We built a referral system that competes with Rewardful and FirstPromoter, with fraud protection and escrow no one else has.
Referbly is referral infrastructure as a service. Developer-first, API-driven, and designed so an integration takes minutes - not weeks.
Referral programs take weeks to build. And still only half-work.
Every SaaS product knows that referrals convert 3-5x better than paid traffic. But building the right infrastructure - with attribution, fraud protection, escrow and automatic payouts - is a months-long project. Existing tools like Rewardful lack API depth and fraud protection. Building your own costs 2-3 months of dev time. Referbly solves it with a single API call.
Four layers of infrastructure in one call
REST API - One endpoint
A single POST call triggers the entire referral flow: attribution, fraud check, escrow and webhook to your backend.
Real-time Fraud Scoring
Every conversion is automatically scored: self-referrals are blocked, velocity limits protect against abuse, device fingerprinting catches duplicates.
Reward Escrow
Rewards are held in escrow until the refund window closes. Customer cancels? Reward is automatically voided. You only pay for retained customers.
Webhook Pipeline
Signed webhooks delivered in real-time for every lifecycle event: conversion, payout, cancellation. With exponential retry and delivery log.
What you get immediately
Integration in under 10 minutes
One POST request in your backend. That's all it takes to trigger the entire referral flow.
await fetch("https://api.referbly.com/v1/referral/trigger", {
method: "POST",
headers: {
"Authorization": `Bearer ${process.env.REFERBLY_API_KEY}`,
"Content-Type": "application/json",
},
body: JSON.stringify({
campaign_id: "camp_abc123",
ref_code: refCode,
referee_email: user.email,
event: "signup_completed",
}),
});
// Response:
// { referral: { id, status: "pending", fraud_score: 0.04, escrow_until: "..." } }Referbly vs the alternatives
| Feature | ReferblyUs | Rewardful | FirstPromoter | Custom build |
|---|---|---|---|---|
| REST API (no widget required) | ~ | |||
| Real-time fraud scoring | ~ | |||
| Reward escrow | ~ | |||
| Webhook pipeline (signed) | ~ | |||
| No-code script tag | ||||
| Double-sided rewards | ~ | |||
| Per-conversion pricing | ||||
| Sandbox / test environment | ~ |
~ = partial support / limited feature
Want to build something similar?
SaaS, API-first product, developer tool - we've done it. From idea to live product.
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