Should you build your own Sendcore?
Campaigns, automations, popups and store attribution, installed into a Shopify or WooCommerce shop
The editor is the copyable part. A coding agent will happily build a private Shopify app that pulls your products, composes an HTML campaign and sends it with your own provider key, and for one store that is genuinely useful. What does not fall out of a one-shot is everything that makes it a product a merchant can run a business on: a listed App Store app with OAuth, mandatory GDPR data webhooks and billing that lands on the merchant's own Shopify invoice, per-tenant domain authentication with the DNS handholding it needs, and the consent, suppression and bounce records that keep sending both legal and delivered. Worth saying plainly: Sendcore is small and recent, with no audience network and no proprietary dataset to hide behind. It survives on platform surface, compliance plumbing and the unglamorous backlog that only real merchant sending reveals, which is a narrower moat than Klaviyo's and an honest one.
ENOriginal research content in English. Original prompt preserved in English.
Build me a private Shopify campaign sender for one store I already own. Not a SaaS, not multi-tenant, no signup. Requirements:
- Node 22 + Fastify + better-sqlite3, server-rendered HTML, no client framework.
- Read the store with a Shopify custom app Admin API token I create myself
(read_products, read_customers, read_orders); no OAuth, no App Store install flow.
- Send through one bulk email provider with my API key and my already-authenticated
sending domain; both in .env, ship a .env.example.
- SQLite tables: contacts (email, consent state, source, created_at), products cached
from Shopify, campaigns (subject, body_html, status, sent_at), and sends
(contact_id, campaign_id, status, error).
- Every contact carries an explicit consent state. Never send to an unsubscribed or
unconsented contact, and prove that with a test.
- Every email gets a working one-click unsubscribe link plus List-Unsubscribe
headers, backed by a signed token and honoured immediately.
- The composer is a plain HTML textarea plus a product picker that inserts image,
title, price, and link from the synced cache. Render with inline styles and a
table layout so it survives Gmail and Outlook; no external stylesheets or web fonts.
- Always send a test to myself first, and require a typed confirmation of the
recipient count before any real send.
- Send in batches with retry and backoff, one send row per recipient, so a crash
resumes instead of double-sending. Report delivered and failed from the sends
table only; do not invent open or click tracking.
- CSV import and export for contacts so the data is never trapped in the app.
- Tests: the consent gate, the unsubscribe token, batch resume, and one end-to-end
campaign against a mocked provider.
- README states what this is not: no deliverability operations, no bounce or
complaint processing, no App Store distribution, no billing. Say plainly that real
volume from a cold domain lands in spam, and warmup is now the reader's job.The prompt opens pre-filled in your agent. Review it before running.
What would building your own look like?
Build a private Shopify app that syncs your products and customers, composes an HTML campaign with a product block, and sends it to a consented segment through your own email provider key.
What you will need
- Node.js 22
- SQLite
- Shopify custom app Admin API token (read_products, read_customers, read_orders)
- Bulk email provider key in .env
- A sending domain you control, with SPF and DKIM already verified
Merchants pay for the parts nobody enjoys building: staying installed and billed inside Shopify, keeping consent and suppression records defensible when a customer or a regulator asks, and getting mail into inboxes from a domain the merchant owns. The campaign editor is the part that demos well and the part an agent reproduces in an afternoon, right up to the moment other people's content meets other people's inboxes. Pasted rich text with mixed inline formatting, merge tags that must not eat the punctuation around them, product blocks that survive Outlook, automation timing that has to line up with a real order: none of these are design problems. They are a backlog you only discover by sending mail on behalf of other businesses, and grinding through it is what separates a demo from something a shop trusts with its list.
xApp Store distribution: OAuth install, app review and the mandatory GDPR data webhooks
xbilling that appears on the merchant's own Shopify invoice instead of a separate card
xdomain authentication onboarding and per-tenant sender reputation
xbounce, complaint and suppression handling
xorder-level revenue attribution and automations that fire on real store events
How much does Sendcore cost?
- Monthly billing
- $16/mo$16/mo
- Per year
- $192/yr$192/yr
- On a Brazilian card, with 3.5% IOF
- R$83.61/moR$1,003/yr
Saved to My list. You will see a notice on this site when the price changes.
You complete the purchase on Sendcore’s site. Vibe Radar does not handle payments.
| Plan | Monthly | Annual (per month) | What is included |
|---|---|---|---|
| free | $0/workspace | $0/workspace | Up to 250 contacts, 500 emails/month, email marketing/templates, essential automations, popups and signup forms. |
| standard | $16/workspace≈ $16 | - | Starting price up to 500 contacts, 6,000 emails/month, advanced segments, A/B testing, AI subject lines, prebuilt workflows. |
| pro | $59/workspace≈ $59 | - | Starting price up to 2,500 contacts, unlimited email and push, product recommendations, deliverability audit/warm-up, AI writing. |
| enterprise | $99/workspace≈ $99 | - | Up to 2,500 contacts, full CRM with customer statuses/followups/reminders, assign customers, AI health/churn. |
Free tier$0; up to 250 contacts and 500 emails/month.
Billing termsmonthly only on Shopify listing; recurring and usage-based charges billed every 30 days
Additional costsExternal charges may be billed separately from the Shopify invoice; pricing scales with contact count.
verified 2026-08-10 · source ↗
Is it cheaper to build or buy Sendcore?
Adjust the numbers: hours to build, your hourly rate, running costs and the subscription price.
Over 24 months, subscribing is cheaper.
Starting hours estimated from the analysis (one sitting for a single store; not a multi-tenant product). Does not price what you give up (support, integrations, security).
Can I rebuild Sendcore?
Not really. Sendcore’s value is not the code: the moat survives one prompt. See the honest breakdown above.
How much does Sendcore cost?
Sendcore costs about $16/mo (Standard, checked 10/20/2026), which is $192 per year.
What do I lose by replacing Sendcore?
Honestly: App Store distribution: OAuth install, app review and the mandatory GDPR data webhooks; billing that appears on the merchant's own Shopify invoice instead of a separate card; domain authentication onboarding and per-tenant sender reputation; bounce, complaint and suppression handling; order-level revenue attribution and automations that fire on real store events. If any of those are load-bearing for you, keep paying.
Is there an open-source alternative to Sendcore?
Yes: listmonk (High-performance self-hosted newsletter and mailing-list manager.), Mautic (Open-source marketing automation platform.), Keila (Open-source newsletter tool with campaigns, segments and forms.). Using prior art is also vibecoding; the prompt is for when you want it exactly your way.