What an email platform really costs at 1,000, 10,000 and 50,000 contacts

Asked what the best email marketing platform is and what it really costs, ChatGPT and Gemini named five platforms and attached dollar figures to contact tiers of 1,000, 10,000 and 50,000. We fetched all five pricing pages the next morning. One of them rendered a readable price, and the engine that quoted it was right to the dollar. One served a currency calculator with a total of one dollar, one served rupees, one rendered price placeholders reading two dashes for every plan, and one did not render its plan text to our fetch route at all. So the honest answer to what it really costs is that four of these five vendors do not publish a per tier dollar price a visitor can read, and the tier figures in both AI answers came from third party blogs rather than from the vendors.

What was asked, and what came back

One question, put to the ChatGPT and Gemini product surfaces through a data provider on 21 October 2026, at 22:19 and 22:37 UTC. Both ran a live web search. The question named no vendor.

• ChatGPT returned 13 citations, nine of them on the pricing or help pages of the four platforms it named: Brevo, Mailchimp, Klaviyo and Kit. It added a planning table of monthly budgets by list size and labelled it as planning estimates rather than quotes.
• Gemini returned five citations and named ActiveCampaign, Klaviyo, Mailchimp and Brevo. Not one of its five sources was a vendor pricing page. They were two tutorial sites, a review site, a shopping blog and, for its Brevo pricing, a blog post published by a competing email vendor.
• Five distinct platforms were named. Three of them, Klaviyo, Mailchimp and Brevo, appear in both answers.

The tier prices the two answers gave

Platform	Engine	Price quoted, by tier
ActiveCampaign	Gemini	1,000 contacts at 15 Starter, 49 Plus, 79 Pro. 10,000 contacts at 189 Starter, 419 Pro
Klaviyo	Gemini	30 a month to 1,000 contacts, 150 to 10,000, 720 to 50,000, free to 250
Klaviyo	ChatGPT	Email from 45 a month for the configuration shown, including 15,000 monthly sends, free to 250 active profiles
Mailchimp	Both	Essentials 13 and Standard 20 at 500 contacts. Gemini adds Standard at 100 for 5,000 and 200 for 10,000, and a free tier of 500 contacts
Brevo	Both	Starter from 9 a month, Standard from 18, both for 5,000 emails a month rather than a contact count
Kit	ChatGPT	Free to 10,000 subscribers, Creator at 33 a month for 1,000 subscribers

What the five pricing pages rendered on 22 October 2026

Each reading below belongs to the URL it was read on, not to the brand, and the machine that read it sits on an Indian IP address, which three of the five pages visibly took into account.

• Kit, confirmed to the dollar. kit.com/pricing renders Creator at 33 dollars a month for 1,000 email subscribers, with 390 billed yearly beside it, and the free plan headed free up to 10,000 subscribers. Both of ChatGPT's Kit claims match. The page does contradict itself, because the free card also reads for 1,000 email subscribers under a heading that says up to 10,000, and both readings render.
• Klaviyo, a calculator rather than a price. klaviyo.com/pricing served us a United Kingdom page with a United States dollar selector, and the only total it rendered was USD 1 beside a build a plan estimate link. The free tier limits were readable and correct: up to 250 active profiles and 500 email sends a month, which is the figure both engines gave. No price for 10,000 or for 50,000 contacts appears anywhere on it, so neither the 45 nor the 30, 150 and 720 series could be checked against the vendor that day.
• Mailchimp, priced in rupees. mailchimp.com/pricing/marketing served every figure in Indian rupees: Essentials at 845, Standard at 1,265 and Premium at 25,300 a month for twelve months, under a save 50 per cent banner whose after offer line rendered as then, starts at, with no amount. Its free plan reads limit of 250 contacts, where both engines said 500. The dollar figures of 13 and 20 are not on the page as it was served to us, which records what the server did on that date.
• ActiveCampaign, no number at all. activecampaign.com/pricing renders two dashes and the words per month for all four plans, Starter, Plus, Pro and Enterprise, each under billed yearly for 1,000 contacts, with a six currency selector and no amount in any of them. Every one of the five ActiveCampaign figures in the Gemini answer is absent from the vendor page as served.
• Brevo, body did not render. brevo.com/pricing returned a document containing its title and no plan text through our fetch route, so the 9 and 18 dollar figures that both engines gave could not be checked that day. That is a fetch result and not a judgement on the figures.

Why the tier price is the hardest number in this category to pin down

These five vendors do not bill on the same unit, which is the part that makes a side by side tier table misleading before any figure is wrong.

• Per contact or per profile. Klaviyo prices on active profiles, so a list that grows while engagement falls raises the bill on its own.
• Per subscriber. Kit prices on email subscribers and publishes the figure for 1,000 of them, which is why it is the one page here with a clean number.
• Per email sent. Brevo prices on monthly email volume, which both engines noted. A 50,000 contact list that sends one campaign a quarter is cheap on this model and expensive on the other two.
• Per contact with a promotional year. Mailchimp's rendered price was a twelve month promotional rate whose renewal figure did not render at all.

So a buyer asking what it costs at 10,000 contacts has asked a question that only one of these pricing models can answer directly. Ask instead for the twelve month cost at your own contact count and your own monthly send volume, with the renewal rate written next to it.

What to do with five names and one verified price

1. Price your send volume and your contact count separately before shortlisting, because those two numbers choose the billing model for you.
2. Get the renewal rate in writing. One of these five rendered a promotional rate with the renewal amount missing, and another publishes a first year discount it states will renew at the standard rate.
3. Use the vendor's own estimator and screenshot the total. Two of the five hide the tier price behind a calculator or a placeholder, which is also why assistants quote blog figures for them.
4. Check the currency you are being shown. Three of these five pages decided the currency from the visitor's location, and one showed a dollar selector while serving a United Kingdom page.
5. Treat the free tier limits as the most reliable numbers in any AI answer. They were the claims that survived every check here, because they are short, fixed and rendered in text.

For an ecommerce store the shortlist narrows fast, and the integration work matters more than the monthly figure. Our walkthrough of connecting Klaviyo to Shopify and the first flows to switch on covers what actually syncs before you commit to a profile based bill.

The question neither answer was asked, and should have been

Both engines were asked what an email platform costs and both answered with vendor prices. Neither reported how often an assistant names a given platform when a buyer asks this question, or which sources decided the five names in front of this reader. On this question those sources were two tutorial sites, a review site, a shopping blog and a rival vendor's blog post for one engine, and nine vendor pages for the other. That is the measurement AI Knows Us sells: the buying questions put to ChatGPT, Gemini, Perplexity, Claude and Google AI Overviews, every brand named, every source cited, reported with the date. We sell no email software and no email services, so nothing here is a bid against the five platforms above.

Our own rates, verified on 22 October 2026, because this page grades other vendors on published pricing. In the US and the UK the ladder is SEO Start 149 dollars a month, Growth 299, Scale 599, SEO Scale 699, Inbound 1,099, Outbound 1,299, Agency 1,299 and Everything 1,799. Outside the US and the UK the first two tiers are 99 and 199, so there is no single global floor. SEO Start reads 0 questions on 0 engines, which makes Growth at 299 the cheapest plan that reads all five surfaces, and a Claude reading costs 3 credits against 1 for the others.

Where a rival is stronger, by name. tryprofound.com publishes single sign on, SAML and SOC 2 with up to nine answer engines on its enterprise tier. Our own pricing document, 119,203 bytes read on the same day, renders no single sign on, no SAML, no SOC 2, no ISO certification, no data processing agreement and no white label, and we read five surfaces rather than nine. It also contradicts itself on multi brand use, listing businesses covered as 1 1 1 1 1 1 10 1 across the plans while the row beneath reads more than one business, no, in every column. Both render, and we print it here rather than let a buyer find it later.

The limits of this audit, stated plainly. It is one question per engine on one night and five vendor pages fetched once, from an Indian IP address, which is recorded beside every figure because three of the pages used it. A page that served us a placeholder or a blank renewal line may render both correctly for a US visitor on the same day.

Questions US buyers ask about email platform pricing in AI answers

Why do two assistants quote different prices for Klaviyo

Because one read the vendor page and reported the configuration shown to it, 45 dollars a month with 15,000 sends, and the other read a third party explainer that lists 30, 150 and 720 by contact tier. The vendor page we fetched renders neither series, only a plan estimator. Build the estimate on the vendor's own calculator and keep the screenshot.

What does email marketing software cost for 10,000 contacts

From the pages we could read on 22 October 2026, no vendor in this set publishes a flat dollar figure for 10,000 contacts. One publishes 33 dollars a month for 1,000 subscribers, one prices by monthly email volume instead of contacts, one requires its estimator, one rendered placeholders, and one served a promotional rupee price. The quoted figures of 150 and 200 a month for that tier come from third party commentary.

Is the free tier really 250 contacts or 500

Both engines said 500 for Mailchimp, and the page served to us reads limit of 250 contacts. For Klaviyo both engines said 250 active profiles and the page confirms it, along with 500 email sends a month. Free tier limits are the one class of figure that survived every check here, so read them on the vendor page and treat anything larger as a stale claim.

Why does an assistant quote a price my vendor page does not show

Because a price that lives behind a calculator, a currency switch or a placeholder cannot be read, and the gap is filled from whichever blog does publish a number. Two of these five pages rendered no amount for any paid plan, and both are the ones whose quoted figures matched nothing.

How do I check what assistants tell buyers about my own platform

Ask the buying question a customer would ask, with the list size in it and your product name left out, on each assistant. Record every platform named, every figure quoted and every source listed, then check each figure against your own page in the currency your buyers see. Repeat it a week later, because the names and the numbers both move.