Best Email Automation Tools for SaaS
For a software company whose emails should react to what users do in the product, Customer.io is the best all-round pick on this list: Essentials costs $100 a month at 5,000 profiles and $145 at 10,000, and it bills by profile rather than by send. Loops is the cheaper, narrower choice for a small team ($99 a month at 10,000 contacts), and Userlist is the specialist when your customer is a company with several users. Below you will find costs at three list sizes, all 14 tools, which two entries are written for coaches and course sellers, and a 30-day pilot.
Our pick, and when to choose something else
Customer.io is the default because its model matches how SaaS activation works: you send it an event when a user connects an integration or invites a teammate, and the workflow reacts. The price is predictable in one specific way (profiles, with email volume of 1 million a month included on Essentials) and unpredictable in another (profiles are counted at the month's high-water mark). If neither bothers you, start there. Pick differently in these cases:
- Loops if you are a team of two to ten, want a working onboarding loop this week and prefer a $99 monthly bill at 10,000 contacts to $145.
- Userlist if the buyer is a company and success depends on several of its users completing setup; the $149 floor is justified by company-level segments.
- HubSpot if a salesperson works each trial in the CRM, and you have costed the step from $7 Starter to $800 Professional.
- Intercom if onboarding questions arrive as support chats and you want replies and help articles beside the message.
- Postmark or Resend underneath any of the above when password resets and invoices must never share a stream with promotions.
What these tools cost at 1,000, 5,000 and 10,000 contacts
Four of the tools bill by profiles or subscribers, so a like-for-like table is possible. Figures are monthly list prices read from each vendor's pricing page; the notes explain why the cheapest cell is not always the cheapest outcome.
| Tool | 1,000 contacts | 5,000 contacts | 10,000 contacts | Catch |
|---|---|---|---|---|
| Loops | Free | $48 (4,788 subscribers) | $99 | Free plan sends to your 1,000 newest contacts |
| MailerLite Comfort, billed monthly | $19 | $49 | $89 | No product-event model |
| Customer.io Essentials, billed monthly | $100 (smallest bundle is 5,000 profiles) | $100 | $145 | Deleted profiles still count that month |
| Userlist Basic | $149 (includes up to 10,000 users) | $149 | $149 | Priced per user, $10 per extra 1,000 |
| Klaviyo Email | $30 | $100 | $150 | Built for stores |
Work an example. A SaaS with 1,200 new trial signups a month that never removes anyone reaches 7,500 profiles in a little over six months. On Customer.io that is $100 + (2,500 x $0.009) = $122.50 a month. On Userlist the same list stays at $149 until it passes 10,000 users, then adds $10 for each extra 1,000. Loops's slider read $48 at 4,788 subscribers and $99 at 9,998, so 7,500 falls between those two figures; use its slider for the exact number. At 10,000 contacts the gap between Loops at $99 and Customer.io at $145 is $46 a month, or $552 a year, which is what the broader Customer.io feature set costs you.
Which entries are for coaches and course sellers
This is a SaaS list on a site that mostly covers email for coaches, course creators and consultants. If you sell programs, calls or memberships instead of software, two entries are meant for you: ActiveCampaign, for visual automations, goals and tagging, and MailerLite, for a simple and cheaper list. Both are marked in their own sections below. Kit (formerly ConvertKit), which most course sellers weigh against ActiveCampaign, is not on this page because it is not built for product events; our guides to email automation for online courses, creators and memberships cover it. The rest of this list assumes your product tells the email tool what users do, which a coaching business rarely has.
Shortlist by SaaS workflow
Customer.io: Product-event lifecycle automation
Customer.io is first because it is built around the question a SaaS team really asks: what did this account just do in the product, or fail to do? Essentials includes the visual workflow builder, transactional email on every plan, US and EU data centers and 1 million emails a month, so a growing trial funnel reaches a profile limit long before it reaches a send cap.
The meter that matters is profiles, not sends. Essentials is $100 a month for the first 5,000 profiles and adds $0.009 for each profile beyond that, so 7,500 profiles costs $100 + (2,500 x $0.009) = $122.50. The billing docs count any profile that existed at some point in the billing month, even one you delete, so a 3,000-signup import that you purge on the 30th is still on that month's invoice. Essentials does not include managed deliverability, and Premium starts at $1,000 a month billed yearly. Companies that raised under $10M can apply for 12 months free through the Startup Program.
| Best for | Pros | Cons |
|---|---|---|
| Product-event lifecycle automation | Branches on product events and attributes; transactional email on every plan; a 12-month Startup Program for companies that raised under $10M. | Profiles are billed at the month's high-water mark; needs an event contract that your engineers maintain; Essentials has no managed deliverability. |
HubSpot: CRM-connected SaaS workflows
HubSpot earns a place when your trial users are also leads that a salesperson or customer-success manager works inside a CRM. The value is the handoff: a rep sees that a trial account crossed a usage threshold, and the nurture stops the moment a deal opens, which is the step most email-only tools leave to a Zapier chain.
The tier you land on decides how much automation you get. HubSpot's pricing page limits Starter to up to 10 automated actions and makes them unlimited on Professional and Enterprise, both of which also list omni-channel marketing automation, so a long branching onboarding flow pushes you toward $800 a month or more, and the page says Marketing Hub pricing is per seat. For a ten-person SaaS that wants the CRM link but not the reporting suite, put the whole bill next to Customer.io's $145 for 10,000 profiles before you commit. HubSpot publishes a Data Processing Agreement; its pricing page does not state a hosting region, so ask if your customers require one.
| Best for | Pros | Cons |
|---|---|---|
| CRM-connected SaaS workflows | One record for marketing, sales and success; DPA published. | A jump from $7 Starter (up to 10 automated actions) to $800 Professional; automation depth depends on the tier you can afford. |
ActiveCampaign: Visual lead and lifecycle automation
ActiveCampaign is the entry here that many coaches and course sellers already know, and it suits a SaaS team whose onboarding is mostly time- and tag-based: a free-trial sequence, a webinar follow-up, a win-back flow for users who went quiet. Visual branching and goals are the draw. It is built around contact fields, tags and site tracking more than raw product events, so usage data usually arrives through a webhook, Zapier or an integration you build.
Read the plan limits before drawing the flow. Starter allows 5 actions per automation and 1 user; Plus and Pro have unlimited actions, with 1 and 3 users, and Pro adds attribution and conversion tracking. At 10,000 contacts Starter is $149 a month billed annually, a few dollars above Customer.io Essentials at $145 billed monthly, so the price argument for ActiveCampaign is the $15 start at 1,000 contacts rather than scale. Coach and course readers: this is one of the two entries on this page written for you.
| Best for | Pros | Cons |
|---|---|---|
| Visual lead and lifecycle automation | Visual branching, goals and a CRM in one tool; a $15 start at 1,000 contacts. | Starter caps each automation at 5 actions; raw product events need a webhook or an integration. |
MailerLite: Simple early-stage automations
MailerLite is for the SaaS founder whose lifecycle email is still one welcome sequence, a trial-ending reminder and a monthly update, and who would rather spend an afternoon on it than a sprint. The free plan covers up to 250 subscribers and 2,500 emails a month with 2 user seats, which is enough to run a closed beta.
The limit is behavioral depth. MailerLite lists a Stripe integration, but it is not built around a product-event model, so activation-based branching means feeding it tags through another tool. Paid monthly, Comfort is $19 at 1,000 subscribers and $89 at 10,000; Power, which adds unlimited monthly emails, is $39 and $129 at those sizes. Its pricing page says data is stored in the European Union. Coach and course readers: this is the second entry written for you, and for a list made mostly of course buyers and webinar attendees it is the cheaper of the two.
| Best for | Pros | Cons |
|---|---|---|
| Simple early-stage automations | A free tier with 2 seats; EU data storage; a low entry price. | Not built around product events; behavioral branching needs outside tooling. |
Loops: Focused startup lifecycle workflows
Loops is built for SaaS and product-led companies. Its free plan allows 4,000 sends in any rolling 30 days to your 1,000 newest contacts, every feature is included, and there is no per-seat charge. For a seed-stage team with no lifecycle specialist, that is the shortest path from an empty account to a working onboarding loop.
Paid plans scale with subscribers, from $99 a month at 10,000 contacts to $249 at 50,000, with unlimited sends to subscribers and transactional email included. Against Customer.io's $145 at 10,000 profiles, Loops costs $46 a month less, or $552 a year, in exchange for a narrower toolset: expect to move to something heavier when you need account-level logic or deep branching. The free plan adds a small Powered by Loops footer to your emails.
| Best for | Pros | Cons |
|---|---|---|
| Focused startup lifecycle workflows | Below Customer.io and Userlist at 10,000 contacts; no seat fees; transactional email included on paid plans. | Narrower than Customer.io for account-level logic; a Powered by Loops footer on the free plan. |
Userlist: SaaS user and account education
Userlist is the specialist on this list for B2B software where the customer is a company and the recipients are its users. Its segments work on users and on companies, which fixes the usual B2B onboarding mess: one champion finished setup, four colleagues did not, and the account is not yet activated.
Basic is $149 a month for up to 10,000 users plus $10 for each extra 1,000, so 18,000 users costs $229 and 32,000 costs $369. Professional is $349 at 10,000 users and adds A/B split testing and conversion goals. Every plan includes a monthly message allowance of 5 times your tracked users with a floor of 500,000 messages, and overage is $1 per 1,000 messages. A $149 floor is steep for a pre-launch product with 800 users, so Userlist makes more sense once you have paying accounts.
| Best for | Pros | Cons |
|---|---|---|
| SaaS user and account education | Users and companies are first-class segments; flat user-based pricing. | A $149 floor; Basic lacks A/B testing and conversion goals. |
Intercom: Product messaging with support context
Intercom is a support platform that also sends product messages, and that is the reason to choose it: when an onboarding email prompts a question, the reply lands in the inbox your team already works from, with the user's history beside it.
The cost is not a list-size price. Intercom charges per seat (Advanced $85 and Expert $132 a month per seat, with 20 and 50 free Lite seats), for usage such as Fin outcomes at $0.99 each, and for bulk email per send. A five-person support team on Advanced is $425 a month before any usage. Choose it when support is the center of your onboarding, and skip it if all you want is a drip sequence.
| Best for | Pros | Cons |
|---|---|---|
| Product messaging with support context | Replies and help content live beside the message; Lite seats included on Advanced and Expert. | Seat, usage and per-send charges make the bill hard to forecast; email is not its center. |
Brevo: Campaigns alongside transactional messaging
Brevo is the budget route when one account has to send both marketing and transactional email. Its free plan allows 300 sends a day and storage for up to 100,000 contacts, though marketing automation on that plan covers only 2,000 contacts.
Starter ($9) and Standard ($18) both start at 5,000 emails a month; automation, A/B testing and advanced reports are listed on Standard, and yearly billing takes 10% off. Price follows the email volume you choose rather than your list size, a different shape from Loops or Customer.io, so model your monthly sends, not your contacts. Professional starts at $499 a month and includes 10 user seats.
| Best for | Pros | Cons |
|---|---|---|
| Campaigns alongside transactional messaging | Marketing and transactional email in one account; a low entry price; SMS and WhatsApp available. | Pricing follows email volume; less event-driven than Customer.io. |
Braze: Enterprise cross-channel lifecycle programs
Braze is for companies with a mobile app or a multi-channel product, a dedicated lifecycle team and a budget conversation with a sales rep. Its pricing page says Braze bills by the volume of users engaging with your brand and offers editions matched to company maturity; it publishes no price.
For a seed-stage SaaS this is the wrong tool, and the page to read is our Customer.io vs Braze comparison, which shows where the cheaper tool runs out. Ask for a Braze quote when push, in-app and email need one orchestration layer, or when your volume makes per-profile pricing painful.
| Best for | Pros | Cons |
|---|---|---|
| Enterprise cross-channel lifecycle programs | Cross-channel orchestration at scale. | Sales-led and quote-based; far beyond what a small team needs. |
Iterable: Experiment-heavy multi-channel journeys
Iterable describes itself as an AI customer engagement platform built for enterprise scale, and its pricing page sends you to a demo instead of showing a plan. It fits a growth team that runs experiments across several channels and has analysts to read them.
For a SaaS buyer the practical test is the commitment: ask for the contact minimum, the channels included in the quote and the implementation timeline before you spend a week on a proof of concept. If those answers do not fit a team your size, Customer.io at $145 for 10,000 profiles covers the email-first version of the same job.
| Best for | Pros | Cons |
|---|---|---|
| Experiment-heavy multi-channel journeys | Experimentation tooling for large programs. | Quote-only; heavy for small teams. |
SendGrid: Developer-owned API and template infrastructure
SendGrid belongs here for the engineering-owned half of SaaS email: password resets, receipts, invite links and alerts fired from application code. Its Email API plans start at Essentials $19.95 a month and cost $34.95 at 100,000 emails, and its Marketing Campaigns product has a free plan for up to 2,000 contacts and 6,000 emails a month.
SendGrid's strength is delivery. The decision about who gets which email still lives in your code or in a separate lifecycle tool, so treat it as the pipe under Customer.io or Loops, or as a transactional-only service, and keep marketing consent logic apart from it. Email API and Marketing Campaigns are separate products with separate prices.
| Best for | Pros | Cons |
|---|---|---|
| Developer-owned API and template infrastructure | A mature API and templates; prices listed at several volumes. | Lifecycle logic is yours to build; the API and marketing products are billed separately. |
Resend: API-first onboarding and transactional delivery
Resend is the developer-friendly option for code-owned email, and it is no longer transactional-only: its pricing page has a Marketing tab, free at 1,000 contacts, with the Pro marketing plan at $40 a month for 5,000 contacts and $80 for 10,000.
On the transactional side the free plan is 3,000 emails a month with a 100-a-day cap and 3 domains; Pro is $20 for 50,000 emails and $35 for 100,000, and Scale is $90 at 100,000 and $160 at 200,000. Automations are billed at $0.0015 per run. A founder-led team that wants onboarding mail and a newsletter in one account can start here; if your lifecycle logic needs product-event branching across several weeks, compare the Marketing tab with Customer.io before deciding.
| Best for | Pros | Cons |
|---|---|---|
| API-first onboarding and transactional delivery | A simple API; a Marketing tab with a free tier; clear volume pricing. | A younger lifecycle feature set than Customer.io; you own retries, idempotency and template review. |
Postmark: Separated critical SaaS messages
Postmark is for the messages a customer must receive: password resets, invoices, security alerts. It sells one job, and its pricing page lists three plans at 10,000 emails a month (Basic $15, Pro $16.50 and Platform $18) with 45-day data retention by default.
At 50,000 emails the same plans cost $55, $60.50 and $66. Running transactional mail on its own stream protects those messages from the reputation risk of promotional sends, which is the case for pairing Postmark with Customer.io or Loops instead of choosing between them.
| Best for | Pros | Cons |
|---|---|---|
| Separated critical SaaS messages | Focused on critical email; transparent volume steps. | Not a marketing automation tool. |
Klaviyo: Commerce-aware SaaS or marketplace journeys
Klaviyo is on this list for marketplaces and SaaS products with a store inside them, where a purchase, a catalog item or an order is the event that matters. For a subscription-software company with no orders it is more tool than the job needs.
Its pricing page lists a free plan up to 250 active profiles and 500 emails a month, then Email at $30 for 1,000 profiles, $100 for 5,000 profiles and $150 for 10,000 profiles. Set that beside Customer.io Essentials at $145 and Loops at $99 for the same 10,000 people, and a SaaS buyer needs a real order-based reason to choose it.
| Best for | Pros | Cons |
|---|---|---|
| Commerce-aware SaaS or marketplace journeys | Strong on order and catalog events. | Built for stores; at 10,000 profiles it costs more than Customer.io and Loops. |
Which tool fits your situation
Find the row that sounds like your company, test the tool named there first, and check the thing in the last column before you pay for a year.
| If this describes you | Test first | Check before committing |
|---|---|---|
| Emails should react to events your app already records | Customer.io, then Loops | How quickly an event reaches the tool, and that Customer.io's billing counts profiles at the month's high-water mark |
| One customer account has several users, and the account is what activates | Userlist | That your product can send a company ID with each user; the $149 Basic floor at 10,000 users |
| You want the lowest monthly list price at 10,000 contacts | MailerLite Comfort at $89, then Loops at $99 | MailerLite has no product-event model; Loops's free plan sends only to your 1,000 newest contacts |
| A salesperson or success manager works each trial in a CRM | HubSpot | Which tier carries the automation you need: Starter allows up to 10 automated actions, Professional unlimited |
| Onboarding questions arrive as support chats | Intercom | Seats at $85 or $132 each on Advanced and Expert, plus per-send charges for bulk email |
| Password resets, invoices and security alerts must never be delayed | Postmark or Resend, with SendGrid as the third option | That marketing and transactional mail use separate streams and separate consent rules |
| Orders, catalog items or a marketplace drive the journey | Klaviyo | That a profile-based bill of $150 at 10,000 profiles fits the margin |
| You have an app, several channels and a lifecycle team | Braze or Iterable | A written quote with contact minimums and the channels included |
| You sell a course or coaching instead of software | ActiveCampaign or MailerLite | Starter's 5-action limit per automation on ActiveCampaign; MailerLite's 250-subscriber free ceiling |
A 30-day pilot for a trial-to-activation sequence
Use one journey, not a platform migration. This plan assumes a free-trial SaaS and a sequence whose job is to get a new signup to a first value event.
| Days | What you do | Done when |
|---|---|---|
| 1-3 | Name the activation event (for example, first integration connected) and the stop events: activated, upgraded, support ticket open | A product manager and a founder agree on both in one sentence each |
| 4-8 | Send an identify call and the activation event from the app to the tool; mark your own test accounts | A test account shows its attributes and the event on its timeline within minutes |
| 9-14 | Write three emails: a setup nudge on day 1, a how-to for the step most people miss on day 3, a short note from a founder on day 6 | Each email asks for one next step with one link |
| 15-18 | Build the workflow with the exits, a send window and a separate stream for transactional mail | A test user who activates on day 2 never receives the day 3 email |
| 19-23 | Send to seed inboxes and a colleague's work address; check the unsubscribe footer and link tracking | Nothing renders broken and the unsubscribe works on the first click |
| 24-30 | Turn it on for the share of new signups you choose; hold a comparable group back with no emails | You can compare how many in each group reach the activation event |
Traps when you read pilot results
| Trap | Why it misleads | Do this instead |
|---|---|---|
| Pricing today's active users | Customer.io counts a profile that existed at any point in the billing month, and trial imports inflate that count | Price the tool at your busiest month's profile count |
| Judging by opens | Apple Mail's Mail Privacy Protection loads content on receipt, so opens can be recorded without a read | Compare the share of the pilot group and the holdout group that reach the activation event |
| Piloting on a free plan | Loops's free plan sends only to your 1,000 newest contacts and adds a footer, and free tiers elsewhere drop some of the features you are trying to test | Test the plan you would actually pay for |
| Skipping the holdout | Many trial users activate without any email, so a raw activation rate proves nothing | Keep a comparable group that receives no sequence |
SaaS email mistakes that cost the most
- Sending the day 3 nudge to a user who activated on day 2 because the activation event arrived after the email was queued; test event latency with a real account before launch.
- Modeling a customer as one profile when five colleagues use the product, so one person's click stops the sequence for the other four. Userlist handles this with company segments; elsewhere you need an account attribute and a rule.
- Sending invoices and password resets through the same stream as the onboarding drip, so one promotional complaint delays a message a customer is waiting for.
- Importing your whole CRM into a profile-priced tool such as Customer.io when only trial users need the sequence.
Related reading
- Best email automation tools for SaaS onboarding, for a deeper look at first-value journeys
- Best email automation tools for B2B SaaS
- Best email automation tools for startups
- Behavioral email automation
- Email automation metrics
- Customer.io alternatives
- Userlist alternatives
- Best email automation tools for online courses
Frequently asked questions
Which email automation tool is best for a SaaS company?
Customer.io for most product-led teams, because it branches on what users do in the product, includes transactional email on every plan and bills by profile: $100 a month at 5,000 profiles and $145 at 10,000. Choose Loops when the team is small and the budget is tight ($99 a month at 10,000 contacts), and Userlist when your customer is a company with several users. The right answer changes if your support inbox is the center of onboarding (Intercom) or if sales works every trial in a CRM (HubSpot).
What does a SaaS email automation tool cost at 10,000 contacts?
From the vendors' own pricing pages: Loops $99 a month, MailerLite Comfort $89 (monthly billing), Customer.io Essentials $145, Userlist Basic $149, ActiveCampaign Starter $149 (billed annually) and Klaviyo Email $150. The cheapest line is not always the right one: Customer.io counts profiles at the month's high-water mark, Userlist's floor is $149 even at small sizes, and MailerLite is not built around product events.
Do I need a separate tool for transactional email?
Not always. Customer.io and Loops include transactional email in their plans, and Brevo and Resend cover both kinds in one account. Many teams still send password resets and invoices through Postmark or SendGrid on a separate stream, so a promotional mistake cannot slow down a message a customer is waiting for.
Can a coach or course seller use this list?
Two entries are meant for you: ActiveCampaign, for visual automations and goals, and MailerLite, for a simple, cheaper list. Customer.io, Userlist, Loops and the API tools assume your product sends events to the email tool, which a course or coaching business rarely does. Our guides to email automation for online courses and for creators cover the tools built around programs, calls and memberships.
How long should I pilot a tool before committing?
Run one journey, such as the trial-to-activation sequence in the 30-day plan above, for a full month of new signups with a holdout group that receives nothing. Compare how many in each group reach the activation event; opens and clicks only tell you whether the email arrived.