Linking AssemblyAI as a source

Alpha release

This source is currently in alpha. The interface and available tables may change.

The AssemblyAI connector syncs your speech-to-text transcripts into the PostHog Data warehouse, so you can analyze your transcription data alongside your product data. AssemblyAI retains only the last 90 days of transcripts, so only those are available to sync.

Prerequisites

You need an AssemblyAI account with API access so you can create an API key.

Adding a data source

In PostHog, go to the Sources tab of the data pipeline section.
Click + New source and click Link next to this source.
Enter your credentials (see Configuration below) and click Next.
Select the tables you want to sync, choose a sync method and frequency, then click Import.

Once the syncs are complete, you can start querying this data in PostHog.

When linking AssemblyAI, you'll need:

API key – find your key in the AssemblyAI dashboard.
Region – choose the region that matches your account, either US (api.assemblyai.com) or EU (api.eu.assemblyai.com).

Sync modes

Each table can be synced in one of several modes, depending on what the source supports:

Webhook (when available) – the source pushes changes to PostHog in real time. Fastest freshness, lowest ongoing cost, and the only mode that reliably captures updates and deletes.
Incremental – only new or updated rows are synced on each run, using a cursor field (such as an updated_at timestamp). Cheaper than a full refresh, but deletes aren't captured.
Append only – new rows are appended using a cursor field; existing rows are never updated. Ideal for immutable, append-only tables like event logs.
Full refresh – the whole table is reloaded on every sync. Use it when a table has no reliable cursor or when you need deletions reflected.

See sync methods for a full explanation of how each mode works and how to choose between them.

This source is full refresh only.

Configuration

Option	Type	Required
`API key`	password	Yes
`Region`	select	Yes

Supported tables

Table	Description	Sync method	Incremental field	Primary key
`transcripts`	Lists transcripts and hydrates each with its full text, words, and audio-intelligence results. AssemblyAI retains only the last 90 days. Full refresh only.	Full refresh	created	—

Troubleshooting

If you see an authentication error, your AssemblyAI API key may be invalid or revoked. Create a new key in the AssemblyAI dashboard, then reconnect.

If your sync is failing or data looks wrong, see the Data warehouse troubleshooting guide. If that doesn't help, contact support – we're happy to help.