CTM (CallTrackingMetrics) vs Quo (formerly OpenPhone)
An independent, review-free comparison compiled by the SaaSTracker editorial team. Both products are profiled in full, and neither can pay for placement here.
The short answer
Editorial assessmentCTM (CallTrackingMetrics) compared with Quo (formerly OpenPhone)
Quo (formerly OpenPhone) is a business phone system at $15 to $35 a seat with a shared inbox, texting, and CRM logging. It can tell you a call happened; it has no idea which ad caused it. CTM answers that question and can also handle the call, but it lacks Quo's shared-inbox collaboration, per-user numbers, and general phone-system behaviour. A marketing-led small business commonly runs both, with CTM in front attributing and Quo behind it as the team's phone.
Choose CTM (CallTrackingMetrics) if
Marketing agencies managing call-driven local clients, and small to mid-sized businesses where the phone is both the conversion event and the sales channel: home services, healthcare, legal, automotive, education, and any operation that advertises to generate calls and then needs a team to work them.
Choose Quo (formerly OpenPhone) if
Small businesses, agencies, trades, and founder-led sales teams who need a shared work number with texting, light routing, and CRM logging, and who make dozens of calls a day rather than hundreds. Anyone who wants a business phone that costs less than a lunch per seat and can be live in an afternoon.
Side by side
13 attributes| Attribute | CTM (CallTrackingMetrics) | Quo (formerly OpenPhone) |
|---|---|---|
| Category | Calling | Calling |
| Starting price | $79 per month monthly, $65 on annual billing, or $60 on a two-year term (free trial) | $15 per user per month billed annually ($19 monthly) (7 days trial) |
| Pricing model | Flat monthly plan with unlimited tracking sources and unlimited users on every tier, discounted on annual and two-year terms, with usage charged separately: minutes, numbers, transcription beyond included pools, AI activities, and chats, plus optional agent bundles and volume discount packs. | Per-user per-month subscription with a number included in every seat, unlimited US and Canada calling and messaging on all tiers, and usage-based charges only for international calling, extra numbers, automated SMS, and AI credits. |
| Free plan | No | No |
| Free trial | First month at $0 plan fees (usage still billed) | 7 days |
| Best for | Marketing agencies managing call-driven local clients, and small to mid-sized businesses where the phone is both the conversion event and the sales channel: home services, healthcare, legal, automotive, education, and any operation that advertises to generate calls and then needs a team to work them. | Small businesses, agencies, trades, and founder-led sales teams who need a shared work number with texting, light routing, and CRM logging, and who make dozens of calls a day rather than hundreds. Anyone who wants a business phone that costs less than a lunch per seat and can be live in an afternoon. |
| Setup time | A day for a basic deployment: install the tracking script, provision a number pool, build a call flow, and connect Google Ads. Agencies setting up sub-accounts, white-label domains, and per-client reporting should budget a week for the first client and an hour for each thereafter. CTM cites one to two hours of standard onboarding, which is realistic for a single simple account. | Under an hour for a solo user and about half a day for a small team. Choose a number, install the apps, set business hours and a ring group, and you are live. Number porting takes longer, typically one to two weeks, and runs in parallel while you use a temporary number. |
| Learning curve | Moderate and higher than a pure attribution tool, because there is more product here. Call flows, routing rules, agent configuration, AI prompts, and reporting each take learning, and the interface carries fifteen years of features. The payoff is that a competent administrator can express routing logic that simpler tools cannot. | Near zero. The interface is a messaging app with a keypad, and staff who have never used a business phone system understand it without training. The only genuinely unfamiliar concept is A2P 10DLC registration, which the product walks you through. |
| Platforms | Web application, Browser-based softphone, JavaScript tracking script, iOS and Android apps, REST API | iOS, Android, macOS desktop app, Windows desktop app, Web app, Chrome extension |
| Compliance | HIPAA compliance available from the Marketing Pro tier, GDPR, SOC 2, PCI considerations for payment-adjacent call handling, Configurable call recording notifications for consent jurisdictions, 10DLC registration required for US business texting | SOC 2, GDPR, A2P 10DLC carrier registration handled in-product, STIR/SHAKEN attestation on outbound US calls |
| Founded | 2011 | 2018 |
| Headquarters | Baltimore, Maryland, United States | San Francisco, California, United States (remote-first) |
| Ownership | Bootstrapped and 100 percent owned by its founders | Venture-backed |
Strengths and limitations
CTM (CallTrackingMetrics)
Strengths
- Dynamic number insertion, keyword-level attribution, and multi-touch attribution are included on every tier rather than gated behind an upgrade, which is genuinely more generous than most of the category.
- Unlimited users and unlimited tracking sources on all plans, so team size and campaign count never force a tier change.
- It does two jobs in one product: marketing attribution and a working call handling layer with a browser softphone, IVR, routing, scripts, and on Sales Engage a smart dialer.
- AskAI runs your own custom prompts over conversations rather than a fixed model, and can trigger actions automatically when it flags a high-value call, which turns analysis into workflow.
Limitations
- The entry price of $79 monthly is more than double WhatConverts' $30, which is hard to justify for a very small business that only wants attribution.
- The plan fee is a floor rather than a total: minutes, numbers, transcription overage, AI activities, chats, and agent bundles from $99 all sit on top, and modelling the real bill takes effort.
- Roughly 40 integrations is a narrow list next to competitors advertising hundreds, and some obvious ones (HubSpot on Pro, Salesforce on Sales Engage) sit behind tier gates.
- HIPAA requires the $179 Marketing Pro tier, which is a real step for a small practice that only needs basic attribution with recording.
Quo (formerly OpenPhone)
Strengths
- The shared-number inbox with internal comments and assignment is the single best small-team phone experience on the market and is why the product spreads by word of mouth.
- A phone number is included in every seat, unlimited US and Canada calling is on the cheapest tier, and there is no seat minimum, so the entry cost is genuinely $15.
- API access on every plan including Starter, which most competitors reserve for their top tier or a custom contract.
- Setup is measured in minutes, not days: pick a number, install apps, invite the team. No PBX concepts, no dial plans, no reseller.
Limitations
- No dialer of any kind: no power dialing, no parallel lines, no answering machine detection, no local presence rotation. For a real outbound motion this is disqualifying.
- Unlimited calling stops at the US and Canadian border, and international is metered, which makes cost modelling awkward for anyone selling across regions.
- Call recording, CRM logging, and phone menus are all gated behind the Business tier, so the advertised $15 entry price is not the price most buyers actually pay.
- The Scale tier at $35 mostly buys support and call tags. The value curve flattens hard after Business.
Pricing compared
CTM (CallTrackingMetrics)
Flat monthly plan with unlimited tracking sources and unlimited users on every tier, discounted on annual and two-year terms, with usage charged separately: minutes, numbers, transcription beyond included pools, AI activities, and chats, plus optional agent bundles and volume discount packs.
- Marketing Lite$79 monthly / $65 annual / $60 two-year
- Marketing Pro$179 monthly / $149 annual / $135 two-year
- Sales Engage$329 monthly / $274 annual / $247 two-year
- Enterprise$1,999
CTM's value depends entirely on whether you use both halves of it. Bought purely as attribution, $65 a month annually is more than double WhatConverts' $30 entry price for a broadly similar answer, and the case is thin. Bought as attribution plus a calling platform, the arithmetic changes sharply, because unlimited users means a five-person intake team on Sales Engage at $274 annually costs the same as one person, where a per-seat competitor plus a separate call tracking product would run well past that. The genuinely strong tiers are Marketing Pro for agencies at $149 annually, where sub-accounts, white labelling, HIPAA, the API, and 3,000 transcribed minutes per sub-account arrive together, and Sales Engage for businesses that want their phone team living inside the attribution platform. Note that the standard three-person team making 100 calls a day scenario mostly does not apply: CTM's smart dialer exists but this is an inbound-first product, and 6,300 outbound calls a month would be worked through agent bundles at $99 a seat plus per-minute usage rather than through a seat price with unlimited minutes.
Quo (formerly OpenPhone)
Per-user per-month subscription with a number included in every seat, unlimited US and Canada calling and messaging on all tiers, and usage-based charges only for international calling, extra numbers, automated SMS, and AI credits.
- Starter$15
- Business$23
- Scale$35
At $23 a seat for recording, transcripts, AI summaries, and CRM write-back, Business is the best price-to-capability ratio in small-business phone, and the fact that a number is included rather than billed separately quietly saves another few dollars a seat against Aircall or CloudTalk. The value case collapses only in two places: heavy international traffic, which is metered, and outbound dialing, which does not exist here at all. Judged as a phone system for a company under 30 people, it is underpriced. Judged as a sales dialer, it is not competing.
Editorial verdict on each
CTM (CallTrackingMetrics)
CTM is the call tracking product for businesses and agencies that want the attribution and the phone team in the same place. Dynamic number insertion, keyword attribution, and multi-touch reporting are included on the $65 entry tier rather than gated behind an upgrade, unlimited users on every plan means team size never changes the price, and the routing, softphone, scripts, and Sales Engage smart dialer make it a working call handling platform rather than a reporting layer. Marketing Pro at $149 annually is the agency sweet spot, with sub-accounts, white labelling, HIPAA, the API, and a real transcription pool. The reservations are equally clear: the $79 monthly entry price is more than double WhatConverts' for a broadly similar attribution answer, the plan fee is a floor with agent bundles and metered AI on top, the integration list is narrower than rivals advertise, and it is not a substitute for a business phone system. Buy CTM if your phone team should live inside your attribution tool. Buy WhatConverts if you only want to know which ad produced the call.
Read the full CTM (CallTrackingMetrics) profileQuo (formerly OpenPhone)
Quo is the best small-business phone system you can buy for the money, and it is not an outbound sales tool. The shared-number inbox, the included number in every seat, the absence of a seat minimum, and API access on the cheapest plan add up to a product that a two-person company can adopt in an afternoon and never think about again. Business at $23 with recording, transcripts, AI summaries, and HubSpot or Salesforce write-back is the tier to buy. What you do not get is any dialer, any local presence rotation, any spam remediation, or unlimited calling beyond North America, and those absences are the whole difference between this category's phone systems and its dialers. If your reps work lists, buy Kixie or PhoneBurner. If customers call you and you call them back, buy Quo and stop shopping.
Read the full Quo (formerly OpenPhone) profileCTM (CallTrackingMetrics) profile last reviewed 2026-08-22; Quo (formerly OpenPhone) last reviewed 2026-08-22. Pricing is compiled from public sources and can change without notice. See our methodology.