--- 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 & Product Details Claimed ###### Profile Status This profile is currently managed by CallerAPI but has limited features. Are you part of the CallerAPI team? [Upgrade your plan](https://my.g2.com/callerapi/upgrade?utm_campaign=s3&utm_medium=claim-popup&utm_source=g2) to enhance your branding and engage with visitors to your profile! 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. * * * Seller [CallerAPI](https://www.g2.com/sellers/callerapi) Discussions [CallerAPI Community](https://www.g2.com/products/callerapi/discuss) Languages Supported English Overview by Dmitry B. Show More ## Pricing Pricing provided by CallerAPI. ### Basic $25.00 Per Month ### Premium $99.00 Per Month [ View More Pricing Information ](https://www.g2.com/products/callerapi/pricing) ## Top-Rated Alternatives [ ![Plivo](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Plivo") Plivo 4.5/5(747) ](https://www.g2.com/products/plivo/reviews) [ ![Vonage Communications APIs](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Vonage Communications APIs") Vonage Communications APIs 4.2/5(404) ](https://www.g2.com/products/vonage-communications-apis/reviews) [ ![Validity Engage](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Validity Engage") Validity Engage 4.5/5(989) ](https://www.g2.com/products/validity-engage/reviews) [ View All Alternatives ](https://www.g2.com/products/callerapi/competitors/alternatives) ## User Insights Average based on 24 real user reviews. Typical contract price $0k - $0k [Sign in to view](/login) Per Month [Log in to unlock pricing and user insights](/login) ![Akshay V.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Akshay V.") AV Akshay V. Senior Software Developer Information Technology and Services Enterprise (\> 1000 emp.) 3/15/2025 "Caller API Makes Phone Verification Super Simple" 4/5 What do you like best about CallerAPI? I love how easy it is to verify phone numbers. The API is fast, accurate, and doesn’t need a complex setup. Just a few lines of code, and it works perfectly Review collected by and hosted on G2.com. What do you dislike about CallerAPI? Sometimes, the response time can be a bit slow during peak hours. Also, I wish they had more detailed error messages to debug issues faster. Review collected by and hosted on G2.com. What problems is CallerAPI solving and how is that benefiting you? It saves a lot of time by providing a single API for multiple phone verification services. Instead of using different providers, everything is unified in one place. Review collected by and hosted on G2.com. Show More 3/17/2025 Current UserValidated ReviewerIncentivizedSource: G2 invite ![insha b.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "insha b.") IB insha b. Proposal Specialist Small-Business (50 or fewer emp.) 12/18/2024 ""Revolutionizing Caller Identification with Speed and Accuracy"" 3.5/5 What do you like best about CallerAPI? It's real-time caller identification with global coverage of 2.65 billion phone numbers. The fast response time of just 0.5 seconds and its ability to detect spam and fraud calls at scale make it incredibly efficient. Plus, the affordability (10x cheaper than competitors) and seamless integration options with CRMs and no-code tools are big highlights. Review collected by and hosted on G2.com. What do you dislike about CallerAPI? What I dislike about CallerAPI is that it’s unclear how easy it is to set up with all tools, especially less common ones Review collected by and hosted on G2.com. What problems is CallerAPI solving and how is that benefiting you? CallerAPI solves the problem of identifying unknown callers and blocking spam or fraud calls. This is a big help for corporate work because it ensures you only connect with real clients and avoid wasting time on spam. It also improves communication by giving trusted information about callers, which makes follow-ups and writing to clients much easier. Review collected by and hosted on G2.com. Show More Validated ReviewerIncentivizedSource: G2 invite ![Rahul D.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Rahul D.") RD Rahul D. DevOps Engineer Information Technology and Services Mid-Market (51-1000 emp.) 3/10/2025 "Reliable API for Managing Calls Efficiently" 4/5 What do you like best about CallerAPI? CallerAPI makes it easy to automate call handling, logs everything properly, and integrates well with our DevOps workflows. Review collected by and hosted on G2.com. What do you dislike about CallerAPI? Sometimes, API response time fluctuates during high traffic, but overall, it’s stable. Review collected by and hosted on G2.com. What problems is CallerAPI solving and how is that benefiting you? It automates call handling and monitoring, reducing errors and making troubleshooting faster. Review collected by and hosted on G2.com. Show More 3/13/2025 Current UserValidated ReviewerIncentivizedSource: G2 invite ![Mahir N.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Mahir N.") MN Mahir N. Software Enginner Small-Business (50 or fewer emp.) 12/19/2024 "Effortless Caller Validation" 4/5 What do you like best about CallerAPI? I like how fast and accurate it is. It’s easy to use and helps check phone numbers quickly and securely. Review collected by and hosted on G2.com. What do you dislike about CallerAPI? It can get expensive for small businesses with limited usage. Review collected by and hosted on G2.com. What problems is CallerAPI solving and how is that benefiting you? I was working on a project that required verifying phone numbers quickly and accurately. CallerAPI made it easy by providing real-time validation, saving time, and improving data quality. Review collected by and hosted on G2.com. Show More Validated ReviewerIncentivizedSource: G2 invite ![Verified User in Information Technology and Services](/assets/icons/anonymous-avatar-purple-4ae1032bdb50ee5682003170c8184aee790d25958bd397abbd384ba52c596a7b.svg "Verified User in Information Technology and Services") UI Verified User in Information Technology and Services Small-Business (50 or fewer emp.) 2/20/2025 "Great Experience" 3.5/5 What do you like best about CallerAPI? Helps identify callers, track calls, automate logs, improve customer service, and integrate with CRM & VoIP systems Review collected by and hosted on G2.com. What do you dislike about CallerAPI? Privacy concerns, API costs, occasional inaccurate caller data, dependency on third-party providers, and spam detection limitations Review collected by and hosted on G2.com. What problems is CallerAPI solving and how is that benefiting you? CallerAPI helps identify callers, track calls, and log interactions automatically. It saves time, reduces spam, improves customer service, and integrates with CRM systems. Review collected by and hosted on G2.com. Show More Validated ReviewerIncentivizedSource: G2 invite ![Ramprasad V.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Ramprasad V.") RV Ramprasad V. Tech Lead Small-Business (50 or fewer emp.) 12/11/2024 "ReviewCallerAPI" 4/5 What do you like best about CallerAPI? One of the standout fetautres is its comprehensive set of tools for managing calls,including real-time tracking and detailed reporting.The API's response time is impressive,ensuring smooth and reliable performance even under high triffic conditions. Review collected by and hosted on G2.com. What do you dislike about CallerAPI? Customer Support needs to be improved and in terms of expanding integrtaions with third party systems . Review collected by and hosted on G2.com. What problems is CallerAPI solving and how is that benefiting you? High performance Review collected by and hosted on G2.com. Show More Validated ReviewerIncentivizedSource: G2 invite ![Deepak R.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Deepak R.") DR Deepak R. Cloud; DevOps Engineer Small-Business (50 or fewer emp.) 9/4/2024 "Easier Identify and validation of phone numbers at bulk using callerAPI" 3.5/5 What do you like best about CallerAPI? We use upload things as .csv at bulk to validate with api Review collected by and hosted on G2.com. What do you dislike about CallerAPI? Pricing is somewhat higher and the api has some latency Review collected by and hosted on G2.com. What problems is CallerAPI solving and how is that benefiting you? Identify and verification of valid phone numbers Review collected by and hosted on G2.com. Show More Current UserValidated ReviewerIncentivizedSource: G2 invite ![Aparna T.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Aparna T.") AT Aparna T. Associate Consultant Small-Business (50 or fewer emp.) 9/11/2024 "Verifying caller's Identity with callerAPI" 4/5 What do you like best about CallerAPI? It offers real-time caller identification, allowing businesses and developers to enhance their applications with accurate and comprehensive phone number information. We can use it to upload things to .csv to validate an api in bulk process. Review collected by and hosted on G2.com. What do you dislike about CallerAPI? Pricing rate is little higher. high Latency in api sometimes. Review collected by and hosted on G2.com. What problems is CallerAPI solving and how is that benefiting you? We can easily identify and verify phone numbers. Review collected by and hosted on G2.com. Show More Validated ReviewerIncentivizedSource: G2 invite ![Verified User in Biotechnology](/assets/icons/anonymous-avatar-purple-4ae1032bdb50ee5682003170c8184aee790d25958bd397abbd384ba52c596a7b.svg "Verified User in Biotechnology") EB Verified User in Biotechnology Enterprise (\> 1000 emp.) 12/12/2024 "User Friendly and Easy To Understand" 4/5 What do you like best about CallerAPI? Quick, less hands on time, accurate and user friendly. Review collected by and hosted on G2.com. What do you dislike about CallerAPI? Hangs up occasionally, unavailable offline. Review collected by and hosted on G2.com. What problems is CallerAPI solving and how is that benefiting you? Verification made easy, accurate and reduced the dependency on external sources of verification. Review collected by and hosted on G2.com. Show More Validated ReviewerSource: Organic ![Verified User in Information Technology and Services](/assets/icons/anonymous-avatar-purple-4ae1032bdb50ee5682003170c8184aee790d25958bd397abbd384ba52c596a7b.svg "Verified User in Information Technology and Services") UI Verified User in Information Technology and Services Mid-Market (51-1000 emp.) 9/17/2024 "CallerAPI Good Experience" 4/5 What do you like best about CallerAPI? Ease of use, flexibility, and technology works great for API connections to various platforms Review collected by and hosted on G2.com. What do you dislike about CallerAPI? It can get glitchy at times. A few times we have had to re-start from the begining as nothing has saved. Review collected by and hosted on G2.com. What problems is CallerAPI solving and how is that benefiting you? Creates connectors with various platforms for our tool - allows for automation Review collected by and hosted on G2.com. Show More Validated ReviewerIncentivizedSource: G2 invite ## Pricing Options Pricing provided by CallerAPI. ### Basic $25.00 Per Month ### Premium $99.00 Per Month ### Enterprise $997.00 250000 Lookups With One-Time Purchase [ View More Pricing Information ](https://www.g2.com/products/callerapi/pricing) ##### ##### CallerAPI Features Platform Basics - Phone Verification Accuracy Call Screening Scalability Additional Features - Phone Verification Integration Abilities Compliance with Regulations Reporting and Analytics [ View More Features ](https://www.g2.com/products/callerapi/features) ##### Categories on G2 [Phone Verification](https://www.g2.com/categories/phone-verification) ##### Explore More [What's the leading network monitoring software for business use](https://www.g2.com/discussions/what-s-the-leading-network-monitoring-software-for-business-use)[Top-rated AI solutions available on AWS Marketplace](https://www.g2.com/discussions/which-ai-solutions-on-aws-marketplace-are-the-most-impactful-right-now)[Which AI content tool offers the most natural language output?](https://www.g2.com/discussions/which-ai-content-tool-offers-the-most-natural-language-output) [Which business process management platforms are rated highest for reducing implementation time and ensuring user adoption?](https://www.g2.com/discussions/which-business-process-management-platforms-are-rated-highest-for-reducing-implementation-time-and-ensuring-user-adoption)[Best CRM with sales enablement features](https://www.g2.com/discussions/best-crm-with-sales-enablement-features-what-s-worth-using-together)[Pros and Cons Details](https://www.g2.com/products/callerapi/reviews?qs=pros-and-cons) [Show MoreShow Less](javascript:void(0);)