HubSpot Public & Private App
HubSpot Public & Private App Development – Everything You Need to Know in 2025
As businesses increasingly rely on HubSpot’s CRM platform for marketing, sales, and automation, the need for custom applications that extend its core capabilities has never been greater.
Whether you want to build a public app to list on the HubSpot Marketplace or a private app tailored to your internal processes, understanding the development paths and possibilities is key.
In this post, we break down the difference between public vs private HubSpot apps, how they work, and why companies trust experts like Crowdvolley to build powerful, scalable integrations.
What is a HubSpot App?
A HubSpot app is an external application that connects with your HubSpot portal via APIs, webhooks, and OAuth authentication. These apps can enhance functionality, automate tasks, integrate third-party platforms, or even power entire business workflows.
HubSpot apps fall into two main categories:
Public HubSpot Apps
A public app is intended for use by multiple HubSpot users and is listed in the HubSpot App Marketplace. These apps must follow HubSpot’s review and publishing process.
Key Features:
- Uses private access tokens
- Simple to create from your HubSpot developer account
- Built for internal workflows or exclusive use
- Can be deployed quickly and securely
- Perfect for connecting internal systems, CRMs, or ERPs
Example Use Cases:
- Email marketing platforms integrating with HubSpot contacts
- Custom chat apps syncing conversations to CRM
- Billing tools syncing invoices and payments with deals
Crowdvolley Public App Services:
- Marketplace-ready app setup
- OAuth implementation and refresh token workflows
- Custom settings UI for user config
- Scalable API bridge with monitoring, sync logs, and CRON jobs
- App submission support + review handling
Private HubSpot Apps
A private app is developed for use within your organization or a single client’s HubSpot portal. These apps are easier and quicker to deploy since they don’t require HubSpot’s approval or listing.
Key Features:
- Syncing leads between HubSpot and your custom-built CRM
- Automated report generation from HubSpot deal stages
- Triggering WhatsApp or SMS messages based on HubSpot workflows
- Updating product inventory in HubSpot from external databases
Example Use Cases:
- Syncing leads between HubSpot and your custom-built CRM
- Automated report generation from HubSpot deal stages
- Triggering WhatsApp or SMS messages based on HubSpot workflows
- Updating product inventory in HubSpot from external databases
Crowdvolley Private App Services:
- Token-based secure API connection
- Server-side logic with Node.js, Python, or PHP
- Webhook setup for real-time sync
- Custom dashboards for status monitoring
- Hosting on AWS, Vercel, or client server
Why Choose Crowdvolley for HubSpot App Development?
At Crowdvolley, we specialize in HubSpot app development from concept to launch. Whether you’re a SaaS company building a marketplace-ready public app or a business solving internal integration challenges, we offer:
- Deep knowledge of HubSpot API, CMS, workflows, and CRM
- Clean, secure code with scalable architecture
- Real-time syncing, batch processing, and error handling
- UI/UX for app settings and embedded features
- Full documentation + ongoing support
Our HubSpot App Tech Stack
- Languages: Node.js, Python, PHP
- Databases: MySQL, MongoDB, Firebase
- Hosting: AWS, DigitalOcean, Vercel
- Frameworks: Express.js, Next.js, Serverless
- Tools: Postman, GitHub Actions, HubSpot CLI
Getting Started with Your HubSpot App
- Book a Discovery Call – Tell us what you want to build or integrate
- We Scope It Out – Define endpoints, workflows, and use cases
- Build & Test – Secure development with full sandbox testing
- Launch & Support – Deploy to production + post-launch support
FAQs
Q: How long does it take to build a HubSpot app?
A: A private app typically takes 1–2 weeks. Public apps may take 3–5 weeks including testing and HubSpot review.
Q: Do I need a HubSpot Enterprise plan to use apps?
A: No! Apps work on most HubSpot plans (including Starter), but some API limits depend on your subscription.
Q: Can I monetize my public app?
A: Absolutely. We help product teams integrate licensing, subscriptions, or user management into their public apps.
Let’s Build Your HubSpot App
Whether you’re automating internal operations or scaling your SaaS product across the HubSpot ecosystem—Crowdvolley is your development partner for HubSpot app excellence.
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