--- 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: '2026-08-05' 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) - [View CallerAPI pricing details and edition comparison](https://www.g2.com/products/callerapi/reviews?filters%5Bnps_score%5D=2§ion=pricing&secure%5Bexpires_at%5D=2026-08-06+07%3A38%3A29+-0500&secure%5Bsession_id%5D=1987646a-4483-4e34-a2c2-4be92547ed35&secure%5Btoken%5D=f73bafc46669443d3486f3fa2f5c2af18fae3e69189a61fc09b0cc4bc9758d7b&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 (805 reviews)