. | Consultant, Information Technology and Services, Enterprise (> 1000 emp.) **Reviewed Date:** March 05, 2025 **What do you like best about CallerAPI?** CallerAPI helps our team manage calls smoothly. The interface is simple, and we can easily track call logs, record conversations, and analyze data. It saves a lot of time and improves our workflow. **What do you dislike about CallerAPI?** Sometimes, the call analytics take longer to load, especially during peak hours. Also, I wish there were more customization options for reports. **What problems is CallerAPI solving and how is that benefiting you?** CallerAPI has streamlined our call tracking process, saving us a lot of manual work. We can now automatically log, monitor, and analyze calls, which improves customer interactions and support efficiency. ### 3. Easy and Reliable Caller API for Business Needs **Rating:** 4.5/5.0 stars **Reviewed by:** Sushant S. | Associate Business Analyst, Enterprise (> 1000 emp.) **Reviewed Date:** March 07, 2025 **What do you like best about CallerAPI?** CallerAPI is very simple to use. It gives quick and clear call details, helping me track all important calls without any trouble. The setup is easy, and the reports are useful. **What do you dislike about CallerAPI?** Sometimes, the call logs take a little longer to update. Also, I wish there were more customization options in the reports. **What problems is CallerAPI solving and how is that benefiting you?** It helps me keep a record of all business calls, so I never miss any important details. It also helps my team analyze call patterns and improve customer interactions. ### 4. A Must-Have Tool for Developers Building Call Features **Rating:** 4.5/5.0 stars **Reviewed by:** Abhijeet R. | Full Stack Developer, Information Technology and Services, Small-Business (50 or fewer emp.) **Reviewed Date:** February 27, 2025 **What do you like best about CallerAPI?** The seamless integration with both frontend and backend systems saves me hours of coding, and the documentation is crystal clear. **What do you dislike about CallerAPI?** Advanced features like custom call routing require extra setup, which can feel time-consuming for complex projects. **What problems is CallerAPI solving and how is that benefiting you?** It handles caller authentication and spam detection automatically, letting me focus on core app features. ### 5. Simple Call Tracking & Great Analytics **Rating:** 4.5/5.0 stars **Reviewed by:** Vaishali V. | SEO SMO Executive, Information Technology and Services, Mid-Market (51-1000 emp.) **Reviewed Date:** March 08, 2025 **What do you like best about CallerAPI?** It helps me track calls in real-time and gives clear reports. **What do you dislike about CallerAPI?** Sometimes, call logs take a few seconds to update. **What problems is CallerAPI solving and how is that benefiting you?** I struggled to track call leads from ads. CallerAPI made it easy by showing call sources and details instantly. ### 6. Streamlined API Solution for Everyday Needs **Rating:** 4.5/5.0 stars **Reviewed by:** Sajith M. | Software Developer, Computer Software, Small-Business (50 or fewer emp.) **Reviewed Date:** December 20, 2024 **What do you like best about CallerAPI?** CallerAPI is extremely user-friendly, with clear documentation and seamless integration capabilities. The response times are fast, and the dashboard makes tracking API usage intuitive. **What do you dislike about CallerAPI?** There are occasional issues with customer support response times, and the pricing structure could be more transparent, especially for smaller businesses. **What problems is CallerAPI solving and how is that benefiting you?** CallerAPI has simplified API management by offering robust features like real-time monitoring and detailed logs. It helps reduce development time by providing prebuilt integrations and ensures scalability as our business grows. ### 7. Efficient and Reliable API for Call Management **Rating:** 5.0/5.0 stars **Reviewed by:** Manoj M. | Full Stack Developer, Small-Business (50 or fewer emp.) **Reviewed Date:** February 27, 2025 **What do you like best about CallerAPI?** It is very easy to integrate, and it's best for call tracking and management, and it simple to work with. **What do you dislike about CallerAPI?** some times facing delays in data updates. **What problems is CallerAPI solving and how is that benefiting you?** Its very easy method to verify number, reducing fraud and improving security. ### 8. Best tool to identify call **Rating:** 5.0/5.0 stars **Reviewed by:** SHAIK S. | System Admin, Enterprise (> 1000 emp.) **Reviewed Date:** April 28, 2025 **What do you like best about CallerAPI?** CallerAPI helps us to identify calls and helps us reduce spam calls. **What do you dislike about CallerAPI?** CallerAPI is very expensive for everyone to afford. **What problems is CallerAPI solving and how is that benefiting you?** CallerAPI helps in detecting spam phone calls. It reduce the phone calls from spam. ### 9. Efficient Caller Identification tool to identify phone numbers **Rating:** 5.0/5.0 stars **Reviewed by:** Panchal H. | Wordpress Developer, Mid-Market (51-1000 emp.) **Reviewed Date:** December 23, 2024 **What do you like best about CallerAPI?** Caller API makes it easier to identify phone numbers and validates services that provide trustworthy caller ID API. Furthermore, it gives users and developers real-time identification so they may provide accurate and legitimate phone number information to their applications. It has a global reach and can recognize callers from various sources. It also makes it easier to identify spam callers. **What do you dislike about CallerAPI?** While everything comes at some price, small business budgets could find it too expensive. **What problems is CallerAPI solving and how is that benefiting you?** Spam calls which are the biggest headach now a days. CallAPI solves this by filtering the spam calls. ### 10. Best tool to Identify and Block Fraud Calls **Rating:** 4.5/5.0 stars **Reviewed by:** Keerthanaa N. | Web Developer, Small-Business (50 or fewer emp.) **Reviewed Date:** December 11, 2024 **What do you like best about CallerAPI?** Easy to identify spam & fraud calls with real time tracking. **What do you dislike about CallerAPI?** The pricing may be bit high for small business budgets **What problems is CallerAPI solving and how is that benefiting you?** Provides accurate caller ID tracking and fraud detection for identifying spam ### 11. Caller API - Best app for phone number identification **Rating:** 4.5/5.0 stars **Reviewed by:** Ruchita A. | Quality assurance , Mid-Market (51-1000 emp.) **Reviewed Date:** September 26, 2024 **What do you like best about CallerAPI?** Caller API is useful for phone number identification and validates services that provide robust caller ID API. It also offers real time identification to developers and its users to improve their application with accurate and genuine phone number information. It has a global coverage with multiple sources to identify callers. It also helps us to detect spam callers. It is a GDPR compliance certified application. **What do you dislike about CallerAPI?** Nothing to dislike as it meets our business requirements. **What problems is CallerAPI solving and how is that benefiting you?** It helps us to identify callers information. Also let us know if the call is a spam call or not. Even helps to find caller information from multiple sources across global. ### 12. Best tool to identify phone numbers **Rating:** 5.0/5.0 stars **Reviewed by:** Sappa Jawahar T. | System administrator, Enterprise (> 1000 emp.) **Reviewed Date:** December 29, 2024 **What do you like best about CallerAPI?** CallerAPI is easy to use and it helps to detect spam calls .It is fast and accurate. It helps us to check the phone number . **What do you dislike about CallerAPI?** CallerAPI is very expensive to afford it. the customer support is not good. **What problems is CallerAPI solving and how is that benefiting you?** CallerAPI helps in detecting the phone number . It detect spam calls which save a lot of time. ### 13. Best tool from Spam detecting **Rating:** 5.0/5.0 stars **Reviewed by:** Sri Mani Kiran V. | System administrator, Enterprise (> 1000 emp.) **Reviewed Date:** December 29, 2024 **What do you like best about CallerAPI?** Caller API provied good features like fruad and spam calls detection and it's very easy to use and also helps in call tracking. **What do you dislike about CallerAPI?** To use all features caller API subscription plans are a bit expensive. **What problems is CallerAPI solving and how is that benefiting you?** Caller API helps in detecting spam and fraud calls. which saves me from any form of cyber crimes. ### 14. Ease of Implementation **Rating:** 4.5/5.0 stars **Reviewed by:** Verified User in Computer Software | Mid-Market (51-1000 emp.) **Reviewed Date:** October 11, 2024 **What do you like best about CallerAPI?** its very easy to implemenation and can help identifying fraud callers or verify caller ids. **What do you dislike about CallerAPI?** there is nothing as such which I dislike **What problems is CallerAPI solving and how is that benefiting you?** Help me verify and identify caller using apis and validate data. - [View CallerAPI pricing details and edition comparison](https://www.g2.com/products/callerapi/reviews?filters%5Bnps_score%5D=5§ion=pricing&secure%5Bexpires_at%5D=2026-08-07+15%3A03%3A36+-0500&secure%5Bsession_id%5D=b516a2bf-3369-4971-8c47-c4e5432643ed&secure%5Btoken%5D=d2786873cfbecb46a96c67f828e01ab43f3e4f1751e2e497c109181aeca72ee3&format=llm_user) ## CallerAPI Features **Platform Basics - Phone Verification** - Accuracy - Call Screening - Scalability - Security Measures - Reliable Delivery - Customizable Workflows **Additional Features - Phone Verification** - Integration Abilities - Compliance with Regulations - Reporting and Analytics **Agentic AI - Phone Verification** - Autonomous Task Execution ## Top CallerAPI Alternatives - [Plivo](https://www.g2.com/products/plivo/reviews) - 4.5/5.0 (743 reviews) - [Vonage Communications APIs](https://www.g2.com/products/vonage-communications-apis/reviews) - 4.2/5.0 (368 reviews) - [Fivetran](https://www.g2.com/products/fivetran/reviews) - 4.3/5.0 (807 reviews)