What is it about?
Building a website for a startup that looks amazing is not a rocket science anymore.
Who is it for?
Startups, small companies and teams, entrepreneurs and web developers.
Features
Easily find leads and customers
Send one-off and automated email, push, and in-app messages to people. Create better stories.
Acquire New Customers
Everything you need to start building – including open-source code, documentation.
Engage users
Develop across platforms
Connect with customers and grow faster
Team Inbox
Manage conversations
One place to manage and respond to all conversations with leads and users. Receive messages from leads.
“Great widgets. Great selection. Great design and easy to implement. Definitely a huge time saver for a web developer!”
Viella Malkovich
Creative Director at Johnson
Communicate Better
Built for busy small teams
Three products that can be used independently or combined together for your company’s needs.
Get Started
A better way to acquire new users
Subscriptions. Castle works with the tools and services you already use every day. What else do you need?
Learn more about subscriptionsFelxible Hours. Get started with our simple snippet of JavaScript or easy to install SDKs for iOS and Android.
Get more info about hoursFast Communication. We offer measures like 2FA and SSO to ensure the safety of your data.
Communication guidelinesEngage Visitors
Understand your audience
Early stage company? Eligible applicants get all of our products forjust $49 a month.
Developers
Entertainment
Athletes
Creators
Trusted by the world’s most innovative businesses – big and small
“Comprehensive set of startup tools for all
imaginable
entrepreneurial needs.
Create landing
pages, send emails, find freelancers. Perfect for sales, marketing, and support”
Viella Malkovich
Creative Director at Johnson
We’re hiring
We’re a team of lifelong learners. We’re equal parts left and right brained.
More About Company
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