Oren Eini

CEO and Founder of RavenDB

Oren Eini is the creator of RavenDB and a veteran software architect with over two decades of experience in .NET development, NoSQL databases, and distributed systems. As the CEO and founder of RavenDB, he is a recognized authority in performance optimization, database scalability, and real-time application architecture. His deep technical insights make complex topics in database engineering accessible to developers worldwide.

RavenDB Kubernetes Operator

15 December 2025

I’m happy to announce the official release of the RavenDB Kubernetes Operator. As organizations use Kubernetes for more and more parts of their infrastructure, the complexity of deploying databases in such an environment is quite a challenge. For RavenDB, you need to handle certificates, persistence, and upgrades, and it is easy for that to become...

Choosing “naked” vms or Kubernetes for hosting databases in the cloud

11 December 2025

We are a database company, and many of our customers and users are running in the cloud. Fairly often, we field questions about the recommended deployment pattern for RavenDB.Given the… rich landscape of DevOps options, RavenDB supports all sorts of deployment models:Embedded in your applicationPhysical hardware (from a Raspberry Pi to massive servers)Virtual machines in...

Implementing Agentic Reminders in RavenDB

8 December 2025

A really interesting problem for developers building agentic systems is moving away from chatting with the AI model. For example, consider the following conversation:This is a pretty simple scenario where we need to actually step out of the chat and do something else. This seems like an obvious request, right? But it turns out to...

Recording: Build AI that understands your business

5 December 2025

I gave the following talk at Microsoft Ignite 2025:Connecting LLMs to your secure, operational database involves complexity, security risks, and hallucinations. This session shows how to build context-aware AI agents directly on your existing data, going from live database to production-ready, secure AI agent in hours. You'll see how to ship personalized experiences that will...

Recording: From CRUD TO AI – building an intelligent Telegram bot in < 200 lines of code with RavenDB

2 December 2025

Want to see how modern applications handle complexity, scale, and cutting-edge features without becoming unmanageable? In this deep-dive webinar, we move From CRUD to AI Agents, showcasing how RavenDB, a high-performance document database, simplifies the development of a complex Property Management application.

Using multi-staged actions with AI Agents to reduce costs & time

17 November 2025

When building AI Agents, one of the challenges you have to deal with is the sheer amount of data that the agent may need to go through. A natural way to deal with that is not to hand the information directly to the model, but rather allow it to query for the information as it sees...

Reducing AI context load using actions

14 November 2025

When using an AI model, one of the things that you need to pay attention to is the number of tokens you send to the model. They literally cost you money, so you have to balance the amount of data you send to the model against how much of it is relevant to what you want it...

Using AI Agents parameters outside of the model’s scope

12 November 2025

Building an AI Agent in RavenDB is very much like defining a class, you define all the things that it can do, the initial prompt to the AI model, and you specify which parameters the agent requires. Like a class, you can create an instance of an AI agent by starting a new conversation with...

Join RavenDB at Microsoft Ignite Next Week

10 November 2025

The RavenDB team will be at Microsoft Ignite in San Francisco next week, as will be yours truly in person 🙂. We are going to show off RavenDB and its features both new and old. I'll be hosting a session demonstrating how to build powerful AI Agents using RavenDB.I’ll show practical examples and the features that...

RavenDB’s new offices

23 October 2025

RavenDB Ltd (formerly Hibernating Rhinos) has been around for quite some time!In its current form, we've been building the RavenDB database for over 15 years now.In late 2010, we officially moved into our first real offices. Our first place was a small second-story office space deep in the industrial section, a bit out of the...

Using AI for candidate ranking with RavenDB

10 October 2025

Hiring the right people is notoriously difficult.I have been personally involved in hiring decisions for about two decades, and it is an unpleasant process. You deal with an utterly overwhelming influx of applications, often from candidates using the “spray and pray” approach of applying to all jobs.At one point, I got the resume of a divorce lawyer in response...

When perf optimization breaks tests in a GOOD way

7 October 2025

You might have noticed a theme going on in RavenDB. We care a lot about performance. The problem with optimizing performance is that sometimes you have a great idea, you implement it, the performance gains are there to be had - and then a test fails… and you realize that your great idea now needs to be...

Recording: How To Run AI Agents Natively In Your Database

29 September 2025

AI agents are only as powerful as their connection to data. In this session, Oren Eini, CEO and Co-Founder of RavenDB, demonstrates why the best place for AI agents to live is inside your database. Moderated by Ariel, Director of Product Marketing at RavenDB, the webinar explores how to eliminate orchestration complexity, keep agents safe,...

Cryptographic documents in RavenDB

26 September 2025

We got an interesting use case from a customer - they need to verify that documents in RavenDB have not been modified by any external party, including users with administrator credentials for the database.This is known as the Rogue Root problem, where you have to protect yourself from potentially malicious root users. That is not an easy...

Recording: How To Create Powerful and Secure AI Agents with RavenDB

22 September 2025

Unlock practical AI agents inside your database. In this live demo and deep dive, Oren Eini shows how to build real, production-ready AI agents directly in RavenDB that query your data, take actions, remember context, and stay inside strict security guardrails. You will see an agent defined in a few lines of code, connected to...

Scheduling with RavenDB

18 September 2025

I got a question from one of our users about how they can use RavenDB to manage scheduled tasks. Stuff like: “Send this email next Thursday” or “Cancel this reservation if the user didn’t pay within 30 minutes.”As you can tell from the context, this is both more straightforward and more complex than the “run...

Webinar: Building AI Agents in RavenDB

16 September 2025

Tomorrow I’ll be giving a webinar on Building AI Agents in RavenDB. I’m going to show off some really cool ways to apply AI agents on your data, as well as our approach to AI and LLM in general.I’m looking forward to seeing you there. Caution: This is going to blow your mind.

Using AI Agents for Reranking in RavenDB

15 September 2025

Since version 7.0, RavenDB has native support for vector search. One of my favorite queries ever since has been this one:$query = 'Italian food' from "Products" where vector.search(embedding.text(Name), $query) limit 5If you run that on the sample database for RavenDB (Northwind), you’ll get the following results:Mozzarella di GiovanniRavioli AngeloChef Anton's Gumbo MixMascarpone FabioliChef Anton's Cajun...

Building an AI Agent using RavenDB

12 September 2025

AI agents allow you to inject intelligence into your application, transforming even the most basic application into something that is a joy to use.This is currently at the forefront of modern application design—the pinnacle of what your users expect and what your management drives you to deliver. TLDR; RavenDB now has an AI Agents Creator...

A deep dive into RavenDB’s AI Agents

9 September 2025

RavenDB is building a lot of AI integration features. From vector search to automatic embedding generation to Generative AI inside the database. Continuing this trend, the newest feature we have allows you to easily build an AI Agent using RavenDB.Here is how you can build an agent in a few lines of code using the...

AI Agents Security: The on-behalf-of concept

5 September 2025

AI Agents are all the rage now. The mandate has come: “You must have AI integrated into your systems ASAP.” What AI doesn’t matter that much, as long as you have it, right?Today I want to talk about a pretty important aspect of applying AI and AI Agents in your systems, the security problem that is...

Community Discussion: AI Agents & RavenDB – Sep 8

3 September 2025

Agents are here. But are we really in control? The next RavenDB Community Discussion is tackling the hottest (and riskiest) trend in AI: Agentic Systems. On September 8 at 18:00 CEST, join RavenDB CEO & Founder Oren Eini on Discord as he dives into: Why "building an agent" is not the first step in building...

The role of junior developers in the world of LLMs

20 August 2025

I ran into this tweet from Pieter Levels: … I don't care what all the developer X accounts here say "noooo AI won't do anything to the SWE job market" It's 100% coping, because it already did! It wiped out the low to mid-tier of the SWE job market You don't hire the low to mid-tier...

Replacing developers with GPUs

13 August 2025

We have been working with AI models for development a lot lately (yes, just like everyone else). And I’m seesawing between “damn, that’s impressive” and “damn, brainless fool” quite often.I want to share a few scenarios in which we employed AI to write code, how it turned out, and what I think about the future...

Goodbye Hibernating Rhinos, Hello RavenDB LTD

11 August 2025

Hibernating Rhinos is a joke name (see more on the exact reasons for the name below). The primary product I have been working on for the past 15 years has been RavenDB. That led to some confusion for people, but I liked the name (and I like rhinos), so we kept the name for a...

Google is still there when the model lets you down

5 August 2025

I wanted to add a data point about how AI usage is changing the way we write software. This story is from last week. We recently had a problem getting two computers to communicate with each other. RavenDB uses X.509 certificates for authentication, and the scenario in question required us to handle trusting an unknown...

Semantic image search in RavenDB

28 July 2025

I talked with my daughter recently about an old babysitter, and then I pulled out my phone and searched for a picture using “Hadera, beach”. I could then show my daughter a picture of her and the babysitter at the beach from about a decade ago.I have been working in the realm of databases and...

Using Vector Search for Posts Recommendations

24 July 2025

This blog recently got a nice new feature, a recommended reading section (you can find the one for this blog post at the bottom of the text). From a visual perspective, it isn’t much. Here is what it looks like for the RavenDB 7.1 release announcement:At least, that is what it shows right now. The...

RavenDB & Ansible

21 July 2025

Ansible is a way to configure, manage, and deploy software at scale. And we have recently added Ansible support for RavenDB, so you can use that to manage your RavenDB cluster.You can read the full details or see the announcement.

Production postmorterm: The rookie server’s untimely promotion

11 June 2025

Today's incident involved a production system failure when one node in the cluster unexpectedly died. That is a scenario RavenDB is designed to handle, and there are well-established (and well-trodden) procedures for recovery.In this case, the failing node didn’t just crash (which a restart would solve), but actually died. This meant that the admin had to...

RavenDB GenAI Deep Dive

6 June 2025

RavenDB 7.1 introduces Gen AI Integration, enabling seamless integration of various AI models directly within your database. No, you aren’t going to re-provision all your database servers to run on GPU instances; we empower you to leverage any model—be it OpenAI, Mistral, Grok, or any open-source solution on your own hardware. Our goal is to replicate the...

Webinar: Think inside the database

5 June 2025

On Jun 11, 2025 I’m going to do a Big Reveal of RavenDB’s new Gen AI capabilities in a public webinar. RavenDB's new feature for automated decision-making, content classification, and data enrichment. We'll cover the behind-the-scenes mechanics and how RavenDB simplifies AI logistics, letting you focus on building your system. Discover how to build AI features without...

RavenDB 7.1 with Gen AI Integration – Release Candidate

4 June 2025

We have just released the RavenDB 7.1 Release Candidate, and you can download it from the website:The big news in this release is the new Gen AI integration. You are now able to define Generative AI tasks on your own data. I have a Deep Dive post that talks about it in detail, but the gist of...

Recording: RavenDB’s Upcoming Optimizations Deep Dive

29 May 2025

Yesterday I gave a live talk about some of the re-design we did to the internals of RavenDB’s storage engine (Voron). I think it went pretty well, and the record is here.Would love to hear your feedback!

Webinar: RavenDB’s Upcoming Optimizations Deep Dive

27 May 2025

Tomorrow I’m going to be doing a Discord webinar about the deep optimizations we did in how RavenDB talks to the disk. We are talking about some of the biggest changes to the internals in a decade or so, with the accompanying performance numbers to justify that. I had a great time preparing for that, and...

Comparing DiskANN in SQL Server & HNSW in RavenDB

26 May 2025

When building RavenDB 7.0, a major feature was Vector Search and AI integration.We weren't the first database to make Vector Search a core feature, and that was pretty much by design. Not being the first out of the gate meant that we had time to observe the industry, study new research, and consider how we...

Scaling HNSW in RavenDB: Optimizing for inadequate hardware

14 May 2025

RavenDB 7.0 introduces vector search using the Hierarchical Navigable Small World (HNSW) algorithm, a graph-based approach for Approximate Nearest Neighbor search. HNSW enables efficient querying of large vector datasets but requires random access to the entire graph, making it memory-intensive.HNSW's random read and insert operations demand in-memory processing. For example, inserting 100 new items into...

Optimizing the cost of clearing a set

12 May 2025

Let’s say I want to count the number of reachable nodes for each node in the graph. I can do that using the following code:void DFS(Node start, HashSet<Node> visited) { if (start == null || visited.Contains(start)) return; visited.Add(start); foreach (var neighbor in start.Neighbors) { DFS(neighbor, visited); } } void MarkReachableCount(Graph g) { foreach(var node in...

NOT Sharding RavenDB Vector Search

9 May 2025

I ran into an interesting post, "Sharding Pgvector," in which PgDog (provider of scaling solutions for Postgres) discusses scaling pgvector indexes (HNSW and IVFFlat) across multiple machines to manage large-scale embeddings efficiently. This approach speeds up searches and improves recall by distributing vector data, addressing the limitations of fitting large indexes into memory on a single...

Making the costs visible, then fixing them

8 May 2025

We recently tackled performance improvements for vector search in RavenDB. The core challenge was identifying performance bottlenecks. Details of specific changes are covered in a separate post. The post is already written, but will be published next week, here is the direct link to that.In this post, I don’t want to talk about the actual...

Event: Exploring the Power of AI Search in Modern Applications (TODAY)

7 May 2025

Join Our Community Discussion: Exploring the Power of AI Search in Modern ApplicationsWe're excited to announce our second Community Open Discussion, focusing on a transformative feature in today's applications: AI search.This technology is rapidly becoming the new standard for delivering intelligent and intuitive search experiences.Join Dejan from our DevRel team for an open and engaging...

RavenDB Storage Provider for Orleans

5 May 2025

Orleans is a distributed computing framework for .NET. It allows you to build distributed systems with ease, taking upon itself all the state management, persistence, distribution, and concurrency.The core aspect in Orleans is the notion of a “grain” - a lightweight unit of computation & state. You can read more about it in Microsoft’s documentation,...

RavenDB News: May 2025

2 May 2025

RavenDB is moving at quite a pace, and there is actually more stuff happening than I can find the time to talk about. I usually talk about the big-ticket items, but today I wanted to discuss some of what we like to call Quality of Life features. The sort of things that help smooth the...

Recording: Practical AI Integration with RavenDB

30 April 2025

Last week I did an hour long webinar showing AI integration in RavenDB. From vector search to RAG, from embedding generation to Gen AI inside of the database engine.Most of those features are already released, but I would really love your feedback on the Gen AI integration story (starts at around to 30 minutes mark...

AI Impact – normalizing Good Enough

25 April 2025

I was just reviewing a video we're about to publish, and I noticed something in the subtitles. It said, "Six qubits are used for..."I got all excited thinking RavenDB was jumping into quantum computing. But nope, it turned out to be a transcription error. What was actually said was, "Six kilobytes are used for..."To be fair, I listened...

Who can cancel Carmen Sandiego?

14 April 2025

RavenDB is a pretty big system, with well over 1 million lines of code. Recently, I had to deal with an interesting problem. I had a CancellationToken at hand, which I expected to remain valid for the duration of the full operation.However, something sneaky was going on there. Something was cancelling my CancelationToken, and not in an...

Pricing transparency in RavenDB Cloud

11 April 2025

Cloud service costs can often be confusing and unpredictable.RavenDB Cloud's new feature addresses this by providing real-time cost predictions whenever you make changes to your system. This transparency allows you to make informed choices about your cluster and easily incorporate cost considerations into your decision loop to take control of your cloud budget.. The implementation of...

When racing the Heisenbug, code quality goes out the Windows

9 April 2025

There are at least 3 puns in the title of this blog post. I’m sorry, but I’m writing this after several days of tracking an impossible bug. I’m actually writing a set of posts to wind down from this hunt, so you’ll have to suffer through my more prosaic prose. This bug is the kind that leaves...

Production postmortem: The race condition in the interlock

7 April 2025

This post isn’t actually about a production issue—thankfully, we caught this one during testing. It’s part of a series of blog posts that are probably some of my favorite posts to write. Why? Because when I’m writing one, it means I’ve managed to pin down and solve a nasty problem. This time, it’s a race condition...

RavenDB on AWS Marketplace

4 April 2025

We just announced the general availability of RavenDB on AWS Marketplace. By joining AWS Marketplace, we provide users with a seamless purchasing experience, flexible deployment options, and direct integration with their AWS billing. You can go directly to RavenDB on AWS Marketplace here.That means:One-click cluster deploymentEasy scaling for growing workloadsHigh-availability and security on AWS Most importantly,...

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