In most cases, yes — Amazon S3 is significantly cheaper than buying additional Salesforce file storage, often by a wide margin. Salesforce charges a premium for native file storage, while S3 pricing scales with actual usage at a fraction of the cost per gigabyte. The real question is not just price, but whether the trade-offs in workflow and access make the switch worthwhile for your team. This article walks through the cost comparison, the practical trade-offs, and when each option makes the most sense.
Salesforce includes a base allocation of file storage with every org, then charges for additional capacity in fixed increments. The base allowance is relatively modest — typically around 10 GB per org plus a small per-user allocation — and once you exceed it, purchasing more storage becomes expensive fast.
Salesforce storage costs are not billed per gigabyte in a flexible, pay-as-you-go model. Instead, you purchase storage in blocks, which means you often end up paying for capacity you have not yet used just to stay ahead of your limits. For organizations managing large volumes of contracts, project files, or media assets, this structure can become a significant recurring expense.
It is also worth noting that Salesforce distinguishes between data storage (records, objects) and file storage (attachments, documents, content files). Both have separate limits and separate overage costs, so teams dealing with document-heavy workflows can hit both ceilings simultaneously.
Amazon S3 pricing follows a pay-as-you-go model, billed per gigabyte stored per month. In the standard storage tier, costs run at roughly €0.02 to €0.025 per GB per month depending on your AWS region, with prices decreasing as your total volume grows through tiered pricing. You only pay for what you actually use.
Beyond storage, S3 also charges for data transfer and API requests, though these costs are typically minor for document management use cases. Uploading files to S3 is free; costs apply when retrieving files, but at standard usage levels these fees are a small fraction of the total storage bill.
For teams storing hundreds of gigabytes or more, the monthly S3 bill is often dramatically lower than the equivalent Salesforce storage purchase. The gap widens as volume grows, because S3 pricing tiers downward while Salesforce charges fixed block rates regardless of how efficiently you fill them.
Yes, Amazon S3 is substantially cheaper than purchasing additional Salesforce file storage for most volume levels. Salesforce charges a significant premium for native storage, while S3 delivers comparable or superior capacity at a fraction of the cost per gigabyte. For organizations with growing document repositories, the savings can be material and compound over time.
The cost advantage of S3 becomes most pronounced at scale. A team storing a few hundred gigabytes of contracts, media files, or operational records will typically pay far less per month through S3 than through equivalent Salesforce storage blocks. The flexibility of S3’s pricing model also means you are never paying for headroom you do not need.
That said, the raw storage price is only part of the total cost of ownership. Any S3 integration requires setup, ongoing management, and a reliable connection between your Salesforce environment and your S3 bucket. Those factors matter when calculating true savings, which is why the next section covers the real trade-offs.
Storing files in S3 instead of native Salesforce storage introduces trade-offs around access, user experience, and governance. The core challenge is that files stored externally are not natively part of the Salesforce record experience — without the right integration layer, users may need to leave Salesforce to find or retrieve documents, which creates friction and reduces adoption.
Key trade-offs to consider include:
None of these trade-offs are dealbreakers, but they do mean that simply pointing Salesforce at an S3 bucket is not enough. The value of S3 integration depends almost entirely on how seamlessly it is implemented.
S3 integration with Salesforce works by connecting your Salesforce org to an Amazon S3 bucket so that files can be stored externally while remaining accessible and linked within Salesforce records. When a user uploads a document in Salesforce, the file is routed to S3 rather than consuming Salesforce file storage, and a reference link is maintained on the Salesforce record so the file appears in context.
The integration typically involves an AWS account with a configured S3 bucket, IAM credentials that allow Salesforce to read and write to that bucket, and a middleware or app layer that handles the file routing logic. When done well, the experience for the end user is seamless — they upload, preview, and retrieve files directly within Salesforce without knowing or caring where the file physically lives.
Metadata is central to making this work. For files stored in S3 to remain searchable and contextually linked in Salesforce, the integration must pass relevant metadata — record ID, file type, owner, date, and any custom fields — alongside the file itself. Without strong metadata handling, files in S3 become an unstructured archive that is difficult to navigate.
Using S3 instead of native Salesforce storage makes the most sense when your organization is storing large volumes of files, frequently hitting storage limits, or managing file types that do not need to live natively inside Salesforce to be useful. It is particularly well-suited to document-intensive workflows in industries like real estate, media, automotive, and retail.
Specific scenarios where S3 is the stronger choice include:
Native Salesforce storage remains the simpler choice for smaller teams with modest file volumes, or where the overhead of managing an external integration outweighs the cost savings.
The most effective long-term strategy for managing Salesforce document storage costs combines external storage for volume with strong document governance inside Salesforce. Offloading files to S3 addresses the cost-per-gigabyte problem, but without a clear structure for how documents are organized, tagged, and retired, storage costs tend to creep back up through duplication, redundant files, and poor lifecycle management.
A sustainable approach typically involves three elements: a clear storage architecture that routes the right file types to the right location, consistent metadata standards that keep files findable regardless of where they are stored, and a regular review process that identifies outdated or duplicate documents before they accumulate. Teams that treat document storage as an ongoing operational discipline rather than a one-time infrastructure decision consistently see lower costs and better retrieval efficiency over time.
Understanding your document value model is also foundational. Not every file has the same business value, and storage decisions should reflect that. High-value, frequently accessed documents may warrant native Salesforce storage for speed and convenience, while archival or reference files are strong candidates for S3 offloading.
We built Cartularius specifically to solve the storage cost and document governance challenges that Salesforce teams face as their document volumes grow. Rather than forcing a choice between expensive native storage and a complex DIY S3 integration, Cartularius connects both environments into a single, seamless experience inside Salesforce.
Here is what that looks like in practice:
If your team is hitting Salesforce storage limits or looking to bring document costs under control in 2026, explore our full feature set or review our pricing options to find the right fit for your organization.
Install Cartularius now and experience the best Salesforce document management solution and enjoy clean and structured data and optimized processes, risk-free for 30 days.