Sequenzy vs Loops for Startups: Which Email Tool Fits Your Stage

For a startup that already takes subscription payments through Stripe, Paddle or Lemon Squeezy, Sequenzy is the better first pick. It has a free plan for 2,500 emails a month, a paid plan at $19/mo for 15,000 emails, and payment-event triggers that start an email flow when a payment fails. Loops is the better pick for a product that is still pre-billing and mostly needs a simple lifecycle email list, since its free plan covers up to 4,000 sends in any rolling 30 days. Its first paid tier, Growing Audience, is $99/mo.

This page compares the two tools for early-stage SaaS teams. It covers what each plan includes at the list sizes startups usually reach, where each tool is weaker, how the two handle billing events, and how to move between them. Prices come from each vendor's pricing page, which is linked in every section, and were last checked on 7 October 2026. Pricing pages change, so confirm the current figure before you sign up.

The short comparison

The table below shows the main differences at a glance. Each row is a question a founder is likely to ask before opening a free account.

The most important row is the pricing basis. Sequenzy charges by how many emails you send each month and does not charge for contacts. Loops describes its paid model as contact-based while listing its tiers in sends. Before you commit to Loops, read its current pricing page to see exactly how contacts and sends are counted on the paid plan.

What each plan costs at real list sizes

Startups usually think about cost in terms of list size, but the bills depend on how many emails go out. A 10,000-contact list mailed four times a month sends 40,000 emails. The table below uses monthly sends so the numbers line up with how each vendor prices. The plan names are the ones each vendor lists.

The pattern is clear. Below 4,000 sends a month, Loops' free plan is the cheapest option and Sequenzy's free plan is larger. Between roughly 4,000 and 60,000 sends, Sequenzy costs less than Loops at every step on its published tiers. At 120,000 sends, the two entry prices match at $99/mo, but Sequenzy's yearly billing option is $1,069 and Loops' published yearly figure is not in the details we checked.

Two cost traps are worth knowing. First, sending frequency matters more than list size on Sequenzy. A 5,000-contact list receiving one weekly digest sends about 21,700 emails a month, which puts it on the 30k plan at $29/mo. The same list getting daily onboarding and product emails can reach the 120k plan. Count sends first, then pick the plan. Second, the free allowance on Loops is counted in a rolling 30-day window and applies to the 1,000 newest contacts. A startup that grows past 1,000 contacts can hit the limit faster than its total list size suggests.

Sequenzy: where it fits

Sequenzy is built for teams that want email to respond to what happens in the product and in billing. It combines transactional and marketing email in one platform, so a welcome sequence, a trial-ending reminder and a receipt can come from the same dashboard and the same bill. Its public pricing is based on monthly email volume with unlimited contacts and sending domains on every plan, which suits a startup whose list grows faster than its send count.

The strongest reason to choose Sequenzy is billing data. It lists integrations with Stripe, Paddle, Lemon Squeezy, Polar, Creem and Dodo Payments, and it can send events from your own code with a single request. Segments can be built from plan, MRR and engagement data, so a team can email customers on the Pro plan who have not logged in for two weeks without exporting a CSV every week. Revenue attribution and goal tracking are listed on the pricing page for every plan, so you can see which sequence contributed to a conversion rather than only which email was opened.

For failed payments, Sequenzy exposes a saas.payment_failed event. The payload includes a hosted invoice URL, which is the page where the customer can pay or update their card. That lets you send a payment-recovery sequence that links straight to the fix. Use the event to trigger the flow and check the result in your own billing reports. Do not assume any recovery rate; the vendor does not publish one in the material we checked.

Sequenzy is less suited to a team that wants the simplest possible interface. Its feature set is wider, so a non-technical marketer may need an hour or two to learn the automation builder and the event settings. It also asks you to think about volume. If your product sends many notifications, the send count will grow quickly, and you should model it before you choose a tier.

Loops: where it fits

Loops is a good choice for a product that is still finding its audience and wants email that is easy to set up. Its free plan lets a founder send onboarding and product-update email without paying. Early Stage includes all features, which means the free tier is not a stripped-down version of the paid product. The limit is volume: up to 4,000 sends in any rolling 30 days, to the 1,000 newest contacts, with a Loops footer in the email and a rate of 10 emails per second.

Loops is also strong for teams that prefer a clean interface and fast setup over a long list of configuration options. For a two-person startup that writes its own emails and wants a short learning curve, that is a real advantage. Its paid tier, Growing Audience at $99/mo, includes unlimited sends to subscribers and transactional sends to users outside your audience, so a product that sends password resets and receipts from the same account does not need a second service.

The main weakness for a billing-driven SaaS is the lack of published payment-event triggers in the details we checked. If your revenue depends on recovering failed payments or on sending emails the moment a plan changes, read the Loops documentation first and confirm the event and webhook support you need. Also note the price step. Once you exceed the free allowance, the next listed plan is $99/mo, which is a large jump for a company sending 5,000 to 20,000 emails a month.

Billing and lifecycle email: what to check

Lifecycle email for a SaaS product usually has three jobs: getting a new user to a first success, reminding a trialing account to convert, and recovering revenue when a payment fails. Each job depends on a different kind of data. Onboarding depends on product events. Trial reminders depend on plan and trial dates. Recovery depends on the billing provider's payment-failure event and on a page where the customer can update the card.

When you compare the two tools, test each job on paper before you commit. Ask whether the tool can start a flow from a billing event, not just from a schedule. Ask whether a segment can use plan and revenue fields, or only tags and form answers. Ask whether the payment-failure email can link to the customer's own invoice page. Sequenzy documents each of these in its integration list and event payload. For Loops, check the current docs and API reference, because the details we reviewed do not settle them.

If you already use Stripe, Paddle or Lemon Squeezy, a small test helps. Connect the billing account to a sandbox or a single segment, trigger one failed payment or one trial end, and confirm that the email arrives with the right name, plan and link. This takes less than an hour and tells you more than any feature list.

Migration and setup checklist

Whether you start on Loops and later move to Sequenzy, or start on Sequenzy and keep it, the setup steps are similar. The table covers the work that most teams skip and then regret.

Decision table: which tool for which situation

Use this table as a shortcut. It reflects the differences described above, not a score. Each row describes a situation and the tool that fits it better.

How to choose

Start with your billing. If your revenue depends on subscriptions and you already run Stripe, Paddle or Lemon Squeezy, make the billing test first. Connect a sandbox account, trigger a trial end and a failed payment, and confirm that the right email reaches the right customer. Sequenzy is the stronger candidate here because the integration and event model are documented on its site.

Next, estimate sends for the next six months, not today. Startups often add onboarding, product updates and re-engagement sequences in the same quarter, and the send count can jump by several times. Price both tools at that number. If your forecast stays under 4,000 sends a month, Loops' free plan may be enough for a while. If it passes 4,000 and stays under 60,000, Sequenzy's listed tiers give you more room at a lower step.

Finally, consider who will run the program. A solo founder who wants to write three emails and check them once a month can get value from Loops' simplicity. A team with an engineer who can send events and wants automated billing flows will usually get more from Sequenzy. Neither choice is wrong. The mistake is choosing on interface alone and discovering in month four that the tool cannot react to a payment event.

What this comparison does not cover

This page does not measure deliverability, inbox placement or open rates, and it does not claim any performance result for either tool. It also does not cover data residency or hosting regions, since the material we checked does not state them. If those matter for your company, ask each vendor directly and request the answer in writing. Pricing for SMS and MMS is listed separately on each pricing page, so check those figures before you add messaging to the plan.

If you are comparing more tools, the hub at the home page lists the other email platforms covered on this site. Each comparison uses the same method, so the prices and limits are easy to line up.