Spy tools 2026 — Anstrex vs AdPlexity vs BigSpy vs AdSpy vs us, judged on the same axes

Disclosure: I (mediabuyer.site) built one of the tools in this comparison. I'll judge ours by the same criteria as the rest, and call out where we're weaker. If you want a clean review with no conflict of interest, the affLIFT AdPlexity-vs-Anstrex thread is the standard reference; I'll cite it below where it earns it. This piece is opinionated on purpose. I am picking winners by use-case rather than averaging the field.

A note on what I'm not going to do. I'm not going to give you a giant ad-count number per tool. The tools all claim numbers that look impressive in their pricing pages and that none of them can defend on the public web — see my earlier piece on why most native-ad spy data is wrong for the long version. Counts are a marketing artifact. What matters is whether the tool finds the ad you're hunting for, and whether you can do something useful once you've found it.

The five tools, the seven axes

The five tools I actually open in a typical week are Anstrex, AdPlexity Native, BigSpy, AdSpy, and our own corpus at mediabuyer.site. I do not open NativeAdBuzz; the catalog is too narrow and the UI hasn't shipped a meaningful change since I started looking in 2023. I do not pay for AdBeat outside of one-off display research; the tier is wrong for a solo operator. PowerAdSpy I have a trial on and find unremarkable.

The seven axes I'll judge them on:

1. Networks indexed.
2. Free or paid (and what tier).
3. Ad sample browseable without a signup.
4. Bulk export of results.
5. Landing-page download (ripper).
6. Affiliate-network identification on the destination URL.
7. Cross-source coverage — Meta, Google, TikTok in the same tool as native.

The table:

A few of those cells deserve a sentence.

Networks indexed. Anstrex publishes the longest native-network list of any single SKU. AdPlexity Native runs deeper on the eight networks it does index — more historical retention, better creative-variant detection — but the list is shorter. BigSpy is the inverse: very broad across surfaces but shallow on any one network. AdSpy is Meta-only by design, which is fine if Meta is your business. Our index covers the four native networks that drive the bulk of US/EU CPA volume and is light on the long tail (RevContent we're catching up on; AdNow is partial). We do not have AdPlexity Native's depth on Yahoo Native, and that gap is real.

Tier. The relevant axis here is "what kind of buyer can stomach the bill," not the sticker itself. AdPlexity sits at the top of the category and stacks per-vertical SKUs, so a multi-vertical pro operator is paying the most by a comfortable margin — the bundle math only makes sense at scale. Anstrex is the mid-tier bundle play for a solo or duo: one purchase covers native and push at a tier an early-revenue affiliate can absorb. AdSpy is a single flat tier aimed at Meta-focused buyers — predictable, no surprise upcharges. BigSpy has a real free tier, capped on searches per day, that is usable for low-volume research, with an entry-level paid plan above it. We are free, no tier, no signup, period.

Sample without signup. This is the axis where I see the biggest gap between what the tools claim and what they let you do. Anstrex, AdPlexity Native, AdSpy, and even most of BigSpy's interesting features require a logged-in session. Our entire corpus is on the open web; every ad we publish is a crawlable, indexable URL. That's a deliberate product decision, not a side effect — see the long version on our strategy from competitors doc, which is internal but the gist is: paywalled ad data has zero SEO surface, so we shipped the opposite.

Bulk export. All paid tools offer CSV. We do too. BigSpy gates it behind a Pro plan. Nothing exciting on this axis; it's table-stakes.

Landing-page download. Anstrex is the clear winner here. Their LP ripper is genuinely good — it pulls the full DOM, rewrites asset paths, and deploys to AWS/FTP without you opening a terminal. AdPlexity Native ships an LP downloader that's adequate but less polished. AdSpy and BigSpy don't have one. We don't either, yet — it's on the roadmap behind affiliate-network ID and per-advertiser pages, which both matter more to the kind of operator who reads us. Honestly, anyone who is going to rip a landing page in 2026 is using Anstrex for that specific job, including some operators who pay for both Anstrex and AdPlexity just to get the ripper.

Affiliate-network identification. This is our wedge. None of the four paid tools tell you which CPA network an ad's destination URL belongs to. Anstrex shows you the landing page; it does not tell you that the LP redirects through MaxBounty's tracker, or that the offer is a Mobidea aggregator placement, or that the call-to-action button fires a postback at AdCombo's domain. We do. We resolve the URL chain, fingerprint the tracker, and tag the ad with the affiliate network. If you want to know which networks are running the Derila pillow offer right now, this is the only public surface that will tell you. Aggregated leaderboard view is up at /affiliate-networks.

Cross-source coverage. This is where I lose. BigSpy covers Meta, TikTok, Google, Pinterest, Twitter, and Unity in the same search. We don't have any of those today. If your business is half native and half Meta, you have to run two tools — and BigSpy is the better second tool for the non-native half, not us. I'll come back to this in the limitations section because it's the single biggest thing on my honest list.

What real operators say

Two quotes from real threads, because I'm tired of "as one Reddit user put it" without a URL.

"AdPlexity for most ads and geos for CPA, but Anstrex and AdFlex are really great with native and advertorial." — T J Tutor, AffiliateFix admin, Seeking Help — best spy tool for native ads

That's the consensus view, more or less. AdPlexity is the default recommendation when budget isn't the constraint; Anstrex is the default for native-specific work. The thread runs for several pages and the tone never really shifts — there's a top tier (AdPlexity), a middle tier (Anstrex / AdFlex), and a long tail of also-rans. The interesting commenters are the ones who run both AdPlexity and Anstrex on top of each other, because the overlap between them on the same network in the same week is somewhere in the 40–60% range — exactly what I'd expect from the structural-sampling reasons I went into in the methodology piece.

"I would recommend adplexity, simply the best spy tool out there imo." — Aiden L, on the AffiliateFix "best affiliate marketing spy tools" thread

The thread also has a recurring "Anstrex offers three different options for native, push and dropshipping — it's a great and inexpensive tool" line that operators paste at newcomers, because the newcomer question is always some version of which one do I buy first. The forum answer, for budget-constrained newcomers, is essentially always Anstrex; for revenue-positive operators with multi-vertical budgets, it's AdPlexity, sometimes both.

What the forum threads do not talk about, and what surprised me when I started building this corpus, is affiliate-network identification. The operators in those threads are mostly running their own offers or working with a single AM, so they don't ask the tool "who's running this product." That blind spot is part of why I built our wedge there. The thread regulars don't know they're missing a feature because nobody has shipped it yet.

A contrarian take

The consensus reviews — including the affLIFT comparison, AdPlexity's own marketing pages, and most of the affiliate-blog SEO content — rank Anstrex as the #1 native spy tool for solo and mid-tier affiliates. I don't agree.

I think AdPlexity Native is, on a creative-level depth basis, materially better than Anstrex on the specific networks AdPlexity indexes. AdPlexity's variant detection — the ability to group ten near-identical creatives into one "campaign" with a variant ladder — is more accurate than Anstrex's, and that single feature reshapes how you scan a corpus. Anstrex shows you a wall of near-duplicates; AdPlexity shows you a campaign with a variant tree, and the tree is usually right. The reason Anstrex wins the popularity contest isn't that it's a better tool. It's that it sits in a friendlier tier and bundles five surfaces, so the unit economics for a solo affiliate are simply more favorable.

The right framing: Anstrex is the better purchase for most affiliates because of the value-per-feature curve at its tier. AdPlexity is the better tool for any single feature you care about. The "best spy tool" question conflates those two, and the conflation has been wrong for at least two years.

I'll also predict, loudly, that BigSpy's strategic position is going to keep getting better. Meta/TikTok cross-source coverage is the direction the buyer's job is moving, and the closed native networks are losing share to programmatic, which is bringing more buyers into Meta and TikTok anyway. A pure native spy tool — including ours — is a smaller market in 2030 than in 2026. We know it; AdPlexity and Anstrex know it.

An honest limitation of mediabuyer.site

We do not cover Meta, TikTok, Google, Pinterest, or Twitter today. BigSpy does, and on those surfaces BigSpy beats us outright — it's not close. A media buyer whose mix is half native, half Meta cannot rely on us alone. That operator should bookmark us for the native + affnet-ID side, and use BigSpy (or AdSpy for Meta specifically) on the social side. We will catch up over time, but I am not going to pretend we already have or that the upcoming roadmap closes the gap in 2026.

A second limitation, smaller but worth admitting: our retention window is 30 days. Anstrex retains creatives for years and AdPlexity for longer than that. For historical campaign reconstruction — "what did this advertiser run during Q4 2024 holiday push?" — neither I nor BigSpy is the right tool. Use Anstrex.

A third: our landing-page download story is a roadmap line, not a shipped feature. If you want to rip an LP today, use Anstrex. Tomorrow we'll have it. Today we don't.

I'm not adding caveats just to seem humble. These are the three places where, if I were buying tools for myself and didn't already work on one, I'd use someone else.

The verdict, by use-case

The recommendation actually depends on who you are.

Newbie — first 90 days, no revenue yet, learning the craft. Start with our free corpus at mediabuyer.site for native research, and BigSpy's free tier for Meta/TikTok. Spend the budget you would have spent on Anstrex on a tracker (Voluum or Binom) and a cloaker instead. Spy tooling is the third-most-important purchase in your stack, not the first. When you start running campaigns and want LP downloads, then buy Anstrex.

Mid-level — running a steady book, one to two verticals, scaling. Anstrex is the right primary purchase at this tier. Bundle native + push if you run both. Use BigSpy's free tier or our corpus as the second source on whatever Anstrex isn't catching. Use us specifically for affiliate-network identification when you need to figure out who else is running an offer. Do not buy AdPlexity yet — the variant-tree quality is real, but the tier sits above where your revenue comfortably absorbs it.

Pro — multi-vertical, scaled, spy budget is a rounding error. AdPlexity Native as primary. Add Anstrex push or Anstrex native depending on which vertical you're scaling. Add us for the affiliate-network identification work and the public-web SEO research you can't do inside Anstrex's app (their app is invisible to Google; ours is the opposite). Add AdSpy if Meta is part of your mix. At this scale, treat the spy stack as fixed overhead — a category-level line item, not a per-tool negotiation.

Pro running Meta-heavy — AdSpy is the only tool in this comparison that takes Meta seriously enough to give you commenter and engagement filtering. Use it. BigSpy is the second-best Meta tool, but it's a generalist; AdSpy is specialist.

What I'd want next

If I could change one thing about the entire spy-tool category, it wouldn't be tier, retention, or coverage. It would be transparency about coverage gaps. Every tool in this comparison — including ours — has structural gaps that the tool's UI doesn't surface. You think you're looking at "every Outbrain ad," but you're actually looking at the slice your specific scraper happened to catch in its specific publisher footprint with its specific country-IP mix. The vendor that ships a coverage-gap visualizer — "here's what we know we don't see" — will earn the trust of every serious operator in the category. We're working on a version of that. So far no one else is.

In the meantime, the practical answer is the boring one: cross-reference at least two tools whenever the decision matters. Use ours for native + affnet ID. Use Anstrex for LP rip and for the long native tail. Use BigSpy or AdSpy for the social side. Don't trust any single number any single tool gives you. Trust the union.

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This piece names competitors because tool-comparison editorial requires it; the rule everywhere on the site is to argue from positioning rather than sticker callouts.