The feature that makes this a 2026 review

Most email tools bolted an AI writer onto a sidebar and called it done. Kit did something rarer. In May 2026 it shipped an official Model Context Protocol server, Kit MCP, that lets an AI client reach into your account directly. Connect Claude, ChatGPT, Gemini, Cursor, Windsurf or Cline, and the model can draft broadcasts, read subscriber data and work with your automations without you copying anything back and forth. The documentation lives at developers.kit.com.

The catch is where it sits on the plan ladder. Kit MCP is bundled from the Creator plan upward, not on the free tier. You can connect the server on Free, but every tool call comes back with an upgrade prompt instead of running, so it is a demo rather than a feature until you pay. One thing to keep straight: there is also an unofficial, third-party Kit MCP server on GitHub, unaffiliated with the company. This review is about the official one.

Pricing, and the increase Kit did not announce loudly

Kit runs three tiers: Newsletter (free), Creator and Creator Pro. At 1,000 subscribers, checked in September 2026, Creator is $39/month billed monthly, or $390/year, which works out to about $33/month if you pay for the year up front. Creator Pro is $79/month billed monthly, or $790/year, roughly $66/month on the annual deal.

Those numbers are close to double what they were. According to pricing trackers, Creator sat at $15/month and Creator Pro at $29/month at the same 1,000-subscriber tier before a September 2025 increase. The price also climbs with your list, and it climbs steeply: it keeps rising as subscribers do, roughly doubling again by the 10,000-subscriber mark. Aggregators disagree on the exact figure at each step above 1,000, so treat the higher tiers as approximate and check your own subscriber count against the live pricing page.

One line the plan comparison buries: Kit takes 3.5% plus $0.30 on every digital product sale, paid newsletter subscription and tip, on every tier including Free. If selling is part of your plan, that fee stacks on top of the subscription you already pay.

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What the free plan actually blocks

The Newsletter plan is genuinely free for up to 10,000 subscribers, a far higher ceiling than most rivals give away. You get unlimited landing pages, forms, broadcasts and email sends on it. For a writer who only wants to send a weekly letter, that is enough, and it costs nothing.

The wall you hit is automation. Free gives you no automated sequences, so a welcome series that drips over five days, or a tag-triggered flow, needs the Creator plan. Sources differ on whether Free allows a single automation or none at all, but the practical limit is the same either way: you cannot build the sequenced funnels that are the reason to use an email platform over a plain newsletter tool. Free also holds you to one user seat and stamps Kit branding on every email you send. Removing that branding, adding SMS, third-party integrations and unlimited automations is what the Creator plan buys, alongside the MCP server.

Creator Pro, the top tier, adds Subscriber Signals, engagement analytics, deliverability reporting, unlimited seats and a free SparkLoop recommendation plan. There is a 14-day trial with no card required. If you do not add a card by the end of it, the account cancels itself rather than charging you, and paid plans carry a 30-day money-back guarantee.

The complaint that keeps recurring: billing

Read enough recent reviews and one theme dominates, and it is not deliverability or design. It is the bill. On Capterra, web consultant Faydra D. F. wrote on 29 April 2026 that crossing to subscriber number 10,001 pushed her cost to either $116/month or $1,390/year, the pricing cliff landing the moment a list ticks over a threshold. Dru R., a CEO, described on 17 June 2026 roughly $936 in what he called overcharges, and put the pattern plainly: billing "automates in one direction, the one that charges more."

G2 reviewers echo it, describing accounts that automatically ratchet up to higher tiers while the downgrade option stays hard to find in settings. A 2026 Trustpilot review says the product "started going to hell in mid 2025" and complains that support is now largely AI-run, leaving tickets unresolved. Not every gripe is about money. On Capterra, non-profit director Tracie B. noted on 19 February 2026 that the templates paid subscribers get are "very basic" and have to be edited on desktop.

Kit versus ActiveCampaign

At 1,000 contacts, Kit Creator at $39/month is close to double ActiveCampaign's Starter plan, which runs $19/month billed monthly or about $15/month on an annual deal. On price at a small list, ActiveCampaign wins clearly. The comparison is said to flip as lists grow, because ActiveCampaign's curve climbs faster, so past some subscriber count it becomes the pricier option. No source pinned an exact crossover number, so treat that as a direction, not a promise. If your list is small and likely to stay that way, the math favours ActiveCampaign today.

Verdict

Kit is the right tool for a creator who is already earning from a large list and wants the AI hook. Past 10,000 subscribers the free tier is unmatched, and Kit MCP is a genuine reason to pick it over a rival if you run your writing through Claude or ChatGPT. Nathan Barry's team, which built ConvertKit in 2013 and rebranded to Kit in October 2024, is aiming this at the professional end of the creator economy, and the product fits that reader well.

Who should skip it: anyone with a small list watching costs. The Creator plan doubled in 2025, the per-transaction fee stacks on top, and the recurring billing complaints are specific enough to take seriously. If you are under a few thousand subscribers and want automations without the price cliff, ActiveCampaign's Starter plan does the same core job for roughly half the monthly cost. Kit earns its price at scale. It does not earn it small.

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