Score vs Klaviyo

Why affiliates look for a Klaviyo alternative

The phrase Klaviyo for affiliates contains a quiet contradiction. Klaviyo is a superb platform — for ecommerce brands marketing their own products to their own customers. Affiliate marketing is a different business, and two things baked into Klaviyo work against it at the same time: a policy that restricts affiliate use, and a pricing model that taxes the large lists affiliates depend on.

This isn’t a hit piece. Klaviyo’s ecommerce segmentation, lifecycle flows, and Shopify revenue attribution are genuinely best-in-class, and for a store marketing its own products it’s hard to beat. But “excellent for ecommerce” and “right for affiliates” are not the same claim — and the gap between them is exactly the point.

The policy problem: Klaviyo’s terms restrict affiliate marketing

Let’s be precise and source this rather than hand-wave. Klaviyo’s Acceptable Use Policy (last updated April 9, 2026) lists, among its prohibited uses, “promotions for the primary purpose of affiliate marketing, including but not limited to communications where you have no direct relationship to the promoted product or service other than affiliate commissions or links.”

Read the framing carefully. Klaviyo isn’t banning every account that has ever used an affiliate link — it prohibits sending whose primary purpose is affiliate marketing, where your only connection to the product is the commission. That describes how a large share of standalone affiliate email programs actually operate. The same policy restricts categories affiliates frequently overlap with: multi-level / network / referral marketing, list rental and list brokering, lead-gen that shares or sells consumer data, plus get-rich-quick offers, high-risk financial services, crypto, and gambling.

To be fair: the restriction exists for good reasons. Affiliate and list-rental traffic carries real deliverability and compliance risk, and Klaviyo protects its shared sending reputation by keeping that traffic off the platform. The point isn’t that Klaviyo is wrong to have the policy — it’s that the policy makes Klaviyo a poor fit for affiliates, by Klaviyo’s own design. If reliable sending is core to your business, building it on terms that restrict your use case is a standing risk.

The pricing problem: you pay for contacts, not sends

Klaviyo prices on active profiles — every contact you can reach — a model it moved to in early 2025. For an ecommerce brand with a curated list of buyers, that’s reasonable. For an affiliate whose entire business is having a large list to mail, it’s structurally expensive: your single biggest asset is also the thing the meter is pointed at. The shift to active-profile billing even made list hygiene a cost-control chore — every marginal contact you keep is a line item.

Put real numbers on it. Take an affiliate with 25,000 contacts who mails the list 8 times a month — a realistic offer-driven cadence, or 200,000 emails. On Klaviyo’s published tiers, holding 25,000 profiles runs roughly $400/month regardless of how often you send. On Score’s volume model — $15/mo including 10,000 emails, then $0.30 per 1,000 — those 200,000 sends cost about $72/month. The gap only widens as the list grows, because Klaviyo’s meter climbs with every contact while Score’s climbs only with the email you choose to send.

The honest caveat: these aren’t identical products. Klaviyo’s price bundles flows, segmentation, ecommerce attribution, and SMS — a whole marketing suite. Score’s price is for high-volume sending and deliverability infrastructure. The right reading isn’t “Score is 5× cheaper than Klaviyo,” it’s “if your need is high-volume sending to a large list, you’re paying Klaviyo’s per-contact suite pricing for capabilities an affiliate sender mostly doesn’t use.” The same per-contact-versus-per-send dynamic shows up against another all-in-one ESP like Mailchimp.

Deliverability built for volume, not just brands

Pricing is the visible problem; deliverability quietly decides whether campaigns make money. High-volume affiliate sending lives on a few capabilities mainstream ESPs gate or omit:

• Dedicated IPs — at volume you want your reputation in your own hands, not pooled with thousands of other senders. Score provides dedicated IPs as a core part of the high-volume model; on Klaviyo they typically sit at higher tiers or as an add-on.
• IP and domain warm-up — a new dedicated IP that suddenly blasts 200,000 emails gets throttled or blocked unless it’s ramped gradually. Score builds warm-up in; on most ESPs it’s your job to plan and execute.
• Deliverability monitoring out of the box — reputation drift, blocklistings, and placement drops cost money the moment they happen. Score surfaces them proactively rather than reporting only within shared infrastructure.

The policy layer is really a deliverability issue in disguise. Klaviyo keeps affiliate traffic off its shared reputation; Score takes the opposite, deliberate stance — affiliate-friendly policies because affiliate senders are the intended customer, paired with the dedicated infrastructure that makes high-volume sending land. You’re not operating against the platform’s design; you’re operating with it. (The same multi-provider routing model is available without the single-ESP limits of a provider like SendGrid.)

Who should use which

A comparison that pretends the competitor is never right isn’t worth reading. Use Klaviyo if you run an ecommerce brand — especially on Shopify — marketing your own products, and you want best-in-class segmentation, flows, and revenue attribution tied to your store. For that profile it’s genuinely excellent.

Use Score if you’re an affiliate or bulk sender mailing offers at high volume, you manage a large list where per-contact pricing eats your margin, you need dedicated IPs, warm-up, and deliverability monitoring without enterprise gatekeeping, and you want sending policies that treat affiliate marketing as a first-class use case. If that’s you, you’re not Klaviyo’s target customer — and forcing the fit usually ends in a bigger bill or a suspended account.

A note on doing it right: affiliate-friendly is not rules-free. Permission, honest subject lines, working unsubscribes, and clean list hygiene still apply — legally and for deliverability. Score makes high-volume affiliate sending viable; it doesn’t make spam work.

If you’re running affiliate offers at volume, you don’t need to bend a brand-marketing tool to fit — you need infrastructure built for the job. Start sending on a platform built for high-volume affiliates and pay only for the email you actually send.