Event-Driven Notifications

The Challenge We Solve

E-commerce brands and SaaS companies face a critical engagement problem: email open rates hover around 20%, social media algorithms throttle organic reach, and SMS costs can cripple margins at scale. Meanwhile, your customers expect instant, relevant communication.

Pushary delivers notifications straight to your customers' browsers and devices-with open rates exceeding 90% and click-through rates 7x higher than email. No app downloads required. No phone numbers needed. Just direct, immediate access to your audience.

Architecture Built for Scale

Unlike traditional notification services that buckle under pressure, Pushary is engineered from the ground up for high-volume, mission-critical delivery. Our event-driven architecture handles millions of notifications without breaking a sweat.

Apache Kafka Message Queue

Every notification flows through our Kafka-powered event stream. This isn't just a queue-it's a distributed commit log that provides at-least-once delivery guarantees. When you click "send," your notification is persisted before acknowledgment, ensuring zero message loss even during system failures.

Outbox Pattern Implementation

We use the transactional outbox pattern to guarantee consistency between your campaign creation and notification delivery. Database writes and event publishing happen atomically-your notifications are never orphaned, and duplicate sends are eliminated through idempotent processing.

Independent Worker Processing

Our dedicated worker service operates independently from the dashboard, consuming events and delivering notifications at scale. Automatic retry with exponential backoff handles transient failures gracefully. Failed messages route to a dead-letter queue for investigation without blocking the pipeline.

Real-Time Analytics

No batch jobs. No delayed reports. Every delivery, click, and dismissal updates your analytics instantly as events flow through the system. You see campaign performance in real-time, not hours later.

Enterprise-Grade Security

Security isn't an afterthought-it's foundational to our architecture.

Multi-Tenant Isolation

Each site you create receives unique VAPID cryptographic keys. This isn't shared infrastructure-your push credentials are mathematically isolated from every other customer. PostgreSQL Row-Level Security policies enforce data isolation at the database level.

Encrypted Everything

TLS 1.2+ for data in transit. AES-256 encryption for data at rest. API keys stored as secure hashes-we couldn't retrieve your keys even if we wanted to. Push notification payloads are encrypted end-to-end using the Web Push protocol.

EU-Based Infrastructure

As an Estonian company operating within the European Union, our infrastructure is hosted in Germany. Your data stays within EU borders, processed on German servers with strong data protection standards.

How It Works

Integration in Minutes

Add our SDK to your website with a few lines of JavaScript. Our service worker handles the complexity of push subscription management, permission requests, and subscription lifecycle automatically.

The Delivery Pipeline

When you send a campaign, here's what happens behind the scenes:

• Campaign is validated and notification records are created atomically
• Events are written to the outbox table within your database transaction
• Our publisher polls the outbox and streams events to Kafka
• Workers consume events and dispatch to browser push services
• Delivery status flows back, updating analytics in real-time
• User interaction events (clicks, dismissals) are tracked automatically

Scheduled Campaigns Without Cron

Schedule notifications for the future without relying on fragile cron jobs. Our scheduler continuously polls for due campaigns and initiates delivery exactly when specified-with timezone awareness for global audiences.

Platform Capabilities

Multi-Site Management

Manage notifications across multiple domains from a single dashboard. Each site operates independently with its own subscribers, campaigns, templates, and analytics. Perfect for agencies, multi-brand portfolios, or SaaS platforms serving multiple products.

Team Collaboration

Invite team members with granular role-based access control. Owners have full administrative rights. Admins manage sites and campaigns. Members create and send notifications. Viewers can only observe-ideal for stakeholders who need visibility without edit access.

Template Library

Create reusable notification templates with rich content support: titles, body text, icons, images, action buttons, and custom data payloads. Build once, deploy consistently across campaigns.

Subscriber Segmentation

Tag subscribers with custom attributes and target campaigns precisely. Filter by device type, browser, geography, custom tags, or any metadata you provide through our SDK. Send the right message to the right audience.

Comprehensive Analytics

Track what matters: delivery rates, click-through rates, dismissal patterns, subscriber growth, and campaign performance over time. Daily aggregations give you the metrics you need for data-driven decisions.

The Technology Stack

• Frontend: Next.js 16 with React Server Components for optimal performance
• Database: PostgreSQL on Neon with Drizzle ORM and Row-Level Security
• Message Queue: Apache Kafka for reliable event streaming
• Authentication: Clerk for secure identity management
• Push Protocol: W3C Web Push with VAPID authentication
• Payments: Stripe for subscription billing
• Infrastructure: Vercel (dashboard), dedicated worker services

Pricing That Scales With You

Start free with 100 subscribers and 500 notifications monthly-perfect for validating the channel. Scale to thousands of subscribers on our Starter plan at €29/month. Grow to tens of thousands with our Growth plan at €99/month. Enterprise customers get unlimited everything with custom SLAs.

No per-notification fees that punish success. No hidden charges. Predictable pricing so you can budget confidently as you grow.

The Company

Estonia's position as a global leader in digital infrastructure-home to the world's most advanced e-government systems and a thriving tech ecosystem-provides the ideal foundation for our operations. Our infrastructure is hosted in Germany, ensuring your data stays within the European Union.

Why Pushary?

No App Required

Your customers receive notifications directly in their browser-on desktop, mobile, or tablet. No app store friction. No download barriers. Just instant reach to your entire audience.

Built for Reliability

Our event-driven architecture with Kafka, the outbox pattern, and idempotent processing means your notifications are delivered reliably, every time. We handle the complexity so you can focus on your message.

Developer-Friendly

Clean APIs, comprehensive documentation, and a modern SDK make integration straightforward. Whether you're a solo developer or an enterprise team, you'll be sending notifications within the hour.

Privacy-Conscious

EU-based operations with infrastructure in Germany. Transparent data processing. Your customers' privacy is protected, and you have full control over subscriber data.

Get in Touch

Ready to transform your customer engagement? Have questions about our platform? We'd love to hear from you.

• General Inquiries: business@pushary.com
• Support: business@pushary.com
• Enterprise Sales: business@pushary.com

Follow our journey on Twitter for product updates, engineering insights, and notification best practices.