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Best email and SMS marketing platform compared, and the one line that tells you whether SMS is actually included

Buying both channels from one vendor is usually right. The trap is that SMS is almost always an add on billed separately, and only one of these two vendors says so with a number beside it.

Published by AI Knows Us · Updated 22 October 2026

One vendor for both channels is usually the right answer, because a single list, a single consent record and one automation builder beat two of each. The thing that goes wrong is budget, and it goes wrong in the same way every time. Email is in the plan price. SMS almost never is.

The criterion, and the one line to look for

Does the vendor publish the plan price and the per message SMS rate on the same page, and does it say plainly whether SMS is included or added. That single line decides whether the number you budgeted is the number you will be billed.

Omnisend is first, because it publishes both halves and labels the add on

Read at omnisend.com/pricing on 21 October 2026, the plan prices render. Free is 0 dollars with "Send up to 500 emails per month" and "Reach up to 250 contacts each month. Based on your billable contacts count." Standard is 11.20 dollars a month billed monthly with 6,000 emails a month. Pro is 41.30 dollars a month billed monthly with unlimited emails.

And it answers the question this page is about, in four places. The Pro card says "SMS starting at $0.007" with an Add button beside it. The page says "Add Global SMS credits to your Pro plan." The SMS feature row says "Charged separately, per SMS." And the FAQ says Pro includes "bonus SMS credits equal to your monthly bill", which is the only included SMS allowance on the page and it applies to Pro only. No SMS credits are stated for Free or Standard.

So a buyer can model it. Pro at 41.30 dollars a month gives you roughly 41 dollars of bonus SMS credits, and at a starting rate of 0.007 dollars a message that is a meaningful first allowance before you add anything.

Two things on that page to read carefully rather than at face value. The Standard and Pro figures are shown with a 30 percent discount applied, with the page stating "Total of: $48.00 $33.60 today" for Standard and "Total of: $177.00 $123.90 today" for Pro, alongside a "Pay 3 months upfront (save 30%)" option, so the headline monthly figure is a promotional one. And the page says "Pricing in local currency are estimates. Billing is in USD", which means any non dollar figure you see there is indicative.

Klaviyo is second on this criterion, and the gap is entirely about what renders

Read at klaviyo.com/pricing on 21 October 2026, the free plan publishes real limits. "Up to 250 active profiles", "500 email sends/month", "$5 of mobile messages/month" described as region and provider dependent, and "$5 of Composer usage/month". The FAQ confirms the free plan stays free "as long as your account remains under the limits" of 250 active profiles and 500 monthly email sends.

No paid price for email or for SMS renders on the page. The only price like figure is a "Total: USD 1" in the plan calculator with no explanation attached, and no profile limits are published for any paid tier. For a buyer whose whole question is what the combined channel will cost, that is the decisive difference between the two vendors and it is why Klaviyo is second here rather than first.

Four further contradictions on that page, reported rather than resolved, because a vendor page can disagree with itself and a reader is better served knowing than guessing. The page served to this fetch was the UK English pricing page while the calculator showed a US dollar figure and a US flag. The free plan highlights say email support with no time limit while the support section and the FAQ limit it to the first 60 days. Customer Hub is listed as a free plan feature in the introduction and is absent from the free plan feature list. And one FAQ says sending "may be paused" or "may be restricted" past the limits while another says sending stops "until the next billing cycle or until you upgrade". The page also uses both "profiles" and "active profiles" for the same free plan limit without saying whether they are the same thing.

None of that is a judgement on the product, which is widely and reasonably preferred by sophisticated retention teams. On this page's stated criterion, published cost for both channels in one place, it comes second.

The questions that actually decide a combined platform

Is the consent record genuinely one record. Email consent and SMS consent are different legal things in the United States and a single contact row with two flags is the minimum. Ask to see the export format.

Can one automation send both channels, in sequence, with conditions. This is the entire reason to buy one vendor rather than two. If SMS automations live in a separate builder, you have bought two products with one invoice.

How are contacts counted for billing. Active profiles, billable contacts and subscribers are three different definitions and your bill is calculated from one of them. Omnisend says "Based on your billable contacts count". Ask what counts as billable.

What is the SMS rate at your actual volume. A published starting rate is a starting rate. Ask what it is at ten thousand messages a month and get it in writing.

The channel neither tool can report on

Both platforms measure what you send to people who already joined your list. The step before anyone joins now frequently happens inside an assistant, where a buyer asks which brands are worth considering and gets two or three names in prose. No visit, no signup form, no subscriber. If you are not named, your list growth chart does not show a dip, because nothing was lost that it was ever measuring.

AI Knows Us exists for that gap, and we are not an email or SMS platform. We send nothing and hold no list. We watch the buying questions your market asks across ChatGPT, Gemini, Perplexity, Claude and Google AI Overviews and report which answers name you, which name a rival and which name nobody. The limits to judge us on are published rather than quoted on a call. At aiknowsus.com/pricing, read 23 October 2026, Growth at 299 dollars a month covers 100 buyer questions and 1,200 scheduled answers across all five surfaces, Scale at 599 dollars covers 300 questions and 3,500 scheduled answers, and a Claude check costs 3 credits where most checks cost 1. SEO Start at 149 dollars renders zero buyer questions, zero credits and zero engines, so it does not do this job and the floor price is not the price of this work. The page also publishes a free scan, in its own words "Run a free scan on your own domain and read what the AI apps say about you today", with "No account needed".

Where a rival beats us, and it is the fact a procurement reviewer will care about most. Our rendered pricing text carries no SSO, no SOC 2, no ISO certification, no white label and no data processing agreement, checked on 21 October 2026. Vendors in our own category do publish some of those. If you are buying under a security review, that absence is the more important fact about us than anything else on this page. And one plain sequencing note: if you do not yet have an email programme at all, 11.20 dollars a month on Omnisend's published figures will return more than any measurement we sell. Build that first.

What buyers ask

One vendor or two. One, if the automations can span both channels in a single flow. Two is only better when one channel is run by a completely separate team.

Is SMS worth it for a small list. Under about a thousand opted in numbers, usually not yet. The consent work costs more than the channel returns at that size.

Can I start free and migrate. Both vendors publish a real free tier with real limits, and both are enough to prove the process. Migrating later costs you the automation build, not the data.

If the platform decision you are actually making is a broader automation one, our page on HubSpot marketing automation and the one thing its product page does not price. No other page on this site links to that one, measured on 21 October 2026 across 2,490 stored bodies (2,118 published drafts plus 372 fetched live pages) against 2,404 live pages, with my own wave excluded. 978 of those 2,404 pages, 40.7 percent, carry no inbound link from anywhere on the site, and that figure is an upper bound, because a body we cannot read cannot be counted as a linker.

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