Dev tools · alternatives · 2026
24 alternatives to Sequin – A Kafka Alternative to REST APIs
Hey HN! We're Eric, Carter, and Anthony from Sequin (https://sequin.io). Sequin streams data from platforms like Stripe, AWS, and Salesforce into messaging systems like Kafka. Sequin loads historic data into topics and then streams new changes in real-time. You can provision a stream of API data with a single POST request. This means you can add third-party data to your apps and internal tools super fast. We support streaming to Kafka and NATS. If you don’t have a messaging system, you can use our serverless hosted one. To get your data at rest, you can stream to databases like…
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Prices are shown for the 1 we have checked on their own sites, 1 of them free or with a free tier. Sequin – A Kafka Alternative to REST APIs launched in 2024; newer entries below may have overtaken it.
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- 2SU
Hi HN community, I'm Anthony, co-founder of Sequin (sequin.io), and am excited to show you what we've been working on. Sequin lets you skip HTTP APIs and integrate with Postgres and SQL instead. While we originally launched with a one-way sync from APIs to Postgres, as of today, you can now _write back_ to APIs using `insert`, `update`, and `delete` on your synced tables. We built Sequin because no one is happy with HTTP APIs today. For developers that need to build on top of third-party APIs, each integration is bespoke. There are few standards. I've personally seen over a dozen different…
2023 · its alternatives →
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Hello Everyone! We built SQLFlow as a lightweight stream processing engine. We leverage DuckDB as the stream processing engine, which gives SQLFlow the ability to process 10's of thousands of messages a second using ~250MiB of memory! DuckDB also supports a rich ecosystem of sinks and connectors! https://sql-flow.com/docs/category/tutorials/ https://github.com/turbolytics/sql-flow We were tired of running JVM's for simple stream processing, and also of bespoke one off stream processors I would love your feedback, criticisms and/or…
Dec 2025 · sql-flow.com · its alternatives →
- 5PS
Hello HN, I am Sai Srirampur, one of the Co-founders of PeerDB. (https://github.com/PeerDB-io/peerdb). We spent the past 7 months building a solid experience to replicate data from Postgres to data warehouses. Now we're expanding to queues. PeerDB Streams provides a simple and native way to replicate changes as they happen in Postgres to Queues (Kafka, Redpanda, Google PubSub, etc). We use Postgres logical decoding to enable Change Data Capture (CDC). Blog post here: https://blog.peerdb.io/peerdb-streams-simple-native-postgres.... 10-min quickstart here:…
2024 · its alternatives →
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A realtime server for the modern web
2016 · deepstream.io · its alternatives →
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Hey HN! We’re Emma and Chris, founders of Velvet (https://www.usevelvet.com). Velvet proxies OpenAI calls and stores the requests and responses in your PostgreSQL database. That way, you can analyze logs with SQL (instead of a clunky UI). You can also set headers to add caching and metadata (for analysis). Backstory: We started by building some more general AI data tools (like a text-to-SQL editor). We were frustrated by the lack of basic LLM infrastructure, so ended up pivoting to focus on the tooling we wanted. So many existing apps, like Helicone, were hard to use as power…
2024 · usevelvet.com · its alternatives →
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- 9LV
2016 · alooma.com · its alternatives →
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Goka is a compact yet powerful distributed stream processing library for Apache Kafka written in Go. - lovoo/goka
2017 · github.com · its alternatives →
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TABLUM.IO▲159Turn CSV, XML & JSON into a live analysis-ready SQL database
2023 · tablum.io · its alternatives →
- 12PD
PicoMQ is a Rust server for Durable Streams, built on Object Store. Cheap, URL-addressable, granular streams (create/append/read/long-poll/SSE), with Pico Protocol or Durable Streams Protocol as the facade. S3Stream is the stream storage primitive, used in AutoMQ, shipped as a Rust library. Coordination is a command log in Postgres.
Aug 2026 · picomq.com · its alternatives →
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Stream Postgres to Apache Iceberg on S3 via logical replication, queryable over the Postgres wire protocol. - GitHub - viggy28/streambed: Stream Postgres to Apache Iceberg on S3 via logical replication, queryable over the Postgres wire protocol.
May 2026 · github.com · its alternatives →
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Estuary Flow▲225Connect your data, where you want it, in milliseconds
2023 · estuary.dev · its alternatives →
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Simple online database service in the cloud with NoSQL, REST API, low code javascript hooks, MongoDB support and more. Perfect for API automation, custom development, enterprise, backoffice, serverless backends, database driven websites. It provides easy collaboration and data management with secure
2016 · restdb.io · its alternatives →
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Open-Source Web UI for Apache Kafka Management. Contribute to provectus/kafka-ui development by creating an account on GitHub.
2021 · github.com · its alternatives →
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This is a MVP for Serverless Postgres. 1/ It uses Fly.io[0], which can automatically pause your database after all connections are released (and start it again when new connections join). 2/ It uses Oriole[1], a Postgres extension with experimental support for S3 / Decoupled Storage[2]. 3/ It uses Tigris[3], Globally Distributed S3-Compatible Object Storage. Oriole will automatically backup the data to Tigris using background workers. I wouldn't recommend using this in production, but I think it's in a good spot to provoke some discussion and ideas. You can get it running…
2024 · github.com · its alternatives →
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Hey, I'm a co-founder at ElectricSQL. Durable Streams is the delivery protocol underneath our Postgres sync engine—we've been refining it in production for 18 months. The core idea: streams get their own URL and use opaque, monotonic offsets. Clients persist the last offset they processed and resume with "give me everything after X." No server-side session state, CDN-cacheable, plain HTTP. We kept seeing teams reinvent this for AI token streaming and real-time apps, so we're standardizing it as a standalone protocol. The repo has a reference Node.js server and TypeScript client. Would love…
Dec 2025 · github.com · its alternatives →
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Kafka 0.8.0 broker implementation on top of Cloudflare Workers - maxwellpeterson/kafka-worker
2022 · github.com · its alternatives →
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Powerful, SQL-enabled streaming platform for Apache Kafka®.
2017 · its alternatives →
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Contribute to panyam/KafkaLite development by creating an account on GitHub.
2015 · github.com · its alternatives →
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Heartbeat - Transform any REST API to a Streaming API.
2016 · heartbeat.appbase.io · its alternatives →
- 24RT
We are working on a product which makes stream processing easy for data analysts and data scientists. It’s a higher level alternative to Flink, Kafka Streams and Spark Streams. As well as making stream processing simpler, we also felt that lots of people were building these AWS stream processing platforms based on Kafka and something like Flink so wanted to offer this as a service. We would welcome any input on the space or approach: Home page: http://Timeflow.systems Demo: https://youtu.be/fGfgBaHXOkE
2020 · its alternatives →
Also compare
- Sequin alternatives
- Sequin – Use Postgres/SQL to read from and write to APIs alternatives
- Upstash alternatives
- DuckDB for Kafka Stream Processing alternatives
- Peerdb Streams – Simple, native Postgres change data capture alternatives
- Deepstream.io – open-source real-time server with pub/sub and data sync alternatives
Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →