Web SDK
Built for In-Product Experience
Make your referral program instantly discoverable in-product. Embed sharing, rewards, and referral links - fully branded and native.
Start with referrals
A fully integrated referral experience inside your product
A fully integrated referral experience inside your product
Start with referralsInstant
Discoverability
Launchers, floating buttons, and contextual entry points make your referral program visible without disrupting your UX. No need for your users to log in to another platform.
Fully
Branded & Configurable
Customize layout, colors, copy, and structure so the widget feels like part of your product - not an add-on.
Smart
Notifications
Automatically show personalized links, offer banners, and contextual calls-to-action that match each user’s journey.
Web SDK
Built into your product
Launch and manage your referral program directly inside your web app — with one unified experience for your users.
You are in good company
Personal Links & Seamless Access
Let users share instantly - no separate signup needed
Cello automatically generates a personal referral link for every user directly in-product - no extra sign-ups or setup required. Links are instantly available in the widget and ready to share via social or mobile, making referrals frictionless at the exact moment users are ready. This reduces drop-off and drives more natural sharing from your most engaged users.
Customization & On-Brand Experience
Make the widget look and feel like your product
The widget is designed to adapt to your brand. Adjust colors, typography, copy, reward messages, and layout to create an experience that blends seamlessly with your UI. You can place the widget on any surface - as a menu item, embedded card, or dedicated referral section - giving you complete control over how referrals appear across the user journey.
Launchers & Floating Buttons
Surface your Referral Program where users already are
Cello supports multiple launchers - from menu items to floating action buttons - ensuring users can easily find the referral program at any moment. These elements are subtle, non-interruptive, and fully configurable, making referrals a natural extension of everyday product behavior.
Notifications & Alerts
Encourage sharing at high-intent moments
Cello helps you introduce sharing prompts when users reach meaningful “aha moments,” such as completing a task or receiving value. These contextual triggers significantly increase share rates because they meet users at the moment when recommending your product feels most natural.
Personalized Banners
Drive more signups with tailored offers for new users
You can display dynamic offer banners inside the widget, giving each referrer a personalized message to share. These banners communicate rewards clearly, increase motivation, and improve conversion on landing pages by making the offer feel more compelling and relevant.
Localization
Deliver a global referral experience
The in-product widget ships with built-in localization for six languages and is growing. This ensures users everywhere experience a referral journey that feels familiar and trustworthy - without extra engineering effort.
Success Stories
Discover customer success stories
How Cello helped Typeform achieve a 27.2% sharing rate through Cello
Learn how Typeform gradually rolled-out their referral program and achieve sharing rate of more ...
Smoobu significantly activates user base via referrals
Smoobu, a pioneer in the B2B SaaS vacation rental management system and acquired by HomeToGo in ...
How Cello helped Moss achieve 600% more referral ARR
Learn how Moss migrated their user referral program to Cello and boost referral ARR YoY by 600% ...