Vendor guides · 10 deep dives
Automation Guides
One practical guide per platform: verified pricing, the billing axis explained, limits that bite, and a clear fit assessment.
Each guide verifies its figures against the vendor's official pricing page, explains whether you pay per email, per contact, or per profile — and what that axis does to a growing SaaS list — then assesses where the platform fits in the five-stage lifecycle. Start with our 15-tool automation comparison for the ranking, then go deep on your shortlist here. The compact numbers-only view lives in our verified pricing snapshot.
These are not feature encyclopedias. Each guide answers a buying question: what the platform costs at entry, which billing axis punishes your growth shape, which lifecycle stages it runs without glue code, and where it loses to the alternative. Where a capability is undocumented, it stays out of the guide. Where a price cannot be verified, the guide says so instead of estimating — the same rule that keeps unverifiable vendors out of the pricing snapshot.
Method · how to use these guides
How to use the guides
Most readers over-read. Ten guides exist so the index stays complete, not so you study all of them: shortlist on the homepage, budget on pricing, then read one or two guides all the way through. The guides disagree with each other on purpose — a commerce platform and a pay-per-email SaaS suite optimize for different cost curves, and the guide that hides that trade-off is marketing, not research.
All 10 guides
Brevo automation guide
Value workflows across channels.
Loops automation guide
Lean SaaS sending, shipped today.
Resend pricing guide
API sending: $20 for 50k, verified.
Customer.io pricing guide
Profiles, journeys and overages.
ActiveCampaign pricing guide
Quote tiers and send multipliers.
Mailchimp pricing guide
Contact tiers from $13, verified.
Klaviyo pricing guide
Commerce bands plus SMS credits.
Drip pricing guide
One tier, $39, unlimited sends.
MailerLite pricing guide
Comfort $12, Power $25, verified.
Kit pricing guide
Creator plans from $39 monthly.
Structure · what every guide covers
What every guide covers
- Verified pricing block: free tier, paid entry, and billing axis, each linked to the official pricing page with the check month stated.
- The billing axis explained: whether you pay per email sent, per contact stored, or per profile tracked — and what that does to a list that grows faster than revenue.
- Limits that bite: send multipliers, automation-run meters, profile definitions, overage rates, and the plan jumps that unlock basic lifecycle features.
- Lifecycle fit: where the platform stands on welcome, nurture, convert, retain, and win back — with the stages it handles poorly named outright.
- Cross-links to the board: the discussion threads worth reading before you wire each lifecycle stage the platform supports.
- Wrong-fit cases: the situations where buying this tool would be a mistake, with the guide on this site that covers the better alternative.
The 10 guides at a glance
| Tool | Best for | Pricing signal | Billing axis |
|---|---|---|---|
| Brevo | Multichannel teams bundling email, SMS, chat, and CRM | Free 300 per day; Starter $9; Standard $18 | Tiered by volume and features |
| Loops | Lean SaaS sending with a small, clean contact base | Free 1,000 contacts; paid contact tiers | Per contact; unlimited sends on paid plans |
| Resend | Engineering-owned transactional mail plus light marketing | Free 3,000 per month; Pro $20 for 50,000 | Per email volume on the API; marketing by contacts |
| Customer.io | Data-rich teams orchestrating on behavioral profiles | Trial and startup-led; from 5,000 profiles | Per profile, plus per-email overage |
| ActiveCampaign | Deep recipe libraries behind quote-based tiers | Trial-led; Starter through Enterprise quotes | Per contact; sends at 10x to 15x the contact limit |
| Mailchimp | Beginner-friendly journeys on familiar contact tiers | Free 250 contacts; from $13 | Per contact band with 10x to 15x send multipliers |
| Klaviyo | Commerce-triggered flows with email and SMS together | Free 250 profiles; email from $20 | Per profile band; SMS on separate expiring credits |
| Drip | Commerce automation on one simple tier | Trial only; $39 for 2,500 people | Per list size; unlimited sends |
| MailerLite | Careful budgets that still want full lifecycle basics | Free 250 subscribers; Comfort $12; Power $25 | Per subscriber; Comfort capped at 10x sends |
| Kit | Creator monetization with newsletter-first habits | Free to 10,000 subscribers; Creator $39 | Per subscriber; automations on paid tiers |
Signals are entry points, not quotes for your program: each figure was verified against the linked official page in September 2026 and is re-checked on the cadence described in our verification policy. The full row-by-row source list lives in the verified pricing snapshot.
Reading the billing axis column: it tells you which quantity your growth will tax. Per-email axes bill sends and ignore storage; per-contact axes bill storage and cap or meter sends; per-profile axes bill everyone you track, mailable or not. Pick the column first, then compare the dollar figures inside it — entry prices across different axes are not comparable numbers.
Routes · where to start
Reading paths by situation
Product-led SaaS
Read Customer.io first for event-driven branching, then Loops or Resend as lighter alternatives.
Newsletter with a product
Start with Kit and MailerLite for subscriber economics, then compare the total against event-driven platforms once the free list outruns the paid one.
Commerce and retail
Commerce teams should weight catalog and cart behavior over billing events: read Klaviyo and Drip first, with Brevo as the multichannel budget option. Our SaaS-weighted ranking is the wrong rubric for this path — invert it.
Developer-owned sending
When engineers own the mail, start at Resend for volume pricing, then Customer.io when profiles and journeys matter more than API ergonomics. Model twelve-month cost in pricing before committing.
Whatever the path, finish with the same two checks: confirm the billing axis against your growth shape in the pricing snapshot, and test the one workflow you cannot afford to break before the contract is signed.
Warnings · limits that bite
Limits worth checking before you buy
Send multipliers
Contact-banded platforms meter sends as a multiple of the tier — 10x on Mailchimp Essentials and ActiveCampaign Starter, up to 15x at the top. A five-email welcome series plus a weekly digest can quietly exceed a 10x cap; model lifecycle volume before picking the cheaper band, not after the throttle.
Who counts as a contact
Unsubscribed records still count on Mailchimp, cold subscribers count on Kit, dormant profiles count on Customer.io and Klaviyo bands. Active-subscriber counting on MailerLite lets you clean the list to cut the bill, while other models bill until you delete.
Feature locks on cheap tiers
Kit's free plan locks automations entirely; MailerLite Comfort caps sends; entry tiers across the market delay A/B testing, branching, or revenue reporting to the next jump. Read the feature gate list in the guide before the price column — a lifecycle program you cannot build on the tier you can afford is not a savings.
Meters you can forget
Resend bills automation runs past 10,000; Customer.io bills profiles and email overage separately; Klaviyo SMS credits expire unused. These meters sit outside the headline number, which is exactly why each guide calls them out in its limits section with the official rate beside them.
Shortcuts · quick picks
If you only read one guide
Questions · straight answers
About the guides
Which guide should I read first?
The one matching your shortlist, not the one at the top of this page. Rank candidates on the homepage comparison, model entry cost in the pricing snapshot, then read one or two guides in full. If you have no shortlist yet, read the guide for the tool you are most likely to buy and the guide for its closest rival — the disagreement between those two pages is where the real decision lives.
How is pricing inside each guide verified?
Every figure is copied from the vendor's official pricing page, linked beside the claim, and stamped with the check month — September 2026 for the current set. Scaling prices that depend on list size are labeled approximate when the vendor does not publish the grid. Our verification policy publishes the full cadence for each figure type, and the vendor page always wins when the two disagree.
How is this site funded?
Through readership, not vendors. Outbound links go to official pricing and documentation pages so every figure can be re-checked in one click. The scoring axes decide the order of every ranking, and no vendor reviews copy before it is published. The full method lives on the about page.
What if a vendor changes its prices after I read the guide?
The linked official pricing page reflects the change immediately; our guide does not. Re-check the vendor page at purchase, and if you spot the drift first, treat the guide as stale and the vendor as correct — figures are re-checked quarterly and after major announcements, not continuously. The pricing snapshot carries the same dates for quick scanning.
How do the guides differ from the homepage comparison?
The homepage ranks the tools on five weighted axes — trigger depth, lifecycle coverage, AI assistance, segmentation, pricing fairness — in roughly a screen of prose per tool. A guide goes deep on one platform: verified figures with sources, the billing axis at several list sizes, lifecycle fit stage by stage, limits with actual rates, and wrong-fit cases. Ranking tells you where to look; the guide is where the purchase decision gets made.
Why are only ten platforms covered when the homepage compares fifteen?
Ten guides ship where we can verify an official pricing page and write a full lifecycle assessment. Vendors without verifiable public figures stay out of the snapshot and the guides rather than collecting invented numbers; they remain visible in the homepage ranking with that gap stated. Completeness of the table is not worth a fabricated cell.
Do the guides cover SMS and multi-channel features?
Only where the vendor officially offers them and we can verify how they are billed — Brevo's bundled channels, Klaviyo's separate expiring SMS credits, Drip's separately billed SMS. Multi-channel capability is never assumed: where a platform is email-only in our coverage, the guide says so rather than implying channels that the vendor does not sell. Channel plans change faster than email pricing, so each guide links the official page beside any non-email claim.
Can I read a guide without buying anything yet?
Yes — most of the value is deciding what not to buy. The limits sections and wrong-fit cases are written so you can rule platforms out at your list size and cadence before any trial starts. When you do move, the verification links in each guide and the snapshot take you straight to the official page, where the live number replaces ours at the moment of purchase.
What is the best way to keep the figures fresh after I decide?
Bookmark the official pricing page linked in the guide, not the guide. Our figures are re-checked quarterly and after vendor announcements — good for research, insufficient for checkout. If you spot drift first, the vendor page wins and our page is stale until the next pass; the verification policy publishes exactly which figure types move on which cadence so you know what to re-open before an annual prepay.