# PART 2: Existing subsystems to reuse instead of building be… (1)

Checks 1 to 4 of 5, each with its evidence

## What you can do here

- **Verify 1: Temporal | Durable execution: long-running…**: Verify: Temporal | Durable execution: long-running workflows that survive cra…
- **Verify 2: Cadence | Temporal's predecessor (originate…**: Verify: Cadence | Temporal's predecessor (originated at Uber) | Apache-2.0 |…
- **Verify 3: DBOS Transact (Python) | Durable workflows…**: Verify: DBOS Transact (Python) | Durable workflows on Postgres as a library |…
- **Verify 4: Restate | Durable execution server | BUSL-1…**: Verify: Restate | Durable execution server | BUSL-1.1. Additional use grant f…
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- **Open Meet the research: 2.8 Workflow and dura**