8 Free Call Tracking Tools to Engage Prospects

I evaluated 20+ free call tracking tools using G2 Data and reviews to finalize the 8 best free call tracking software options for 2027. These are CallRail, Call Tracker, CallTrackingMetrics (CTM), Clear Ring, Nimbata, Retreaver, Ringostat, and WhatConverts.

Missing a call is the one marketing mistake you can't A/B test your way out of. You paid for the click, the keyword, or the ad; the phone rang because of something you did, and if nobody can say what, that spend is a black box.

Free call tracking software closes that gap without a budget line. The real skill isn't finding a tool with "call tracking" in the name, it's knowing exactly where each free plan or trial stops: how many numbers you get, how many minutes you get before the meter starts, and whether "free" means a countdown clock or an honest floor. That's what this list breaks down, tool by tool, with the exact numbers and where they came from.

Comparison of the best free call tracking software

Data is point-in-time as of November 2026. All pricing reflects publicly available data at the time of writing and is subject to change.

*Clear Ring bills in GBP; the USD figure above is converted at the GBP/USD mid-market rate on November 12, 2026 (1 GBP = 1.33 USD) and will drift from the live rate over time.

Missed calls aren't a rounding error. Across 10 industries, only 56% of calls to businesses are answered by a person, which means 44% of inbound calls go unanswered, meaning a significant share of the marketing spend driving those calls may never reach a live conversation, according to Invoca's Lead Conversion Benchmarks Report 2026. A free call-tracking setup that actually attributes those calls to the campaign that drove them isn't a compromise; it's the cheapest fix for a leak that size.

What I look for in a free call tracking tool

Evaluating eight call tracking tools back to back makes certain things obvious that a feature list never will. Here's what I actually paid attention to:

• Exactly what's free. I specifically looked for the free features, differentiating them from the limited ones, by paying attention to the actual number of tracking numbers, minutes, users, and days each trial lasts.
• Free-forever vs. trial. I checked whether the free tier ever expires, and if it doesn't, what actually meters the cost once you're live.
• Where it stops. I looked for the specific cap, whether a day count or a usage number, that forces the upgrade decision, not a vague "until you need more."
• Attribution depth. I checked whether dynamic number insertion and multi-channel attribution ship free or sit behind a paid tier.
• Usable without an analyst. I weighed whether a small team could set up numbers and read the reports on their own, without hiring outside help.
• AI features that earn their place. I looked for transcription, call scoring, or summaries that save real time, not just a feature checkbox.

To qualify for G2's Inbound Call Tracking Software category, products must:

• Generate unique tracking phone numbers for different marketing campaigns
• Attribute incoming calls and texts to individual ads, campaigns, or keywords
• Record and monitor all inbound calls for each tracking number
• Provide real-time analytics, conversational intelligence, and call reporting
• Integrate with marketing or sales platforms to gather insights on leads and conversion data

1. CallRail: Best for proven, most-reviewed call attribution

I picked CallRail as the most-reviewed inbound call tracking platform on G2; its free trial is built around the same core workflow the paid plans scale up: unique numbers, call recording, and campaign-level attribution.

The 14-day trial needs no credit card and includes 5 local numbers with 250 minutes of talk time (transcription included), call recording, routing, and automation rules; 25 SMS messages a month become available once you're on a paid plan. Once the trial ends, Lead Tracking starts at $50/mo, and usage past the included minutes runs $0.06/min.

The G2 Data backs up why CallRail is the default reference point for this category: it isn't just the most-reviewed tool here by a wide margin, that large review base also backs the highest G2 Score of anything in this list (92 out of 100, Leader tier) and a 91% likelihood-to-recommend score, so the volume and the sentiment behind it point the same direction.

Where CallRail genuinely stands out:

• A clean, intuitive interface for managing numbers, recordings, and campaign performance comes up again and again in CallRail's reviews, several separately describing onboarding itself as straightforward, not just the day-to-day use.
• AI-generated call summaries and transcripts are the other recurring favorite: multiple reviewers say they can verify lead quality or prep a callback just from the transcript, without listening to the full recording.

What G2 users like about CallRail:

"What I like best about CallRail is how easy it is to implement while still providing enterprise-level call tracking and attribution. The UI is clean and intuitive, making it simple to manage tracking numbers, review recordings, and analyze call performance across multiple campaigns."

- CallRail review, Pavlo P.

What I dislike about CallRail:

• I've seen reviewers note you can only filter calls and forms to a condition, not out of one, a real gap if you run regular attribution cleanup and need to exclude sources from a report, less of an issue if your reporting stays additive.
• Overages add up once you're past the trial's 5 numbers or 250 minutes, $3/number and $0.06/min, fine for light trial usage, but heavier campaigns should budget for it.

What G2 users dislike about CallRail:

"The number one thing I dislike about CallRail is the inability to filter OUT when looking at calls or forms; you can only filter TO things. I want to be able to use filters to exclude lead sources."

- CallRail review, Nathan C.

2. Call Tracker: Best for agencies that want white-label branding without an expensive tier to unlock it

I added Call Tracker to this list as a straightforward inbound call tracking platform built for agencies that want to resell tracking and reporting under their own brand, without white-label access sitting behind a premium tier.

Every plan comes with a 14-day risk-free trial, no credit card required, just a company name, your name, and an email address (or a Google sign-in) to get started. Starter runs $37/mo once the trial ends, and includes 10 local numbers, 500 local minutes, and 100 texts, with usage-based add-ons for extra numbers, minutes, texts, and transcription beyond that.

What sets Call Tracker apart in this lineup is what's already included rather than upsold: white-label custom branding and the ability to manage multiple company accounts under one login ship standard on every tier, not gated behind an enterprise-priced plan. Call Tracker's G2 footprint is small (21 reviews), and its most recent review dates to September 2023, so its 4.7/5 rating reflects sentiment from that point rather than more recent usage, worth knowing going in.

Where Call Tracker genuinely stands out:

• White-label branding and multi-company account management ship on every tier as standard features, not locked behind an enterprise plan the way white-labeling is gated on some competitors, a real differentiator for an agency reselling tracking to multiple clients.
• Pricing is transparent and usage-based on top of a flat included allotment, published openly on the pricing page, so an agency can estimate a client's monthly cost from the rate card alone, without a sales call.

What G2 users like about Call Tracker:

"It provides detailed insights into the effectiveness of marketing campaigns in generating phone calls and this enables businesses to make informed marketing decisions based on the campaign performance data."

- Call Tracker review, Sandeep Jain

What I dislike about Call Tracker:

• Setup and staff training take real time, especially once different numbers are tied to different parts of the organization, more of a factor for larger, multi-department rollouts than a single-location shop.
• There's no free-forever option, just a 14-day trial, fine if you're ready to commit to a plan by day 14, less so if you wanted an indefinite free tier to lean on.

What G2 users dislike about Call Tracker:

"It takes a bit of time to set up and keep up-to-date while utilizing this service. Training staff to understand and manage the system also takes time considering different numbers are tied to the organization."

- Call Tracker review, Verified User in Marketing and Advertising

3. CallTrackingMetrics (CTM): Best for unlimited users on a $0 first month

I looked at CallTrackingMetrics, now rebranded CTM, as a platform that pairs call tracking with a full softphone and routing suite, built for teams that want marketing attribution and inbound sales handling in one place.

CTM's current offer isn't a trial in the traditional sense: it's $0 in plan fees for your first month on Marketing Lite, and that plan itself has no user or tracking-source limit, unlimited users and unlimited tracking sources, even at the entry tier. The catch is usage: transcription bills at $0.02/minute from day one, with no included free minutes on Lite (Marketing Pro, the next tier up, bundles 3,000 minutes).

That unlimited-seats structure is unusual for the category, and it shows in the segment data: CTM draws a heavier mid-market base (30% of reviewers) than most of the trial-based tools here, consistent with teams that need more than one or two seats from day one.

Where CTM genuinely stands out:

• Being able to listen to or review calls in real time comes up across multiple reviews as a coaching and accountability tool, letting managers step into a live call, train reps on real conversations, and keep an eye on activity without waiting for a report to run.
• CTM's Salesforce integration draws its own separate praise: reviewers describe call activity showing up directly on contact and lead records, rather than living in a separate tab they have to cross-reference.

What G2 users like about CTM:

"I use CallTrackingMetrics to track and attribute inbound phone calls and form submissions back to specific marketing campaigns, channels, and keywords... What I like most is how clearly it connects marketing activity to real revenue-driving conversations. The attribution and tracking accuracy really stands out... The reporting is also a big plus. The reports are client-friendly and easy to customize, which saves time and helps clearly communicate performance and ROI."

- CTM review, Steven M.

What I dislike about CTM:

• I've seen recent performance lag flagged, needing a refresh to see who's on a current call, plus a hang-up bug that sometimes takes two tries to end a call, workable if you can tolerate the occasional refresh, frustrating for teams running back-to-back calls.
• There are no included minutes on Marketing Lite, so transcription usage costs start immediately even during the free month, a real factor for high-volume teams, less so if you're just testing light.

What G2 users dislike about CTM:

"Performance lately has been quite lackluster with constant lag and needing to refresh to see who is on current calls. Also, hanging up seems to be bugged; you need to do it twice."

- CTM review, Verified User

4. Clear Ring: Best for a straightforward UK trial with minutes bundled in

I included Clear Ring as a UK-based call tracking platform, billed in GBP, for small businesses that want a generous trial with real minutes bundled in rather than a bare feature preview.

The 30-day trial needs no credit card and includes 500 minutes plus 5 local numbers from day one, not a token allowance, with the AI Intelligence Suite included as a limited-time offer during the trial window. After that, Starter runs $161/mo (Clear Ring bills in GBP at £120/mo; converted at the October 26, 2026 exchange rate) for the same 500 included minutes.

Clear Ring's G2 footprint is small (13 reviews), so its Grid placement sits below the category's Leaders, but its perfect 5.0/5 star rating is the highest of any tool in this list. That rating isn't riding on one account: most of Clear Ring's review set circles back to the same point, that it makes clear which specific marketing efforts are actually working.

Where Clear Ring genuinely stands out:

• Several reviewers separately describe the same shift: before Clear Ring, they couldn't say which campaigns were actually working, and after, attribution became evidence for a budget conversation instead of a guess.
• Upgrading doesn't shrink what you get, either: the paid Starter plan carries the same 500 minutes as the trial, so there's no unpleasant surprise waiting on the other side of day 30.

What G2 users like about Clear Ring:

"Clear Ring has driven a remarkable increase in leads, with a 300% uptick attributed to its use. The clarity it provides on marketing efforts is invaluable, offering concrete proof of successful strategies."

- Clear Ring review, Robert B.

What I dislike about Clear Ring:

• I’ve seen G2 reviewers mention wanting stronger data aggregation and trend analysis inside the platform, a gap if you need deeper built-in analytics, less of one if clear campaign attribution is what you’re after.
• Reviewers also note that the range of available reports takes time to fully grasp, more of a factor for first-time users than for teams who only need a few core reports.

What G2 users dislike about Clear Ring:

"I dislike the fact that it consumes a lot of data due to my geo location, so I hope the developers implement that area so it becomes less expensive for customers."

- Clear Ring review, Samuel E.

5. Nimbata: Best for predictable per-call pricing with built-in AI call notes

I added Nimbata to this list as a call-tracking and conversation-analytics platform built for agencies and multi-location businesses that want every call attributed to the exact source, campaign, and keyword that drove it, with AI doing the first pass on every recording.

The 14-day trial needs no credit card and gives you the platform's full feature set to test, not a capped preview, up to 2 tracking numbers and 50 answered calls, including dynamic number insertion, AI call tagging and scoring, and integrations like Google Ads and GA4. When the trial ends, Nimbata asks you to pick a plan and add payment details before you keep going: choosing Entry keeps the account at $0/mo plus usage but drops down to a single call flow with no DNI, while Pro at $39/mo ($35/mo billed annually) keeps unlimited call flows, DNI, AI tagging and scoring, and the Google Ads and GA4 integrations. Form tracking, automations, and most CRM integrations sit higher, on Marketing ($89/mo, or $80 billed annually) and Agency ($149/mo, or $120 billed annually).

Nimbata's G2 footprint is small (29 reviews, Niche tier on the Grid), but what reviews exist point the same direction: responsive support and AI-generated call notes come up again and again, not a one-off compliment.

Where Nimbata genuinely stands out:

• Responsive support is a theme reviewers keep coming back to: several separately describe getting real help fast, not a canned reply or a referral to a help article, including during initial setup.
• AI-generated call notes and transcripts are the other recurring favorite: multiple reviewers describe using them to review conversations and gauge call quality without listening to every recording themselves.

What G2 users like about Nimbata:

"Very simple to use but most importantly the pay-as-you-go option makes it super easy to start ads campaigns without any financial risk attached to them."

- Nimbata review, Valentin M.

What I dislike about Nimbata:

• I've seen pricing flagged as a touch high relative to the feature set, a recurring, mild complaint rather than a dealbreaker for most reviewers.
• Only the Entry plan is free forever, and it caps out at a single call flow with no DNI, fine for light, single-campaign use, but any real multi-campaign work needs Pro or higher.

What G2 users dislike about Nimbata:

"I dislike the pricing of each number, its really expensive and the monthly costs ad up."

- Nimbata review, Joshua

6. Retreaver: Best for a free-forever platform with a published usage estimate

I found Retreaver to be a pay-as-you-go call tracking and routing platform built for marketing and customer service agencies that want caller data flowing straight into their own systems.

Retreaver charges no monthly platform fee at all: its own pricing page states plainly that it "does not charge monthly fees" and is "entirely pay-as-you-go." Signup takes no credit card. At its published per-unit rates of $0.05/minute and $1/number, 200 minutes and 15 numbers works out to roughly $25/mo, though Retreaver itself doesn't publish a flat monthly figure, since billing is usage-only.

Retreaver sits in the High Performers tier for its large satisfaction levels despite its smaller size: a 97% likelihood-to-recommend score and a Net Promoter Score of 93 are among the strongest in this list. Reviewers describe where that satisfaction comes from, several credit Retreaver's team with walking non-technical users through setup step by step rather than leaving them with just documentation, likely a real part of why so many are willing to recommend it.

Where Retreaver genuinely stands out:

• Multiple reviewers describe the team doing more than pointing to documentation: they'll build out a first campaign for a non-technical user and walk through it step by step themselves.
• That responsiveness holds up after onboarding too, reviewers separately describe a quick turnaround on questions and even custom feature requests, not just during the initial setup call.

What G2 users like about Retreaver:

"What really sticks out beyond the tech itself are the people who work there... When other platforms have an outage, retreaver stays up 95% of the time... they don't charge nearly as much as any of their competitors. I have used most major call platforms and our costs with retreaver are 70% less compared to others."

- Retreaver review, Eric G.

What I dislike about Retreaver:

• I've seen requests for an account type with full campaign-building access that doesn't also expose revenue and payout figures to every team member, a real gap for agencies managing tiered client access, a non-issue for a single-team account.
• There's no flat monthly number to budget against, every account is metered usage, which some teams may find harder to forecast than a flat plan.

What G2 users dislike about Retreaver:

"One thing I'd like to see Retreaver do is have an account type that has full access to build out publisher, campaigns, and even buyer profiles... while NOT being able to see revenues, payouts, and profits."

- Retreaver review, Jordan Z.

7. Ringostat: Best for call tracking bundled into a business phone rollout

I looked at Ringostat as a business phone platform with call tracking built in as a module, for teams that want both in one rollout rather than stitching two tools together.

The 14-day trial unlocks every feature across all tiers, so you're evaluating the full product, not a capped preview. One thing to know going in: call tracking itself is priced as a separate $25/mo add-on on top of the base Basic seat price ($17/user/mo billed annually, 3-user minimum, about $51/mo), so the $17 headline isn't call-tracking pricing by itself, and it's only accurate on annual billing.

That structure pays off in the feature data: Ringostat leads this entire lineup on the Tracking category (100% on dynamic number insertion, 97% on multi-channel attribution) and Analytics (100% on call recording), the strongest feature scores of any tool here. Reviewers put that tracking to work in a specific way: several describe using it to spot which ad channels were quietly wasting budget, then reallocating spend once the gap became visible.

Where Ringostat genuinely stands out:

• Fast, responsive technical support comes up across a wide range of Ringostat's reviews, several describe getting a specialist on a question within minutes rather than waiting on a ticket queue.
• The ad-spend theme shows up again here from a different angle: multiple reviewers credit the call-tracking data specifically with uncovering which campaigns were wasting budget, not just with reporting on calls in general.

What G2 users like about Ringostat:

"We liked that Ringostat specialists first learn about the specifics of business. Only then do they recommend tools that truly work. For example, they suggested connecting virtual numbers from countries where our clients call us. This reduced the call cost for them."

- Ringostat review, Maksym V.

What I dislike about Ringostat:

• I've seen the interface described as needing to feel more modern, with some functions buried deep enough in the menu that finding them takes real time, though it reads as a one-time learning cost rather than a lasting problem.
• Call tracking itself is priced as a separate $25/mo add-on on top of the base seat price, workable if you want the broader phone-system bundle anyway, an unwelcome surprise if you came only for call tracking at the $17 headline rate.

What G2 users dislike about Ringostat:

"The interface could be a bit more modern. Some functions are hidden in the depths of the menu, and you need to spend time to find them. But in general, everything is intuitive after the first few days of use."

- Ringostat review, Tetiana B.

8. WhatConverts: Best for lead-quality scoring on every tracked call

I picked WhatConverts for how it tracks calls, forms, chats, and transactions together and scores each one, built for teams that want revenue-level reporting, not just a call log.

The 14-day trial hands you a $30 free usage credit to spend against call and lead tracking, a credit pool rather than a fixed number-of-minutes cap, so how far it stretches depends on your call volume and number count. After the trial, the entry Call Tracking plan runs $30/mo and includes that same $30 usage credit each month, so there's no separate usage bill unless you exceed it.

WhatConverts backs that reporting focus with G2 Data of its own: reviewers separately credit its GA4, Google Ads, and Facebook integrations for making revenue reporting usable end to end, and the product posts the highest quality-of-support score in this list (99%).

Where WhatConverts genuinely stands out:

• Decision-ready reporting is a theme that repeats across WhatConverts' reviews: multiple reviewers separately describe tying leads directly to revenue and allocating marketing budget off that data, not just checking call counts.
• AI-generated call and lead summaries are the other recurring favorite, reviewers describe using them to route leads to the right salesperson or flag opportunities without listening to every recording first.

What G2 users like about WhatConverts:

"It's a complete tracking solution: tracking, attribution, APIs, and, most importantly, integrations with GA4, Google Ads, and Facebook, which make our system a solid tracking stack. When it comes to revenue tracking, the reports and data are exactly what we need for pricing decisions, revenue visibility, and ROI."

- WhatConverts review, Asim N.

What I dislike about WhatConverts:

• I've seen live support flagged as hard to reach in the moment, with the chat widget frequently showing offline, a bigger issue if you need help mid-setup, less so once your tracking is running and stable.
• The $30 trial credit is a shared usage pool rather than a fixed number of minutes, so how far it stretches varies with call volume, harder to budget against than a flat cap.

What G2 users dislike about WhatConverts:

"It's difficult to reach live support. Most of the time, I just see an 'offline chat' status... There are absolutely no AI tools inside the platform."

- WhatConverts review, Luiz Henrique R.

Free call tracking software: frequently asked questions

Got more questions? Here are the answers. 

Q1. What's the best free call tracking software for agencies tracking customer calls and campaign ROI?

Retreaver is worth starting with: it's free-forever with usage-based billing, so there's no trial clock running out mid-engagement, and it posts among the highest satisfaction scores in this list. Retreaver's reviewers specifically credit its team with hands-on campaign setup, useful when an agency is standing up tracking for a new client. For agencies managing several client accounts under one brand, Call Tracker is also worth a look: white-label branding and multi-account management ship standard on every tier, not gated behind a premium plan, though its 14-day trial does have a hard end date. If the agency wants the safest, most-reviewed default instead, CallRail is still the category's proven pick.

Q2. What's the highest-rated free call tracking software for marketing professionals attributing revenue to campaigns?

WhatConverts is built specifically for this: it ties tracked calls to forms, chats, and transactions and scores each one, and G2 reviewers specifically describe using its reports for pricing and revenue decisions, not just call counts. By star rating alone, Clear Ring's perfect 5.0/5 is technically higher, but from a review base a fraction of WhatConverts' size (13 reviews versus 319).

Q3. Do free call tracking trials sacrifice tracking accuracy, or do calls still get dropped?

Free trials don't necessarily sacrifice tracking accuracy, but they can limit attribution depth once the trial ends. Nimbata's 14-day trial includes dynamic number insertion, for instance, while its free Entry plan drops DNI entirely once the trial's over. G2 reviewers across this list consistently credit call-recording and reporting accuracy as strengths on the trials themselves, so check which attribution features stay active on whatever tier you land on, rather than assuming a free tier mirrors the paid product.

Q4. Which free call tracking tools include call recording for quality assurance?

Call recording is included free on Nimbata, CallRail, and CTM's trials. CallRail, Call Tracker and Ringostat also include transcription free during their trials; CTM gates transcription behind a per-minute usage fee even in its free first month, and Ringostat moves transcription to its paid Pro tier entirely.

Q5. Which free call tracking tools attribute revenue directly to specific marketing campaigns?

For this, WhatConverts is the clearest fit: it scores every tracked call, form, and chat against revenue, not just logs that a call happened. CTM and CallRail both attribute calls to the campaign and keyword that drove them too, though neither carries WhatConverts' revenue-scoring layer on top.

Q6. Which free or free-to-start call tracking tools are best suited to high call volume?

Retreaver is usage-billed with no monthly cap to hit, so volume itself never triggers an upgrade the way it does on a trial-based plan. Ringostat posts the strongest call-recording feature score in this list (100%), a metric that matters more as volume climbs, and its full-feature 14-day trial means that reporting depth is there to evaluate from day one, not gated behind a paid tier.

Q7. Which free call tracking tool do agencies trust most for proving ROI to clients?

By G2's Net Promoter Score, Retreaver ranks highest in this list (93), a free-forever platform agencies can use without a trial clock running against a client engagement. WhatConverts' revenue-level reporting is also built specifically to turn tracked calls into the kind of number a client wants to see.

Q8. Which free call tracking tools work across multiple marketing channels?

Multi-channel attribution is where Ringostat posts the strongest feature score in this list (97%), above the category's 92% average. CallRail's free trial includes native integrations across Google Ads, Google Analytics, and Meta, and Nimbata's 14-day trial connects to Google Ads and GA4 too, so channel coverage isn't limited to a single ad platform on either.

Q9. Which free call tracking plans include local number provisioning for multiple locations?

Nimbata is the most direct fit: it’s built for multi-location businesses, and its 14-day trial gives you 2 tracking numbers with full feature access, including call routing, to test one location’s setup before you commit. CallRail's trial includes 5, Clear Ring's includes numbers alongside its 500 bundled minutes, Call Tracker's Starter trial includes 10, and Retreaver lets you add local numbers on demand since it doesn't cap numbers by plan, only by usage.

Q10. Which free call tracking tools integrate with CRM or marketing automation platforms?

CTM connects to Salesforce, reviewers specifically credit it for showing call activity directly on contact and lead records. WhatConverts and CTM both connect to GA4 and Google Ads for the marketing-automation side; Nimbata’s 14-day trial includes all Agency-plan features, so you can test its CRM connections, including Salesforce, HubSpot, Zoho CRM, and Pipedrive, before choosing a plan. After the trial, HubSpot, Zoho CRM, and Pipedrive start on Marketing ($89/mo, or $80 billed annually), and Salesforce is on Agency ($149/mo, or $120 billed annually). None of the other tools in this list name a CRM integration on their free tier.

Ring in the right free tool

Every tool on this list will tell you which campaign made the phone ring; the difference is how long you get to test that for free and what happens the day the meter starts. Start with CallRail if you want the most-reviewed, highest-scoring default, Retreaver if a trial clock is the dealbreaker, or Call Tracker if you need white-label branding included without an upsell. Either way, the exact numbers above, not the marketing copy, are what should decide it.

This was written in 2024 by Shreya Mattoo. It has been updated with new information based on findings from testing and evaluation of the latest list of top G2 products.

For the full-funnel view once a call becomes a lead, see G2's Marketing Analytics Software category.