ftpGrid menu
Cloud Storage With a REST API: An alternative to AWS S3
Published 2026-09-21 04:17:38.732368 by Carsten Blum
Sometimes you just need somewhere reliable to store files. Your application needs to upload a file, retrieve it later, list stored files or delete it when it is no longer needed. Perhaps another system needs to deliver files through SFTP. Maybe customers need to download generated reports through HTTPS.
AWS S3 and Azure Blob Storage are obvious choices. They are powerful, highly scalable cloud storage platforms backed by enormous cloud ecosystems. But that power also comes with complexity.
If your requirement is simply business cloud storage with a REST API, building around a hyperscale cloud platform can mean making decisions about storage services, identities, permissions, networking, access policies, lifecycle configuration and additional services before your application stores its first file. ftpGrid takes a more focused approach.
It provides managed cloud file storage with REST API access, FTP/SFTP, webhooks, automatic file retention and HTTPS file hosting in one service. It is not a replacement for everything AWS or Azure can do. It is an alternative when you do not need everything they can do.
View larger infographic (AI generated image)
What if your requirement is simply storage + API?
A surprisingly common application requirement looks like this:
Application → REST API → Cloud Storage
The application needs somewhere to put:
Customer documents
Generated PDFs
Reports
Images
Data exports
Application assets
Integration files
Backups
Files exchanged with external systems
The development team does not necessarily need a complete cloud infrastructure platform. It needs a reliable storage service with an interface the application can integrate with. With ftpGrid, the basic architecture remains deliberately simple:
Your Application → REST API → ftpGrid Storage
The application can use the API for file operations while ftpGrid provides the managed storage service behind it. This is the core idea behind using ftpGrid as application storage: Store files. Integrate your application. Skip the cloud infrastructure project.
AWS S3 and Azure Blob Storage solve a much larger problem
Amazon S3 and Azure Blob Storage are excellent services.
They are designed to operate inside much larger cloud ecosystems and support everything from simple file storage to global enterprise architectures, analytics platforms, data lakes, event-driven systems and extremely large-scale workloads. If your organization already operates heavily in AWS or Azure, using their native object storage may be the obvious choice. But not every company needs that architecture.
A business application that needs to store and retrieve files may not need the broader flexibility of a hyperscale cloud platform.
The real question is therefore not: Is ftpGrid more powerful than AWS or Azure?
It is: How much infrastructure do we actually need to solve our file storage problem?
For many business applications, the answer can be considerably less.
A more focused cloud storage model
ftpGrid is built around files and file integrations.
Instead of assembling several infrastructure components around your storage, the platform provides multiple ways of interacting with the same managed file environment.
Depending on the workflow, files can be accessed through:
REST API
FTP
SFTP
HTTPS
Direct file links
Web hosting
Cloud integrations
That makes it possible to support modern applications and traditional business integrations on the same platform.
For example:
SaaS Application → REST API → ftpGrid
while an existing ERP system uses:
ERP → SFTP → ftpGrid
and a customer receives the resulting file through:
ftpGrid → HTTPS → Customer
The technologies are different, but the storage platform is the same.
REST API for application integration
For software applications, the REST API provides the modern integration layer. Rather than mounting storage or operating an FTP client inside the application, software can interact with files through HTTPS.
This is useful for applications that need to perform operations such as:
Uploading files
Listing files
Downloading files
Deleting files
Moving files
Managing application-generated content
Building automated file workflows
This allows ftpGrid to become a storage component behind an existing application rather than requiring the application itself to manage storage infrastructure.
The REST API tutorial provides more information about building file integrations with the API.
One storage platform for modern and legacy applications
REST API access becomes particularly useful when it exists alongside traditional file transfer protocols. Most businesses do not have a completely modern application landscape. A new SaaS application may prefer a REST API. An ERP system may export files using FTP. A supplier may require SFTP. A customer may simply want an HTTPS download link. Replacing every integration with the same technology rarely makes business sense.
ftpGrid allows those interfaces to coexist.
A typical business architecture could therefore look like:
Application → REST API → ftpGrid
ERP → FTP → ftpGrid
Supplier → SFTP → ftpGrid
ftpGrid → HTTPS → Customer
This creates a bridge between existing file-based integrations and newer application architectures without requiring a separate storage platform for each use case.
React to files with webhooks
Storing a file is often only the beginning of a business process. An application may need to know when a customer uploads a document, when a supplier delivers a file or when another system creates a new export. A traditional solution is polling:
Application → Check for files → Wait → Check again
Webhooks allow the workflow to become event-driven:
File event → ftpGrid → Webhook → Application
The application can react to relevant file activity instead of continuously checking the storage service.
This is useful for workflows such as:
Starting file processing
Importing supplier data
Triggering document handling
Updating application state
Notifying downstream systems
Starting automated business processes
Combined with the REST API, webhooks allow ftpGrid to function as more than passive file storage.
Learn more about ftpGrid webhooks.
Automatic file retention without another infrastructure component
Business storage also needs lifecycle management. Temporary exports, integration files and customer documents may only need to exist for a defined period. Without a retention process, storage gradually fills with files that no longer provide business value. Self-managed solutions often handle this with scheduled scripts or cleanup jobs. ftpGrid provides automatic cleanup rules for deleting files based on age.
This can be used to:
Automatically remove temporary files
Enforce defined retention periods
Reduce unnecessary storage
Remove custom cleanup scripts
Simplify file lifecycle management
Support data minimization policies
Instead of building another process around storage, retention becomes part of the storage platform itself.
Learn more about Automation.
Store through the API, deliver through HTTPS
How a file enters storage does not have to determine how somebody accesses it later.
An application might create a PDF and upload it through the REST API. The customer receiving that PDF does not need API access, an FTP account or a special client.
The workflow can instead be:
Application → REST API → ftpGrid → HTTPS → Customer
This separation is useful for customer-facing applications, generated reports, software exports and document delivery.
Files can be made available through direct links or file hosting while the application continues managing them through the API.
That can remove the need to build a separate file delivery service alongside application storage.
Learn more about File & web Hosting.
Simpler does not mean less serious
Cloud infrastructure is sometimes associated with complexity because complex systems genuinely require complex infrastructure. But complexity is not automatically a sign of a better solution. For a business that primarily needs reliable file storage and integration, fewer infrastructure components can be an advantage.
A focused managed platform can mean:
Fewer services to configure
Less infrastructure knowledge required
Faster onboarding
Fewer operational dependencies
Less custom integration code
Clearer ownership
Easier day-to-day administration
The goal is not to remove capabilities the business needs. It is to avoid introducing capabilities and infrastructure the business does not need.
EU hosting and GDPR considerations
For European businesses, choosing storage is not only an architectural decision. Data location, access, retention and processing arrangements can also be important considerations. Using an EU-focused managed storage platform can make those discussions simpler by reducing the number of infrastructure components involved in the solution. Organizations should still evaluate their own requirements around:
GDPR
Data residency
Data Processing Agreements
Access control
Retention
Security
Customer contracts
Industry-specific regulation
No storage provider automatically makes an application GDPR compliant simply by storing data in Europe. But a simpler architecture, clear data location and defined retention can make it easier to understand and govern how business files are handled.
When AWS S3 or Azure Blob Storage is the better choice
There are many situations where AWS S3 or Azure Blob Storage is exactly the right answer. If your application is deeply integrated with AWS services, S3 may provide the natural storage layer. If your organization runs its application platform in Azure and relies heavily on Microsoft's cloud ecosystem, Azure Blob Storage may provide the best architectural fit. Hyperscale object storage is also designed for use cases and scales far beyond what many normal business applications require.
ftpGrid is aimed at a different decision:
We need reliable cloud file storage that our applications and existing business systems can easily use.
That is where a focused platform can provide value.
When ftpGrid makes sense
ftpGrid is particularly relevant when your requirements sound like:
“Our application needs somewhere to store files.”
“We need a simple REST API for file storage.”
“Our ERP still needs FTP.”
“Our partners use SFTP.”
“We want to react when files arrive.”
“Customers need secure file downloads.”
“Files should automatically disappear after a defined period.”
“We prefer EU-hosted infrastructure.”
“We don't want to build and operate another storage platform.”
In these situations, having REST API, FTP, SFTP, webhooks, retention and HTTPS delivery available as parts of the same managed service can significantly simplify the architecture.
Cloud storage without the cloud infrastructure project
Choosing cloud storage should be proportional to the problem you are trying to solve. AWS and Azure provide enormous platforms capable of supporting some of the world's most complex technology environments. But if your business requirement is simply to store files reliably and integrate them with your applications, customers and partners, you may not need an entire cloud infrastructure project. ftpGrid provides a more focused model:
REST API for applications.
FTP and SFTP for existing integrations.
Webhooks for event-driven workflows.
Automatic cleanup for file retention.
HTTPS for file delivery and hosting.
All built around managed cloud file storage.
That means development teams can focus on the application and the business workflow rather than building the infrastructure surrounding file storage. Cloud storage should be infrastructure your application can use — not another infrastructure project your team has to operate.