Two-way sync
Changes in Affinity or Amazon S3 instantly reflect in both systems. No stale data, no manual imports.
Keep Affinity and Amazon S3 in sync without custom scripts. Cut weeks of integration work, eliminate silent data drift, and give your team a single, reliable source of truth.
Affinity holds the customer relationship as structured records; Amazon S3 holds the files that belong to those relationships, from contracts and proposals to signed agreements and statements of work. The two are linked in practice and disconnected in software: someone downloads a document, renames it, and uploads it to the right folder, or exports records out to storage for retention. Done by hand, files drift away from the records they belong to and copies fall out of date.
Stacksync keeps Opportunities, Field Values, Notes, Interactions in Affinity aligned with Multipart uploads, Buckets, Objects, Object metadata in Amazon S3, in real time. A new account or deal can open its own folder in Amazon S3; a document filed in Amazon S3 can surface as a link and metadata on the matching record in Affinity; and records from Affinity can be written into Amazon S3 as files or objects for backup, archival, and compliance. You choose which side owns what, and Stacksync keeps the two consistent as either one changes.
Metadata kept in Amazon S3, such as document type, review state, or whether an agreement is signed, updates a field on the matching record in Affinity, so people working the account see where the paperwork stands without opening storage.
Attachments that accumulate against a record in Affinity collect in that customer's folder in Amazon S3, so the full document history lives in one place and is reachable by anyone who needs it.
When an account or deal is created in Affinity, a matching folder or container opens in Amazon S3, named and organized the same way, so files have a home the moment they are needed.
Representative objects on each side — any object or custom field can map to any target. Schemas are auto-detected; types are converted between the two systems.
| Affinity objects | Amazon S3 objects | How this pairing syncs | |
|---|---|---|---|
| Interactions Automatically captured emails and meetings, read for activity reporting. | Object metadata System metadata (Content-Type, size, ETag, LastModified) plus user-defined x-amz-meta-* headers; user metadata is fixed at write time and only changeable by rewriting the object. | Interactions is specific to Affinity and Object metadata to Amazon S3 — each maps to any object or custom field on the other side. | |
| Reminders Follow-up tasks associated with people and organizations. | Object tags Up to 10 key-value tags per object, mutable in place via the tagging API independent of content, so classification and retention labels sync two-way without rewriting files. | Reminders is specific to Affinity and Object tags to Amazon S3 — each maps to any object or custom field on the other side. | |
| Lists Pipelines (deal flow, fundraising, portfolio) that structure most Affinity data; syncs usually target a specific list. | Object versions When bucket versioning is enabled every write creates a new version ID; prior versions and delete markers are readable for history and audit syncs. | Lists is specific to Affinity and Object versions to Amazon S3 — each maps to any object or custom field on the other side. | |
| List Entries The membership of a person, organization, or opportunity on a list, carrying its list-specific fields. | Prefixes (folders) Logical path segments in object keys used to scope a sync and to parallelize throughput, since S3 rate limits partition by prefix. | List Entries is specific to Affinity and Prefixes (folders) to Amazon S3 — each maps to any object or custom field on the other side. | |
| Persons Contact records enriched with relationship intelligence, synced with CRMs and outreach tools. | Multipart uploads In-progress large-object uploads assembled from parts; objects above ~100 MB (required above 5 GB) are written this way, and incomplete uploads persist until completed or aborted. | Persons is specific to Affinity and Multipart uploads to Amazon S3 — each maps to any object or custom field on the other side. | |
| Organizations Company records matched to accounts in other systems by domain. | Buckets Top-level, region-scoped containers that hold objects; enumerated to discover the namespaces and prefixes a sync should cover. | Organizations is specific to Affinity and Buckets to Amazon S3 — each maps to any object or custom field on the other side. |
Each direction of the sync is driven by what the source system can signal and what the destination accepts — detection, delivery, and expected latency below.
DetectionAffinity notifies Stacksync of record changes through webhook events. Webhook subscriptions for record events, supplemented by polling.
DeliveryEach detected change is written to Amazon S3 through its API, with automatic retries and rate-limit backoff.
DetectionAmazon S3 notifies Stacksync of record changes through webhook events. S3 Event Notifications push object-created, object-removed, and object-tagging events to SNS, SQS, Lambda, or EventBridge.
DeliveryEach detected change is written to Affinity through its API, with automatic retries and rate-limit backoff.
Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Affinity–Amazon S3 connection.
Changes in Affinity or Amazon S3 instantly reflect in both systems. No stale data, no manual imports.
Trigger automated workflows whenever Affinity or Amazon S3 data changes, update records, fire webhooks, or kick off sequences without brittle API scripts.
Handle millions of events per minute without losing a single Affinity or Amazon S3 record.
Track your Affinity ⇄ Amazon S3 sync health, view errors, and replay failed events in one click.
Transform legacy EDI complexity into simple database interactions between Affinity and Amazon S3.
Configure and sync within minutes, no code. Whether you sync 50k or 100M+ records, Stacksync handles the queues, infra, and plumbing. Integrations are non-invasive and need zero setup on your systems.
Authenticate Affinity and Amazon S3 with each platform's native method — OAuth, API keys, or service accounts — plus secure options like SSH tunneling, IP whitelisting, and VPC peering.
Pick the Affinity and Amazon S3 objects to sync — Stacksync auto-detects both schemas, including custom fields where the platform exposes them. Sync to existing tables, or let Stacksync create new ones with ideal data types.
Fields map automatically even when names and types differ. Stacksync handles transformation and type casting for you, zero configuration required.
Yes. Stacksync provides a managed, real-time two-way integration between Affinity and Amazon S3: authenticate both systems, choose the objects to sync (such as Affinity's Interactions and Reminders), map fields visually, and changes propagate both ways in milliseconds — no code required.
Change detection on Affinity: Webhook subscriptions for record events, supplemented by polling. On Amazon S3: S3 Event Notifications push object-created, object-removed, and object-tagging events to SNS, SQS, Lambda, or EventBridge; there is no modified-since query, so polling relies on each object's LastModified from ListObjectsV2. Each detected change propagates to the other side in milliseconds, with field-level conflict resolution and an inspectable event log.
On the Affinity side: Opportunities, Field Values, Notes, Interactions, plus custom fields where Affinity exposes them. On the Amazon S3 side: Multipart uploads, Buckets, Objects, Object metadata. Stacksync auto-detects both schemas and converts types between the two systems.
Yes. Each object mapping can be bidirectional or restricted to a single direction (both systems accept writes). Read-only mirrors, one-way pushes, and full two-way sync can be mixed in the same integration.
Common patterns for Affinity and Amazon S3: Document status on the record; One place for a customer's files; A folder per account or deal. Metadata kept in Amazon S3, such as document type, review state, or whether an agreement is signed, updates a field on the matching record in Affinity, so people working the account see where the paperwork stands without opening storage.
Affinity: REST API. Authentication: API key. Amazon S3: S3 REST API (also via AWS SDKs and the S3-compatible endpoint). Authentication: AWS IAM credentials — an access key ID and secret access key signed with AWS Signature Version 4; supports temporary STS credentials and cross-account IAM roles. Stacksync manages authentication, retries, and rate limits on both sides.
As a data company, we understand the importance of keeping your data secure. Stacksync is built with security best practices to keep your data safe at every layer, and is DPF-certified for US, EU, UK and CH data transfers.
Let your users access Stacksync from your centralized user management systems. Works with Okta, Azure, Google SSO and more.
Immediately get alerted about record syncing issues over email, Slack, PagerDuty and WhatsApp. Resolve issues from a centralized dashboard with retry and revert options.
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Every pair below is a real-time, two-way sync. Search all 503 integrations available for Affinity and Amazon S3.