Yes, you can store Salesforce attachments in Amazon S3, but not through a native, out-of-the-box connection. Salesforce does not include built-in S3 integration, so connecting the two platforms requires a third-party app, custom API development, or a dedicated document management solution. This article breaks down how S3 storage works with Salesforce, what the risks are, and what to look for in a long-term solution.
Salesforce’s native file storage is capped, expensive to expand, and not designed to handle large volumes of documents at scale. Every Salesforce org comes with a baseline storage allocation, and once you exceed it, additional storage must be purchased at a significant cost per gigabyte. For document-intensive teams, this ceiling becomes a real operational constraint.
Beyond cost, the native storage model creates performance issues. Large file uploads slow down the platform, and retrieving documents buried across records becomes increasingly inefficient as volume grows. There is also limited flexibility in how files are organized, versioned, or archived.
For teams in real estate, retail, or media handling thousands of files per month, these limitations translate directly into operational friction and rising costs.
No, Salesforce does not offer a native, built-in integration with Amazon S3. There is no toggle or setting within Salesforce that lets you point file storage to an S3 bucket out of the box. Connecting the two requires external tooling, custom development, or a third-party application that bridges the gap.
Salesforce’s own file storage ecosystem is built around its proprietary Salesforce Files and ContentDocument objects. While the platform supports external object linking through Salesforce Files Connect, the available connectors are limited to services like SharePoint and Google Drive. Amazon S3 is not included in that native connector list.
This means any S3 integration is achieved through the Salesforce API, middleware platforms, or purpose-built document management apps that handle the connection on your behalf.
Connecting Salesforce to Amazon S3 typically follows one of three approaches: custom API development, a middleware integration platform, or a dedicated Salesforce document management application. Each path has different tradeoffs in terms of cost, complexity, and ongoing maintenance.
Whichever path you choose, you will need an active AWS account, a configured S3 bucket with appropriate permissions, and IAM credentials set up to allow Salesforce to read and write to that bucket securely.
Storing Salesforce files in Amazon S3 introduces real risks around security, compliance, and data visibility if the integration is not properly configured. S3 buckets are powerful and flexible, but that flexibility means misconfiguration can expose sensitive documents or create compliance gaps.
S3 buckets that are not correctly locked down can become publicly accessible, which is a serious risk for files containing contracts, client data, or financial records. Proper IAM policies, bucket policies, and encryption settings must be in place from the start. If a third-party app manages the connection, you need to verify how it handles authentication and whether it stores credentials securely.
Depending on your industry and region, storing documents outside of Salesforce may trigger data residency or compliance requirements. Industries like financial services, healthcare, and legal services often have strict rules about where data can be stored and who can access it. Before moving files to S3, confirm that your S3 bucket configuration and the integration layer meet the relevant regulatory standards for your sector.
There is also a practical risk around data visibility. If files live in S3 but are not properly linked back to Salesforce records, teams lose context. A contract stored in S3 with no clear connection to the related opportunity or account becomes just as hard to find as a file lost in a shared drive.
Amazon S3 is one of the strongest external storage options for Salesforce, particularly for teams that need virtually unlimited capacity, strong infrastructure reliability, and cost-effective scaling. However, whether it is the best option depends on your existing tech stack, your team’s technical resources, and how much control you want over the integration.
S3 excels at handling large file volumes efficiently. Amazon’s infrastructure offers built-in redundancy, high availability, and robust backup capabilities. For organizations already operating within the AWS ecosystem, S3 is a natural fit. Storage costs at scale are significantly lower than purchasing additional Salesforce storage, which makes it attractive for document-heavy operations in real estate, media, or retail.
That said, S3 alone is not a document management solution. It is object storage, meaning it does not provide search, version control, workflow automation, or record-level linking out of the box. Teams that need those capabilities alongside scalable storage benefit most from a solution that combines S3 as the storage backend with a Salesforce-native layer that handles organization, retrieval, and automation. You can explore the full feature set to understand what that combination looks like in practice.
A strong Salesforce document storage solution should do more than just offload files to an external location. It should integrate deeply with Salesforce records, support scalable storage, and provide the organizational structure your team needs to find and use documents efficiently without leaving the platform.
Key criteria to evaluate include:
The right solution reduces operational friction rather than adding another system to manage. Look for tools that are intuitive enough for non-technical users to adopt quickly, since a powerful system that nobody uses consistently delivers no value. Reviewing the underlying document management model behind a solution helps you understand whether it is built around a coherent strategy or just a collection of features.
Cartularius is built specifically for Salesforce and addresses the storage, organization, and workflow challenges covered throughout this article. Rather than forcing teams to choose between Salesforce’s native limits and an unstructured S3 bucket, we provide a complete document management layer that connects both.
If your team is hitting Salesforce storage limits or struggling with document chaos across records and systems, we can help. Explore our pricing to find the plan that fits your organization’s scale and needs.
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.