Stack Influence charges $0/mo. No subscription. You pay roughly $30 per completed creator post, and that is the whole model: pure pay-per-post, fully managed sourcing included (verified 2026-08-19). If you want to compare it against a subscription gifting app like the one I run, that difference in structure matters more than any feature list.
I run Seed, a Shopify gifting app, and I ship product to creators every week for my own DTC store. I am going to say the honest thing up front instead of burying it: for a specific kind of brand, Stack Influence beats Seed. Here is the full list, with real prices, so you can tell which kind of brand you are.
The real price list (verified 2026-08-19)
| Tool | Price | Model |
|---|---|---|
| Stack Influence | $0/mo + ~$30 per completed post | Pay-per-post, fully managed, off-platform |
| Seed | Free / $19/mo / $49/mo ($499/yr) / $299/mo Concierge | $0 draft-order gifting via link, self-serve |
| Influencer Gift Form | Free / $68/mo (100 orders) / $380/mo | $0 draft-order gifting via link |
| Shopify Collabs | Free to install + 2.9% on payouts | Native Shopify marketplace |
| Social Cat | $99 / $199 / $299 per month, 7-day trial | Two-sided creator marketplace |
| GRIN | $0-$1,500/mo, month-to-month, no sales call | Enterprise creator relationship management |
| Trend.io | $550-$3,872 credit packs, ~$69/video at top tier | Pay-per-content UGC, credit-based |
Where the two models actually diverge
Seed is a tool you run yourself. You post a link, a creator fills out a gift form, a real $0 draft order lands in your Shopify admin, and a human on your team approves it before anything ships. Nothing about that process guarantees the creator posts anything. You are trading platform fees for control: you pick who gets gifted, you approve every order, and the content that comes back is whatever the relationship produces. hiccpet runs 19 gifts a week this way and moved off manual coupon codes to do it. Dr Water shipped 138 gifts in 46 days on the same mechanic, done-for-you through Seed's Concierge tier.
Stack Influence sells the opposite trade. You are not managing gifting logistics, you are buying an outcome: a completed post, sourced and managed by Stack Influence's own team, off-platform, with no Shopify App Store listing because the whole workflow happens outside Shopify. You pay per result, not per month, and you are not the one approving draft orders or picking variants. If a creator does not post, by Stack Influence's own pricing structure, you should not owe the ~$30 fee for that creator. That risk transfer is the entire value of the pay-per-post model, and it is a real one.
Trend.io sits in a similar pay-per-content bracket worth naming here, though its mechanic is credit packs rather than per-post billing: Starter at $550, Essential at $1,045, Growth at $1,980, and Scale at $3,872, covering 6 to 56 pieces of UGC content, working out to roughly $69 per video at the top tier. Trend.io is aimed at brands buying UGC content specifically, not creator gifting relationships, so it solves an adjacent problem: paid content production rather than a gifted-product-for-a-post exchange. If your goal is a library of usable video assets rather than an ongoing creator relationship, Trend.io's credit-pack model is closer to what you want than either Stack Influence or Seed.
The mechanism gap between Seed and Stack Influence is worth spelling out plainly, because it explains why the risk sits in different places for each. On Seed, once a creator submits the gift form, a real draft order gets created in Shopify, but it is gated: no order object exists until a human on your team approves it. After a Shopify delivery webhook confirms the product arrived, Seed tracks that creator on a Kanban board so you can see whether a post followed. Nothing in that chain guarantees a post happens. It only guarantees the shipping and approval process is clean. Stack Influence's fee only triggers on the other end of that chain, once a post is actually live. Neither tool controls whether a creator follows through on a verbal agreement to post; they just put the financial risk of that uncertainty on different parties.
Who should not pick Seed
This is the section I will not soften. If what you want is a guaranteed published post and zero platform risk, and you do not want to manage sourcing, approvals, or shipping logistics yourself, Stack Influence genuinely beats Seed. It is fully managed. There is no Shopify App Store listing to check reviews on because it is not an embedded app you install and operate, it is a service you hire. If your team has no bandwidth to run a gifting workflow, approve orders, and follow up with creators, paying ~$30 per completed post to outsource the whole thing is a rational trade even though it can cost more per creator than Seed's flat monthly fee once volume goes up.
Seed makes sense for the opposite kind of brand: one that wants to run its own gifting program, pick its own creators, keep gifting on Shopify's own order rails, and pay a flat fee regardless of how many creators it sends product to. At $49/mo for unlimited orders, a brand shipping 50+ gifts a month pays a fraction of what the same volume would cost at $30 per completed post through Stack Influence, assuming most of those gifts convert to content. But that only holds if your team actually has the capacity to run approvals and follow-ups. If it does not, Stack Influence's managed model removes that burden, and its $0 subscription floor means you are not paying anything until a post actually completes.
Shopify Collabs is the other free option worth naming: install cost is $0, with only a 2.9% fee on payouts through Shopify's own billing. It is not currently accepting new creator signups per Shopify's Help Center, which limits it mostly to brands with existing Collabs relationships.
There is also a middle path some brands land on: running Seed for the bulk of routine gifting, where you already know the creator and just need clean fulfillment, and reserving a Stack Influence-style pay-per-post arrangement for a smaller number of higher-stakes placements where a guaranteed post matters more than cost per unit. Nothing about either tool locks you into using only one. The two models solve different halves of the same problem, and most brands running both gifting and paid UGC end up needing both halves eventually.
What to do next
If you want to run your own gifting program, pick your own creators, and pay a flat fee no matter how many gifts you send, install Seed at apps.shopify.com/influencer-form. Free covers 5 orders and 1 campaign. $19/mo covers 50 orders and 5 campaigns. $49/mo or $499/yr covers unlimited orders. $299/mo Concierge runs it for you. Full pricing is on /pricing.
If you want a guaranteed post with zero operational lift and are fine paying per result instead of per month, Stack Influence is built for that, and it is the honest pick for that buyer. See the full Seed vs. Stack Influence comparison or the full Stack Influence pricing breakdown for more.
Frequently asked questions
How much does Stack Influence cost?
$0/mo subscription, roughly $30 per completed creator post, fully managed sourcing included, verified 2026-08-19. There's no monthly fee at all, just the per-post charge when content actually goes live.
Does Stack Influence guarantee a post the way Seed can't?
Yes, structurally. Its fee only triggers once a post is actually live, transferring the risk of a no-show creator to Stack Influence rather than the brand. Seed guarantees clean shipping and approval, not that a post happens.
Is Stack Influence a Shopify app?
No. It has no Shopify App Store listing because the whole workflow, sourcing, managing, and posting, happens off-platform through Stack Influence's own team.
At what volume does Seed cost less than Stack Influence?
Above roughly 50 gifts a month, assuming most convert to content. Seed's $49/mo unlimited tier is a fraction of what the same volume would cost at $30 per completed post through Stack Influence.
Can I use both Seed and Stack Influence?
Yes. A common middle path is running Seed for routine gifting where you already know the creator, and reserving Stack Influence's pay-per-post model for higher-stakes placements where a guaranteed post matters more than cost per unit.