Sequin has announced it will shut down completely on October 23, 2025. On that date, all Sequin servers will be turned off, syncs will stop, and any data stored on Sequin-hosted databases will be permanently deleted. Subscriptions have already been canceled, and refunds are being issued for annual customers.
This sudden shutdown leaves many teams scrambling to find a reliable alternative. If your applications or reporting pipelines depend on Sequin, you need to migrate quickly to avoid disruption.
In this guide, we explain what Sequin’s shutdown means, what to look for in a replacement, and why Estuary Flow is the best alternative for continuing and expanding your real-time data pipelines.
Sequin is shutting down on October 23, 2025. Don’t wait — create your free Estuary Flow account.
What Was Sequin?
Sequin was a developer-focused tool that made it easy to work with SaaS data using SQL. It synced API data from platforms such as Salesforce, Stripe, or GitHub into Postgres in real time, allowing teams to query and join SaaS data as if it lived in a relational database.
In addition to reading API data, Sequin also supported two-way sync. Through its Postgres Proxy, changes made in the database could be written back to the API, keeping systems aligned. Behind the scenes, Sequin powered this functionality by mirroring API events into a hosted Kafka-based stream, which was also accessible via Kafka, REST, or webhooks.
Developers appreciated Sequin for its simplicity and speed, especially for quickly exposing SaaS data to reporting tools or building lightweight workflows without standing up heavy ETL infrastructure. However, Sequin’s scope was relatively narrow. It focused mainly on API-to-Postgres scenarios rather than broader pipelines, multi-destination data movement, real-time analytics, or enterprise-grade deployment needs.
Need the same simplicity Sequin offered, plus more? Talk to our team about how Estuary Flow can fit your workflows.
Why is Sequin Shutting Down?
On August 21, 2025, Sequin announced that it had been acquired and would be shutting down its services. The company explained that while this decision was difficult, the acquisition meant Sequin could no longer operate independently.
The timeline is short. Although all subscriptions were canceled immediately, services will continue to run until October 23, 2025. On that date, Sequin will be fully deprecated, servers will be turned off, all syncs will stop, and all hosted databases will be permanently deleted. Customers on annual plans will receive prorated refunds for unused months.
For existing users, this means there is a limited window to migrate data and reconfigure pipelines before operations come to a halt. The urgency of this timeline makes selecting the right replacement platform critical.
What to Look for in a Sequin Alternative
With Sequin shutting down, choosing the right alternative is not just about replacing functionality but ensuring long-term reliability. A strong alternative should provide:
- Real-time sync reliability: Data must move continuously without delays or gaps.
- Consistency guarantees: Look for exactly-once delivery to avoid duplicates or missing records.
- Broad connector support: Beyond API-to-Postgres, modern pipelines often require databases, warehouses, streams, and SaaS integrations.
- Built-in transformations: The ability to filter, join, or enrich data in-stream without adding extra tools.
- Analytics and AI readiness: A platform should handle not just operational syncs but also power analytics dashboards and machine learning features.
- Enterprise deployment and compliance: Options like private cloud, BYOC, and compliance with SOC 2, HIPAA, and GDPR help meet strict security requirements.
- Scalable pricing: Costs should grow predictably with usage, not spike as sync counts increase.
These criteria ensure that your new platform does more than fill the gap left by Sequin. It should become a reliable foundation for both your operational and analytical data needs.
Estuary Flow: The Best Sequin Alternative
If you are searching for a Sequin alternative, Estuary Flow is the most reliable option. While Sequin focused mainly on syncing APIs into Postgres, Estuary Flow goes further by unifying real-time data movement across databases, SaaS apps, warehouses, and streaming systems.
Key reasons why Estuary Flow is the right successor to Sequin:
- API and database syncs: Like Sequin, Estuary can sync API data into Postgres. It also supports a much wider range of connectors, including relational databases, event streams, and modern warehouses.
- Exactly-once delivery: Estuary documents an exactly-once materialization protocol that ensures no duplicates or gaps, even during failures. This level of consistency is critical for both analytics and operational workloads.
- Transformations in-stream: With built-in SQL and TypeScript derivations, you can filter, join, and enrich data while it is moving, without needing extra tools.
- Analytics and AI pipelines: Estuary supports advanced use cases such as powering dashboards in Snowflake with Snowpipe Streaming or streaming features directly into machine learning systems.
- Enterprise deployment options: Unlike Sequin, Estuary can run as Public SaaS, Private, or Bring Your Own Cloud, with support for PrivateLink and compliance with SOC 2, HIPAA, and GDPR.
- Scalable pricing: Estuary offers a pay-as-you-go model based on data volume and tasks, making it cost-effective as your data needs grow.
In addition, Estuary Flow provides a free tier where you can move up to 10 GB per month across 2 connector instances with no credit card required. This makes it simple to start migrating your Sequin syncs immediately and validate performance before upgrading.
Where Sequin solved a very specific integration problem, Estuary Flow delivers a complete real-time platform that covers Sequin’s use cases and scales far beyond them.
Prefer guidance? Talk to our experts and we’ll help you migrate before the deadline.
How to Migrate from Sequin to Estuary Flow
Sequin services will stop on October 23, 2025, so the most important step is to move your pipelines before that deadline. Estuary Flow makes it easy to capture your sources, connect Postgres or another destination, and validate your syncs in real time.
👉 Start migrating today with the Estuary free tier — move up to 10 GB per month at no cost. Create your free account
👉If you prefer white-glove support, our team can walk you through the process. Talk to our experts
Why Not Other Tools?
When evaluating Sequin alternatives, you might come across general ETL or iPaaS platforms such as Fivetran, Airbyte, or Hevo. While these tools are widely used, they are designed primarily for batch data movement, often syncing every 5 - 15 minutes, hourly, or daily. That is very different from the real-time sync experience Sequin users relied on.
Other limitations include:
- No exactly-once guarantees: Batch pipelines often create duplicates or miss updates when errors occur.
- Higher latency: Waiting minutes or hours for data is not suitable for operational or analytics use cases that need freshness.
- Extra tools for transformations: These platforms typically require dbt or other add-ons to apply business logic, while Estuary Flow supports transformations natively in SQL or TypeScript.
- Limited deployment options: Most iPaaS platforms only offer public SaaS, whereas Estuary supports Public, Private, and BYOC deployments with compliance for regulated industries.
For teams moving off Sequin, these trade-offs mean that batch-first tools are not a true replacement. Estuary Flow is the only platform that provides the same real-time sync experience you valued in Sequin, while also giving you the scalability to power analytics and AI pipelines.
Conclusion
The shutdown of Sequin on October 23, 2025 leaves customers with little time to act. Once the deadline passes, all syncs will stop and all hosted data will be deleted. If your business relies on Sequin, the safest path forward is to migrate now.
Estuary Flow is the best alternative, providing everything Sequin offered along with advanced capabilities such as exactly-once delivery, streaming ETL, transformations in SQL or TypeScript, analytics pipelines, and enterprise deployment options. Unlike batch-first tools, Flow gives you the real-time consistency you need to keep both operational and analytical systems running without disruption.
You can get started immediately with the free tier, moving up to 10 GB per month at no cost while validating your pipelines.
👉 Create your free Estuary Flow account today
👉 Talk to our team for migration support
