ISO 27001 covers information security. ISO 22301 covers business continuity more broadly — including your ability to maintain critical operations during disruptions that have nothing to do with information security, such as supply chain failures, loss of key staff, or a crisis at a critical supplier.
Many organisations hold both standards.
Because they share a common High Level Structure, maintaining the two together is considerably less burdensome than maintaining either in isolation, and a combined audit approach with the right certification body can reduce your overall compliance overhead.
We support integrated implementations and can advise on whether pursuing both makes sense for your organisation.