> ## Documentation Index
> Fetch the complete documentation index at: https://doc.lucidworks.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Lucidworks Fusion Product Lifecycle

<Callout icon="file-certificate" color="#5314a3">
  This policy is valid for Fusion 5.5.0 and earlier only. Starting with the release of Fusion 5.17.0, this policy is updated to the [Lucidworks Semantic Version Support Lifecycle](/docs/policies/lifecycle-policies/lw-semantic-version-support-lifecycle).
</Callout>

## Modern Policy

The [Lucidworks Modern Technical Support Policy](/docs/policies/modern-technical-support) covers Customer-hosted, cloud-native Fusion products available through subscription directly from Lucidworks or through resellers.

### Fusion Products covered by the Modern Policy

```mermaid theme={"dark"}
gantt
    dateFormat YYYY-MM-DD
    axisFormat %m/%y
    section Fusion 5.x
    5.5.0 :2022-03-18, 2023-09-18
    5.4.x :2021-04-23, 2022-10-23
    5.3.x :2020-11-18, 2022-05-18
    5.2.x :2020-08-24, 2022-02-24
    5.1.x :2020-03-12, 2021-09-12
    5.0.x :2019-09-11, 2021-03-11
```

| Product      | Release Date       | End of Service     |
| ------------ | ------------------ | ------------------ |
| Fusion 5.5.0 | March 18, 2022     | September 18, 2023 |
| Fusion 5.4.x | April 23, 2021     | October 23, 2022   |
| Fusion 5.3.x | November 18, 2020  | May 18, 2022       |
| Fusion 5.2.x | August 24, 2020    | February 24, 2022  |
| Fusion 5.1.x | March 12, 2020     | September 12, 2021 |
| Fusion 5.0.x | September 11, 2019 | March 11, 2021     |

## Enterprise Policy

The [Lucidworks Enterprise Lifecycle Policy](/docs/policies/enterprise-technical-support) covers Customer-hosted, server-based Fusion products available through subscription or a perpetual licensing model.

### App Studio Products covered by the Enterprise Policy

```mermaid theme={"dark"}
gantt
    dateFormat YYYY-MM-DD
    axisFormat %m/%y
    section App Studio 4.x
    4.13 :2021-09-16, 2024-09-16
    4.12 :2021-09-16, 2023-09-16
    4.11 :2020-07-21, 2022-07-21
    4.10 :2020-03-12, 2022-03-12
    4.9 :2020-01-30, 2022-01-30
    4.8 :2020-01-13, 2022-01-13
    4.7 :2019-11-07, 2021-11-07
    4.6 :2019-09-27, 2021-09-27
    4.5 :2019-08-16, 2021-08-16
```

| Product                    | Release Date       | End of Mainstream Support |
| -------------------------- | ------------------ | ------------------------- |
| App Studio Enterprise 4.13 | September 16, 2021 | September 16, 2024        |
| App Studio Enterprise 4.12 | September 16, 2021 | September 16, 2023        |
| App Studio Enterprise 4.11 | July 21, 2020      | July 21, 2022             |
| App Studio Enterprise 4.10 | March 12, 2020     | March 12, 2022            |
| App Studio Enterprise 4.9  | January 30, 2020   | January 30, 2022          |
| App Studio Enterprise 4.8  | January 13, 2020   | January 13, 2022          |
| App Studio Enterprise 4.7  | November 07, 2019  | November 07, 2021         |
| App Studio Enterprise 4.6  | September 27, 2019 | September 27, 2021        |
| App Studio Enterprise 4.5  | August 16, 2019    | August 16, 2021           |
| App Studio \< 4.2.6        | N/A                | September 1, 2020         |

### Fusion Products covered by the Enterprise Policy

```mermaid theme={"dark"}
gantt
    dateFormat YYYY-MM-DD
    axisFormat %m/%y
    section Fusion 4.2.x
    4.2.6 :2020-04-01, 2022-04-01
    4.2.5 :2019-10-22, 2021-10-22
    4.2.4 :2019-09-03, 2021-09-03
    4.2.3 :2019-06-28, 2021-06-28
    4.2.1 :2019-04-08, 2021-04-08
    4.2.0 :2019-03-01, 2021-03-01
    section Fusion 4.x
    4.1.x :2018-07-17, 2020-07-17
    4.0.x :2018-02-22, 2020-02-22
```

| Product                                                    | Release Date      | End of Mainstream Support         |
| ---------------------------------------------------------- | ----------------- | --------------------------------- |
| Fusion 4.2.6-SP3 (requires Extended Support entitlement)\* | June 27, 2022     | Release date of next service pack |
| Fusion 4.2.6                                               | April 1, 2020     | April 1, 2022                     |
| Fusion 4.2.5                                               | October 22, 2019  | October 22, 2021                  |
| Fusion 4.2.4                                               | September 3, 2019 | September 3, 2021                 |
| Fusion 4.2.3                                               | June 28, 2019     | June 28, 2021                     |
| Fusion 4.2.2                                               | May 20, 2019      | N/A (release pulled)              |
| Fusion 4.2.1                                               | April 8, 2019     | April 8, 2021                     |
| Fusion 4.2.0                                               | March 1, 2019     | March 1, 2021                     |
| Fusion 4.1.x                                               | July 17, 2018     | July 17, 2020                     |
| Fusion 4.0.x                                               | February 22, 2018 | February 22, 2020                 |

\*Extended Support program duration and terms are defined by the Extended Support contract. Please reference the Extended Support section of your contract or contact your account representative for details.