Onboard Users. Reduce Churn. Drive Upgrades.

SendX's Custom Events API lets you push product events — like plan upgrades, feature usage milestones, or trial expirations — with a single POST request to the /events endpoint. Each event can carry up to 20 key-value pairs of metadata (plan name, usage count, timestamp, etc.) for personalization. Events are ingested in real time and triggers fire within seconds. You can use these events to start drip sequences, update segments, or personalize email content with merge tags that pull in the event properties.

Yes. Use the Visual Workflow builder to create multi-step onboarding sequences triggered by signup events. You can add conditional splits based on user behavior — for example, send a different email path to users who completed setup vs. those who haven't logged in after 3 days. Each step can have its own timing and delay settings.

SendX integrates natively with Stripe for payment-triggered campaigns, Intercom for syncing customer conversations and support data, and Zapier for connecting to hundreds of other apps. The Webhook system sends real-time JSON payloads for events like opens, clicks, bounces, and contact creation — with HMAC signature verification and retry logic. You can also use the REST API to sync contact data, push custom events, and manage campaigns programmatically.

SendX segments can be built from custom events, contact properties, and engagement behavior. For example, you can create a segment of users who triggered a "plan_upgraded" event, users who haven't opened an email in 30 days, or contacts with a specific custom field value like "trial" vs. "paid." Segments are dynamic — they update automatically as new data comes in, so your campaigns always target the right audience without manual list management.

At 10,000 contacts, SendX costs $44.99/mo billed annually. ActiveCampaign Starter costs $149/mo for the same list size — SendX is 70% cheaper. Unlike ActiveCampaign, SendX includes all features on every plan with no tier gating. You get automation, segmentation, dedicated IPs, custom events API, webhooks, and the visual workflow builder on every plan. SendX also never charges for unsubscribed contacts.

SendX offers a Transactional Email addon that lets you send password resets, account notifications, and receipt emails from the same platform as your marketing campaigns. One subscriber list, one analytics dashboard, no separate transactional provider needed. You can also build automation workflows that combine transactional triggers with marketing follow-ups.

Campaign TTL (Time to Live) automatically expires unsent emails after a time window you set — hours, days, or weeks. This is useful for time-sensitive SaaS communications like limited-time upgrade offers or event invitations. If a subscriber hasn't received the email before the TTL expires, it's quietly removed from the queue. No manual cleanup, no risk of sending outdated offers.

SendX delivers to 95–98% of inboxes, powered by SendPost infrastructure. Every plan includes dedicated IP addresses, domain reputation tracking, IP reputation monitoring, and bot click filtering. The AI Deliverability Advisor flags potential issues before they affect your sends.

14-day free trial with all features included — automation, custom events API, segmentation, dedicated IPs, and integrations. No credit card required. Push your first custom event during the trial to test event-triggered workflows with your real product data.