AI Call Tracking Software Comparison 2026: CallRail, Invoca, CTM (formerly CallTrackingMetrics) and 7 More (Pricing & Free Plans)

Choosing AI call tracking software is harder than it looks. Tools differ in pricing model, AI features, and the countries where they sell phone numbers. Some publish plan prices, while others only offer quotes. Many add per-use charges for numbers, minutes, and AI analysis on top of the monthly fee.

This article compares ten tools: CallRail, Invoca, CTM (formerly CallTrackingMetrics), WhatConverts, Nimbata, Convirza, Marchex, Ringba, Retreaver, and CallScaler. We look at pricing, free plans or trials, Japanese support, supported platforms, and each tool's strengths and weaknesses. We compared them using each vendor's official website, checked in November 2026.

After the tool-by-tool sections, you will find recommendations by goal and tips for choosing without regrets. Japanese support is limited for most of these tools, so we call out what each vendor states and what it does not.

What Is AI Call Tracking Software? What It Does and What to Know Before Choosing

AI call tracking software shows which ads, keywords, and channels lead to phone calls. It typically swaps the phone number shown on your website (DNI) so each visitor source can be tied to a call. On top of that, AI features transcribe calls, summarize them, and score them for quality or lead value.

Some tools also offer AI voice agents that answer calls, or let you query call data from AI assistants through an MCP server. The tools in this article differ widely in how many of these features they include.

• Ad attribution: link calls, SMS, and forms to ads and keywords, and send results back to ad platforms.
• Call summaries and sentiment: read short summaries instead of listening to every recording.
• Lead scoring and tagging: flag which calls were bookings, sales, or missed opportunities.
• Quality management and coaching: score agent calls against a script or scorecard.
• AI voice agents: answer after-hours calls and qualify leads, as offered by CallRail and CTM (formerly CallTrackingMetrics).

Before choosing, check what the free plan or trial covers. CallRail, WhatConverts, Nimbata, and CallScaler list a 14-day free trial. Nimbata also has a $0/month Entry plan. Invoca and Marchex do not state a free plan or trial, and Retreaver does not either.

Next, check Japanese support. Most tools in this group are English-first. Some sell Japan numbers, some support Japanese in transcription, and some do neither. These are separate questions, so verify both. Also consider size: Invoca is positioned for large and mid-sized companies, while CallScaler and WhatConverts have lower entry prices.

Finally, compare the pricing model. Some tools charge a monthly fee plus usage for numbers, minutes, and AI. Others are usage-only, such as Retreaver, or quote-based, such as Invoca. Check platforms too, since mobile apps and API access vary. Check the official website for the latest pricing and features.

Comparison Table of Top 10 Tools (Pricing, Japanese Support, Platforms)

Tool	Main plans	Japanese support	Platforms
CallRail	14-day free trial / Lead Tracking $50/month / Lead Tracking Complete $95/month	Partial	Web, iOS, Android, API
Invoca	Contact sales	Not supported	Web, API
CTM (formerly CallTrackingMetrics)	Marketing Lite $79/month / Marketing Pro $179/month / Sales Engage $329/month	Partial	Web, Mobile app (CTM Phone), API
WhatConverts	14-day free trial / Single account: Call Tracking $30/month, Plus $60/month, Pro $100/month, Elite $160/month	Partial	Web, API
Nimbata	14-day free trial / Entry $0/month + usage-based / Pro $39/month / Marketing $89/month	Partial	Web, API, MCP server (Claude)
Convirza	App: Starter $29/month, Agency $149/month / API: Free $0/month, Pro $18/month, Scale from $92/month	Partial	Web, API, MCP server (Claude, ChatGPT, Cursor, VS Code)
Marchex	See the official website	Not supported	Web, API
Ringba	Business $147/month / Professional $297/month (plus usage) / Enterprise: contact sales	Not confirmed	Web, API
Retreaver	Calls from $0.05/minute	Not confirmed	Web, iOS (iPhone and iPad), API, MCP server
CallScaler	14-day free trial / Call Tracking $65/month + usage / Pay Per Call $400/month + usage	Not supported	Web, API, MCP server

AIpedia has not rated these tools, because they do not have their own pages on AIpedia yet. Pricing and plans change; we checked each vendor's official website in November 2026. Check the latest information on the official website before you sign up.

Features, Pricing, and Best For: 10 Tools

1. CallRail

CallRail is a call tracking and lead management tool from the US. It measures phone, SMS, and form inquiries by ad, keyword, and channel using DNI. Call recording, routing, and automation rules are handled in a single screen.

Higher plans add AI features. Premium Conversation Intelligence™ provides call summaries, sentiment analysis, and AI lead scoring, and Voice Assist is an AI voice agent that answers calls and texts.

• Strengths: The pricing page lists the monthly fee and overage rates for each plan. You can start a 14-day free trial without a credit card.
• Strengths: AI features such as call summaries, sentiment analysis, and AI lead scoring are bundled in Lead Conversion and higher plans. Voice Assist can answer calls outside business hours.
• Strengths: It integrates with more than 50 tools, including Google Ads, Google Analytics, HubSpot, and Salesforce. Mobile apps for iOS and Android show call logs, recordings, and summaries for users in the US and Canada.
• Things to note: Tracking numbers are offered only in the US, Canada, the UK, and Australia. Japanese phone numbers (+81) cannot be purchased. Transcription supports 17 languages including Japanese, but call summaries and other AI results are returned in English.
• Things to note: Usage-based charges apply on top of the monthly fee. The pricing page also shows inconsistent figures for the local call overage rate ($0.05/$0.06) and free Voice Assist calls (50/55).

Pricing: According to the official pricing page as of November 7, 2026, Lead Tracking is $50/month billed annually ($55/month billed monthly). Lead Tracking Complete is $95/month ($105/month), Lead Conversion is $150/month ($165/month), and Lead Conversion Complete is $195/month ($215/month). All plans include 5 local numbers, 250 minutes, and 25 SMS, and overage is usage-based, such as $3 each for additional local numbers. A 14-day free trial requires no credit card. Voice Assist is listed from $95/month, and the standalone offering is available in the US only. The API is included in all plans.

Best for: Companies and agencies running ads in the US, Canada, the UK, or Australia that want call tracking, AI summaries, and many integrations in one tool.

2. Invoca

Invoca is an AI call tracking and conversation analytics platform for large and mid-sized B2C companies. It targets fields such as healthcare, insurance, finance, automotive, and telecommunications, where phone calls are an important conversion channel. Call attribution via DNI measures results down to the keyword, ad, and session level.

Offline deal data can be sent back to Google Ads, Microsoft Ads, and others to help optimize bidding. Signal AI handles conversation analytics.

• Strengths: It covers marketing attribution, voice and SMS AI agents, and contact center quality management on one platform. The AI Voice Agent "Nico" answers calls 24 hours a day.
• Strengths: Signal AI Studio lets you build custom AI models trained on your own call data. The vendor also offers AI-powered quality management with automatic scoring.
• Strengths: The official site states compliance with SOC 2 Type 2, ISO 27001, HIPAA (BAA), GDPR, and CCPA. The pricing page publishes the number count, custom Signals, and main integrations per plan.
• Things to note: All plans are quote-based annual contracts, and no price guidelines are published. Signal AI and quality management are add-ons with undisclosed prices.
• Things to note: Available regions are the US, Canada, and the UK. Japanese phone numbers and Japanese are not supported. Official information positions it for large enterprises, so it may be more than a small business with low call volume needs.

Pricing: A free plan and free trial are not stated. On the official pricing page as of November 7, 2026, no amounts are listed ("Get Your Quote"). Pro is contact sales (6,000 local and toll-free numbers per year, 5 custom Signals). Enterprise is contact sales (12,000 numbers per year, 50 custom Signals, SAML SSO, sandbox environment). Elite is contact sales (18,000 numbers per year, 100 custom Signals, PreSense included). Performance Professional and Performance Enterprise for pay-per-call affiliates are also contact sales. Signal AI, AI-Powered Quality Management, PreSense, and others are add-ons with prices not disclosed. According to the official LLM information page, all plans are quote-based annual contracts.

Best for: Large or mid-sized B2C companies in North America or the UK that want call attribution and AI conversation analytics on one platform and can work with quote-based contracts.

3. CTM (formerly CallTrackingMetrics)

CTM (formerly CallTrackingMetrics) combines call tracking, marketing attribution, conversation analytics, and lead management. It was founded in 2011 as CallTrackingMetrics, and the official LLM information page says it rebranded to CTM in 2026. It uses DNI to swap numbers by ad and keyword, and brings SMS, forms, and chat into the same contact.

It also includes IVR, queues, a softphone, and an outbound dialer.

• Strengths: The pricing page publishes monthly, annual, and 2-year billing fees, plus usage-based rates for AI features. All plans have unlimited users, and there is no plan fee in the first month.
• Strengths: AskAI lets you set your own questions to automate call scoring and classification. VoiceAI is an AI voice agent that answers calls, qualifies leads, and handles booking and transfers.
• Strengths: The official global pricing page confirms that Japanese toll-free numbers (+81) can be purchased. Integrations include Google Ads, GA4, HubSpot, Salesforce, and Zoom, with API, webhooks, Zapier, and Make for extension.
• Things to note: Plans do not include numbers or call minutes, so numbers, calls, transcription, and AI features are each billed by usage. In Japan, local numbers are shown as N/A and toll-free numbers are $56/month, higher than in the US.
• Things to note: A list of languages supported for transcription is not published, so Japanese call analysis is unconfirmed. The Enterprise billing terms differ between the plan card and the comparison table.

Pricing: According to the official pricing page as of November 7, 2026, the plan fee is $0 for the first month on all plans. Marketing Lite is $79/month billed monthly ($65/month billed annually, $60/month with 2-year billing). Marketing Pro is $179/month ($149/month, $135/month). Sales Engage is $329/month ($274/month, $247/month). Enterprise is from $1,999/month ($1,500/month with 2-year billing). Numbers and call minutes are usage-based, with US local numbers from $2.00/month and toll-free numbers from $3/month. Transcription plus AI summaries are $0.02/minute, AskAI Custom Asks are from $0.01/question, AskAI Summaries are $0.05 each, and VoiceAI is $0.12/minute (60 minutes included per agent).

Best for: Teams that want call tracking, AI call scoring, and an optional AI voice agent with pay-as-you-go AI pricing, including those that need Japanese toll-free numbers.

4. WhatConverts

WhatConverts is a lead tracking tool that measures phone calls, forms, chat, and e-commerce transactions together. It shows which marketing efforts led to leads and revenue. It offers DNI, keyword-level tracking, call recording, and call flows including IVR.

A plan with unlimited accounts is available for agencies. AI Lead Analysis on the Elite plan summarizes calls and inquiries and extracts intent, sentiment, and keywords.

• Strengths: The pricing page lists plan prices and per-country usage rates, and you can start from $30/month. A 14-day free trial is available.
• Strengths: It measures calls, forms, chats, and e-commerce transactions in one place. It offers local numbers in Japan (+81) and a plan with unlimited accounts for agencies.
• Strengths: Ask AI rules can answer questions such as "Was an appointment booked?" and write the answer to custom fields. The official website lists more than 1,000 integrations.
• Things to note: AI Lead Analysis and Ask AI are limited to the Elite plan. The additional cost of AI analysis is not stated on the pricing page, and the help says you approve it when creating a rule.
• Things to note: Japanese is not among the supported transcription languages, which are English, Spanish, French, German, Italian, Portuguese, and Dutch. Japanese local numbers cost $10.00 per additional number, versus $2.50 in the US.

Pricing: According to the official pricing page as of November 7, 2026, there is a 14-day free trial. Single-account plans are Call Tracking $30/month, Plus $60/month, Pro $100/month, and Elite $160/month, each including $30 in free usage credit. Agency plans (unlimited accounts) are Plus $500/month (includes $250 credit), Pro $800/month (includes $300 credit), and Elite $1,250/month (includes $400 credit). Usage-based US rates include additional local numbers at $2.50 each ($1.75 on agency plans), call transcription at 2¢/minute, and incoming SMS at 3¢ each. Japan local numbers are $10.00 per additional number and 8¢/minute for calls.

Best for: Marketers and agencies that want to track calls, forms, and chats together and may need Japan numbers, accepting that AI content analysis of Japanese calls is not expected.

5. Nimbata

Nimbata is a call tracking tool that charges per answered call rather than by call duration. With DNI, it serves different numbers per ad or keyword and passes call sources back to Google Ads and GA4. It also offers form tracking, call flows, and spam blocking.

The official website says it provides tracking numbers in more than 70 countries. Nimbata AI determines the intent, outcome, lead quality, and call value of each call.

• Strengths: Billing is per answered call, so costs are easier to predict for long calls. You can start with the $0/month Entry plan, and all plans come with a 14-day free trial.
• Strengths: Japan is in the supported country list, and per-country number fees are shown on the pricing page. Workflows can write data to HubSpot or Salesforce and send conversions with values to Google Ads.
• Strengths: An MCP server on all plans lets you ask Claude about calls and reports in natural language.
• Things to note: AI summaries, AI tagging, and keyword detection are Pro and above, and active workflows are limited by plan (Pro 1, Marketing 5). Japan numbers cost $38.00/month on Entry, and activation requires documents such as company registration documents and proof of address.
• Things to note: Transcription supports one language per call. Japanese transcription support is not explicitly stated on the official pages, so confirm it before adopting.

Pricing: According to the official pricing page as of November 7, 2026, Entry is $0/month, Pro is $39/month (billed annually $35/month), Marketing is $89/month (billed annually $80/month), and Agency is $149/month (billed annually $120/month). Usage-based charges for numbers and answered calls are added to all plans. The 14-day free trial requires no credit card and covers up to 2 numbers and 50 answered calls. US local numbers are $4.60/month (Entry) to $1.60/month (Agency), and Japan local numbers are $38.00/month (Entry) to $13.30/month (Agency). Transcription is $0.02/minute, and additional seats are $5/month.

Best for: Small and medium-sized businesses and agencies that want a free starting point, per-answered-call billing, and the option of Japan numbers.

6. Convirza

Convirza is a call tracking tool that positions itself as a conversation intelligence platform. It scores calls with AI to find missed opportunities. It includes campaign-level tracking numbers, DNI, call recording, and routing.

It is offered in three forms: an app for teams, an API to embed in your own products, and Enterprise. The official website says it is used at more than 72,000 locations.

• Strengths: The pricing page publishes plan prices and per-minute rates for each AI feature. The API has a $0/month Free plan with 100 scorings per month.
• Strengths: Conversation Analytics™ scores calls on conversion, booking intent, script adherence, and whether an upsell was attempted. According to the official knowledge base, transcription and analytics support 36 languages including Japanese.
• Strengths: Convirza MCP lets you work with call data, transcripts, and scores from Claude, ChatGPT, and Cursor. An AI voice agent answers after-hours calls.
• Things to note: Each AI feature is billed per minute, so costs are hard to estimate at high call volume. The language must be set in advance in the account, and API pricing adds +$0.05/minute for non-English calls.
• Things to note: Per-call rates cover only the US, Canada, and similar regions. Japanese phone numbers are not mentioned, so tracking with Japan numbers cannot be confirmed.

Pricing: According to the official pricing page as of November 7, 2026, the app is Starter $29/month and Agency $149/month. The API is Free $0/month (one-time $20 credit, 100 free scorings per month, no card required), Pro $18/month (billed annually), and Scale from $92/month (billed annually). Enterprise is contact sales. App usage rates include call recording at $0.08/minute, numbers at $3/month, summary and transcription at $0.02/minute, standard AI scoring at $0.02/minute, advanced scoring at $0.03/minute, and the AI voice agent from $0.50/minute.

Best for: Teams that mainly want AI scoring of calls, including Japanese-language calls, and are comfortable with per-minute usage billing.

7. Marchex

Marchex is a US company that offers conversation intelligence products. They analyze customer conversations such as calls and SMS with AI for marketing, sales, and customer experience. The core "Marchex Engage Platform" includes the Marchex Portal, Mind+ AI, call data ingestion, and APIs.

Call tracking is offered as Marketing Edge, with DNI and multichannel attribution. The official website lists automotive, home services, healthcare, real estate, and advertising and media as focus industries.

• Strengths: With Bring Your Own Conversations, you can apply AI analysis to calls from Twilio, Five9, RingCentral, 8x8, and others without moving your numbers.
• Strengths: It provides industry-specific insights for automotive, home services, healthcare, and real estate. Metrics and recommendations are available by department, such as marketing and sales.
• Strengths: Spanish and French calls are detected, transcribed, and translated into English.
• Things to note: Pricing is not published, and the plan structure is unknown. There is no mention of a free trial, so you need to request a demo.
• Things to note: Japanese and Japanese phone numbers are not mentioned. If you want to analyze Japanese calls, ask the vendor whether they are supported.

Pricing: As of November 7, 2026, the official website does not list prices. Inquiries are made through "Get Started Today" or a demo request. Plan names and a free plan or free trial are not mentioned. Check the official website for the latest pricing and features.

Best for: Companies in industries such as automotive, home services, and healthcare that want AI analysis of conversations on their existing phone systems and can go through a demo process.

8. Ringba

Ringba is a call tracking and call routing platform for pay-per-call operators who buy and sell phone leads. It also serves advertisers who collect calls from ads. Features include Call Flows®, Ring Trees®, real-time bidding (RTB), and Ping/Post.

It offers AI voice response (Interactive Voice Agent), call analysis, and transcription on a usage basis.

• Strengths: The pricing page lists monthly fees and usage rates, including transcription, Call Analysis, and Voice Agents. The FAQ states there is no contract term commitment or setup fee.
• Strengths: It offers a full set of tools for buying and selling calls. Integrations include Google Ads, Facebook Ads, Jornaya, TrustedForm, Zapier, and Make, plus pixels and webhooks.
• Things to note: The voice agent is for structured information collection and keyword-based routing, not free-form sales conversations. Full-text search of transcripts and content-based alerts are not provided as standard.
• Things to note: The annual billing amount could not be confirmed. No mention was found of Japanese phone numbers, Japanese transcription, or a Japanese UI.

Pricing: According to the official pricing page as of November 7, 2026, Business is $147/month and Professional is $297/month (both billed monthly). Enterprise is contact sales. Annual billing can be switched on, but confirm the amount on the official page. Business usage rates include local calls at $0.055/minute, local numbers at $3/month, transcription at $0.04/minute, Call Analysis at $0.05/call, and Voice Agents at $0.05/minute. Professional lowers many of the rates. Summaries, sentiment analysis, and conversion detection may incur additional costs. TCPA Shield® is a paid add-on on all plans.

Best for: Pay-per-call operators and advertisers that need call routing, real-time bidding, and buyer matching, with English-language, non-Japan operations.

9. Retreaver

Retreaver is a call tracking and call routing platform for pay-per-call businesses and advertisers. It measures calls from ads and publishers and routes them to matching buyers. Features include real-time bidding (RTB), per-buyer cap settings, and TCPA/DNC protection.

It is presented for industries such as insurance, home services, legal, and healthcare. Its AI Analyst determines call intent and outcomes.

• Strengths: There is no monthly fee or long-term contract, so you pay only for what you use. There is no extra charge for real-time bidding, and calls that do not connect are not charged.
• Strengths: AI Analyst shows call intent with supporting quotes, outcomes such as a booking or sale, and a confidence score. You can enable it per campaign, publisher, or buyer, and set hourly, daily, and monthly caps.
• Strengths: The MCP server lets you operate your account from Claude, ChatGPT, and Cursor. An iPhone and iPad app shows the dashboard, call logs, and recordings.
• Things to note: The AI Analyst unit price is not published. The AI voice agent and in-app AI chat are still marked "Coming soon."
• Things to note: Japanese numbers and Japanese language support cannot be confirmed on the official website. No free plan or free trial is stated.

Pricing: According to the pricing guide in the official help as of November 7, 2026, pricing is usage-based with no monthly fee or long-term contract. Calls are from $0.05/minute, and phone numbers are $1/number/month. The AI Analyst is charged by minutes transcribed, but the unit price is not published. For high volume, you can ask support to review the unit price.

Best for: Pay-per-call businesses and advertisers that prefer usage-only pricing and want AI review of call intent and outcomes in US and Canada operations.

10. CallScaler

CallScaler is a low-cost call tracking tool with local numbers from $0.50/month. It includes DNI, keyword tracking, visual call flows, spam blocking, and form and SMS tracking. It offers two plans: Call Tracking for agencies, lead generation businesses, and local businesses, and Pay Per Call for running your own pay-per-call network.

Joining the marketplace where you can buy and sell calls is free.

• Strengths: Local numbers are $0.50/month, and AI summaries have no extra AI charge. Number porting from other providers is supported for free.
• Strengths: AI Watchdog lets you monitor calls by describing conditions in plain language. AI Lead Scoring scores calls from 0 to 100 and can send them to Google Ads as conversions.
• Strengths: There is a 14-day free trial and a 30-day money-back guarantee. MCP support lets you work with calls from AI assistants such as Claude and ChatGPT.
• Things to note: Numbers are US local numbers and North American toll-free numbers, so you cannot track calls with Japanese numbers. Transcription and AI summaries are available only in English and Spanish.
• Things to note: Monthly billing is higher than annual. Call Tracking is $95/month billed monthly.

Pricing: According to the official pricing page as of November 7, 2026, Call Tracking is $65/month billed annually ($95/month billed monthly). Pay Per Call is $400/month billed annually ($600/month billed monthly). Usage-based charges are added to both. Local numbers are $0.50/month, toll-free numbers are $2.00/month, local calls are $0.045/minute, and AI transcription is $0.006 per 15 seconds. AI Watchdog is $35/month + $0.005 per call reviewed. Call Tracking add-ons include unlimited users and businesses at +$95/month, white label at +$65/month, and real-time bidding at +$65/month.

Best for: Agencies, local businesses, and pay-per-call operators advertising in the US who want low number costs and AI summaries in English or Spanish.

Recommendations by Goal

Goal	Recommended	Why
Start with a free plan or trial	Nimbata, CallRail	Nimbata has a $0/month Entry plan and a 14-day free trial, and CallRail offers a 14-day free trial with no credit card.
Track calls with Japan numbers	CTM (formerly CallTrackingMetrics), WhatConverts	Both show Japan (+81) numbers on their official pricing pages, though CTM lists only toll-free numbers for the current plans.
Analyze Japanese-language calls	Convirza	Its official knowledge base says transcription and conversation analytics support 36 languages including Japanese.
Enterprise scale and compliance	Invoca, Marchex	Invoca targets large and mid-sized B2C companies and states SOC 2 Type 2 and HIPAA (BAA), while Marchex offers industry-specific conversation intelligence.
Pay-per-call buying and selling	Ringba, Retreaver	Both offer call routing and real-time bidding for pay-per-call operators.
Low-cost start for US advertising	CallScaler, WhatConverts	CallScaler has local numbers from $0.50/month, and WhatConverts plans start at $30/month.
Agency with multiple clients	WhatConverts, Nimbata	WhatConverts has agency plans with unlimited accounts, and Nimbata has an Agency plan at $149/month.
Integrations with existing systems	CallRail, CTM (formerly CallTrackingMetrics)	CallRail lists more than 50 integrations, and CTM lists Google Ads, HubSpot, Salesforce, and an API.

Most tools here are English-first, so test your own call language and number needs during a trial or demo. Confirm contract terms and current prices on each official website before deciding.

How to Choose Without Regrets

Start with the pricing model, not the monthly fee

These tools bill in very different ways, so the headline price can mislead. CallRail lists plans from $50/month billed annually, but adds usage charges for numbers, minutes, and SMS. CTM (formerly CallTrackingMetrics) does not include numbers or call minutes in its plans, so those are billed separately.

Nimbata charges per answered call rather than call duration, which can make long calls easier to predict. Convirza bills each AI feature per minute, so costs can rise with call volume. Estimate your monthly calls first, then compare total cost.

Check for a free plan or trial before you commit

Several tools let you test before paying. CallRail, WhatConverts, and Nimbata offer a 14-day free trial, and CallScaler adds a 30-day money-back guarantee. Nimbata also has a $0/month Entry plan, and Convirza has a $0/month API plan.

Invoca and Marchex do not state a free plan or trial. Invoca uses quote-based annual contracts, and Marchex asks you to request a demo. Plan extra time for sales conversations if you choose either.

Confirm Japanese support in detail

"Japanese support" covers three separate questions: phone numbers, transcription, and AI output. CallRail transcribes 17 languages including Japanese, but summaries come back in English, and you cannot buy +81 numbers. WhatConverts offers Japan local numbers at $10.00 per additional number, but Japanese is not among its transcription languages.

Convirza states that transcription and analytics support 36 languages including Japanese, but Japan numbers are not mentioned on its pricing page. Invoca, Marchex, and CallScaler show no Japanese support. Test with real Japanese calls where you can. Check the official website for the latest pricing and features.

Match the tool to your business type

Invoca is aimed at large and mid-sized B2C companies, so it may be more than a small business with low call volume needs. CallRail, WhatConverts, and Nimbata cover small businesses and agencies, with agency plans available on each. CallScaler is a lower-cost option, but it is limited to US and North American numbers.

Ringba and Retreaver are built for pay-per-call operators who buy and sell calls. Their features, such as real-time bidding and call routing to buyers, matter less if you only need ad attribution.

Look at platforms and AI scope

Most tools run on the web and offer an API. Retreaver has an iPhone and iPad app, and CallRail has iOS and Android apps. Nimbata, Convirza, Retreaver, and CallScaler also connect to AI assistants such as Claude through an MCP server.

AI scope varies too. WhatConverts limits AI Lead Analysis to its Elite plan. CallRail includes Premium Conversation Intelligence™ from Lead Conversion up. Decide which AI features you need, then confirm which plan includes them.

FAQ

Q. Which AI call tracking tools offer a free plan or trial?

A. CallRail, WhatConverts, Nimbata, and CallScaler list a 14-day free trial. Nimbata also has an Entry plan at $0/month plus usage, and Convirza's API has a Free plan at $0/month. Invoca and Marchex do not state a free plan or trial.

Q. How much do the main tools cost?

A. CallRail starts at $50/month billed annually ($55/month billed monthly). WhatConverts starts at $30/month, Nimbata Pro is $39/month, and CTM Marketing Lite is $79/month billed monthly. CallScaler Call Tracking is $65/month billed annually. Invoca and Marchex do not publish prices, and usage charges are added for most tools.

Q. Can I use these tools in Japan?

A. It depends on the tool. WhatConverts lists Japan local numbers at $10.00 per additional number. Nimbata lists Japan local numbers at $13.30 to $38.00/month, and CTM lists Japanese toll-free numbers at $56/month. CallRail, Invoca, Marchex, and CallScaler do not offer Japan numbers or do not mention them.

Q. Which tools can analyze Japanese calls?

A. Convirza's official knowledge base says transcription and conversation analytics support 36 languages including Japanese. CallRail transcribes Japanese, but its summaries are returned in English. WhatConverts does not include Japanese in its transcription languages, and CTM does not publish a language list.

Q. Which tools are for pay-per-call businesses?

A. Ringba and Retreaver are built for pay-per-call operators and advertisers, with real-time bidding and call routing. CallScaler also offers a Pay Per Call plan at $400/month billed annually ($600/month billed monthly). Ringba Business is $147/month, and Retreaver is usage-based with calls from $0.05/minute.

Summary

The ten tools differ most in pricing model, free options, and Japanese support. CallRail, CTM (formerly CallTrackingMetrics), WhatConverts, Nimbata, and CallScaler publish prices. Invoca and Marchex require a quote or demo, and Retreaver is usage-only.

Japan numbers are available from WhatConverts, Nimbata, and CTM, with limits. Convirza states Japanese transcription support, but Japan numbers are not mentioned. Check each vendor's official website for the latest pricing and features.

• Want to start free → Nimbata ($0/month Entry plan and a 14-day free trial)
• Need Japan numbers → WhatConverts (Japan local numbers at $10.00 per additional number)
• Running a large North American operation → Invoca (quote-based, with stated compliance certifications)

View all AI marketing tools (12 items)