Sequenzy vs ConvertKit for Startups: Which Email Tool Fits Your Stage?
Sequenzy or ConvertKit (now Kit) for a startup? Compare free plans, prices at real list sizes, billing integrations and where each tool falls short.
For a SaaS startup that bills customers through Stripe, Paddle or Lemon Squeezy, Sequenzy is the better fit of these two tools. It prices by the number of emails sent each month and not by the number of contacts stored, it lists unlimited contacts on every plan, and it can start emails from billing and product events. Its free plan covers 2,500 emails a month, and the 15,000-email plan costs $19 a month. A company with 25,000 contacts that mails each of them twice a month sends 50,000 emails, which fits the 60,000-email plan at $49 a month. ConvertKit, which now trades as Kit, is the better choice when a startup grows mainly through a creator audience, a newsletter or opt-in pages. Its free plan covers up to 10,000 subscribers and includes forms, landing pages and broadcasts.
This page is for founders and first marketing hires at early-stage companies who need to pick one email tool now and will probably keep it for a year or more. The useful question is not which product is better in general. It is which pricing model and feature set match the way your company will grow over the next twelve months. Each section below gives the plan names, prices and billing views as published on each vendor's pricing page, and it names the limits that matter at a startup's stage. For a broader view of the category, see the full list of startup email tools.
The short comparison
The table below summarises who each tool suits, what it costs at its entry point and the main limitation to keep in mind. Prices are the ones shown on each vendor's pricing page, with the plan name, the billing view (monthly or yearly) and the list size the price applies to.
| Tool | Best for | Starting price (plan, billing view) | Key limitation |
|---|---|---|---|
| Sequenzy | SaaS startups that send onboarding, trial, billing and lifecycle email tied to product and payment events | Free plan: 2,500 emails a month. 15k emails a month plan: $19 a month, or $205 a year. | No landing pages or sign-up forms in its listed features, so sign-up forms live in your product or in another tool |
| Kit (ConvertKit) | Creator-led startups that grow through opt-in forms, landing pages, newsletters and digital products | Free plan: up to 10,000 subscribers. Creator plan: $33 a month, billed annually. | Visual Automations and email sequences need the paid Creator plan, and its listed plans do not mention payment-event triggers |
How each tool counts what you pay for
The biggest practical difference is the unit of billing. Sequenzy prices by monthly email volume and lists unlimited contacts and unlimited sending domains on every plan. What you pay for is the number of emails the system sends, including automated messages such as a welcome series or a trial reminder. A large list that receives little mail costs less on a volume plan than a small list that receives a lot.
Kit prices by subscriber count. Its free plan covers up to 10,000 subscribers and includes unlimited landing pages and forms, unlimited email broadcasts, audience tagging and segmentation, and the ability to sell digital products and subscriptions. Above that line the price depends on the subscriber count and the plan you pick. The published plan figures on Kit's pricing page are the ones quoted here, and the price for a list above 10,000 subscribers is not listed in those figures, so it is shown as pricing on request in this comparison.
The two counts grow at different speeds, which is why the choice depends on the company. A B2B product might have a few thousand users and send an onboarding series plus a monthly update. A consumer app might have a large free-user list that receives a few messages a quarter. The first company will usually find a volume-based model reasonable. The second may find Kit's free tier generous until the list passes 10,000 subscribers, and then needs to check the price for its size.
What each tool costs at realistic list sizes
The table below applies both pricing models to four scenarios. The monthly email count assumes every contact receives every scheduled send. Automated messages add to the count, so a five-email onboarding sequence adds five emails for each new contact. Sequenzy prices are shown as the monthly figure with the yearly figure in brackets. Kit prices are shown only where its published plans cover the scenario.
| Scenario | Contacts | Emails per month | Sequenzy plan and price | Kit price |
|---|---|---|---|---|
| Early beta, four sends a month | 2,000 | 8,000 (2,000 × 4) | 15k emails a month plan: $19 a month ($205 a year) | Free plan (under 10,000 subscribers), broadcasts only. Automations need Creator at $33 a month, billed annually |
| Growing list, four sends a month | 10,000 | 40,000 (10,000 × 4) | 60k emails a month plan: $49 a month ($529 a year) | Free plan at the 10,000-subscriber line, broadcasts only. Automations need Creator at $33 a month, billed annually |
| Mid-stage, two sends a month | 25,000 | 50,000 (25,000 × 2) | 60k emails a month plan: $49 a month ($529 a year) | Pricing on request, above the free plan's 10,000-subscriber limit |
| Scale-up, two sends a month | 40,000 | 80,000 (40,000 × 2) | 120k emails a month plan: $99 a month ($1,069 a year) | Pricing on request, above the free plan's 10,000-subscriber limit |
Two details change how the table reads. First, Kit's free plan does not include Visual Automations or email sequences, so the first two rows compare fairly only if you send one-off broadcasts. Once you need automated onboarding or trial reminders, the Creator plan is the relevant price: $33 a month billed annually, which comes to 33 × 12 = $396 a year. The Pro plan is $66 a month billed annually, or 66 × 12 = $792 a year. Second, the Sequenzy yearly figures are the ones shown on its pricing page for each plan. A company that expects to outgrow a plan within the year should compare the next plan up before choosing a yearly commitment.
Sequenzy for SaaS startups
Sequenzy is built around the email a software company sends because of something that happened in the product or in billing. Its feature list describes one platform for transactional and marketing email, with one API and one dashboard. For a startup that would otherwise run a transactional provider for receipts and account messages next to a separate marketing tool, that consolidation is the main reason to look at it.
The billing integrations are the feature that most separates it for this audience. Sequenzy lists connections to Stripe, Paddle, Lemon Squeezy, Polar, Creem and Dodo Payments. It also lists PostHog, Zapier, N8N workflows, custom webhooks, Supabase webhooks, Clerk auth sync, Shopify, a WooCommerce plugin and a WordPress plugin. Its feature description says each event starts the right flow for a segment built from plan, MRR and engagement data. In practice that means a trial-ending message can go only to accounts still on a trial, and a plan-upgrade prompt can go only to accounts that have reached a usage limit.
Payment failures show the value of event triggers clearly. Sequenzy lists a payment-event trigger called saas.payment_failed, and that event includes a hosted invoice URL. A hosted invoice page is where the customer can pay the invoice or update their card. The email sent after a failed charge can link straight to that page. This comparison does not give a recovery rate for such emails, because the vendor does not publish one to support a figure, and results depend on your product, your customers and your retry schedule.
Revenue attribution and goal tracking are listed among Sequenzy's features and are shown as included on each plan in its pricing table. For a founder who wants to know whether a campaign produced paying customers rather than just clicks, this is the feature to check during a trial. The AI-generated sequences and campaign drafts help with the first version of a flow. Every draft still needs a human check, particularly for prices, plan names and feature claims.
The limitations are specific. Its listed features do not include landing pages or sign-up forms, so people join your list through your product's sign-up flow or another tool. The free plan covers 2,500 emails a month, which suits a pilot or a small early list but not a newsletter with a growing audience. Plans are sized by volume, so a company that sends frequent product updates to a large base should model its monthly email count before it commits. The price points are $19 a month for the 15,000-email plan ($205 a year), $29 a month for 30,000 emails ($313 a year), $49 a month for 60,000 emails ($529 a year) and $99 a month for 120,000 emails ($1,069 a year). The full list is on the Sequenzy pricing page.
Kit for creator-led startups
Kit, formerly ConvertKit, was built for creators, and its plans reflect that. The free plan includes unlimited landing pages and forms, unlimited email broadcasts, audience tagging and segmentation, and the ability to sell digital products and subscriptions. For a startup whose early growth comes from a newsletter, a free mini-course or a downloadable template, those tools let you collect sign-ups, tag readers by interest and sell a product without a separate page builder or store.
The Creator plan adds Visual Automations, unlimited email sequences, A/B testing of subject lines, removal of Kit branding and 24/7 email and chat support. The Pro plan adds Subscriber Signals, unlimited users, deliverability reporting and a newsletter referral system. A team that wants to send an onboarding series to people who joined through a form needs the Creator plan at a minimum.
Kit is less suited to billing-driven lifecycle email. Its plan descriptions focus on broadcasts, forms, sequences and digital products, and they do not mention payment-event triggers or a billing integration. A SaaS team that wants a message when a card fails or a trial ends would need to bring those events into Kit through another route. Check Kit's current integration documentation before choosing that route, because integrations change more often than plan structures do.
Kit offers a 14-day free trial on its paid plans, and no credit card is required to start it. The paid plans shown are Creator at $33 a month billed annually and Pro at $66 a month billed annually. For a list above 10,000 subscribers, the price is not stated in the plan figures used here, so the exact figure should be taken from the Kit pricing page using your current subscriber count.
The billing side of the stack
If lifecycle email is the main use, the payment provider you use decides which events are available to trigger messages. The three providers that Sequenzy names among its integrations price their services differently, and each one has its own event model. Their pricing does not change the comparison between the two email tools, because payment fees are charged whichever email tool you pick.
- Stripe has no permanent free plan. Its standard payments pricing has no monthly platform fee, and you pay per transaction. Its payment events are the usual source for failed-charge and trial-ending emails. See the Stripe pricing page.
- Paddle works as a merchant of record. It handles billing, tax and payment collection under per-transaction pricing with no permanent free plan and no monthly platform fee. Your email triggers then follow Paddle's events. See the Paddle pricing page.
- Lemon Squeezy also works as a merchant of record. It has a $0 monthly plan, and its fees are charged per sale. It can suit a software product that wants a low fixed cost at launch. See the Lemon Squeezy pricing page.
For Sequenzy, all three providers appear in the integration list, so a team on any of them can build payment-based flows without changing its billing setup. For Kit, the payment connection needs to be checked separately, because its plan descriptions do not list one. If your company is already on one provider, that provider is usually the deciding factor for the email tool's event triggers.
Decision guide: which tool for which need
Many startup email decisions come down to one or two needs. The table below lists common needs, the tool that fits each one better and the reason. Use it as a checklist against your own roadmap.
| If you need | Pick | Because |
|---|---|---|
| Emails triggered by trials, upgrades or failed payments | Sequenzy | It connects to Stripe, Paddle and Lemon Squeezy and lists a saas.payment_failed event that includes a hosted invoice URL |
| A free plan for a list of up to 10,000 subscribers | Kit | Its free plan covers up to 10,000 subscribers. Sequenzy's free plan is limited to 2,500 emails a month |
| Opt-in forms and landing pages without a second tool | Kit | Landing pages and forms are part of its free plan. Sequenzy's listed features do not include them |
| Seeing which campaigns produced revenue | Sequenzy | Revenue attribution and goal tracking are listed among its features and shown as included on its pricing table |
| Selling a digital product to subscribers | Kit | Its free plan lists the ability to sell digital products and subscriptions |
| A large list that receives little mail | Depends on the numbers | Sequenzy charges by email volume, so a large list mailed rarely may cost less there. Kit's price above 10,000 subscribers must be read from its pricing page |
How to choose
Start with where your next customers will come from. If most of your revenue will come from people who sign up in the product, pay for a plan and then receive product and billing messages, Sequenzy is the closer match. If most of your early audience will come from a public newsletter, a content library or a lead magnet, Kit's free plan and form tools are the closer match.
Next, estimate your monthly email count for the next two quarters, not only today's list. Multiply the number of contacts who receive each send by the number of sends per month, then add the emails your automations will send to each new contact. Compare that total with the plan that covers it. The 25,000-contact example in the cost table shows the method: 25,000 contacts × 2 sends = 50,000 emails, which the 60,000-email plan covers at $49 a month.
Then decide whether you need automation on day one. Kit's free plan does not include Visual Automations or sequences, so a team that needs an onboarding series immediately should budget for the Creator plan at $33 a month billed annually. A team that only sends one-off announcements can start on the free plan and move up later.
Finally, check the features you will actually use during a trial, not only the ones on the pricing grid. Connect one billing event in Sequenzy and build one sign-up sequence in Kit. Send messages to internal addresses only, and see which workflow your team finds easier to maintain. A tool that takes an afternoon to configure for your real events is worth more than one that looks cheaper on paper.
Setup and migration checklist
The first weeks decide how clean your data will be later, whether you start fresh or move between the two tools. The table below lists the steps in order.
| Step | What to do | What to watch for |
|---|---|---|
| 1. Export contacts | Export the current list with consent status and sign-up source for each contact | Do not import a list that lacks consent information, because you will need it to show that each contact agreed to receive email |
| 2. Map segments | Map existing tags or lists to a short set such as trial, paying customer, churned and newsletter-only | Use identical names in both tools so that the segments mean the same thing during a migration |
| 3. Connect events | For Sequenzy, connect the billing provider and confirm that events arrive, including failed payments. For Kit, confirm how billing data would reach the platform | Kit's plan descriptions do not list a payment-event trigger, so plan for an extra connection |
| 4. Write the first flows | Draft a welcome email, an activation reminder, a trial-ending notice and a failed-payment message that links to the hosted invoice page | Write the flows on paper before building them, and check every price and plan name against the vendor pages |
| 5. Check segments | Send each flow to internal addresses for each segment | Confirm the right people are included and the wrong people are excluded, especially for trial and paid segments |
| 6. Switch over | Keep the old list running until the new flows have sent to a small group, then move fully | Export the old tool's suppression list so that people who unsubscribed stay unsubscribed |
| 7. Review volume monthly | For Sequenzy, track emails sent against the plan limit. For Kit, track subscriber count against the 10,000 free-plan line | Move to the next plan before the limit is reached, not after sends stop |
Lifecycle email for an early-stage SaaS product
Lifecycle email is the set of messages that follows a customer from sign-up through activation, payment, expansion and, sometimes, cancellation. For a startup it is often the most useful email the company sends, because the people receiving it have already used the product or paid for it, so the messages can be specific.
Trial and activation
A trial sequence should focus on the one action that best predicts whether a user keeps using the product. Send the first email when the account is created, with a single link to that action. Send a reminder if the action has not happened after a few days. If the tool supports event triggers, base the reminder on the event rather than the calendar. In Sequenzy, that means a flow that starts from the sign-up event and stops when the activation event fires. In Kit, the same logic can be built with tags and sequences once sign-up data has been brought in.
Trial ending and upgrade
A trial-ending message is most useful when it reflects what the account has done. A user who has used a feature several times should hear about the plan that includes it. A user who has not logged in should receive a short note with one clear next step or an option to pause. Segments built from plan and engagement data, which Sequenzy describes as a feature of its event flows, let the message change with the account's behaviour rather than sending the same text to everyone.
Failed payments
A failed payment needs a message that is quick, plain and linked to the way the customer can fix it. Sequenzy's payment-event trigger exposes a hosted invoice URL, so the email can link to the page where the customer pays or updates a card. Keep the message short, name the product and the amount, and avoid alarming wording. Send a second message only if the first has not led to a payment, and make sure the sequence stops as soon as a payment succeeds.
Win-back and cancellation
After a cancellation, a short sequence can ask why the customer left and offer a way back, such as a lower plan or a pause. Keep these messages separate from newsletters, so that a customer who stops the newsletter is not also cut off from account information. Sequenzy's single platform for transactional and marketing email makes that separation easier to manage in one place. Kit's segmentation and tagging can also keep the two apart, but the cancellation event from your product will need to be connected to it.
Frequently asked questions
Is ConvertKit still called ConvertKit?
The product now trades as Kit, and its pricing is published at kit.com/pricing. The plan names used on this page are the ones shown there. If you see the older name in older articles or tutorials, it refers to the same tool.
Which tool is cheaper for a startup with 2,000 contacts?
It depends on whether you need automation. Kit's free plan covers up to 10,000 subscribers, so a list of 2,000 costs nothing there for broadcasts. Visual Automations and sequences need the Creator plan at $33 a month billed annually. Sequenzy's 15,000-email plan costs $19 a month, or $205 a year, and supports flows based on product events. A team that sends only a few broadcasts will pay less on Kit's free plan. A team that needs automated billing and trial emails from the start should compare Sequenzy's $19 plan with Kit's Creator plan.
Does Sequenzy have a free plan?
Yes. Sequenzy's free plan includes 2,500 emails a month, with unlimited contacts and unlimited sending domains. It is an ongoing plan and not a time-limited trial. Once your monthly email count passes 2,500, you need the 15,000-email plan or a higher one.
Can Sequenzy send an email when a payment fails?
Yes. Sequenzy lists a saas.payment_failed event that includes a hosted invoice URL, which is a page where the customer can pay or update their card. You can link to that page in your message. This comparison does not give a figure for how many failed payments such emails recover, because results depend on your product and your customers.
Do I still need a separate transactional email service?
Sequenzy describes itself as one platform for transactional and marketing email, with one API and one dashboard, so it can cover both. Kit's plan descriptions focus on marketing broadcasts, sequences and digital products. If you need transactional messages such as receipts or password resets, check each tool's documentation for coverage before you decide.
Does Kit have a free trial?
Kit offers a 14-day free trial on its paid plans, and no credit card is required to start it. Its free plan is available without a trial, for up to 10,000 subscribers.
What happens when my list passes 10,000 subscribers on Kit?
The free plan covers up to 10,000 subscribers. Above that point the cost depends on the subscriber count and the plan you choose. The price for your exact list size is on the Kit pricing page, and this comparison shows it as pricing on request.
Which tool suits a SaaS team that also publishes a newsletter?
If the lifecycle emails come first, Sequenzy is the better choice for that work. If the newsletter needs its own forms, landing pages and a free tier, it can stay in a simple newsletter tool beside the product flows. Splitting the two keeps billing and onboarding messages on a platform built for them, and lets the newsletter follow its own growth path.