One integration. Dozens of address books.
Zero hassle.
CloudSponge allows your users to share without ever needing
to remember, type, or upload emails manually.
Instantly integrate with dozens of address books
We support Gmail, Outlook.com, Yahoo and dozens more.
Absurdly easy install
Deploy in minutes, not weeks.
100% maintenance-free for you
Dedicated monitoring and support since 2010.
Fully customizable
Edit any part of the experience with our JavaScript options and callbacks.
Secure, private, and fully compliant
Audited and approved to stringent standards.
Try It With My Address Book
No sign up required.
Start With A Sandbox Account
Tinker in your test environment for
as long as you need. No credit card required.
Why do the dev teams at these world-class companies choose CloudSponge?
Because everybody hates manually adding their contacts.
None of the top referral, e-card, e-vite, or fundraising platforms make users type in emails or mess with CSV files.
Add our Address Book Widget to your recipient form and allow users to search, select and share contacts without leaving your website.
Try It With My Address BookRisk-free: your contacts will not be saved or emailed.
Because building it yourself doesn’t make any sense.
You could invest hours learning dozens of APIs and CSV formats, digging through docs, and chewing through spaghetti code…
…then play “integration whack-a-mole” every time something breaks.
Or, deploy our Address Book Widget today, go to market faster, and focus on building what users want – without ever worrying about address book integrations again.
How often do we make fixes and updates? See for yourself in our changelog.
If we were to build and maintain this technology on our own, it would likely cost us roughly 30 to 50 times the cost of using CloudSponge.
Because the ROI is massive
Here’s what happens when users don’t have to type, remember, or manually upload addresses to import their contacts…
At least two times the people are getting a referral email now...Think about that. Obviously, having CloudSponge is hugely beneficial for us.
CloudSponge has been an important driver of viral member growth because it allows those who are motivated to invite to do so in bulk.
From a development perspective it was amazing to get all the different data sources integrated into the product with just one actual development integration for our team.
Because security and privacy are too important to risk.
Your customers and their contacts are critical to your business. We take that extremely seriously.
That’s why contacts are never saved to disk.
And why we’ve implemented stringent physical, operational, and software security measures that have passed dozens of audits.
Review Our Security MeasuresCompanies from every industry
use CloudSponge to get access to their users'
address books.
Try CloudSponge for free in your
testing environment
Have a questions or prefer a guided tour?
Schedule a consultation with our Founder.