An Amazon S3 Alternative for User Uploads

Step by step

1. Create an app

   Sign in at api.rapidfile.cc with a free Enzonic account, create an app and copy its secret key. Keep the key on your server, not in your front-end code.

2. Ask for an upload

   From your server, send the file details and the access setting to the Upload API. It returns a signed address that your browser can send the file to.

3. Send the file

   The browser uploads straight to Rapidfile, so your server never handles the bytes. Large files are uploaded in parts.

4. Get notified

   Add a webhook URL to your app to hear when an upload finishes or a file is deleted. Use the signed messages to confirm they came from Rapidfile.

Amazon S3 is object storage. You put a file into a bucket under a key, then fetch it later by that key. Many apps use it to hold user uploads such as avatars, documents, exports and videos. People start looking for an alternative for a few predictable reasons. The bill is split across storage, requests and data transfer, which makes it hard to forecast. Browser uploads need a bucket policy, a CORS configuration, IAM permissions and a server that signs requests before anything works. Some teams simply want an upload service that persists files without an account to manage on a cloud console. Rapidfile's Upload API is one option. It is persistent storage for developers' apps, with signed browser upload URLs, multipart uploads up to 50 GB, private files, webhooks and a JavaScript SDK. S3 is a much deeper platform, and this comparison tries to be fair about what you give up.

The short version

Amazon S3 figures are from AWS's pricing page as of October 2026. Rates vary by region and storage class. Plans change — check their site.

Where Amazon S3 is the stronger pick

S3 is the better choice when your files are only one part of a larger system. It works with almost every AWS service and most third-party tools. Lifecycle rules can move old uploads to cheaper storage classes or delete them on a schedule. Versioning and replication are built in, and you can choose the region where objects live. Rapidfile's documented feature set does not include storage classes or region selection, so if you need either for compliance or cost reasons, S3 covers that and this API does not.

S3 also has a long track record. AWS publishes a durability design target of 99.999999999% for S3 Standard, and it runs at a scale that few services match. If your app already runs on AWS, the costs of keeping files there are often lower than the cost of moving them. Data transfer between AWS services in the same region is a common example, and it is usually much cheaper than sending the same bytes over the internet.

Finally, S3 gives you control that a managed upload API does not. You decide exactly who can read which object, how long a presigned URL lasts and what happens when a request fails. If your team already has the expertise, that flexibility is worth the setup.

Where Rapidfile fits better

Rapidfile is designed for the case where you want user uploads to work without building that plumbing. These are the points that matter most:

• Fixed monthly tiers. Starter is $5 per month for 100 GB. Growth is $15 per month for 500 GB. Scale is $49 per month for 2 TB. You pick a tier and know the bill before the month starts. The full list is on the Upload API pricing page.
• No cloud console to learn. You sign in with a free Enzonic account, create an app and copy a secret key. There is no bucket to design, no IAM role to write and no CORS rule to debug.
• Signed upload addresses. Your server asks for an upload target, and the browser sends the file. The secret key stays on your server.
• A free tier to build with. The free plan gives you 2 GB, files up to 512 MB and three apps. That is enough to test a full upload flow before you pay.
• Unlimited CDN requests. Public files are served without a request cap, and bandwidth is free on paid tiers.
• Webhooks and an SDK. You can be notified when uploads finish, and a JavaScript SDK and an MCP server are available for developers and AI agents.

The cost of S3 for user uploads

S3 bills on several meters, and each one can grow in a different way. Storage is charged per gigabyte per month. Requests are charged separately: writes such as PUT, COPY, POST and LIST cost more than reads, and AWS lists the GET price for S3 Standard at $0.0004 per 1,000 requests. Data transfer out to the internet is charged per gigabyte once the free monthly allowance is used up.

For user uploads, the meter that surprises people is usually the download side. Every time a user opens a file, the transfer adds to the bill. Listing a large bucket to find files also adds requests. None of this makes S3 expensive for everyone. It does mean you should estimate a real workload with the AWS Pricing Calculator before you commit, and check the current storage and transfer rates for your region on AWS's site. This page does not quote those storage and transfer rates because the figures we could verify came from a third-party source, not from AWS.

Rapidfile's model is simpler. You choose a storage tier, and the free allowance is set in the plan. Bandwidth is free on paid tiers, so a file that gets downloaded many times does not change your monthly invoice in the same way.

Setup effort

Setting up S3 for browser uploads usually involves these steps: create a bucket, configure CORS so the browser can send requests, create an IAM user or role with only the permissions the app needs, write a bucket policy for private access, and write server code that generates presigned URLs with an expiry time. Many teams then add S3 event notifications or a polling job to learn when an upload finishes.

With Rapidfile, you create an app, call the Upload API from your server, send the file to the address it returns and register a webhook if you want a notification. That is fewer things to configure, though it also means fewer ways to tune the setup. If you need custom IAM policies, cross-account access or a particular storage class, S3 is the tool for that work.

Whichever service you choose, test with the files your app actually stores before you commit. Upload a typical file of each size you expect, time a full upload on a slow connection, and count how many requests one user action creates. Multiply those counts by the rates on each provider's pricing page, and add a margin for growth. That estimate will be far more reliable than any comparison table, including this one, because your own file sizes and download patterns are the numbers that drive the bill.

Which one should you use?

Choose Amazon S3 if you already run on AWS, need lifecycle rules, regions or storage classes, or want fine-grained control over every object. Choose Rapidfile's Upload API if you want predictable monthly tiers, a free tier to test with, and a service that handles signed uploads and persistence without a cloud setup project. For many small and mid-sized apps, that tradeoff is the deciding factor.

FAQ

Updated 2026-10-20