HackerReposA FIELD GUIDE TO OPEN SOURCE
ProSponsor the shelf♧ 0
← Back to top all-time
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 8–Nov 15 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/15/2026, 7:02:26 AM 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

8 sources
I always love your take even if I don't agree, SpaceCurve was a phenomenal system, one of the most pragmatic, high performance, easy to use MPP database systems I have ever used. We never met btw, was just a user. But I think you are wrong about Rust not having the right machinery for making high performance dbs. Two examples are Noria and Materialize https://github.com/mit-pdos/noria and it its 50k lines, in the immediate codebase, there are 40 uses of unsafe. In Materialize's 125k of Rust, there are 76 direct uses of unsafe. https://github.com/MaterializeInc/materialize
In Scylla – Real-Time Big Data Database
Materialize | Engineering, Product, Marketing | NYC HQ + North America Remote + Europe Remote | https://materialize.com/careers Materialize is a streaming database for real-time applications. Materialize lets you ask questions about your data, and then get low-latency, correct answers, which are kept incrementally updated as the underlying data changes. Materialize is built on Timely Dataflow, a low-latency cyclic dataflow computational model, first introduced in the paper "Naiad: a timely dataflow system". Materialize is co-founded by Frank McSherry, the primary author of Timely Dataflow (http://timelydataflow.com) and Differential Dataflow (http://differentialdataflow.com), the two open source projects that power Materialize. Materialize itself is source-available and entirely written in Rust: https://github.com/MaterializeInc/materiali
Read the rest
ze Materialize is a team of over thirty, primarily based in New York City but also open to remote positions in the EU and NA. We are hiring in all engineering positions (eng. manager, engineers from new grad to principal) as well as several non-engineering positions - for the full list, see https://materialize.com/careers We are a team of significantly experienced individuals in databases and distributed systems, and looking to add more folks with that interest and/or experience to our team. Materialize recently raised a $32m Series B led by Kleiner Perkins, which was lovingly hacker newsed: https://news.ycombinator.com/item?id=25277511
In Ask HN: Who is hiring? (May 2021)
Materialize | Engineering, Product, Marketing | NYC HQ + North America Remote + Europe Remote | https://materialize.com/careers Materialize is a streaming database for real-time applications. Materialize lets you ask questions about your data, and then get low-latency, correct answers, which are kept incrementally updated as the underlying data changes. Materialize is built on Timely Dataflow, a low-latency cyclic dataflow computational model, first introduced in the paper "Naiad: a timely dataflow system". Materialize is co-founded by Frank McSherry, the primary author of Timely Dataflow (http://timelydataflow.com) and Differential Dataflow (http://differentialdataflow.com), the two open source projects that power Materialize. Materialize itself is source-available and entirely written in Rust: https://github.com/MaterializeInc/materiali
Read the rest
ze Materialize is a team of over thirty, primarily based in New York City but also open to remote positions in the EU and NA. We are hiring in all engineering positions (eng. manager, engineers from new grad to principal) as well as several non-engineering positions - for the full list, see https://materialize.com/careers We are a team of significantly experienced individuals in databases and distributed systems, and looking to add more folks with that interest and/or experience to our team. Materialize recently raised a $32m Series B led by Kleiner Perkins, which was lovingly hacker newsed: https://news.ycombinator.com/item?id=25277511
In Ask HN: Who is hiring? (April 2021)
> I don't think I understand what is meant by "type confusion". Accessing a memory location with one type as if it's another. In C or C++ it's usually because you accessed a union without checking a tag somewhere else. One classic way this happens is in an interpreter where you have a big enum for all the different possible data types: https://github.com/MaterializeInc/materialize/blob/1b9b3cfab... And then in various builtin functions you expect particular types: https://github.com/MaterializeInc/materialize/blob/main/src/... In rust and zig this code will produce a runtime error if you screw up, but in c it's easy to forget to check the tag and then you get UB. Similarly unwrap is checked in rust and zig but the equivalent in c - dereferencing a pointer that you are pretty sure is not null - is not. Of course rust and zig both have supp
Read the rest
ort for c-style unions too, but they're not the first thing people reach for.
In How Safe Is Zig?
Thank you very much for the elaboration, I really appreciate the thinking! > Personally, I'm less interested in one-off migrations like you're suggesting. What I really want is to have something like Materialize embedded in my Postgres. We're about to launch "Materialize as a Postgres read-replica" where it connects to a Postgres leader just as a Postgres read-replica would - using the built-in streaming replication in newer versions of postgres. It's currently in final testing before being released in the next month or two. https://github.com/MaterializeInc/materialize/issues/5370 Also on our roadmap for Materialize Cloud is plug-and-play connections with Fivetran, Hightouch, and Census (and more) to bring in the business data, and allow you to, as you put it, make Materialize the central collection point for keeping updated all your vie
Read the rest
ws.
In Introducing dbt + Materialize
So, roughly speaking, I think you're describing a view that could be defined in Materialize like so: CREATE MATERIALIZED VIEW customer_avg_latency SELECT customer_id, metric_id, avg(metric_val) FROM metrics JOIN resources ON metrics.resource_id = resources.id JOIN customers ON resources.customer_id = customer.id GROUP BY customer_id, metric_id There are various ways to slice and dice that query as a user that'll allow you to choose whether to do the aggregate early or late. The details, I think, depend on the specifics of your data model. > When a resource migrates between customers, the whole history of the customer changes. I'm a bit confused about this part. In the query I posted above, Differential's incremental join algorithm would spare you from recomputing the entire join. (As written the query would have t
Read the rest
o re-aggregate the metrics associated with that resource that moved, but that could be solved by manually pushing the avg down.) If you'd like to drop by our Community Slack (https://materialize.com/s/chat) or GitHub issues (https://github.com/MaterializeInc/materialize/issues) we'd be happy to talk through things in more detail!
In Introducing dbt + Materialize
Materialize | Engineering, Product, Marketing | NYC HQ + North America Remote + Europe Remote | https://materialize.com/careers Materialize is a streaming database for real-time applications. Materialize lets you ask questions about your data, and then get low-latency, correct answers, which are kept incrementally updated as the underlying data changes. Materialize is built on Timely Dataflow, a low-latency cyclic dataflow computational model, first introduced in the paper "Naiad: a timely dataflow system". Materialize is co-founded by Frank McSherry, the primary author of Timely Dataflow (http://timelydataflow.com) and Differential Dataflow (http://differentialdataflow.com), the two open source projects that power Materialize. Materialize itself is source-available and entirely written in Rust: https://github.com/MaterializeInc/materiali
Read the rest
ze Materialize is a team of around thirty, primarily based in New York City but also open to remote positions in the EU and NA. We are hiring in all engineering positions (eng. manager, engineers from new grad to principal) as well as several non-engineering positions - for the full list, see https://materialize.com/careers We are a team of significantly experienced individuals in databases and distributed systems, and looking to add more folks with that interest and/or experience to our team. Materialize recently raised a $32m Series B led by Kleiner Perkins, which was lovingly hacker newsed: https://news.ycombinator.com/item?id=25277511
In Ask HN: Who is hiring? (March 2021)
Materialize | Engineering, Product, Marketing | NYC HQ + North America Remote + EU Remote | http://materialize.io/careers Materialize is a streaming database for real-time applications. Materialize lets you ask questions about your data, and then get low-latency, correct answers, which are kept incrementally updated as the underlying data changes. Materialize is built on Timely Dataflow, a low-latency cyclic dataflow computational model, first introduced in the paper "Naiad: a timely dataflow system". Materialize is co-founded by Frank McSherry, the primary author of Timely Dataflow (http://timelydataflow.com) and Differential Dataflow (http://differentialdataflow.com), the two open source projects that power Materialize. Materialize itself is source-available and entirely written in Rust: https://github.com/MaterializeInc/materialize Mat
Read the rest
erialize is a team of around thirty, primarily based in New York City but also open to remote positions in the EU and NA. We are hiring in all engineering positions (eng. manager, engineers from new grad to principal) as well as several non-engineering positions - for the full list, see http://materialize.io/careers We are a team of significantly experienced individuals in databases and distributed systems, and looking to add more folks with that interest and/or experience to our team. Materialize recently raised a $32m Series B led by Kleiner Perkins, which was lovingly hacker newsed: https://news.ycombinator.com/item?id=25277511
In Ask HN: Who is hiring? (February 2021)

MAKE YOURSELF AT HOME

A few shortcuts

/
Search the collection
?
Open this guide
Esc
Close dialogs and navigation

Your saved repositories and interests stay in this browser.