beehiiv vs Kit for Developers: API, Webhooks and Cost at Scale

If you want to create and schedule newsletter issues from your own code (a build step, a CMS hook, a cron job), Kit gets you there for less money: its V4 API can draft and schedule broadcasts, while beehiiv only lets you create posts by API on Pro, which starts at $109/mo. If you want a hosted, Substack-style publication with a 0% cut of paid subscriptions and you mostly need the API for subscriber sync, beehiiv is the better fit.

The rest of this page covers the details that decide it for developers: which plan unlocks which endpoint, how webhooks behave, rate limits, export, and what you pay as the list grows.

How we compared them

We haven’t run a production newsletter on either tool. This comparison comes from each vendor’s pricing page and developer documentation, read on 2026-10-12 and linked in the sources. We focused on what a developer wires up: API access by plan, post creation, webhooks, rate limits, custom domains, export, and price at 1,000, 10,000 and 50,000 subscribers. Where a vendor page contradicts itself or leaves something out, we say so instead of guessing.

API access: the plan matters more than the docs

beehiiv. According to the pricing page, every plan, Free included, has API access, but the Send API is only on Pro and Enterprise. The Create post endpoint says outright that it “is available to publications on the Pro and Enterprise plans.” Post creation is asynchronous: you get a 201 with a stable post id, and a fetch right afterwards can return 202 until the post exists. You can send structured blocks or raw HTML in body_content, but <style> and <link> tags are stripped, so only inline styles survive. If you render issues from Markdown in your own pipeline, plan for that.

Rate limits are per plan and per credential: 30 requests/minute on Free, 180 on Lite, 500 on Pro, 800 on Enterprise. Auth is a bearer API key, and beehiiv also supports OAuth2 for integrations.

Kit. The V4 API supports API keys for your own account and OAuth 2.0 (refresh-token and PKCE flows) for apps. Create a broadcast lets you save a draft (send_at: null), publish to the web (public: true), or schedule a send, targeting segments or tags. Rate limits depend on auth, not plan: 120 requests per rolling 60 seconds with an API key, 600 with OAuth. The bulk endpoints (bulk subscriber create, bulk tagging) need OAuth.

One catch on Kit Free. Kit’s pricing page shows a checkmark for “Get access to Kit’s API” on the Free plan. Kit’s developer docs say otherwise: the response-code page lists “being on a free account” as a cause of 401, and the webhooks error page says a free plan gets 401 on webhook endpoints. Budget for a paid plan if the API is the reason you’re choosing Kit.

Webhooks

Two practical notes. On beehiiv Lite, three webhooks goes quickly if you want separate endpoints per environment (prod, staging, a Zapier test). On Kit, build on /v4/webhook_endpoints and not the older /v4/webhooks: Kit’s docs say the legacy webhooks drop failed deliveries and don’t sign payloads. Kit also lists some events (subscriber.link_clicked, subscriber.email_opened, subscriber.product_purchased) as planned but not yet subscribable. The API rejects them with a 422 today.

Custom domains

beehiiv’s pricing page lists custom web domains on Lite, Pro and Enterprise. It contradicts itself on Free: one feature list includes “Custom Domains” while the comparison tables mark them as not included. Treat it as a paid feature unless beehiiv confirms otherwise for your account.

Kit’s pricing page says you can “customize your free Kit domain or connect your own custom domain” for landing pages, and shows that as included on Free and Creator. A custom link-tracking domain is a Pro-only feature.

Export and lock-in

beehiiv exports subscribers in a basic version (email, status, tier) or a full one (adds custom fields and stats), and exports all posts (published, archived, draft) as CSV. Download links expire after 24 hours. There is a Subscription Export API endpoint, but it covers subscribers only and is a gated feature you have to ask beehiiv to enable.

Kit’s help center covers subscriber export: first name, email, created date, status, tags, location, attribution data and custom fields, with download links that last five days. Remember to click “Select all” or you only export the current page. The export article doesn’t mention exporting broadcasts or posts, so if you need your archive portable, keep the source content in your own repo and treat Kit as the sender. That’s a reasonable pattern with either tool.

Cost at 1k, 10k and 50k subscribers

Prices are from the vendor pricing pages on 2026-10-12, in USD.

beehiiv Free costs $0 up to 2,500 subscribers, with API access at 30 requests/minute but no webhooks and no Send API.

Kit’s pricing page only shows paid prices for the 1,000-subscriber tier, so we can’t give you a verified Creator or Pro figure at 10k or 50k. Get a quote from Kit’s pricing slider or sales before you commit. Kit Free reaching 10,000 subscribers looks like a big saving, but Free has no visual automations, and per the developer docs no API or webhooks, so for a developer integration it isn’t really comparable.

What a developer setup actually costs at 1,000 subscribers:

• Push posts from code: Kit Creator at about $33/mo vs beehiiv Pro at $109/mo ($95 billed annually). Kit is roughly a third of the price.
• Subscriber sync plus webhooks only: Kit Creator at about $33/mo vs beehiiv Lite at $59/mo ($49 annually).
• Paid subscriptions: beehiiv takes 0% of subscription revenue (Stripe’s 2.9% + $0.30 still applies). Kit’s pricing page lists a fee of 3.5% + 30c per transaction and says Kit’s own share is 0.6%. At small revenue the plan price matters more than the fee.

1. Our pick

Kit

Best for creators selling digital products and paid newsletters

Pricing: Free up to 10,000 subs; paid from $33/mo (Creator)

What we like

• Free plan covers up to 10,000 subscribers
• Unlimited visual automations on Creator and Pro
• Paid newsletters and recurring subscriptions built in
• API and webhooks on paid plans

Watch out for

• No visual automations on Free
• Jumps from $0 to $169/mo (Creator) at 10,001 subscribers

Pick Kit if your newsletter is driven by your own code: you write issues in your repo, generate them in CI, and want to draft or schedule them through the API without paying for a top tier. Its webhook system is the more developer-friendly of the two (HMAC signatures, secret rotation, retries for about 41 hours, batched deliveries), and API-key rate limits don’t depend on plan. Skip it if you need verified pricing above 1,000 subscribers before you start, or you want posts exported as easily as subscribers.

2. Runner-up

beehiiv

Best for growing a paid or ad-supported newsletter

Pricing: Free up to 2,500 subs; paid from $59/mo (Lite)

What we like

• Free plan up to 2,500 subscribers
• Paid subscriptions on Lite and up, with 0% cut of subscription revenue
• API on every plan, Send API on Pro

Watch out for

• No live custom automations on Free; Lite caps at 10
• $139/mo at 10,000 subscribers on Lite (monthly billing)

Pick beehiiv if you want a hosted publication with a web archive, a 0% cut of paid subscriptions, and transparent pricing all the way to 50,000+ subscribers. The free tier is also more useful for prototyping an integration: 2,500 subscribers and read/write API access at 30 requests/minute, no card needed. Skip it if API-driven publishing is a must and $109/mo is too much at your size, or if three webhooks on Lite won’t cover your environments.

Decision rules

• You want git push to publish an issue: Kit (Creator or above). On beehiiv this requires Pro.
• You only sync signups from your app and react to events: either works. Kit is cheaper at 1k. beehiiv Lite is fine if you need three webhooks or fewer.
• You’re testing an integration on a free plan: beehiiv Free. Kit’s docs say free accounts get 401 from the API.
• You need a price you can model to 50k: beehiiv, because its pricing page publishes every tier.
• You plan to sell subscriptions at volume: beehiiv’s 0% cut beats Kit’s listed per-transaction fee as revenue grows.
• You care most about webhook reliability: Kit. Its retry policy and signatures are documented in detail.

FAQ

Does beehiiv have an API on the free plan? Yes. The pricing page lists API access on Free, excluding the Send API, at 30 requests per minute. Webhooks start on Lite, and creating posts by API needs Pro.

Can I send or schedule a Kit broadcast through the API? Yes. POST /v4/broadcasts creates a draft, a web-published post, or a scheduled send targeted by segment or tag. Your account needs a plan that includes API access. Kit’s docs say free accounts get 401.

How do beehiiv and Kit webhooks verify signatures? beehiiv sends webhooks through Svix, so you verify the svix-id, svix-timestamp and svix-signature headers with your endpoint’s secret. Kit signs deliveries with HMAC-SHA256 in the X-Kit-Signature header.

Can I export my posts from beehiiv or Kit? beehiiv exports all posts as CSV from Settings, alongside subscriber exports. Kit’s help center documents subscriber export only, so keep your own copy of issue content if portability matters.