Yes, your historical data can be backfilled into Triple Whale, but it's important to note that each channel has its own API limits which can affect the extent of data that can be retrieved. When you integrate a new channel with Triple Whale, the platform will pull historical data up to the limit allowed by the specific channel's API.

For instance, some channels may provide access to a full year's worth of data, while others might limit access to only a few months. These API limitations are set by the individual platforms and can vary widely. Therefore, the amount of historical data you can backfill into Triple Whale will depend on the specific integrations and their respective API constraints.

For detailed information on the API limits and capabilities of each channel, you can refer to the Integrations documentation. These resources provide comprehensive guidelines on how each integration works and what you can expect in terms of historical data retrieval.