What is a synonym for anecdoteless?

There isn't a perfect synonym for "anecdoteless" because it's a rather uncommon word. However, depending on the context, you could use phrases like:

General Lack of Storytelling:

* Unengaging

* Dry

* Bland

* Monotonous

* Uninteresting

* Devoid of narrative

* Lacking in personal touches

Specifically Relating to Stories:

* Storyless

* Narrative-free

* Without a personal touch

* Fact-based

* Direct (if the context is about avoiding anecdotes in favor of direct information)

The best synonym will depend on the specific meaning you want to convey.