Sendersy
Log inGet started
Sendersy 2.0

Email broadcasts & your own SMTP
for your website and business.

Connect your domain and start emailing customers: bulk broadcasts, transactional email from your site, a visual builder, ready-made templates, automation, A/B tests and analytics — in one dashboard. Servers in the EU and Russia.

Start free — 200 emails/moDocumentation
Send your first email
# Install
npm install sendersy

# Send an email
import { Sendersy } from 'sendersy'
const sendersy = new Sendersy('sk_live_•••')

await sendersy.emails.send({
  from: 'Acme <hi@yourcompany.com>',
  to: 'user@example.com',
  subject: 'Welcome to Acme',
  html: '<p>Hi there 👋</p>',
})

Everything you need to ship email

From your first welcome email to a million transactional / month. One subscription, one dashboard.

Resend-compatible API

POST /v1/emails accepts the same fields as Resend. Migration takes 5 minutes — swap baseUrl.

Visual builder + gallery

Drag-and-drop editor with live preview. 6 production-ready starters (welcome, verify, reset, order, receipt, newsletter) — clone in one click.

Drip workflows

Trigger → wait N days → send template. PM2 worker advances every minute. Step-list UI, no graph spaghetti.

Analytics dashboard

KPI cards + SVG time-series chart (sent / delivered / opened / clicked / bounced). Per-domain + per-template breakdowns. CSV export.

Audience segmentation

Filter builder with 10 operators (contains, before, within N days, …). Live preview of matching contact count. AND/OR.

A/B testing + scheduling

Split broadcasts 50/50 by subject or template. Schedule sends to fire at a precise moment in any timezone.

Inbox-grade deliverability

Self-hosted Postal with DKIM, SPF, DMARC, MTA-STS and TLS-RPT. Built-in domain warmup. Postmaster Tools integrated.

Preference center

Recipients pick categories (transactional / marketing / newsletter) instead of all-or-nothing. Required by Gmail/Yahoo 2024.

Inbound mailboxes

Built-in Mailcow stack. Every domain gets info@ / support@ / noreply@ with a web UI and IMAP/SMTP.

Webhooks + retry log

Events for delivered/opened/clicked/bounced/complained. Delivery log UI with a replay button.

Team + roles

Invite teammates by email. Roles owner/admin/member. Audit-log of who did what.

EU + Russia residency

No US transit, no Cloudflare. Russian sole-prop entity with Roskomnadzor data-processor registration. UnitPay for RU cards.

Pricing that scales with you

Start free, pay only when you grow. Every tier includes the visual builder, analytics, Postal delivery and EU + Russia servers.

Free

For tests and side projects

$0/mo
  • 200 emails/month
  • 1 verified domain
  • Visual builder + 6 starter templates
  • Basic logs (7 days)
  • Analytics (preview)
  • Webhooks
  • Community support
Start free

Basic

For startups and indie projects

$8/mo
  • 5,000 emails/month
  • 1 verified domain
  • Visual builder + full template library
  • 14-day logs
  • Per-domain analytics
  • Webhooks + retry log
  • Drip workflows (up to 3 active)
  • Audience segmentation
  • Email support
Try Basic
Popular

Pro

For business ready to grow

$25/mo
  • 20,000 emails/month
  • Unlimited domains
  • Everything in Basic +
  • 30-day logs + full analytics
  • CSV metric export
  • Unlimited drip workflows
  • A/B testing + scheduling
  • Preference center
  • Team (up to 5)
  • Inbound mailboxes (Mailcow)
  • Priority email support
Try Pro

Business

For companies and enterprise

Pricing on request
  • Unlimited emails
  • Unlimited domains
  • Everything in Pro +
  • Unlimited teammates with roles
  • 90-day logs
  • 99.9% SLA
  • DPA + GDPR documents on request
  • Dedicated IP pool
  • Priority phone support
  • Custom integrations
Contact sales

What our customers say

Frequently asked questions

Everything about Sendersy — from technical details to compliance

General

What is Sendersy and how is it different from Resend?
Sendersy is a modern email platform: same Resend-compatible API, plus built-in visual builder, template gallery, drip workflows, A/B testing, segments, analytics, inbound mailboxes and preference center. EU + Russia residency, no US transit.
How is it different from SendGrid / Mailgun?
Modern JSON/REST API instead of legacy form-encoded. Permanent free tier of 3 000 emails/mo (not a 30-day trial). 2-4× cheaper. Visual builder included with no upcharge. EU + Russia servers for GDPR / 152-FZ.
Is it open source?
Sendersy is closed SaaS on an open-source stack: Postal (SMTP/MTA), Mailcow (inbound), PostgreSQL, Next.js. The subscription pays for UI, analytics, automation, support and infrastructure.

Pricing

How many emails are included in Free?
Up to 200 emails/month from 1 verified domain. Free is permanent — not a trial. Best for tests and side projects. When you outgrow it, upgrade to Basic at $8/mo (5,000 emails) or Pro at $25/mo (20,000 emails).
How do I pay?
International cards via UnitPay processor, also Russian cards + T-Pay in one window. No VPN needed for CIS customers. VAT-compliant receipts.
Can I get a refund?
Yes, within 3 days of payment if you haven't burned through your quota. Email support@sendersy.com and we'll refund without questions.

Deliverability

What's the deliverability like?
Self-hosted Postal with DKIM, SPF, DMARC, MTA-STS, TLS-RPT. When you add a domain, we generate the right values for every record and host the MTA-STS endpoint ourselves — you only need to publish 5-6 DNS TXT records at your registrar (we hand you ready-to-paste values). After that, automatic domain warmup, List-Unsubscribe + One-Click headers on every send (Gmail/Yahoo 2024 requirement), Postmaster Tools integrated. Warmed-up domains hit 9-10/10 on mail-tester.
What about IP reputation?
Every customer gets a dedicated pool. The reputation is yours, not shared with a noisy SMTP farm. Sendersy doesn't mix marketing and transactional traffic.
Is BIMI supported?
Yes, for verified domains with DMARC policy quarantine or reject. BIMI record is added via dashboard in a minute.

Compliance

GDPR and Russian 152-FZ compliance?
Sendersy is a registered Russian sole proprietor with Roskomnadzor data-processor registration. Customer data is stored on servers in Russia (Moscow) and the EU (Estonia). DPA in English or Russian available on request.
Where are your servers?
Primary cluster in Moscow (Postal + PostgreSQL + Next.js), secondary in Estonia (Mailcow for inbound mail). No US transit, no Cloudflare on any subdomain.
What about unsubscribe handling?
List-Unsubscribe + List-Unsubscribe-Post: One-Click is added automatically. Recipients unsubscribe in one click without a form — required by Gmail and Yahoo since Feb 2024. We also expose a preference center page for category-level opt-in.

Technical

How does the Resend-compatible API work?
POST /v1/emails accepts the same fields as Resend: from, to, subject, html, text, headers, tags. Most clients work after swapping the baseUrl to api.sendersy.com/v1. You can use the official Resend SDK with a custom baseUrl.
Are webhooks supported?
Yes — events delivered / opened / clicked / bounced / complained. HMAC-signed payloads, retry log with a replay button in the UI.
Can I import contacts from CSV?
Yes — `Import CSV` in audience detail. Map columns to email / first_name / last_name, deduplicates by email, supports metadata JSONB fields.
Didn't find your answer? Email support@sendersy.com