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  "title": "Jitsu",
  "description": "Jitsu is an open-source alternative to Segment: it collects event data from sites, apps, and servers and routes it in real time to data warehouses and third-party tools (PostHog, GA4, Meta, Ads). Open source: yes (MIT); self-hostable, with no feature gating; hosted option at jitsu.com. Free (open-core); ~5.1k stars; maker jitsucom.",
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  "date_published": "2026-09-29T00:00:00Z",
  "date_modified": "2026-09-29T00:00:00Z",
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  "one_liner": "Jitsu collects event data from sites, apps and servers and routes it in real time to warehouses and tools like PostHog, GA4 and Meta — an open-source Segment.",
  "open_source": "yes",
  "self_hostable": "yes",
  "pricing_model": "free",
  "who_its_for": "A data or growth team that wants Segment-style event collection and routing — from websites, apps, and servers into warehouses (ClickHouse, BigQuery, Snowflake, Redshift, Postgres) and tools like PostHog, GA4, and Meta — self-hosted with no feature gating, or on the jitsu.com hosted tier.",
  "who_its_not_for": "A team that wants a fully managed CDP with zero infrastructure and is unwilling to either self-host or adopt the hosted service, or one that needs only a single-vendor analytics SDK rather than a routing layer.",
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    "note": "MIT per repo; ~5.1k stars. Tagline: 'Open-source event data platform. An alternative to Segment.' Collects events from sites/apps/servers and routes them in real time to warehouses (ClickHouse, BigQuery, Snowflake, Redshift, Postgres, S3, GCS) and SaaS destinations (PostHog, GA4, Meta). Fully self-hostable with no feature gating; Jitsu Cloud offers a managed tier with a free plan (jitsucom/jitsu, verified 2026-09-29)."
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  "caveats": "Verified from the primary repo (2026-09-29); no independent testing here. Open-core: the OSS is MIT and self-hostable with no feature gating, while jitsu.com is a separate managed service. The destination catalog and real-time delivery are the vendor's own description (vendor-claim) — confirm the specific destinations and latency you need against current docs, since connector coverage evolves.",
  "lead": "Jitsu is an open-source alternative to Segment: it collects event data from websites, apps, and servers and routes it in real time to data warehouses and third-party tools such as PostHog, GA4, Meta, and ad platforms. Open source: yes (MIT); fully self-hostable with no feature gating, and there is a…",
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      "est_tokens": 101,
      "text": "Jitsu is an open-source alternative to Segment: it collects event data from websites, apps, and servers and routes it in real time to data warehouses and third-party tools such as PostHog, GA4, Meta, and ad platforms. Open source: yes (MIT); fully self-hostable with no feature gating, and there is a managed option at jitsu.com. It is free (open-core), has ~5.1k stars, and is maintained by jitsucom."
    },
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      "heading_path": [
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      "text": "and routes it in real time to data warehouses and third-party tools such as PostHog, GA4, Meta, and ad platforms. Open source: yes (MIT); fully self-hostable with no feature gating, and there is a managed option at jitsu.com. It is free (open-core), has ~5.1k stars, and is maintained by jitsucom.\n\nJitsu is an event-data pipeline. It ingests events via SDKs, an HTTP API, and Segment-proxy compatibility, then fans them out to destinations: warehouses including ClickHouse, BigQuery, Snowflake, Redshift, Postgres, S3, and GCS, and SaaS tools including PostHog, GA4, and Meta. Delivery is real-time, with per-destination batches as frequent as every minute, and you can apply JavaScript transformation functions in flight. It also carries a built-in identity graph for profile building, live event debugging, and connector syncs for pulling third-party data. The self-hosted edition has no feature gating; Jitsu Cloud is the managed tier and includes a free plan. Open source: yes (MIT); self-hostable; free (open-core)."
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      "text": "JavaScript transformation functions in flight. It also carries a built-in identity graph for profile building, live event debugging, and connector syncs for pulling third-party data. The self-hosted edition has no feature gating; Jitsu Cloud is the managed tier and includes a free plan. Open source: yes (MIT); self-hostable; free (open-core).\n\n- MIT per repo; ~5.1k stars. Tagline: \"Open-source event data platform. An alternative to Segment.\"\n- Collects events from sites/apps/servers; routes in real time to warehouses (ClickHouse, BigQuery, Snowflake, Redshift, Postgres, S3, GCS) and SaaS destinations (PostHog, GA4, Meta).\n- Fully self-hostable with no feature gating; Jitsu Cloud managed tier has a free plan (jitsucom/jitsu, verified 2026-09-29).\n- Surfaced via an X viral pull (@DanKornas); license/facts verified against the primary repo 2026-09-29."
    },
    {
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      "heading_path": [
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      "est_tokens": 311,
      "text": "real time to warehouses (ClickHouse, BigQuery, Snowflake, Redshift, Postgres, S3, GCS) and SaaS destinations (PostHog, GA4, Meta). - Fully self-hostable with no feature gating; Jitsu Cloud managed tier has a free plan (jitsucom/jitsu, verified 2026-09-29). - Surfaced via an X viral pull (@DanKornas); license/facts verified against the primary repo 2026-09-29.\n\nEvent data is the substrate a GTM stack runs on — product usage, site behavior, signup and conversion events — and Segment is the default way to collect and route it, at a price that scales painfully with volume. Jitsu is the open-source, self-hostable version of that job: capture events once and route them to your warehouse and to the tools your team already uses (PostHog, GA4, Meta), without per-event vendor billing and without data leaving infrastructure you control. The honest read: this is open-core, so the free path is either self-hosting (real infrastructure — a ClickHouse-backed pipeline is not zero-ops) or the jitsu.com managed tier; and the destination catalog and real-time claims are the vendor's, so verify that the specific warehouses and SaaS destinations you depend on are supported at the latency you need before you route production traffic through it."
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