---
title: "Open House 2026 Day 2: 10 years of open source and what the ecosystem is building next"
description: "Open House 2026 Day 2 recaps ClickHouse’s tenth year as an open-source project and the ecosystem forming around its data platform. The event reported more than 2,600 contributors, nearly 48,000 GitHub stars, over 200 integrations, and the launch of the House Mates partner program. Announcements included Fivetran’s generally available ClickHouse Cloud destination, a Google Cloud Dataflow Pub/Sub template, Sigma’s public-beta connector and ETL Cache Layer, and a ClickHouse dbt Fusion adapter available in alpha through the CLI. The recap also describes MCP and agent-oriented observability work, including a ClickStack MCP server that translates investigations into optimized ClickHouse queries. Internal testing reported up to 25% fewer tool calls, 2.5 times greater consistency, and nearly 20% better evaluation results."
---

# Open House 2026 Day 2: 10 years of open source and what the ecosystem is building next

[Clickhouse](https://yomu.fyi/company/clickhouse) · May 28, 2026

**Type:** Announcement

## Summary

Open House 2026 Day 2 recaps ClickHouse’s tenth year as an open-source project and the ecosystem forming around its data platform. The event reported more than 2,600 contributors, nearly 48,000 GitHub stars, over 200 integrations, and the launch of the House Mates partner program. Announcements included Fivetran’s generally available ClickHouse Cloud destination, a Google Cloud Dataflow Pub/Sub template, Sigma’s public-beta connector and ETL Cache Layer, and a ClickHouse dbt Fusion adapter available in alpha through the CLI. The recap also describes MCP and agent-oriented observability work, including a ClickStack MCP server that translates investigations into optimized ClickHouse queries. Internal testing reported up to 25% fewer tool calls, 2.5 times greater consistency, and nearly 20% better evaluation results.

## Context

ClickHouse’s tenth anniversary as an open-source project coincides with rapid ecosystem growth, including more than 200 integrations and increasing adoption of MCP support and its skills framework. Day 2 focused on what the open-source community, partners, and customers are building on top of ClickHouse.

## Approach / What changed

ClickHouse expanded ecosystem support through the House Mates partner program and announced integrations spanning data replication, streaming ingestion, BI, transformation, agents, and observability. Specific changes include automated Fivetran schema management, a managed Pub/Sub pipeline through Google Cloud Dataflow, a dbt Fusion adapter, and a ClickStack MCP server exposing semantic observability operations backed by optimized ClickHouse queries.

## Takeaways

- The inaugural House Mates cohort launched with more than 25 ISV and technology partners and more than 35 services and channel partners.
- Fivetran’s ClickHouse Cloud destination is generally available, supporting replication from more than 500 sources with schema migration support and an enterprise SLA.
- Internal testing of the ClickStack MCP server reported up to 25% fewer tool calls, a 2.5x increase in consistency, and almost 20% improvement in evaluation.

**Tags:** [Data Pipelines](https://yomu.fyi/topic/data-pipelines), [LLMs](https://yomu.fyi/topic/llm), [Observability](https://yomu.fyi/topic/observability), [Open Source](https://yomu.fyi/topic/open-source), [Performance](https://yomu.fyi/topic/performance)

- Source: [Clickhouse](https://clickhouse.com/blog/open-house-2026-day-2)
- Source URL: https://clickhouse.com/blog/open-house-2026-day-2
- Ingested by Yomu: 2026-08-29T00:00:52.099Z

[Read original post](https://clickhouse.com/blog/open-house-2026-day-2)