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MaterializeInc
materialize
Rust2020–2025
MaterializeInc / materialize

materialize

The live data layer for apps and AI agents. Create up-to-the-second views into your business, just using SQL

23Distinct people
42Mentions
0Explicit recommenders
6.4KGitHub stars
REPOSITORY AT A GLANCE

What to know before exploring

What it is

The live data layer for apps and AI agents. Create up-to-the-second views into your business, just using SQL

GitHub

Where it is used

No documented product use was verified in the last source check.

What people are saying

No recommendation phrase was found in the indexed comments.

No classified warning is attached to this page. Read the discussions before treating silence as approval.

Also in these discussions

Mentioned in the same Hacker News threads. That is not proof they are substitutes.

This week on Hacker News

Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 12:54:37 PM UTC.

No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.

Mentions over time

HN mentions by year42 dated mentions

Observed mentions: 2020-02-17 11:25:18 UTC to 2025-11-17 17:31:52 UTC.

0510152020-01-01 00:00:00 UTC to 2021-01-01 00:00:00 UTC (exclusive): 14 mentions; 1 submissions, 13 comments20202021-01-01 00:00:00 UTC to 2022-01-01 00:00:00 UTC (exclusive): 8 mentions; 0 submissions, 8 comments2022-01-01 00:00:00 UTC to 2023-01-01 00:00:00 UTC (exclusive): 8 mentions; 0 submissions, 8 comments20222023-01-01 00:00:00 UTC to 2024-01-01 00:00:00 UTC (exclusive): 2 mentions; 0 submissions, 2 comments2024-01-01 00:00:00 UTC to 2025-01-01 00:00:00 UTC (exclusive): 9 mentions; 1 submissions, 8 comments2025-01-01 00:00:00 UTC to 2026-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2025

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

View mention counts and date ranges
UTC ranges include their start and exclude their end. Select a period to filter the source evidence.
PeriodStart (UTC)End (exclusive, UTC)MentionsSubmissionsComments
20202020-01-01 00:00:00 UTC2021-01-01 00:00:00 UTC14113
20212021-01-01 00:00:00 UTC2022-01-01 00:00:00 UTC808
20222022-01-01 00:00:00 UTC2023-01-01 00:00:00 UTC808
20232023-01-01 00:00:00 UTC2024-01-01 00:00:00 UTC202
20242024-01-01 00:00:00 UTC2025-01-01 00:00:00 UTC918
20252025-01-01 00:00:00 UTC2026-01-01 00:00:00 UTC101

From the project README

An excerpt from the repository, fetched Nov 13, 2026.

Read the project’s introduction
Materialize is a real-time data integration platform that creates and continually updates consistent views of transactional data from across your organization. Its SQL interface democratizes the ability to serve and access live data. Materialize can be deployed anywhere your infrastructure runs. Use Materialize to do things like deliver fresh context for AI/RAG pipelines, power operational dashboards, and create more dynamic customer experiences without building time-consuming custom data pipelines. The three most common patterns for adopting Materialize are the following: Query Offload (CQRS) - Scale complex read queries more efficiently than a read replica, and without the headaches of cache invalidation. Integration Hub (ODS) - Extract, load, and incrementally transform data from multiple sources. Create live views of your data that can be queried directly or pushed downstream. Operational Data Mesh (ODM) - Use SQL to create and deliver real-time, strongly consistent data products to streamline coordination across services and domains. Get started Ready to try out Materialize? You can sign up for a free cloud trial or download our community edition, which is free forever for deployments using less than 24 GiB of memory and 48 GiB of disk! Have questions? We'd love to hear from you: Join our Slack Send us mail About Materialize focuses on providing correct and consistent answers with minimal latency, and does not ask you to accept either approximate answers or eventual consistency. This guarantee holds even when joining data from multiple upstream systems. Whenever Materialize answers a query, that answer is the correct result on some specific (and recent) version of your data. Materialize does all of this by recasting your SQL queries as dataflows, which can react efficiently to changes in your data as they happen. Our fully managed service is cloud-native, featuring high availability through multi-active replication, horizontal scalability by seamlessly scaling dataflows across multiple machines, and near-infinite storage by leveraging cloud object storage (e.g., Amazon S3). You can self-manage Materialize using our Enterprise or Community editions. We support a large fraction of PostgreSQL features and are actively expanding support for more built-in PostgreSQL functions. Please file an issue if you have an idea for an improvement! Get data in Materialize can read data directly from a PostgreSQL or MySQL replication stream, from Kafka (and other Kafka API-compatible systems like Redpanda), or from SaaS applications via webhooks. Transform, manipulate, and read your data Once you've got the data in, define views and perform reads via the PostgreSQL protocol. Use your favorite SQL client, including the psql you probably already have on your system. Customers using Materialize in production tend to use dbt Core. Materialize supports a comprehensive variety of SQL features, all using the PostgreSQL dialect and protocol: Joins, joins, joins! Materialize supports multi-column join conditions, multi-way joins, self-joins, cross-joins, inner joins, outer joins, etc. Delta-joins avoid intermediate state blowup compared to systems that can only plan nested binary joins - tested on joins of up to 64 relations. Support for subqueries. Materialize's SQL optimizer performs subquery decorrelation out-of-the-box, avoiding the need to manually rewrite subqueries into joins. Materialize can incrementally maintain views in the presence of arbitrary inserts, updates, and deletes. No asterisks. All the aggregations: min, max, count, sum, stddev, etc. HAVING ORDER BY LIMIT DISTINCT JSON support in the PostgreSQL dialect including operators and functions like ->, ->>, @>, ?, jsonb_array_element, jsonb_each. Materialize automatically plans lateral joins for efficient jsonb_each support. Nest views on views on views! Multiple views that have overlapping subplans can share underlying indices for space and compute efficiency, so just declaratively define what you want, and we'll worry about how to efficiently maintain them. We’ve also extended our SQL support to enable recursion that supports incrementally updating tree and graph structures. Just show us what it can do! Here's an example join query that works fine in Materialize, TPC-H query 15: CREATE SOURCE tpch FROM LOAD GENERATOR TPCH (SCALE FACTOR 1) FOR ALL TABLES; -- Views define commonly reused subqueries. CREATE VIEW revenue (supplier_no, total_revenue) AS SELECT l_suppkey, SUM(l_extendedprice * (1 - l_discount)) FROM lineitem WHERE l_shipdate >= DATE '1996-01-01' AND l_shipdate < DATE '1996-01-01' + INTERVAL '3' month GROUP BY l_suppkey; -- The MATERIALIZED keyword is the trigger to begin -- eagerly, consistently, and incrementally maintaining -- results that are stored directly in durable storage. CREATE MATERIALIZED VIEW tpch_q15 AS SELECT s_suppkey, s_name, s_address, s_phone, total_revenue FROM supplier, revenue WHERE s_suppkey = supplier_no AND total_revenue = ( SELECT max(total_revenue) FROM revenue ) ORDER BY s_suppkey; -- Creating an index keeps results always up to date and in memory. -- In this example, the index will allow for fast point lookups of -- individual supply keys. CREATE INDEX tpch_q15_idx ON tpch_q15 (s_suppkey); Stream inserts, updates, and deletes on the underlying tables (lineitem and supplier), and Materialize keeps the materialized view incrementally updated. You can type SELECT * FROM tpch_q15 and expect to see the current results immediately! Get data out Pull based: Use any PostgreSQL-compatible driver in any language/environment to make SELECT queries against your views. Tell them they're talking to a PostgreSQL database, they don't ever need to know otherwise. This is particularly helpful for pointing services and BI tools directly at Materialize. Push base
Read the full README on GitHub

What Hacker News says

42 sources
> It’d be VERY cool to make materialized views straight from the log!! This is what Materialize does. You point it at some PG (or MySQL, or... probably lots more by now) sources, and then you can define arbitrary views on top of those sources using SQL (with the full power of relational logic: fully precise joins, etc.) The views are maintained incrementally, so they update almost instantly when the underlying data updates; you don't have to manually refresh them. Disclaimer: I worked on Materialize for five years, and it is a commercial, proprietary project. But it is source-available (https://github.com/materializeinc/materialize) under a BSL-style license, and it has fairly generous terms for free usage.
In Listen to Database Changes Through the Postgres WAL
(Materialize CTO here.) > It's becoming more mainstream with Materialize, which is technically open-source, but they are quite aggressive with pushing their expensive cloud and offuscating on-prem usage. Quick but important clarification: Materialize is source available, not open source. We've been licensed under the BSL [0] from the beginning. We feel that the BSL is the best way to ensure we can build a sustainable business to fund Materialize's development, while still contributing our research advances back to the scientific community. > Quite underrated, it has so much promise. I'm glad you think so. We think so too. One of the best parts of my job is watching the "aha" moment our prospects have when they realize how much of the complex code they've been writing is neatly expressed as a SUBSCRIBE over a SQL materialized view. [0]: ht
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In The notifier pattern for applications that use Postgres
Take a look at Materialize, Noria and the family of Differential/Timely Dataflow technologies. It's the same concept on steroids, you can subscribe to arbitrary queries and efficiently receive any changes to that view. You can also efficiently maintain any materialized view for extremely fast reads for known queries. An automatic stream processing pipeline for maintaining caches and listening to complex real-time events. Quite underrated, it has so much promise. The concept is not new but it's still semi-stuck in Rust-land. It's becoming more mainstream with Materialize, which is technically open-source, but they are quite aggressive with pushing their expensive cloud and offuscating on-prem usage. https://github.com/MaterializeInc/materialize https://github.com/mit-pdos/noria https://timelydataflow.github.io/differential-dataflow/ https:
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In The notifier pattern for applications that use Postgres
> Materialize no longer provide the latest code as an open-source software that you can download and try. It turned from a single binary design to cloud-only micro-service Materialize CTO here. Just wanted to clarify that Materialize has always been source available, not OSS. Since our initial release in 2020, we've been licensed under the Business Source License (BSL), like MariaDB and CockroachDB. Under the BSL, each release does eventually transition to Apache 2.0, four years after its initial release. Our core codebase is absolutely still publicly available on GitHub [0], and our developer guide for building and running Materialize on your own machine is still public [1]. It is true that we substantially rearchitected Materialize in 2022 to be more "cloud-native". Our new cloud offering offers horizontal scalability and fault toleranc
Read the rest
e—our two most requested features in the single-binary days. I wouldn't call the new architecture a microservices design though! There are only 2-3 services, each quite substantial, in the new architecture (loosely: a compute service, an orchestration service, and, soon, a load balancing service). We do push folks to sign up for a free trial of our hosted cloud offering [2] these days, rather than trying to start off by running things locally, as we generally want folks' first impressions of Materialize to be of the version that we support for production use cases. A all-in-one single machine Docker image does still exist, if you know where to look, but it's very much use-at-your-own-risk, and we don't recommend using it for anything serious, but it's there to support e.g. academic work that wants to evaluate Materialize's capabilities to incrementally maintain recursive SQL queries. If folks have questions about Materialize, we've got a lively community Slack [3] where you can connect directly with our product and engineering teams. [0]: https://github.com/MaterializeInc/materialize/tree/main [1]: https://github.com/MaterializeInc/materialize/blob/main/doc/... [2]: https://materialize.com/playground/ [3]: https://materialize.com/s/chat
In Proton, a fast and lightweight alternative to Apache Flink
> the Query Graph Model (QGM) representation is quite abstract and hardcodes many properties, making it exceptionally difficult to understand. Its claimed extensibility is also questionable. I don't know much about the context, but it was interesting to note that Materialize scrapped their QGM code last year: https://github.com/MaterializeInc/materialize/pull/17139 Also, a couple of interesting projects in the IR space: - https://substrait.io/ is a cross-language serialization for Relational Algebra - https://www.lingo-db.com/ is an MLIR-based (LLVM) query engine described extensively in this paper https://db.in.tum.de/~jungmair/papers/p2485-jungmair.pdf?lan...
In What I talk about when I talk about query optimizer (part 1): IR design
Quine seems to be an interesting project but I'm not too familiar with it. Its main feature, evaluating complex multi-way join queries on incoming streaming data, exists in the relational world as the Materialize database which leverages differential dataflow for computation. Quine uses Cypher so expressing path queries can be done with the concise Kleene-star syntax, e.g. (p1:Person)-[:knows*]-(p2:Person). Materalize is getting support for WITH RECURSIVE and WITH MUTUALLY RECURSIVE (their own SQL extension that fixes some issues of WITH RECURSIVE): https://github.com/MaterializeInc/materialize/issues/11176
In Postgres as a graph database
Thanks! To answer your question: The core components of Materialize have always been licensed under the BSL [0], with a conversion to the Apache v2.0 License four years from the date of publication. These components (now called the storage, compute, and adapter layers) continue to be developed in the open under the same license, but are no longer packaged or supported for on-premise deployment. Timely Dataflow and Differential Dataflow [1] are the open source frameworks that have always been at the heart of the compute layer in Materialize. If you're referencing the downloadable binary when you mentioned "the open-source version", we decided the opportunity cost of splitting our attention and continuing to release updated binary versions by "rebundling" Materialize is too high. We have a small team and ambitious plans for Materialize, (ma
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ybe some `WITH RECURSIVE`?) so we don't plan to release updates to the binary. [0] https://github.com/MaterializeInc/materialize/blob/main/LICE... [1] https://timelydataflow.github.io/differential-dataflow/intro...
In The next generation of Materialize
As mentioned in the blog post, clusters allow horizontal scalability and daisy chaining, so you can allocate more memory for your views even if you run up against the limits of how much memory you can fit on a single machine. We've got plans in the works to support out-of-core execution, too. > Also they do not integrate at all with custom data types in Postgres IME. E.g. an enumeration in your table will mean materialize can’t read the table as a source. Lame. We're aware of this and are working on a fix. There are two tracking issues, if you'd like to follow along: * #6818 (https://github.com/MaterializeInc/materialize/issues/6818) is specifically about supporting PostgreSQL enum types * #15073 (https://github.com/MaterializeInc/materialize/issues/15073) is about handling PostgreSQL types that are unknown to Materialize in a more genera
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l purpose way *
In The next generation of Materialize

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