Voluum vs ClickFlare vs RedTrack: Best Native Ads Tracker (2026)

You are spending real money on Taboola or Outbrain in 2026, and a third of your conversions never make it back into your reports. That is what pixel tracking does. Ad blockers eat the fire, Apple's iCloud Private Relay strips the rest, and you optimize a campaign on data that is already a lie.

Pick the wrong tracker and you scale blind. Pick the right one and you get a single source of truth that shows you which creative, which advertorial, and which mobile carrier actually drives the sale. This post breaks down the three trackers worth running on native — Voluum, ClickFlare, and RedTrack — and the server-to-server setup that makes any of them worth the money.

Marcel Sattler, founder of native-advertising.net, has deployed over $100M across Taboola, Outbrain, Newsbreak, MGID, Yahoo Native, Mediago, and RevContent since 2015 — and in every one of those accounts, tracking was the difference between a campaign that scaled and one that quietly bled cash. Tracking is the thing done wrong the most often, so let's get it right.

Why pixel tracking fails on native ads in 2026

Pixel tracking sounds clean on paper. You drop a Google Tag Manager snippet on your site, the pixel fires when a user converts, and the conversion flows back. Easy.

In practice it breaks. Ad blockers stop the pixel from firing. Apple's iCloud Private Relay and the privacy stack baked into every iPhone block it too. The result is the same every time: you fail to track a large slice of your traffic, and lost data means lost information.

When you lose information, you make bad decisions. You cut a winning creative because it looks dead in the reports, or you scale a loser because its losses are invisible. For native specifically — where you are running advertorials, sales pages, and checkout flows in sequence — Marcel does not recommend a pixel setup at all in 2026. The leakage is too high.

Server-to-server tracking: the only reliable method

The fix is S2S — server-to-server tracking. It is the most reliable way to track your metrics because it does not depend on a script firing inside a browser that is actively trying to block it.

Here is how it works. A user clicks your ad on Taboola or Outbrain. At that moment a unique identifier — a hash, an ID — gets generated and attached to the click. That ID is the load-bearing piece of the whole system.

The ID then travels forward through the entire funnel:

• From the traffic source to the advertorial
• From the advertorial to the sales page
• From the sales page to the checkout page
• From the checkout to the thank-you page

When the conversion fires on the thank-you page, that ID gets passed back to the traffic source. Now you know the exact ad, creative, and campaign that produced the purchase. That is the whole point — and it only works end to end. If you run a Shopify store, you track from the Taboola account through the advertorial, through the sales page, all the way to checkout. Break the chain anywhere and the ID dies.

But there is one missing piece in that diagram: the actual server. The traffic source can't generate that hash for you. You need a tool sitting between the click and your funnel to mint the ID and stitch everything together. That tool is your tracker.

Skip the custom-built tracker (unless you're a huge brand)

You have two ways to get that middle layer: build it or buy it.

Building a custom tracker is real. At native-advertising.net we run some custom internal tools we built ourselves, and we invested a lot of money to do it. That path makes sense if you are a huge brand with the budget and the engineering to maintain it.

For everyone else, don't. Building or hiring someone to build a custom solution is too much pain for too little return. You have zero experience with what a tracker actually needs to do, you don't know what's necessary, and you will waste both time and money. Go with a paid software-as-a-service tool instead. That is the recommendation in nearly every case.

Voluum vs ClickFlare vs RedTrack: the three native trackers worth running

Three SaaS trackers lead the field for native. Marcel has tested all three, runs them in real accounts, and recommends all three — they all work. None of them is affiliated with us.

• Voluum — in Marcel's opinion the best tool of the three. It is also the most expensive. (We are Voluum users ourselves.)
• ClickFlare — very well known, especially in the search arbitrage scene. It is built by the same company behind The Optimizer. Cheaper than Voluum.
• RedTrack — the least known of the three, but solid. Also cheaper than Voluum.

Be honest with yourself about one thing: all three are more or less complicated. There is a learning curve before you understand the tool, know how to pull the data you want, and can set everything up properly. That is true of every serious tracker — it is not a one-click product.

One tool that does not belong on this list is The Optimizer, even though ClickFlare's parent company makes it. The Optimizer is an optimization layer — AI-style automation where you set rules like "if CTR drops below 2%, cut the ad" or "if it's winning, increase the budget." Useful, but it does not generate the tracking ID. A real tracker mints that ID and far more. Don't confuse the two.

How tracker rotation saves you from re-approval hell

This is where a real tracker earns its price. The setup runs: campaign, advertorial, sales page. The tracker hands you one URL, and that single URL is what you paste into Taboola or Outbrain.

Now the useful part. Inside the tracker you can split traffic across multiple advertorials — ADV1, ADV2, ADV3 — each getting 33.33% of the traffic. The tracker rotates them automatically. When you decide ADV3 is the worst performer, you delete it from the tracker.

Here is the payoff: the URL on the traffic source never changes. You don't resubmit for approval, and you skip the review queue that can hold a native campaign hostage for a while. You rotate and prune advertorials in the background while the live URL stays frozen.

The same applies to sales pages — rotate sales page one, two, and three without touching the traffic-source URL. Want to add ADV4 and ADV5 after your optimization tells you to make more content? Drop them into the campaign in the tracker. The URL stays the same. Every technical detail, including that ID, is handled by the tool.

Why your tracker becomes the source of truth at scale

Native is a scaling channel. On a low budget the math doesn't work, because tools like Voluum and ClickFlare add real cost on top of media spend. At $1k per month, software is an expensive percentage of your budget. At $100k per month, that same software is a far smaller slice. So use native for what it's built for: scale.

Once you are spending at scale, the tracker stops being a reporting tool and becomes your decision engine. At $10k per month you are not just looking at CTR and conversion rate. You are slicing by mobile device provider, by carrier, by whether the user was on Wi-Fi — the deep targeting data that decides where the next dollar goes.

The traffic source will not hand you that depth. Taboola and Outbrain give you a filtered, surface-level view. The granular, unfiltered data lives in the tracker. That is why we run optimization inside the tracker — it is the one place every number lines up against every other number, where you can double- and triple-check a conversion before you bet budget on it.

One warning before you hire a freelancer

If you have any technical comfort — you can read basic HTML — work through the tracker's documentation and set it up yourself. It is far safer than handing it off.

If you have zero technical knowledge, hire someone, but vet them hard. Marcel has seen plenty of accounts where clients paid a Fiverr or Upwork freelancer who swore they had the experience, and the setup turned out to be horrible. Those clients came to native-advertising.net and we found tracking that was quietly destroying their data. Only hire someone with a proven track record you can genuinely trust. A bad tracking setup is worse than none, because it looks like it's working.

Watch the full breakdown

Where to go from here

Tracking is the unglamorous part of native that decides whether your spend compounds or evaporates. Get S2S running end to end, pick one of the three trackers that fits your budget, and make it your single source of truth before you scale. Voluum if you want the best and can pay for it; ClickFlare or RedTrack if you want the same reliability for less.

If you would rather not gamble on a freelancer's "experience," book a strategy call and we will look at your current setup the way we look at every account that comes to us. We run native for DTC and dropshipping, lead-gen, and affiliate operators across Taboola and Outbrain, and proper tracking is step one in every engagement. See what that looks like in our case studies.