Voluum vs Cometly

If you are down to Voluum and Cometly, the first thing worth saying is that these two rarely measure the same funnel. Both promise numbers you can trust more than the ad account's own ROAS, and both catch conversions server-side rather than leaning on a browser pixel. But Voluum is a cloud click tracker built for the buyer pushing volume through affiliate and native offers, and Cometly is a revenue attribution platform built for B2B SaaS, where the money is a subscription in Stripe and a deal in a CRM. The reader stuck between them is really deciding what they sell.

Voluum stamps every click, catches the conversion server-side, fires postbacks to your networks, and tells you which source, lander and offer made money, all from a managed cloud dashboard you never have to host. Cometly runs its Comet Pixel and server-side events to feed Stripe revenue and CRM deal stages into the attribution, so you see which ads produced pipeline and closed-won revenue, with MRR and LTV attached. Voluum follows a click to a fast conversion on an offer. Cometly follows a lead through a sales pipeline to a signed subscription. Knowing which of those describes your business settles most of this comparison before you read a feature list.

The one question that decides it: what you buy traffic for

Answer this before you compare a single feature. Do you buy media to send clicks to offers, landers and affiliate campaigns, and need to know which source and creative actually turned a profit? Or do you run ads to grow a software business, where a click becomes a trial, a trial becomes a deal in a CRM, and the deal becomes recurring revenue in Stripe weeks later? If your problem is click-level ROI at volume across offers on domains you may not even own, that is Voluum's problem to solve. If your problem is knowing which ad set turned into a paid account and getting that signal into HubSpot or Salesforce and back to the ad platforms, that is what Cometly is for.

The revenue model decides it. Voluum assumes a funnel whose payoff is a conversion it can attribute to a click, and its whole machinery, the redirects, the postbacks, the anti-fraud and the traffic rules, is tuned for that job at scale. Cometly assumes a subscription and a sales-assisted motion, which is why it writes the full pre- and post-form touch history onto each deal and runs first, last, linear, U-shaped and data-driven models across a long journey. Send a high-volume affiliate campaign through Cometly and you pay a subscription-revenue tool by the pageview for a job it was not built for. Put a B2B closed-won question into Voluum and there is no pipeline for it to read.

Voluum: proven, fast and documented for volume

Voluum is the tracker most affiliates learned on, and that history is its real advantage. For Meta and native campaigns it is the default answer in nearly every thread, which means every traffic source, offer type and integration you might need has already been documented by someone before you. When something breaks at 2am, that matters, and it is why this site ranks Voluum second among trackers. The Voluum review covers where it earns its price.

Speed and reliability also count in its favour. Redirects are fast and hold up at volume, reporting keeps pace, and anti-fraud and traffic-distribution rules are built in. Because it is a managed cloud product there is no server to run and no uptime to own, which is the opposite of a self-hosted tracker's trade. For a buyer whose income rides on the tracker never being the bottleneck, that reliability is what they pay for.

Where Voluum hurts is the invoice. It is the most expensive mainstream tracker, its plans are sized by event count with overages billed on top, and a traffic spike is hard to predict on the bill. For simple, low-volume funnels a cheaper cloud tracker does the same core job. Its reports stop at the conversion, so a subscription that renews for two years shows up as one sale.

Cometly: ad spend tied to Stripe and CRM revenue

Cometly does a narrower and, for SaaS, more useful thing: it ties ad spend to money that actually arrived. Its Comet Pixel and server-side events feed Stripe revenue and CRM deal stages into the attribution, so the source of each closed-won deal is visible, with MRR and LTV attached, instead of trusting Meta to grade its own homework. It runs first, last, linear, U-shaped and data-driven models across a long journey, and it sends deal-stage-aware events back to Meta, Google, LinkedIn, TikTok, Microsoft, Reddit and Snapchat through a server-side conversion API on both plans. Its G2 record is strong and consistent, 4.8 out of 5 across 36 reviews, with praise clustering on tracking accuracy and fast, human support. The Cometly review walks through the setup and the sentiment in detail.

Cometly's weak spot is the buying process. It publishes no price and offers no free trial: the Core and Enterprise plans are quoted by sales, usage-based on your monthly pageviews, and you commit, or at least pay for onboarding, before you see it run on your own traffic. Some buyers report the quote feels high. Outside its solid but small G2 record the proof thins out, with Trustpilot at 3.6 and no clear Capterra listing, so make the live demo prove the tracking on your real numbers.

Two companies, two questions

Voluum answers which click, source and offer turned a profit, for a buyer sending paid traffic to campaigns at volume. Cometly answers which ad set brought in a new subscriber, for a SaaS business whose revenue lands in Stripe and whose deal lives in a CRM. Point a solo affiliate at Cometly and they get a subscription-revenue engine with no recurring revenue to measure and a pageview meter on traffic it was not priced for. Point a B2B SaaS founder's sales pipeline at Voluum and they get fast click tracking but no way to tie a weeks-long deal to the ad that seeded it.

So the tie-break is your operation. If you buy media to offers and need click-level ROI you can trust at volume, the SaaS-first attribution tool was never going to serve you. If you sell software or a subscription and need a long sale tied to the deal in your CRM with MRR attached, the affiliate click tracker is aimed at a different funnel.

Where the pricing diverges

The two do not price the same way, and that itself tells you who each is for. Voluum publishes its plans, sized by monthly events with overages charged above your tier, so you can read the page and estimate your bill from your event count. Cometly publishes nothing: Cometly's Core and Enterprise plans are quoted by its sales team and metered on your monthly pageviews, with nothing to trial first. There is no shared axis to line the two up on.

Voluum's metered price is the cost of a proven, fast tracker at volume, and a spike bills into overage, so price it against your real monthly event count before you sign the yearly plan. For Cometly, push for a written quote against your actual monthly pageviews, because usage-based pricing climbs quietly as your traffic grows, and ask what the paid onboarding includes before you commit.

A third path if you host the funnel yourself

A SaaS team selling a self-serve plan, or a buyer running their own offer rather than someone else's, can keep pages, checkout and reporting on one record instead of joining two tools. ElasticFunnels is a funnel platform for teams running paid traffic: it builds the pages, hosts the checkout, and reports ad spend against conversions on the same data layer as the CRM and the sale. A purchase in its checkout is recorded first-hand, with subscriptions and renewals on the same customer timeline, which is the part of Cometly's job a self-serve product needs. It fires server-side postbacks to affiliate networks on purchase, refund, chargeback and renewal, the job you would otherwise wire into Voluum, and it split-tests page variants under one campaign URL so a test never resets the ad platform's learning. It starts with a 14-day free trial that takes no card, on plans from $97 a month, plus 0.5% of revenue processed through its hosted checkout and nothing on sales run through outside networks.

The catch is its age. ElasticFunnels is newer than either tool here and has very little independent review coverage, so until you run real volume through it you are taking the vendor's word on its attribution and postbacks. That is expected of a platform this recent, next to Voluum's years of public setups and Cometly's G2 record, and the no-card trial lets you check the reporting on live traffic. It reports on the funnels it hosts, so clicks to offers on other people's domains still need Voluum, and a sales-led deal that closes in a separate CRM still needs Cometly.

Which one for you

You buy affiliate or native paid traffic at volume: Voluum. A proven, well-documented ecosystem, fast redirects at volume and built-in anti-fraud are exactly what a buyer whose income rides on the tracker wants, and the managed cloud means no server to own. Budget for a price that climbs with your events.

You sell B2B SaaS or a subscription and need ad spend tied to revenue: Cometly. Stripe and CRM revenue attribution, long-journey multi-touch models and server-side conversion feeds to seven ad platforms are the right fit, as long as you can commit without a public price and you make the demo prove the tracking on your own numbers.

You host your own pages and checkout end to end: look at ElasticFunnels alongside them, with the newness caveat above in mind, and keep Voluum for any click traffic that closes off your own domains.

Voluum is our default pick here because more readers who reach this comparison buy media to affiliate offers than sell B2B software. That reflects who reads this site, and says nothing about build quality. For a SaaS team tying ad spend to Stripe revenue and a CRM pipeline, Cometly is plainly the better tool, and we would pick it every time over a click tracker that never sees a renewal. We rank Voluum second in our ad tracker ranking for the volume affiliate. If you want to weigh Voluum against a self-hosted tracker instead, our Voluum vs Binom page does that, and if you are actually choosing attribution for a software business, ClickFlare vs Cometly sets Cometly against a full cloud tracker. The full field sits in our head-to-heads.