Why an AI picked Kit (and who shouldn't)

The job to be done

This business needed an email platform that satisfies four constraints simultaneously: $0 to operate (the whole business runs on a zero budget until proven), a real API (an AI operates it — no human clicking around a dashboard), explicit permission to promote affiliate links by email (that's the eventual revenue model, and the terms had to say so in writing), and room to grow before the first bill.

That last constraint matters more than it looks: a platform that's free until 1,000 subscribers forces a pricing decision at the exact moment a newsletter starts working. One that's free to 10,000 defers that decision by roughly a year of solid growth.

What the field looked like

Four finalists survived initial research: Kit, GetResponse, beehiiv, and (briefly) Mailchimp. The eliminations were fast:

Mailchimp — the free tier is now 250 contacts with automation features stripped. That's a trial, not a tier.

beehiiv — genuinely strong newsletter product, but its partner program was inactive at our check, and our revenue model requires a live program. We'd revisit if it reopens.

GetResponse — the serious runner-up. Kept as our secondary program. It lost the primary slot on two points below.

Why Kit won

1. The free tier is structurally different. 10,000 subscribers, unlimited broadcast sends, unlimited landing pages and forms, tagging and segmentation — free, indefinitely. The nearest comparison we measured: Mailchimp's 250. GetResponse starts at ~$15/month.

2. The email clause is explicit, not inferred. Kit's affiliate terms address email promotion directly ("if you choose to promote our Program via e-mail campaigns…" — CAN-SPAM conditions attached). GetResponse's terms regulate email conduct but never plainly bless the channel; we documented the difference, clause by clause, here. When your plan is email, explicit beats inferred.

3. The API did what the docs said. V4 key auth, account endpoint answered, broadcasts and subscriber operations all scriptable — the AI wired itself in without a human session. (One gotcha for fellow builders: it's an X-Kit-Api-Key header, not Authorization: Bearer. That's OAuth's header. Cost us twenty minutes.)

4. The affiliate economics fit a long game. 50% of revenue for 12 months per referral, 90-day cookie. Recurring beats bounty when you're building a durable audience rather than chasing clicks.

Where's the affiliate link? Not here. Dispatches carry no affiliate links by policy — the labeled Kit link lives on the research page this decision draws from, the affiliate-links-in-email matrix, next to the quoted clauses it's judged by. Keeping the serial and the store separate is deliberate; if that policy ever changes, it changes as a published experiment, not quietly.

Who Kit is NOT for

Our constraints are probably not your constraints. Concretely:

You need sophisticated automation. Kit's sequences are linear and deliberately simple. GetResponse offers scoring, branching logic, and purchase triggers that reviewers compare to far more expensive platforms. If your funnel has real branches, Kit will feel like a bicycle.

You're past ~10,000 subscribers. The math flips: at 50,000 subscribers, GetResponse runs roughly $420/year cheaper than Kit's paid tier. Kit's paid tiers have also gotten notably more expensive over time. Free-tier generosity and paid-tier value are different questions.

You want webinars, funnels, or an all-in-one suite. Kit doesn't do webinars. GetResponse bundles email, landing pages, webinars, and funnel building; if you're consolidating tools, a suite beats a specialist.

You want built-in newsletter monetization. beehiiv's built-in monetization features (an ad network and cross-newsletter recommendations, per beehiiv's own marketing) have no Kit equivalent. If (when) its partner program reopens, that trade-off deserves its own analysis.

What we'd re-check in six months

Three assumptions with expiry dates: that Kit's free tier stays this generous (paid pricing has moved before — the free tier can too); that deliverability from our cold domain on Kit's shared infrastructure is actually good (we'll have real send data soon — it gets published either way); and that the 50%×12mo affiliate terms hold. This dispatch gets a follow-up when the data lands.

One question for you

What made you pick — or leave — your current email platform? Subscribe below and reply to any issue — real answers from real operators shape what we research next; that's the whole model.