Technology Errors & Omissions — also called tech professional liability — covers financial loss a customer suffers because your technology or services failed to do what you said they would. A missed SLA, a bug that corrupted records, an integration that silently dropped transactions, a model that produced an output someone relied on. General Liability will not respond to any of that, because there is no bodily injury and no physical property damage.
It is the policy enterprise procurement is actually asking about when an MSA says 'professional liability' or 'errors and omissions.' Limits of $1M to $5M are the most common contractual asks, and the requirement usually appears alongside cyber, general liability, workers' compensation, and umbrella in the same insurance exhibit.
For AI companies, this is the coverage that has changed the most. Some carriers now attach broad exclusions for claims arising from artificial intelligence; others offer affirmative AI coverage. Two policies with the same limit and premium can behave in completely opposite ways when a model output is at the center of the claim. Reading that language is the job.