Make Your SaaS
Fully Customizable
Empower every user to create the tools they need — directly inside your product. Without code, just prompts.
3 lines of JS · Live in days · Your source code never leaves your side
Works with any web stack
The Future of SaaS Customization Is Here
Custom.is embeds a vibe app creation layer inside your product, enabling business users to build custom features and integrations just by typing prompts. No technical skills required.
- No code exposure.
- No internal rebuilds.
- No engineering bottlenecks.
Three lines in. Infinite features out.
Quick Integration
You just need to add 3 lines of JS in your pages. Our AI will learn the structure of your app: DOM, backend routes, API.
Developer-Level Power for Every User
Your users can now do it all through plain-English prompts:
Secure by Design
Custom.is never accesses your source code. It extends your UI and calls your API safely — ensuring your product remains stable and compliant.
<script>
(async () => {
let custom = await import('https://v1.custom.is/');
custom.init({
company_token: '...'
});
})()
</script>Boost Adoption and Reduce Churn
Enhance your platform stickiness, create or expand your marketplace, and unlock new revenue by turning PS into software.
- Maximize stickiness by embedding customer-specific solutions directly into your product.
- Boost renewals and expansions by enabling extensibility at scale.
- Generate new revenue streams through ecosystem-created apps and workflows.
Everything they wanted. None of the tickets.
No technical skills required
Business users create features in natural language.
Faster time-to-value
Instant gratification, no IT bottlenecks, no wait for PS cycles or product releases.
Infinite flexibility
Build what they imagine, without waiting for your roadmap.
Ship extensibility without shipping more code.
Zero engineering burden
No new custom code to maintain. Custom.is manages all customizations.
Fewer escalations
Reduce the flood of custom feature requests.
Stronger enterprise sales
Win and retain customers with deeper personalization.
What Our Customers Say
“Custom.is let us give our top customers a safe way to build their own features. Our upsell can increase while our engineers stayed focused on core product.”
“The integration of Custom.is was super quick, even with our pretty complex tech stack. Our power users are going to love it!”
“The vibe coding trend is completely changing the game. Custom.is is becoming a key piece to stay ahead.”
Make Your SaaS Fully Customizable with AI
Try now — see it running on your own product in a 15-minute demo.
Request DemoFrequently Asked Questions
What tech stacks does Custom.is support?
Custom.is can work with any tech stack, any programming language, and any framework — as long as your product is a web app.
How long does it take to integrate into my offering?
Usually just a few days, since Custom.is takes care of the training of the AI coding agent based on your web app structure (DOM, backend routes, API).
Can I choose which parts of my product are customizable?
Yes, you can specify exactly which parts of your product are customizable.
Can I deploy Custom.is in my own infrastructure to meet compliance requirements?
Yes, we support three deployment models: SaaS, BYOC, or self-hosted.
How much does it cost?
Contact us for a demo, and we’ll provide you with a precise estimate. Pricing is usage-based, depending on the number of customers.
Let’s talk
Please feel free to contact us for any question.