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, not which brand is better made.

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 campaign produced pipeline and closed-won revenue, with MRR and LTV attached. One follows a click to a fast conversion on an offer; the other follows a lead through a sales pipeline to a paying subscriber. 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 campaign produced a paying subscriber and getting that signal into HubSpot or Salesforce and back to the ad platforms, that is what Cometly is for.

The revenue model is not a detail here, it is the decision. 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. Point a high-volume affiliate campaign at Cometly and you are metering a subscription-revenue tool on a job it was not built for. Put a B2B closed-won question into Voluum and there is no pipeline for it to read. Match the tool to how your revenue arrives and the rest mostly answers itself.

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 are the other reason it wins its segment. Redirects are fast and hold up at volume, reporting keeps pace, and anti-fraud and traffic-distribution rules are built in rather than bolted on. 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 the point.

The cost is financial, not operational. Voluum is the most expensive mainstream tracker: it starts at $119 a month billed annually for 1 million events and climbs to $299 for 5 million, with event overages billed on top, so a traffic spike is hard to predict on the invoice. For simple, low-volume funnels a cheaper cloud tracker does the same core job. And it is a click tracker, not a revenue engine: it tells you which click and offer converted, not which campaign produced a subscription that renews for two years. For an affiliate or native buyer moving real volume, though, that is exactly the right scope.

Cometly: ad spend tied to Stripe and CRM revenue

Cometly does a narrower and, for a software company, 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 you see which campaign produced pipeline and closed-won revenue, 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.

The two real caveats are commercial, not technical. Cometly publishes no price and offers no free trial: the Core and Enterprise plans are quoted on a sales call, 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 the trial you cannot take is exactly the due diligence you would most want. Make the live demo prove the tracking on your real numbers first, because that is the only up-front proof you get.

Different jobs, not a better and a worse tool

Underneath the surface this is not one tool beating another, it is two answers to two different companies. Voluum answers which click, source and offer turned a profit, for a buyer sending paid traffic to campaigns at volume. Cometly answers which campaign produced a paying subscriber, for a software company 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 subscription to read 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 honest tie-break is not a feature checklist, it is your operation. If you buy media to offers and affiliate campaigns 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 numbers: from $119 a month billed annually for 1 million events, $299 for 5 million, with overages charged above your tier, so you can read the plan and estimate your bill from your event count. Cometly publishes nothing. Its Core and Enterprise plans are quoted on a sales call, metered on your monthly pageviews, with no free trial to size them against. There is no shared axis to line the two up on.

Read both on your real situation, not the sticker. Voluum's metered price is the cost of a proven, fast tracker at affiliate and native volume, and it climbs with your events, so a spike bills into the next tier: price it against your real monthly event count before you commit to an annual plan. For Cometly, push for a written quote against your actual monthly pageviews, because usage-based pricing climbs quietly as your traffic grows, and confirm what the paid onboarding includes before you commit. With Cometly the demo is the due diligence, so make it run on your own data.

A third path if you host the funnel yourself

Both of these tools measure a funnel that lives somewhere else. Voluum tracks clicks to landers and offers hosted elsewhere, and Cometly reads revenue out of a Stripe account and a CRM that sit on other platforms. There is a different way to close the same gap, worth naming because it changes where the data lives. ElasticFunnels is a funnel platform for teams running paid traffic that builds the pages and hosts the checkout itself, then keeps its ad-spend and conversion reporting on the same data layer as those pages, the CRM and the sale. Because a purchase closes in a checkout it hosts, that sale is a first-party event it records directly rather than a click it has to match back later, and it keeps a CRM, automations and a call center on that same timeline. It reports ad spend against conversions from that one record and fires server-side postbacks to your affiliate networks on purchase, refund, chargeback and renewal, which is the postback job you would otherwise wire into Voluum for click traffic. It also 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 you run through outside networks.

The honest limit that keeps it on its own line rather than in the table: ElasticFunnels is newer than either tool here, and there is very little independent third-party review coverage to check its claims against, so until you run real volume through it you are largely taking the vendor's word for how its attribution and postbacks hold up. That is what you would expect of a platform this recent, where Voluum has years of public setups and threads to check against and Cometly has a consistent G2 record you can read before you buy. The limit is in the outside proof, not the feature set: the pages, the hosted checkout and the reporting are usable on day one. And that reporting covers the funnels it hosts, so a high-volume affiliate tracking clicks across offers on other people's domains still needs a dedicated tracker like Voluum, and a B2B SaaS team attributing a sales-led motion that closes in a CRM it runs elsewhere still needs a tool like Cometly. It is an option for the seller who runs their own pages and checkout end to end, not a replacement for either.

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 the price, which climbs with your events, and check it against your real monthly volume.

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 or a free trial 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 takes our default pick here, not because it out-attributes Cometly at Cometly's own job, but because more readers who reach this comparison buy affiliate and native media to offers than sell B2B software. That is a statement about who is reading this site, not about which product is better built. On its own turf, a software company 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 with no subscription to read. 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 runs the same fork with a full cloud tracker in Voluum's place. The full field sits in our head-to-heads.